☆ 4.7 Article

Experimental investigation on the self-ignition behaviour of coal dust accumulations in oxy-fuel combustion system

FUEL (2015)

期刊

FUEL

卷 160, 期 -, 页码 245-254

出版社

ELSEVIER SCI LTD

DOI: 10.1016/j.fuel.2015.07.050

关键词

Critical ignition temperature; Oxygen rich; Hot oven; Hot plate; O-2/CO2 ambient; Kinetic parameters

类别

Energy & Fuels Engineering, Chemical

资金

European FP7 project RELCOM
China Scholarship Council

向作者/读者索取更多资源

Protocol

Reagent

摘要

For the oxy-coal combustion, the accumulation of coal dust in the system has a fire risk of self-ignition. Therefore, understanding the ignition dynamics of coal dust deposits in oxygen-enriched environment is essential for the prevention of fire and dust explosion. In this work, both hot-oven and hot-plate tests were conducted to study the self-ignition behaviour of coal dusts in O-2/CO2 ambient with O-2 mole fraction from 21% to 50%. Three coal dusts: Indonesian Sebuku coal, Pittsburgh No. 8 coal and South African coal were tested with different sizes. Experimental results revealed that the self-ignition risk increased significantly with the increasing O-2 mole fraction: reducing both the critical ignition temperature (10 degrees C in hot-oven test and 40 degrees C in hot-plate test) and the ignition delay time. Comparatively, the inhibiting effect of CO2 was found to be small for self-ignition. In addition, a modified Frank-Kamenetzkii analysis was proposed to explain all measured critical ignition temperatures, and the genetic algorithm was used to determine kinetic parameters of the one-step global reaction. The analysis showed that as the coal maturity/rank increased, both the self-ignition risk and the sensitivity to oxidation decreased, along with the decreasing apparent activation energy and pre-exponential factor. Such trend did not change with the ambient oxygen condition for all three coal dusts. These results improve our understanding of the self-ignition behaviour and the fire risk of coal dust in the oxy-fuel combustion system. (C) 2015 Published by Elsevier Ltd.

作者

我是这篇论文的作者

点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7

评分不足

次要评分

新颖性

-

重要性

-

科学严谨性

-

评价这篇论文

推荐

Article Energy & Fuels

Kinetic studies of ignition of coal char particle suspension in hot air

Pikai Zhang, Huangwei Zhang, Yun Feng Zhang

Summary: This study investigates the kinetic characteristics of char ignition and finds that ignition time is affected by various factors, while ignition temperature is mainly influenced by equivalence ratio. Under fuel-rich conditions, the combustion process experiences a thermal runaway and a decay stage. The study also explores the factors affecting the heat release rate peak in detail.

FUEL (2024)

添加到收藏夹

Article Thermodynamics

Ignition delay times of C2H4, C2H4/n-C4H10, and n-C4H10/i-C4H10 under O-2/CO2 atmospheres: Shock tube experiments and kinetic model

Chao Peng, Chun Zou, Jiaxin Ren, Qianjin Lin, Wenxiang Xia, Jianghui Luo, Yiyang Xiao

Summary: In this study, the ignition delay times of C2H4 diluted in CO2 were measured to investigate its submechanism in oxy-fuel combustion and the effects of CO2. The modified Oxymech model accurately predicted the experimental results and showed better performance than the NUIGMECH1.1 model. The comprehensive effects of CO2 on the ignition delay of C2H4 were discussed.

COMBUSTION AND FLAME (2023)

添加到收藏夹

Article Thermodynamics

Experimental and Kinetic Study on the Critical Ambient Density for Auto-ignition of the Diesel Spray under Cold-start Conditions

Yikai Li, Chenghan Sun, Zhongjie Shi, Yongli Gao, Lu Zhang, Haiyan Chen, Manlin Wang

Summary: This study investigates the effect of ambient density on spray two-stage auto-ignition characteristics under cold-start condition using both optical and numerical methods. The results show that high-temperature ignition is more sensitive to ambient density than low-temperature ignition, due to the increased suppression of high-temperature chemistry at higher ambient density. Additionally, the study finds that ambient density has little effect on the ignition site in the mixture fraction space. Kinetic analysis reveals that as ambient density decreases, the concentration of O-2 decreases, leading to reduced reaction rates of both low-temperature and high-temperature reactions and increased ignition delay. When the ignition delay becomes too long due to continuing diffusion after the end of injection, the spray misfire occurs.

