Article
Chemistry, Physical
Tadeusz Czech
Summary: This study investigated the properties of iron and other metal particles in coal fly ash by analyzing their structure, composition, and phase using various instruments.
Article
Thermodynamics
Yuanyuan Zhang, Wenrui Li, Xiangying Cheng, Kezhou Yan, Wenxin Zhao, Fengling Yang
Summary: The combustion characteristics of coal gangue and weathered coal were studied under different atmospheres, and the interactions between the two were observed under oxygen-enriched oxy-fuel condition, which may be related to the thermal effect.
Article
Thermodynamics
Ali Cemal Benim, Cansu Deniz Canal, Yakup Erhan Boke
Summary: Computational investigation of swirling pulverized coal and biomass flames for oxy-combustion reveals that the Reynolds Stress Model (RSM) captures unsteady dynamics better than the k-epsilon model. Predicted velocities show better agreement with measurements using RSM. However, both models underestimate the measurements, with discrepancies quantified in peak values of axial velocity. Biomass flame is predicted to be nearly twice as long as coal flame.
Article
Energy & Fuels
Shiquan Shan, Xichuan Cai, Kun Li, Qi Zhang, Zhijun Zhou, Yanwei Zhang
Summary: This paper studies the radiative energy characteristics of oxy-fuel combustion of pulverized coal, focusing on spectral distribution characteristics. Experimental results show that the intensity of radiative energy and exergy increase with oxygen ratio and combustion temperature, while different atmospheres have little effect on radiation characteristics. One-dimensional calculation can better reveal proportional characteristics of spectral radiation.
Article
Energy & Fuels
Ming Lei, Yanchao Zhang, Dikun Hong, Bin Ye
Summary: In this study, pressurized coal pyrolysis and oxy-fuel combustion experiments were conducted to investigate the migration and transformation characteristics of nitrogen and sulfur. The results showed that high pressure inhibited the release of nitrogen and sulfur, while elevated temperature promoted their decomposition and conversion. CO2 gasification facilitated the release of volatiles and decomposition of nitrogen and sulfur-containing functional groups in coal. Pressurized oxy-fuel combustion resulted in lower emissions of NO, NO2, and SO2 compared to air combustion.
Article
Energy & Fuels
Pu Hong, Lin Li, Yuanqiang Duan, Yueming Wang, Lunbo Duan
Summary: Oxy-fuel combustion is an important means of reducing CO2 emissions in coal-fired power plants. This study explores the influence of the gasification reaction on oxy-fuel combustion and decouples the contribution ratio of the gasification reaction. The results show that increasing pressure, temperature, and oxygen concentration promotes the combustion process and increases the combustion rate. The problem of low combustion rate in oxy-fuel combustion can be solved by increasing the O2 concentration.
Article
Energy & Fuels
Chenghang Zheng, Lingyu Shao, Yifan Wang, Hao Zheng, Wenchao Gao, Hao Zhang, Zhicheng Wu, Jiali Shen, Xiang Gao
Summary: Flue gas generated from coal combustion is the primary source of air pollution, and temperature has a significant impact on particle growth and removal. Adjusting temperature and boiler load can effectively enhance particle removal efficiency.
Article
Energy & Fuels
Changsheng Bu, Xu Zhao, Bo Leckner, Alberto Gomez-Barea, Daoyin Liu, Junguang Meng, Changqi Liu, Xinye Wang, Jubing Zhang, Guilin Piao
Summary: Adding active oxygen carriers to the inert bed material improves oxygen distribution in fluidized bed combustors. This method, known as Oxygen-carrier-aided combustion (OCAC), has been used in air combustion in FB boilers and shows potential for oxy-fuel combustion. Experimental analysis of OCAC in oxy-fuel combustion was conducted using different coals and oxygen carriers. The results demonstrate that the burnout temperature decreases with oxygen carriers, while ignition temperature remains stable. The effect of oxygen carriers on char combustion rate follows the sequence: steel slag < hematite < AR-Fe2O3, with stronger effects observed for lower rank fuels. Combustion kinetics of chars using oxygen carriers exhibit higher activation energy and pre-exponential factor compared to pure char, indicating enhanced oxygen transport to the carbon surface.
