Article
Mathematics, Interdisciplinary Applications
Zhen Zhang, Gaofeng Liu, Ping Chang, Xiaoming Wang, Jia Lin
Summary: This paper proposes a novel method to calculate the fractal dimension Df for coal chemical structure and provides detailed deductions and summaries on the principle and methodology. The method was applied to calculate the fractal dimension Df for coal chemical structure from lignite to anthracite. The research results reveal that the fractal dimension Df for coal chemical structure decreases first and then increases with coalification, with the turning point corresponding to the second coalification jump (maximum vitrinite reflectance Ro, max = 1.30%). This study achieves micro characterization of coal chemical structure at the molecular scale, offering potential application value in the functional properties analysis and molecular synthesis design of coal-based material research fields.
CHAOS SOLITONS & FRACTALS
(2023)
Article
Materials Science, Composites
Seda Erdonmez, Yasar Karabul, Mehmet Kilic, Zeynep Guven Ozdemir, Kadir Esmer
Summary: In this study, polyindole/tungsten trioxide (PIn/WO3) nanocomposites were prepared and characterized for the first time, with investigations into their structural properties and frequency-dependent electrical features. The average particle size of WO3 was found to be between 15.36 and 44.71 nm, and dielectric analysis showed a decrease in ε' values with increasing WO3 content in the PIn matrix at low frequencies. Electric modulus analysis indicated an increase in M' value with frequency, suggesting the presence of short-range mobile charge carriers contributing to electrical conductivity.
POLYMER COMPOSITES
(2021)
Article
Multidisciplinary Sciences
Jian Tang, Junyu Zhao, Zuoyu Qin, Lijun Chen, Xianchong Song, Qin Ke, Lichao Wu, Yuanyuan Shi
Summary: This study investigates the effects of multi-generational succession of eucalyptus on soil fertility, organic structure, and biological properties. The results show that the succession leads to changes in soil organic functional group composition, with an increase in aromatic and phenolic alcohol functional groups. The study also finds a negative relationship between organic components and enzyme activity and biomass, indicating the inhibitory effect of these changes on eucalyptus growth.
ROYAL SOCIETY OPEN SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Qiang Huang, Xuehai Fu, Jian Shen, Qiangling Yao, Ming Cheng
Summary: The influence of confining pressure on the mechanical properties of coal samples of different ranks was studied through triaxial compression experiments. Numerical methods were used to establish the correlation between coal elastic modulus and confining pressure. The results showed that coal compressive strength had a positive linear relationship with confining pressure, while coal elastic modulus had an exponential relationship with confining pressure.
FRONTIERS OF EARTH SCIENCE
(2023)
Article
Materials Science, Ceramics
Fangru Ma, Bo Wei, Jianjiang Wang, Abudoureheman Maierhaba, Lijuan Chen, Xian Li
Summary: The content of Na2O directly affects the ash fusion temperatures (AFTs) of coal ash. Experimental and simulation results show that Na+ ions attack the oxygen molecules in coal ash, altering the structure of the ash and leading to a decrease in AFTs.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Energy & Fuels
Yabing Lin, Yong Qin, Dongmin Ma, Zhonghui Duan
Summary: The research focused on the impact of the first coalification jump (FCJ) on the reservoir properties of high-volatile bituminous coal rich in inertinite. Results showed that FCJ affects the adsorption capacity and pore structure of the coal. Langmuir pressure and volume were mainly controlled by the coalification process and macerals, with Langmuir pressure exhibiting a positive linear relationship with the ratio of vitrinite to inertinite.