COMBUSTION SCIENCE AND TECHNOLOGY (2023)

添加到收藏夹

Article Energy & Fuels

Numerical and Chemical Kinetic Analyses on the Formation of CO and CO2 for C1-C4 Hydrocarbon Alkanes in a Hot Co-Flow under MILD Combustion

Subrat Garnayak, Debojit Sharma, Sukanta K. Dash, V. Mahendra Reddy

Summary: Computational fluid dynamics and chemical kinetic analysis were conducted to explore the formation of CO and CO2 for fuel jet with different hydrocarbon alkanes in a MILD combustion environment. The results showed that the formation of CO was highest for case 3 and lowest for case 1, while the reverse trend was observed for CO2 formation. Acetylene was found to play a vital role in CO formation, while the formation of CO2 was mainly influenced by the reaction between CO and OH.

ENERGY & FUELS (2023)

添加到收藏夹

Article Engineering, Multidisciplinary

Measurement, calibration, and verification on the critical ignition temperature of hot bridge wire electro-explosive device

Xuxu Lyu, Guanghui Wei, Xinfu Lu, Xue Du, Jiangning Sun, Hongze Zhao

Summary: This paper addresses the temperature difference problem in fiber optic thermometry by studying the temperature rise of the bridge wire in the hot bridge wire electro-explosive device (EED). A measurement and calibration technique is proposed and validated, showing high accuracy.

MEASUREMENT SCIENCE AND TECHNOLOGY (2023)

添加到收藏夹

Article Chemistry, Physical

Boron-rich enhanced ambient CO2 capture and storage of boron-carbon-nitride hybrid nanotubes

Fatemeh Ershadi Moghaddam, Farzaneh Shayeganfar, Ali Ramazani

Summary: This study investigates the physical and chemical adsorption of CO2 on boron-rich nanotubes. The results show that boron-rich BC4N nanotubes undergo physical adsorption, while boron-rich BC2N and p-BCN nanotubes exhibit both chemical and physical adsorption. Additionally, the sensitivity factor and adsorption energy of boron-rich BC2N nanotubes are higher than those of other hybrid nanotubes, making them a promising candidate for CO2 capture under ambient conditions.

JOURNAL OF MATERIALS CHEMISTRY A (2023)

添加到收藏夹

Article Thermodynamics

Ignition delay times of n-butane and i-butane under O2/CO2 atmospheres: Shock tube experiments and kinetic model

Chao Peng, Chun Zou, Wenxiang Xia, Qianjin Lin, Jianghui Luo, Haiyang Shi, Lixin Lu, Shusen Wang

Summary: Pressurized oxy-fuel combustion is considered an advanced technique with lower cost and little decrease in efficiency compared to conventional PC systems without CO2 capture. Experimental and modeling work on n-butane ignition delay times under different conditions validates the updated chemical kinetic model Oxymech2.0 Plus, which shows improved prediction accuracy for butane combustion in O2 / CO2 atmospheres. The effects of equivalence ratios and CO2 concentrations on the ignition delay times of n-butane were analyzed.

COMBUSTION AND FLAME (2021)

添加到收藏夹

Article Thermodynamics

A shock-tube and modeling study of syngas ignition delay times in rich CO2 environment at elevated pressures

Wenyu Li, Chun Zou, Hong Yao

Summary: Oxy-fuel combustion techniques are crucial for reducing greenhouse gas emissions in fossil fuel power plants. In this study, ignition delay time data were measured for stoichiometric syngas mixtures with different CO concentrations in the presence of CO2. The CO2 collision efficiency in reaction H+O2(+M)=HO2(+M) showed high sensitivity to model predictions.

COMBUSTION AND FLAME (2023)

添加到收藏夹

Article Chemistry, Multidisciplinary

Edge-Site-Rich Ordered Macroporous BiOCl Triggers C(sic)O Activation for Efficient CO2 Photoreduction

Gaopeng Liu, Bin Wang, Xingwang Zhu, Penghui Ding, Junze Zhao, Huaming Li, Ziran Chen, Wenshuai Zhu, Jiexiang Xia

Summary: By constructing edge-site-rich ordered macroporous BiOCl, this study effectively enhances the catalytic performance of semiconductors, facilitating the conversion process of CO2.