Article
Green & Sustainable Science & Technology
Xiaorui Liang, Qinhui Wang, Zhongyang Luo, Eric Eddings, Terry Ring, Simin Li, Peng Yu, Jiqing Yan, Xudong Yang, Xin Jia
Summary: The research found that under pressurized oxy-fuel combustion conditions, both an increase in system pressure and temperature led to a significant impact on NOx emissions, while an increase in oxygen concentration also resulted in an increase in NOx emissions. These results highlight the importance of understanding the impact of operating parameters on NOx emissions.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Thermodynamics
Christopher R. Shaddix, Ethan S. Hecht, Cristina Gonzalo-Tirado, Brian S. Haynes
Summary: Previous research has shown that CO2 and H2O gasification reactions play a significant role in the combustion of pulverized coal (pc) char, especially in oxy-fuel environments. This study aims to quantify the influence of CO2 gasification reaction by combining experimental measurements and simulations. The results demonstrate a consistent relationship between the gasification reaction rate and the char particle temperatures and burnout rates in oxy-fuel combustion environments.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2023)
Article
Thermodynamics
Chaowei Wang, Chang'an Wang, Maoyun Luo, Lin Zhao, Pengqian Wang, Yujie Hou, Pengbo Zhao, Defu Che
Summary: The technology of oxy-fuel co-combustion is beneficial for consuming large amounts of ultra-low volatile coal-based solid fuels. It can promote the development of coal-chemical industry and reduce carbon emissions in power plants. However, the co-gasification behaviors of various coal-based solid fuel blends during the initial oxy-fuel co-firing stage need further study.
Article
Chemistry, Applied
Xinglei Qiu, Yueming Wang, Zhengang Zhou, Yuanqiang Duan, Lunbo Duan
Summary: Pressurized fluidized bed oxy-fuel combustion is considered a promising clean coal technology for CO2 capture. This study investigated the particulate matter formation under pressurized conditions and found that the concentration of PM1 in oxy-fuel combustion was higher than in air combustion, but the difference decreased with increasing pressure. Additionally, elevated pressure reduced the concentration of PM1 while increasing the concentration of PM1-10.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Engineering, Chemical
Yu Qiu, Wenqi Zhong, Aibing Yu
Summary: Pressurized oxy-fuel combustion has the potential for effective CO2 capture, with temperature and pressure positively affecting combustion characteristics. Higher pressure accelerates coal decomposition and enhances combustion performance, promoting the release of CO2.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Energy & Fuels
Shaolong Gao, Zhezi Zhang, Mingming Zhu, Fangqin Cheng, Dongke Zhang
Summary: The experiment studied the ignition and combustion characteristics of single coal gangue particles under simulated oxy-fuel combustion conditions. It found that coal gangue particles ignited homogeneously at high temperature but heterogeneously at low temperature in oxy-fuel conditions. Factors such as furnace temperature, particle size, O2 concentration, and steam addition all influenced the ignition and combustion process.
Article
Chemistry, Multidisciplinary
Fangyuan Si, Hongming Zhang, Xiangrui Feng, Jiawei Dou, Long Wu, Linglong Li, Lingyun Wang, Lanming Zhao
Summary: The thermal analysis behavior of pulverized coal combustion in different oxygen-rich atmospheres and the effects of heating rate on combustion characteristic were studied. The results showed that the combustion rate of pulverized coal increased and the burnout time decreased under the conditions of an oxygen-enriched atmosphere and high heating rate. The changes in oxygen concentration and heating rate mainly affected the combustion stage of coal samples.
Article
Chemistry, Multidisciplinary
Jingxian Zhang, Fan Lv, Zehui Li, Guangya Jiang, Meijuan Tan, Menglei Yuan, Qinghua Zhang, Youpeng Cao, Haoyun Zheng, Lingling Zhang, Cheng Tang, Wangyang Fu, Can Liu, Kaihui Liu, Lin Gu, Jingkun Jiang, Guangjin Zhang, Shaojun Guo
Summary: By doping Cr into Pd metallene, the electronic structure of Pd is efficiently optimized, reducing the interaction between Pd and CO, leading to a preference for CO2 production and suppression of CO adsorption. This results in a highly sensitive and anti-interference detection of formaldehyde.
ADVANCED MATERIALS
(2022)
Article
Engineering, Chemical
Hui Ouyang, Yuechen Qiao, My Yang, Ian A. Marabella, Christopher J. Hogan, Montserrat Torremorell, Bernard A. Olson
Summary: Aerosol control technologies are crucial for mitigating aerosol-transmitted virus infections, and standardized evaluation methods are needed to compare them. This study proposes the use of a single-pass wind tunnel to assess the performance of aerosol control technologies and applies it to three different technologies. The log reduction of tested technologies is determined through the collection and testing of virus aerosol particles.