Article
Materials Science, Ceramics
Tianyi Hua, Ouli Fu, Parvaneh Kheirkhah Barzoki, Yasser Gowayed
Summary: This study presents a method for fabricating metakaolin-based geopolymers that can maintain their structural and mechanical stability up to 600 degrees C. The chemical composition of the geopolymers was analyzed using thermogravimetric analysis and Fourier-transform infrared spectroscopy. The presence of residual free water led to damage when exposed to high temperatures, so the curing temperature was increased to remove water during the curing process. A correlation was found between the formation of Si-O-Al linkage and the position of fingerprint peaks in infrared spectra, providing a means to evaluate the extent of geopolymerization. The flexural and tensile properties of the geopolymers were measured at different temperatures, and it was found that the metakaolin-based geopolymers cured at 120 degrees C remained mechanically stable up to 600 degrees C.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Optics
Jeremy Xuan Yu Chew, Zi Heng Lim, Y. Qi, Guangcan Zhou, Guangya Zhou
Summary: Infrared devices are increasingly used in various applications. This paper introduces a novel dispersive spectrometer that has high-throughput and decoupled spectral resolution. The proposed spectrometer utilizes a two-stage Hadamard transform encoding process to increase the signal-to-noise ratio. With a single-pixel detector, the system can be easily implemented in other desired wavelengths. Additionally, a method is developed to remove the need for uniform illumination and improve the ease of device design for in situ measurement.
Article
Polymer Science
Tamilla Mirzayeva, Jana Copikova, Frantisek Kvasnicka, Roman Bleha, Andriy Synytsya
Summary: This study utilized Fourier-transform infrared spectroscopy to screen the chemical composition of dietary supplements containing hyaluronic acid, and successfully quantified hyaluronic acid using various isolation procedures and analytical methods.
Article
Geosciences, Multidisciplinary
Rongfang Qin, Lu Wang, Daiyong Cao, Anmin Wang, Yingchun Wei, Jing Li
Summary: The study revealed significant differences in the chemical structure evolution of vitrinite and inertinite during coalification. The structure parameters of inertinite were consistently larger than vitrinite, while certain parameters were consistently smaller in inertinite compared to vitrinite.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Anthropology
A. Holguin, M. Charles, S. Mithen, R. Schulting
Summary: This paper investigates the conditions under which hazelnut shells can become charred. The study finds that temperature, duration, and oxygen availability are key factors in the charring process. The results of the study can guide future analytical work on hazelnut shells and similar archaeobotanical materials.
JOURNAL OF ARCHAEOLOGICAL SCIENCE
(2022)
Review
Anatomy & Morphology
Ishita Chakraborty, Sintu Rongpipi, Indira Govindaraju, B. Rakesh, Sib Sankar Mal, Esther W. Gomez, Enrique D. Gomez, Ranjan Dutta Kalita, Yuthika Nath, Nirmal Mazumder
Summary: This article reviews the characterization methods for cellulose, including microscopic techniques for morphology and surface topography, as well as analytical techniques for physicochemical properties such as crystallinity, chemical composition, and thermal properties. This is important for the development of using cellulose as a low-cost raw material with anticipated physicochemical properties.
MICROSCOPY RESEARCH AND TECHNIQUE
(2022)
Article
Geochemistry & Geophysics
Sameeksha Mishra, Anup Krishna Prasad, Anubhav Shukla, Arya Vinod, Kumari Preety, Atul Kumar Varma
Summary: The carbon content of different types of coal affects its use in industries and thermal power generation. This study proposes using FTIR spectroscopy data to analyze the carbon content in coal samples as a potential alternative method. The results show that FTIR can accurately determine the carbon content in high-ash coals and has potential applications in various basins for high-ash coals, soil, and shale samples.
Article
Engineering, Civil
Lian Lu, Wei-Xin Ren
Summary: The paper introduces the fractional Fourier transform and proposes the synchrosqueezing fractional Fourier transform to improve the accuracy of instantaneous frequency identification. The method is validated through experiments and numerical examples.
Article
Instruments & Instrumentation
Maria Lucia Protopapa, Emiliano Burresi, Martino Plamisano, Emanuela Pesce, Loredana Latterini, Nicola Taurisano, Giulia Quaglia, Raffaello Mazzaro, Vittorio Morandi
Summary: The research aims to engineer desired molecular sp(2) structures in graphene oxide by controlled oxidation of graphite powder, in order to achieve tunable chemical and microstructural properties for optoelectronics or sensing applications. Experimental results show that different concentrations of potassium permanganate and potassium hydroxide can change the microstructural and chemical properties of GO, leading to significant enhancement of photoluminescence and introduction of additional electronic energy levels for tuning the functional properties of GO.