SMALL (2022)

添加到收藏夹

Article Chemistry, Multidisciplinary

Direct CO2 capture from simulated and ambient air over silica-rich MIL-101(Cr)

Vaishnavi Kulkarni, Sanjay Kumar Singh

Summary: In this study, the textural properties of metal-organic frameworks (MOFs) were tuned by incorporating silica-rich rice husk ash (RHA) in MIL-101(Cr), resulting in enhanced CO2 capture. The RHA-MIL-101(Cr) showed higher CO2 capture capacity and stability compared to pristine MIL-101(Cr), making it suitable for direct air capture (DAC) applications.

REACTION CHEMISTRY & ENGINEERING (2023)

添加到收藏夹

Article Chemistry, Applied

The ignition modes transformation and critical parameters for single coal particle under O2/CO2 atmospheres

Tingyao Zhang, Yuegui Zhou, Zhongfa Hu

Summary: Oxy-coal combustion is an effective technology for CO2 capture and storage, and the ignition and combustion characteristics of pulverized coal particles are influenced by the physicochemical properties of CO2 and N2. A modified transient model was developed to predict the ignition delays and modes of coal particles under O2/CO2 atmospheres, and the effects of CO2 properties on ignition delays and modes were analyzed. The results showed that the increased thermal sink and decreased gas mixture reactivity of CO2 led to prolonged ignition delays under O2/CO2 atmospheres.

FUEL PROCESSING TECHNOLOGY (2023)

添加到收藏夹

Article Nanoscience & Nanotechnology

Hydroxy-Rich Pillar[5]arene-Based Nanoporous Aromatic Frameworks (PAFs) for Efficient CO2 Uptake under Ambient Conditions

Ming-Ming Zhai, Cheng-Yu Wu, Yahu A. Liu, Wei-Bo Hu, Hui Yang, Ke Wen

Summary: This letter reports the fabrication of a three-dimensional hydroxy-rich nanoporous framework PAF-P5-OH, which exhibits excellent CO2 uptake capacity due to the dipole interactions between the adsorbed CO2 molecules and the hydroxy groups in PAF-P5-OH.

ACS APPLIED NANO MATERIALS (2022)

添加到收藏夹

Article Engineering, Chemical

Metalloporphyrin and triazine integrated nitrogen-rich frameworks as high-performance platform for CO2 adsorption and conversion under ambient pressure

Ran Ping, Chi Ma, Zhiyuan Shen, Guojie Zhang, Dongchao Wang, Fusheng Liu, Mengshuai Liu

Summary: In this study, metalloporphyrin and triazine integrated nitrogen-rich frameworks were constructed and investigated for their CO2 adsorption and catalytic conversion properties. Zn c PPTF15 was found to possess dual functions of CO2 adsorption and conversion, with high catalytic activity and recyclability.

SEPARATION AND PURIFICATION TECHNOLOGY (2023)

添加到收藏夹

Article Materials Science, Composites

Enhanced capture of waste and diluted CO2 by N/O-rich multilayered ultramicropores bio-carbon composites materials

Wei Hui, Fei-Feng Mao, Xiang Wang, Xin-Yi Xu, Hai-Jun Wang

Summary: An efficient method was developed to prepare activated N/O-rich multilayer ultramicropores carbon composite materials for effectively capturing waste and diluted CO2. The adsorptive capacity and retention time of the porous carbon material suggest its potential for CO2/N2 separation in the industrial field.

COMPOSITES COMMUNICATIONS (2021)

添加到收藏夹

Article Engineering, Chemical

Adsorption Kinetic Behavior of Gaseous and Supercritical CO2 in the Near-Critical Region on Shale

Min Gu, Xi Qing, Xiaoyang Tang, Tingyu Zhuo

Summary: The adsorption kinetic behaviors of CO2 on WF shale were investigated in different pressure and temperature ranges. The results showed that the adsorption curves exhibited different types of fluctuations depending on the pressure and temperature. These behaviors were determined by the change rate of CO2 physical parameters, and exhibited fluctuation in the near-critical region.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2022)

添加到收藏夹

Article Materials Science, Multidisciplinary

Smoldering ignition and emission dynamics of wood under low irradiation

Zhirong Liang, Shaorun Lin, Xinyan Huang

Summary: Wood, as a sustainable building material, has gained renewed attention for high-rise buildings. However, fire safety remains a concern due to the potential for both flaming and smoldering fires. This study investigates the smoldering ignition of wood blocks under low-intensity irradiation and the behavior of smoldering fire after irradiation removal. The research provides valuable insights into the fire risk of wood materials and their burning behaviors.