JOURNAL OF AEROSOL SCIENCE
(2022)
Article
Chemistry, Physical
Guanyu Song, Jesse M. Adamczyk, Eric S. Toberer, Christopher J. Hogan Jr
Summary: Aerosol deposition (AD) is a commonly used material processing technique for generating dense coatings. One advantage of AD is the homogeneous mixing of different materials in the gas phase. In this study, the researchers demonstrate the application of AD in materials synthesis by directly depositing elemental precursor powders into adjustable atomic ratio coatings. They successfully synthesized bismuth-antimony coatings with various atomic ratios and achieved solid solutions with desirable thermoelectric properties after annealing. Molecular dynamics simulations further revealed the plastic deformation and fracture mechanisms during coating consolidation.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Chemical
Stephanie M. Eilts, Tomoya Tamadate, Mckenna E. Relling, Ian A. Marabella, Christopher J. Hogan Jr, Bernard A. Olson
Summary: This article introduces the development and testing of virtual impactors operating near the sonic limit, which are capable of concentrating submicrometer particles and achieving near-complete pressure recovery in the minor flow. The performance of the virtual impactors is evaluated under different sampling flow pressures, revealing the particle losses at different particle sizes and explaining the causes.
JOURNAL OF AEROSOL SCIENCE
(2023)
Article
Chemistry, Physical
Tomoya Tamadate, Suo Yang, Christopher J. Hogan
Summary: Coagulation plays a crucial role in determining the size distribution of nanoclusters during the synthesis of metal oxide nanomaterials at high temperatures. A neural network (NN) model was developed to describe the coagulation rate coefficients of titanium dioxide (TiO2) nanoclusters. Molecular dynamics (MD) trajectory calculations were used to train the NN model, which achieved over 95% accuracy in predicting coagulation outcomes. The NN model and MD trajectory calculations were employed to examine coagulation rate coefficients at different temperatures, with the NN model's predictions largely consistent with MD predictions and capturing the observed local minimum coagulation rate coefficients.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Haley M. M. Schramm, Tomoya Tamadate, Christopher J. J. Hogan, Brian H. H. Clowers
Summary: The rates and mechanisms of chemical reactions at phase boundaries are different from those in bulk solution, but are difficult to quantify. Ion-neutral interactions play critical roles in aerosol formation, atmospheric chemistry, and gas-phase ion separations, and their behavior during the early stages of solvation differs from bulk solution. By quantifying the degree of hydrogen-deuterium exchange (HDX) and ion-neutral clustering through a gas-phase ion separation technique, we found that cluster formation cannot be ignored when modeling complex nucleation processes and biopolymer structural dynamics.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Analytical
Viraj D. Gandhi, Jihyeon Lee, Leyan Hua, Mohsen Latif, Christopher J. Hogan, Carlos Larriba-Andaluz
Summary: To improve ion separation techniques, a differential mobility analyzer (DMA) has been combined with field asymmetric waveform ion mobility spectrometry (FAIMS). The DMA's filtering effect allows for individual ion selection based on low-field mobility, and these ions can then be studied in FAIMS at different electric field strengths to achieve two-dimensional mobility separations. Comparisons with theoretical predictions show excellent results, although deviations occur beyond 100 Td due to ion heating and collisions with the nitrogen gas. A newly developed implicit equation is used to predict dispersion plots, overcoming issues associated with the more complex Buryakov equation. The results demonstrate that the DMA-FAIMS coupling provides comprehensive information on ion mobility and can predict spectra based on ion structures and gas properties.
ANALYTICAL CHEMISTRY
(2023)
Article
Engineering, Chemical
Yaxin Fan, Kaiqi Zhang, Huayun Xiao, Christopher J. Hogan, Chenxi Li
Summary: Recently, it has been shown that non-thermal plasmas can be used as nanoparticle processing reactors, heating particles selectively and inducing chemical reactions and structural transformations. In this study, the sintering of metallic nano-aggregates in a non-thermal plasma and a traditional tube furnace was compared. The behavior of silver aggregates was similar in both systems, while the behavior of bismuth aggregates was different due to early particle vaporization. The plasma reactor was found to be more effective in sintering bismuth particles, possibly due to the reducing environment and partial oxidation of the bismuth aggregates.