APPLIED SPECTROSCOPY
(2022)
Article
Engineering, Chemical
Jian Chen, Jiahe Shen, Jie Guo, Geoff Wang
Summary: Vibrating separation is an important method for liquid-solid separation. This study investigated the effect of vibration parameters in separation based on numerical simulation of large-scale liquid bridge breakage. The results showed that separation efficiency increased significantly with the peak acceleration, but growth slowed down after exceeding 1 m/s^2.
Article
Energy & Fuels
Yunsong Yu, Chen Zhang, Chenyang Zhou, Jingfeng Zhang, Zaoxiao Zhang, Geoff G. X. Wang
Summary: The single atom fluid, developed as a new solvent, shows promising performance in capturing CO2, as validated by experiments against the theoretical model. The effects of temperature, pressure, and weight fraction on CO2 capture efficiency are carefully studied and concluded to improve with the use of the advanced solvent.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Engineering, Chemical
Jian Chen, Peipei Wang, Mengran Li, Jiahe Shen, Tony Howes, Geoff Wang
Summary: Research investigated the rupture distance and shape of liquid bridges formed between surfaces with different roughnesses, as well as the redistribution of liquid after rupture. Experiments on smooth surfaces were conducted and a Volume of Fluid model was established for simulating liquid bridge behaviors on rough surfaces. The study further analyzed the effects of contact angle and roughness on rupture distance, shape, and redistribution of the liquid bridge.
MINERALS ENGINEERING
(2021)
Article
Engineering, Chemical
Xiaomei Wu, Maimoona Sharif, Yunsong Yu, Lei Chen, Zaoxiao Zhang, Geoff Wang
Summary: The research group proposed a new CO2 capture method and conducted detailed investigation on the hydrodynamics inside the tower through simulation and experiments, finding that the dual-nozzle opposed impinging spray method outperformed other methods in absorption performance, contributing to enhancing CO2 absorption efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Energy & Fuels
Chen Zhang, Yunsong Yu, Chenyang Zhou, Jingfeng Zhang, Zaoxiao Zhang, Geoff G. X. Wang
Summary: A new solvent GaInSn/PANI/TEMPO was developed to reduce energy consumption in CO2 capture, with the potential of enhanced CO2 desorption. The study utilized density functional theory models and nanoscale mass and energy transfer models to analyze mass and energy transfer in the system.
GREENHOUSE GASES-SCIENCE AND TECHNOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Wei Ju, Zhaobiao Yang, Yulin Shen, Hui Yang, Geoff Wang, Xiaoli Zhang, Shengyu Wang
Summary: In this study, lateral and vertical variations and mechanisms for pore pressure differences in the Permian coal reservoirs of western Guizhou region are analyzed. The results show that lateral pore pressure differences can be delineated into five zones and there are two main typical patterns vertically. Coal permeability, thermal evolution stage, and hydrocarbon generation contribute little to pore pressure differences, while present-day in-situ stress field, basement structure, and tectonic activity play dominant roles. These findings provide new geological references for coalbed methane exploration and development in the western Guizhou region.
FRONTIERS OF EARTH SCIENCE
(2021)
Article
Engineering, Chemical
Jian Chen, Zhenjiang You, Ognjen Orozovic, Geoff Wang
Summary: This paper developed a model based on the Richards equation to quantitatively analyze the effect of oscillation on water distribution in unsaturated coal and iron ores. The findings suggest that the dynamic potential plays a role in the water distribution and can be applied to optimize the processing of coal and iron ores.
Article
Metallurgy & Metallurgical Engineering
Jian Chen, Dongling Wu, Yichao Hu, Yansong Shen, Geoff Wang
Summary: The wear of tuyere in blast furnaces is a common problem in iron-making production. This study developed a computational fluid dynamics model to simulate the abrasion rate on the tuyere surface considering various factors. The results showed that high temperature and severe abrasion mainly occurred on the top surface of the tuyere, and the abrasive rate was influenced by the high-temperature area.
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Chemistry, Physical
Yichao Hu, Yinxuan Qiu, Jian Chen, Liangyuan Hao, Thomas Edward Rufford, Victor Rudolph, Geoff Wang
Summary: Introducing CO2 electrochemical conversion technology to the iron-making blast furnace reduces CO2 emissions and produces H-2 as a byproduct. By considering different injection positions and operating conditions, the efficiency of H-2 utilization can be increased and coke rate can be decreased. However, increasing the hydrogen injection amount results in higher energy consumption.