FIRE AND MATERIALS (2023)

添加到收藏夹

Article Thermodynamics

Studying the Synergistic Roles of Nanostructures on the Rapid Boiling Process Using Molecular Dynamics Simulation

Shakeel Ahmad, Chung Ki Cheng, Kwun Ting Lau, Shahid Ali Khan, Xinyan Huang, Jiyun Zhao

Summary: This work investigates the rapid boiling heat transfer over an integrated surface with cavities and pillars at nanoscale using molecular dynamics simulations. The results show that the integrated surface has a lower bubble nucleation time, higher evaporation rate, and higher heat flux compared to other surfaces.

HEAT TRANSFER ENGINEERING (2023)

添加到收藏夹

Article Thermodynamics

Predicting real-time fire heat release rate by flame images and deep learning

Zilong Wang, Tianhang Zhang, Xinyan Huang

Summary: This work explores real-time prediction of fire heat release rate using fire scene images and deep learning algorithms. A large database of fire tests is formed to train the deep learning model. The results show that the proposed AI-image fire calorimetry method can well identify the transient fire heat release rate using only fire scene images.

PROCEEDINGS OF THE COMBUSTION INSTITUTE (2023)

添加到收藏夹

Article Engineering, Multidisciplinary

Flame Spread Transition to Regression of Thick Fuel in Oxygen-Limited Concurrent Flow

Feng Zhu, Xinyan Huang, Xiao Chen, Shuangfeng Wang

Summary: The behaviors of flame in a narrow gap with low-velocity airflow were studied. It was found that the flame spread can transition to fuel regression and extinction as the airflow and oxygen concentration decrease. This research provides new insights into flame behavior under oxygen-limited and microgravity environments.

FIRE TECHNOLOGY (2023)

添加到收藏夹

Article Computer Science, Artificial Intelligence

Multi-domain ubiquitous digital twin model for information management of complex infrastructure systems

Yishuo Jiang, Ming Li, Wei Wu, Xiqiang Wu, Xiaoning Zhang, Xinyan Huang, Ray Y. Zhong, George G. Q. Huang

Summary: A digital twin is a digital version of an object or activity that reflects its properties and behavior through virtual models and data. It is widely used in the construction, operation, and maintenance of infrastructure and facilities. Stakeholders from different disciplines are involved in the long-term management of IoT and digital twin-enabled smart infrastructures and conflicts can arise due to differences in experience, knowledge, and interests. This paper proposes a Ubiquitous Digital Twin model based on Domain-Driven Design to manage complex infrastructure systems and evaluates it through three instantiated scenarios.

ADVANCED ENGINEERING INFORMATICS (2023)

添加到收藏夹

Review Engineering, Multidisciplinary

A Review on Higher Education of Fire Safety in China

Supan Wang, Xinyan Huang

Summary: With the rapid urbanization and economic growth in China, the higher education in Fire Safety Science and Engineering has undergone significant development and changes. This systematic review examines the history and evolution of fire safety higher education in China, from its early years in Fire Protection Technology to the present-day focus on Human-Oriented Public Safety and Smart Firefighting. The review explores the curriculum and programs offered in representative universities, as well as the unique features and diversity found in different institutes.

FIRE TECHNOLOGY (2023)

添加到收藏夹

Article Thermodynamics

Electric field inspired alternating surface wettability for enhancing pool boiling heat transfer performance: A lattice Boltzmann method study

Shakeel Ahmad, Zulfiqar Ali, Syed Waqar Ali Shah, Xinyan Huang, Jiyun Zhao

Summary: This study used alternating wettability inspired by an electric field to enhance boiling heat transfer performance over a rough surface. The simulation results showed that alternating wettability can accelerate bubble expansion and shrinking, leading to a 53% increase in critical heat flux at high wall superheats.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2023)

添加到收藏夹

Article Thermodynamics

Can heavy rainfall affect the burning and smoke spreading characteristics of fire in tunnels?