JOURNAL OF AEROSOL SCIENCE
(2023)
Article
Engineering, Mechanical
Austin J. Andrews, Devin A. J. McGee, Ioannis Pothos, Nathan A. Bellefeuille, Kaleb A. Siekmeier, Bernard A. Olson, Thomas E. Schwartzentruber, Christopher J. Hogan
Summary: This study developed an experimental system to examine surface cratering and particle deposition caused by high-speed micrometer particle impacts on Aluminum 6061-T6 substrates and Inconel 718 substrates. The results showed that there is a non-dimensional relationship between crater size, particle size, velocity, and incident angle for the aluminum samples. However, no discernible crater formation was observed for the impacts on Inconel 718, instead, adhesion and deformation of the impacting particles occurred.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Mechanical
Guanyu Song, Christopher J. Hogan
Summary: The effect of crystal grain size on particle impacts at supersonic speeds is examined. Smaller grain particles have higher critical strains and lower Young's moduli than their larger counterparts, and experience more heating and amorphization during high speed impacts.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Engineering, Chemical
Li Li, Ke'La A. Kimble, Brock A. Mitts, Michelle Heilig, Yuechen Qiao, Jihyeon Lee, Kimberly A. Prather, Christopher J. Hogan Jr
Summary: This study investigates the controlled surface roughness by sublimation-condensation system, which involves sublimation of solid organic powders and subsequent cooling to obtain vapor supersaturation for promoting particle growth. By testing the growth of particles under different temperature settings of the sublimator, it is found that optimized operating conditions can achieve particle diameters above 500 nm. In addition, it is discovered that both homogeneous and heterogeneous nucleation occur simultaneously during particle growth, which cannot be avoided if the diameter exceeds 500 nm. Finally, through numerical simulations and TDMA measurements, the effective vapor pressures for the sublimated solids are estimated, suggesting that saturation ratios above 102 are needed for nanoparticle growth.
JOURNAL OF AEROSOL SCIENCE
(2023)
Article
Chemistry, Physical
Haley M. Schramm, Tomoya Tamadate, Christopher J. Hogan, Brian H. Clowers
Summary: This study investigates gas-phase ion-neutral reactions of peptides and reveals the link between gas-phase hydrogen/deuterium exchange and the probabilities of vapor association. The effects of additional charges and structural characteristics on the reactions are also examined.
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Engineering, Chemical
Jose Moran, Li Li, Hui Ouyang, Yuechen Qiao, Bernard A. Olson, Christopher J. Hogan Jr
Summary: We have developed a method to directly invert the two-dimensional size and charge distributions of particles in a wire-plate electrostatic precipitator (ESP). By using a tandem differential mobility analyzer (TDMA) system and a DMA combined with an aerodynamic particle spectrometer, we obtained information on the charge levels attained by particles in the ESP. The charge distribution follows a Gaussian profile and the average charge scales in a power-law manner.
Article
Engineering, Multidisciplinary
Long H. Nguyen, Ian A. Marabella, Elizabeth R. Alonzi, Christopher J. Hogan Jr, Steven A. Fredericks
Summary: In agricultural spray application, the size distribution of droplets plays a crucial role in the effectiveness and potential risks. Accurate prediction of droplet size distribution is important for the development of new pesticides and spray nozzles. In this study, a relationship predicting droplet size distribution for flat fan sprays used in agrochemical application was developed based on energy conservation principle. Experimental results showed that the droplet size distribution can be normalized by the Sauter mean diameter for given nozzle type-spray tank mix combination.
ATOMIZATION AND SPRAYS
(2023)
Article
Engineering, Chemical
Austin J. Andrews, Philippe Buhlmann, Christopher J. Hogan
Summary: Ion selective electrodes (ISEs) are used to measure the phase boundary potential at the surface of a sensing membrane, but the influence of fluid flow on ISEs is not well studied. This study developed a numerical model to investigate the impact of external flow on the ISE membrane and aqueous sample interface, and found that flow distortion can increase the phase boundary potential.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Energy & Fuels
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.
Article
Energy & Fuels
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.
Article
Energy & Fuels
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.
Article
Energy & Fuels
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.
Article
Energy & Fuels
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.
Article
Energy & 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.
Article
Energy & Fuels
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.
Article
Energy & Fuels
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.
Article
Energy & Fuels
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.
Article
Energy & Fuels
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.
Article
Energy & Fuels
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.
Article
Energy & Fuels
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.
Article
Energy & Fuels
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.
Article
Energy & Fuels
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.
Article
Energy & Fuels
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.