Article
Materials Science, Multidisciplinary
Zhe Rong, Hongbo Liu, Peng Zhang, Feng Wang, Geoff Wang, Baojun Zhao, Fengqiu Tang, Xiaodong Ma
Summary: This study investigates the formation mechanisms and evolution of complex inclusions in Ti-Ca deoxidized offshore structural steel. The number density of total inclusions generally decreases during the refining process, except for Ti and Ca addition. The major inclusions identified were CaO-Al2O3-SiO2-(MgO)-TiOx and CaO-Al2O3-SiO2. These inclusions originate from the combination of CaO-SiO2-(MgO) in refining slag or refractory and deoxidization product Al2O3 and TiO2. With the refining process and Ca addition, the composition of these inclusions changes, resulting in the promotion of intragranular acicular ferrite.
Article
Nanoscience & Nanotechnology
Sahil Garg, Mengran Li, Tanveer Hussain, Mohamed Nazmi Idros, Yuming Wu, Xiu Song Zhao, Geoff G. X. Wang, Thomas E. Rufford
Summary: We have developed a new strategy to improve the reactivity and durability of a membrane electrode assembly (MEA)-type electrolyzer for CO2 electrolysis to CO. By modifying the silver catalyst layer with urea, we have successfully promoted electrochemical CO2 reduction (CO2R), relieved limitations of alkali cation transport, and mitigated salt precipitation in the gas diffusion electrode. The urea-modified Ag catalyst exhibited significantly better CO selectivity and energy efficiency than the untreated Ag catalyst, and maintained stable performance over 200 hours. Our work provides an alternative approach to fabricating catalyst interfaces in MEAs, with important implications for CO2 electrolysis and fuel cells.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Yuming Wu, Liam Charlesworth, Irving Maglaya, Mohamed Nazmi Idros, Mengran Li, Thomas Burdyny, Geoff Wang, Thomas E. Rufford
Summary: PTFE-embedded GDL can mitigate electrode flooding, increase electrochemical active area, and improve the stable operation time and Faradaic efficiency of CO2 electrolysis to CO.
ACS ENERGY LETTERS
(2022)
Article
Energy & Fuels
Difei Zhao, Yinghai Guo, Geoff Wang, Xin Guan, Xueqing Zhou, Jing Liu
Summary: The influence of high-rank coal's pore characteristics on the physical properties, gas-bearing properties, and exploitation of coal reservoirs is becoming more prominent. This research analyzed the structure and fractal characteristics of reservoir pores in high-rank coal samples and established a natural classification system to describe the relationship between pore types and gas occurrence and transport mechanisms.
Article
Engineering, Chemical
Chen Zhang, Xinhua Xie, Yuan Li, Teng Zhang, Pengfei Ma, Yunsong Yu, Geoff Wang, Yongzhi Zhao
Summary: This work proposes solutions to resolve catalyst deactivation caused by fly ash in SCR denitration systems using a deflector at the economizer outlet and an ash blocking device at the ash hopper outlet. New integrated models are developed to analyze the gas and solid flow field in a SCR reactor, and have been validated by particle image velocimetry experiment. The study finds that the use of curved deflectors effectively improves the distribution of fly ash and shows the best rectification effect.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Physical
Chen Zhang, Chenyang Zhou, Yuan Li, Yunsong Yu, Jingfeng Zhang, Zaoxiao Zhang, Geoff Wang
Summary: New solvents are being explored as effective methods for enhancing reaction rates and reducing reaction energy barriers. The traditional approach for developing new solvents has reached a dead end, leading to the design of a breakthrough technique involving single atom solutions. Experiments have demonstrated the presence of single atoms in the solutions and their charge-producing effects, while a density functional theory model has been used to analyze microscale characteristics. This method has been applied to carbon dioxide capture, resulting in intensified CO2 desorption rates in the single atom solution system by controlling the reaction energy barrier. The results indicate that single atom solutions can generate a maximum voltage of 2.12 V and effectively utilize substantial waste heat below 373 K, contributing to near zero energy consumption.
JOURNAL OF CHEMICAL PHYSICS
(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.