Chuangang Fan, Dia Luan, Rongwei Bu, Ziqiong Sheng, Feiyue Wang, Xinyan Huang

Summary: Extreme rainfall events due to global warming have been investigated for their impact on tunnel fires and smoke spread. Reduced-scale experiments with varying rainfall intensities, raindrop sizes, and fire heat release rates were conducted. It was found that heavy rainfall induced a longitudinal airflow inside the tunnel, causing the flame to tilt towards the no-rainfall portal. This induced airflow had a limited effect on the burning rate of pool fires, but it affected the ceiling temperature and prevented smoke back-layering towards the rainfall portal. The distribution of ceiling temperature towards the no-rainfall portal was not sensitive to rainfall and could be described by an empirical model.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2023)

添加到收藏夹

Article Engineering, Environmental

Real-time pipeline leak detection and localization using an attention-based LSTM approach

Xinqi Zhang, Jihao Shi, Ming Yang, Xinyan Huang, Asif Sohail Usmani, Guoming Chen, Jianmin Fu, Jiawei Huang, Junjie Li

Summary: This study proposes a leakage detection and localization approach by integrating attention mechanism with LSTM network. A labor-scale pipeline leakage experiment is conducted to construct the benchmark dataset and a comparison between the proposed approach and the state-of-the-art methods is performed. The results demonstrate higher accuracy with AUC = 0.99.

PROCESS SAFETY AND ENVIRONMENTAL PROTECTION (2023)

添加到收藏夹

Article Thermodynamics

Single-phase static immersion cooling for cylindrical lithium-ion battery module

Yanhui Liu, Gulzhan Aldan, Xinyan Huang, Menglong Hao

Summary: This work proposes a static flow-based immersion cooling method for a six-cell cylindrical Li-ion battery module, which can limit the temperature below 40 degrees C and exhibit superior cooling capability over air cooling. A three-dimensional numerical model is established to analyze and optimize the cooling system's performance, suggesting a higher cooling rate compared to forced air-cooling. The effects of ambient temperature and liquid volume have also been investigated.

APPLIED THERMAL ENGINEERING (2023)

添加到收藏夹

Article Computer Science, Artificial Intelligence

Towards deep probabilistic graph neural network for natural gas leak detection and localization without labeled anomaly data

Xinqi Zhang, Jihao Shi, Xinyan Huang, Fu Xiao, Ming Yang, Jiawei Huang, Xiaokang Yin, Asif Sohail Usmani, Guoming Chen

Summary: This study proposes a deep probabilistic graph neural network that models the spatial dependency of sensors to improve leakage detection. The results demonstrate that the model achieves competitive detection accuracy and provides more comprehensive leakage detection information. Additionally, the model's posterior distribution enhances leakage localization accuracy.

EXPERT SYSTEMS WITH APPLICATIONS (2023)

添加到收藏夹

Article Chemistry, Physical

Encapsulated carbon nanotube array as a thermal interface material compatible with standard electronics packaging

Ruixiang Bai, Yangbing Wei, Jiyuan Xu, Xiaobo Li, Menglin Li, Ziwen Zou, Xinyan Huang, Chengyu Liu, Yiwei Sun, Menglong Hao

Summary: A new thermal interface material (TIM) is developed by encapsulating vertically aligned carbon nanotubes arrays (VACNTs) with copper microfoils, providing a solution to VACNTs' problem in device integration and contact resistance. The new TIM demonstrates excellent thermal performance and reliability in light emitting diode (LED) cooling experiment.

NANO RESEARCH (2023)

添加到收藏夹

Article Construction & Building Technology

Intelligent emergency digital twin system for monitoring building fire evacuation

Yifei Ding, Yuxin Zhang, Xinyan Huang

Summary: The provision of real-time and detailed evacuation information feedback is crucial for the formulation and adaptation of the onsite evacuation strategy. This study proposes an Intelligent Emergency Digital Twin system that utilizes computer vision and deep learning to detect and track evacuees, calculate their egress speed, and protect their privacy. The system was evaluated in an office building staircase and showed positive results with a high detection rate. The data generated by the digital twin system can be valuable for guiding evacuations in fire scenarios.

JOURNAL OF BUILDING ENGINEERING (2023)

添加到收藏夹

Article Thermodynamics

Ignition limit of EPS foam by a hot particle under cross wind

Supan Wang, Chunyin Zhang, Kaifeng Wang, Xinyan Huang

Summary: This study investigates the influence of external airflow on the ignition flash and fire points of building insulation materials. The results show that airflow can facilitate the attainment of flash and fire points, with a stable delay time at higher airflow velocities. Flame retardants can inhibit the transition to fire point but do not affect the flash ignition.

CASE STUDIES IN THERMAL ENGINEERING (2023)

添加到收藏夹

Article Thermodynamics

A transient multi-path decentralized resistance-capacity network model for prismatic lithium-ion batteries based on genetic algorithm optimization

C. X. He, Y. H. Liu, X. Y. Huang, S. B. Wan, Q. Chen, J. Sun, T. S. Zhao

Summary: A decentralized centroid multi-path RC network model is constructed to improve the temperature prediction accuracy compared to traditional RC models. By incorporating multiple heat flow paths and decentralizing thermal capacity, a more accurate prediction is achieved.

ENERGY CONVERSION AND MANAGEMENT (2024)

添加到收藏夹

Article Energy & Fuels

Preparation of surface modified nano-hydrotalcite and its applicaiton as a flow improver for crude oil

Yingna Du, Chen Huang, Wei Jiang, Qiangwei Yan, Yongfei Li, Gang Chen

Summary: In this study, anionic surfactants modified hydrotalcite was used as a flow improver for crude oil under low-temperature conditions. The modified hydrotalcite showed a significant viscosity reduction effect on crude oil. The mechanism of the modified hydrotalcite on viscosity and pour point of crude oil was explored through characterization and analysis of the modified hydrotalcite and oil samples.

FUEL (2024)

添加到收藏夹

Article Energy & Fuels

Effect of incorporated hybrid MIL-53(Al) and MWCNT into PES membrane for CO2/CH4 and CO2/N2 separation

Mohammad Saeid Rostami, Mohammad Mehdi Khodaei

Summary: In this study, a hybrid structure, MIL-53(Al)@MWCNT, was synthesized by combining MIL-53(Al) particles and -COOH functionalized multi-walled carbon nanotube (MWCNT). The hybrid structure was then embedded in a polyethersulfone (PES) polymer matrix to prepare a mixed matrix membrane (MMM) for CO2/CH4 and CO2/N2 separation. The addition of MWCNTs prevented MIL-53(Al) aggregation, improved membrane mechanical properties, and enhanced gas separation efficiency.

FUEL (2024)

添加到收藏夹

Article Energy & Fuels

Phase behaviour and physical properties of dimethyl ether (DME)/flue gas/ water/heavy oil systems under reservoir conditions

Yunlong Li, Desheng Huang, Xiaomeng Dong, Daoyong Yang

Summary: This study develops theoretical and experimental techniques to determine the phase behavior and physical properties of DME/flue gas/water/heavy oil systems. Eight constant composition expansion (CCE) tests are conducted to obtain new experimental data. A thermodynamic model is used to accurately predict saturation pressure and swelling factors, as well as the phase boundaries of N2/heavy oil systems and DME/CO2/heavy oil systems, with high accuracy.

FUEL (2024)

添加到收藏夹

Article Energy & Fuels

Comparison of CO2 absorption in DETA solution and [bmim]-[PF6] using thermodynamic and process modelling

Morteza Afkhamipour, Ebad Seifi, Arash Esmaeili, Mohammad Shamsi, Tohid N. Borhani

Summary: Non-conventional amines are being researched worldwide to overcome the limitations of traditional amines like MEA and MDEA. Adequate process and thermodynamic models are crucial for understanding the applicability and performance of these amines in CO2 absorption, but studies on process modeling for these amines are limited. This study used rate-based modeling and Deshmukh-Mather method to model CO2 absorption by DETA solution in a packed column, validated the model with experimental data, and conducted a sensitivity analysis of mass transfer correlations. The study also compared the CO2 absorption efficiency of DETA solution with an ionic solvent [bmim]-[PF6] and highlighted the importance of finding optimum operational parameters for maximum absorption efficiency.

FUEL (2024)

添加到收藏夹

Article Energy & Fuels

Interfacial tension of smart water and various crude oils

Arastoo Abdi, Mohamad Awarke, M. Reza Malayeri, Masoud Riazi

Summary: The utilization of smart water in EOR operations has gained attention, but more research is needed to understand the complex mechanisms involved. This study investigated the interfacial tension between smart water and crude oil, considering factors such as salt, pH, asphaltene type, and aged smart water. The results revealed that the hydration of ions in smart water plays a key role in its efficacy, with acidic and basic asphaltene acting as intrinsic surfactants. The pH also influenced the interfacial tension, and the aged smart water's interaction with crude oil depended on asphaltene type, salt, and salinity.

FUEL (2024)

添加到收藏夹

Article Energy & Fuels

Co-based metal-organic frameworks confined N-hydroxyphthalimide for enhancing aerobic desulfurization of diesel fuels

Dongao Zhu, Kun Zhu, Lixian Xu, Haiyan Huang, Jing He, Wenshuai Zhu, Huaming Li, Wei Jiang

Summary: In this study, cobalt-based metal-organic frameworks (Co-based MOFs) were used as supports and co-catalysts to confine the NHPI catalyst, solving the leaching issue. The NHPI@Co-MOF with carboxyl groups exhibited stronger acidity and facilitated the generation of active oxygen radicals O2•, resulting in enhanced catalytic activity. This research provides valuable insights into the selection of suitable organic linkers and broadens the research horizon of MOF hybrids in efficient oxidative desulfurization (ODS) applications.

FUEL (2024)

添加到收藏夹

Article Energy & Fuels

Influence of carbon-coated zero-valent iron-based nanoparticle concentration on continuous photosynthetic biogas upgrading

Edwin G. Hoyos, Gloria Amo-Duodu, U. Gulsum Kiral, Laura Vargas-Estrada, Raquel Lebrero, Rail Munoz

Summary: This study investigated the impact of carbon-coated zero-valent nanoparticle concentration on photosynthetic biogas upgrading. The addition of nanoparticles significantly increased microalgae productivity and enhanced nitrogen and phosphorus assimilation. The presence of nanoparticles also improved the quality of biomethane produced.

FUEL (2024)

添加到收藏夹

Article Energy & Fuels

Effect of aqueous phase recycling on iron evolution and environmental assessment during hydrothermal carbonization of dyeing sludge

Yao Xiao, Asma Leghari, Linfeng Liu, Fangchao Yu, Ming Gao, Lu Ding, Yu Yang, Xueli Chen, Xiaoyu Yan, Fuchen Wang

Summary: Iron is added as a flocculant in wastewater treatment and the hydrothermal carbonization (HTC) of sludge produces wastewater containing Fe. This study investigates the effect of aqueous phase (AP) recycling on hydrochar properties, iron evolution and environmental assessment during HTC of sludge. The results show that AP recycling process improves the dewatering performance of hydrochar and facilitates the recovery of Fe from the liquid phase.

FUEL (2024)

添加到收藏夹

Article Energy & Fuels

Investigation on the lower flammability limit and critical inhibition concentration of hydrogen under the influence of inhibitors

He Liang, Tao Wang, Zhenmin Luo, Jianliang Yu, Weizhai Yi, Fangming Cheng, Jingyu Zhao, Xingqing Yan, Jun Deng, Jihao Shi

Summary: This study investigated the influence of inhibitors (carbon dioxide, nitrogen, and heptafluoropropane) on the lower flammability limit of hydrogen and determined the critical inhibitory concentration needed for complete suppression. The impact of inhibitors on explosive characteristics was evaluated, and the inhibitory mechanism was analyzed with chemical kinetics. The results showed that with the increase of inhibitor quantity, the lower flammability limit of hydrogen also increased. The research findings can contribute to the safe utilization of hydrogen energy.

FUEL (2024)

添加到收藏夹

Article Energy & Fuels

Phosphotungstic acid supported on Zr-SBA-15 as an efficient catalyst for one-pot conversion of furfural to ?-valerolactone

Zonghui Liu, Zhongze Zhang, Yali Zhou, Ziling Wang, Mingyang Du, Zhe Wen, Bing Yan, Qingxiang Ma, Na Liu, Bing Xue

Summary: In this study, high-performance solid catalysts based on phosphotungstic acid (HPW) supported on Zr-SBA-15 were synthesized and evaluated for the one-pot conversion of furfural (FUR) to γ-valerolactone (GVL). The catalysts were characterized using various techniques, and the ratio of HPW and Zr was found to significantly affect the selectivity of GVL. The HPW/Zr-SBA-15 (2-4-15) catalyst exhibited the highest GVL yield (83%) under optimized reaction conditions, and it was determined that a balance between Bronsted acid sites (BAS) and Lewis acid sites (LAS) was crucial for achieving higher catalytic performance. The reaction parameters and catalyst stability were also investigated.

FUEL (2024)

添加到收藏夹

Article Energy & Fuels

Experimental study of droplet vaporization for conventional and renewable transportation fuels: Effects of physical properties and chemical composition

Michael Stoehr, Stephan Ruoff, Bastian Rauch, Wolfgang Meier, Patrick Le Clercq

Summary: As part of the global energy transition, an experimental study was conducted to understand the effects of different fuel properties on droplet vaporization for various conventional and alternative fuels. The study utilized a flow channel to measure the evolution of droplet diameters over time and distance. The results revealed the temperature-dependent effects of physical properties, such as boiling point, liquid density, and enthalpy of vaporization, and showed the complex interactions of preferential vaporization and temperature-dependent influences of physical properties for multi-component fuels.

FUEL (2024)

添加到收藏夹

Article Energy & Fuels

An experimental and modeling study on the oxidation of ammonia-methanol mixtures in a jet stirred reactor

Yuan Zhuang, Ruikang Wu, Xinyan Wang, Rui Zhai, Changyong Gao

Summary: Through experimental validation and optimization of the chemical kinetic model, it was found that methanol can accelerate the oxidation reaction of ammonia, and methanol can be rapidly oxidized at high concentration. HO2 was found to generate a significant amount of OH radicals, facilitating the oxidation of methanol and ammonia. Rating: 7.5/10.

FUEL (2024)

添加到收藏夹

Article Energy & Fuels

Improving the biodiesel combustion and emission characteristics in the lean pre-vaporized premixed system using diethyl ether as a fuel additive

Radwan M. EL-Zohairy, Ahmed S. Attia, A. S. Huzayyin, Ahmed I. EL-Seesy

Summary: This paper presents a lab-scale experimental study on the impact of diethyl ether (DEE) as an additive to waste cooking oil biodiesel with Jet A-1 on combustion and emission features of a swirl-stabilized premixed flame. The addition of DEE to biodiesel significantly affects the flame temperature distribution and emissions. The W20D20 blend of DEE, biodiesel, and Jet A-1 shows similar flame temperature distribution to Jet A-1 and significantly reduces UHC, CO, and NOx emissions compared to Jet A-1.

FUEL (2024)

添加到收藏夹

Article Energy & Fuels

Condensation characteristics of ammonia vapor during supersonic separation: A novel approach to ammonia-hydrogen separation

Jiang Bian, Ziyuan Zhao, Yang Liu, Ran Cheng, Xuerui Zang, Xuewen Cao

Summary: This study presents a novel method for ammonia separation using supersonic flow and develops a mathematical model to investigate the condensation phenomenon. The results demonstrate that the L-P nucleation model accurately characterizes the nucleation process of ammonia at low temperatures. Numerical simulations also show that increasing pressure and concentration can enhance ammonia condensation efficiency.

FUEL (2024)

添加到收藏夹

Article Energy & Fuels

Multivariate time series prediction for CO2 concentration and flowrate of flue gas from biomass-fired power plants

Shiyuan Pan, Xiaodan Shi, Beibei Dong, Jan Skvaril, Haoran Zhang, Yongtu Liang, Hailong Li

Summary: Integrating CO2 capture with biomass-fired combined heat and power (bio-CHP) plants is a promising method for achieving negative emissions. This study develops a reliable data-driven model based on the Transformer architecture to predict the flowrate and CO2 concentration of flue gas in real time. The model validation shows high prediction accuracy, and the potential impact of meteorological parameters on model accuracy is assessed. The results demonstrate that the Transformer model outperforms other models and using near-infrared spectral data as input features improves the prediction accuracy.

FUEL (2024)

添加到收藏夹

© Peeref 2019-2024. All rights reserved.