Article
Energy & Fuels
Xiuhua Li, Fang He, Frank Behrendt, Zhenqiang Gao, Junrui Shi, Chengyu Li
Summary: This study investigates the interaction between potassium chloride (KCl) and potassium sulphate (K2SO4) in biomass ashes, and the effect of eutectic melting on the evaporation of KCl. The results show that the evaporation rate of KCl is significantly inhibited by K2SO4, and this rate is approximately proportional to the partial pressure of KCl in mixtures of KCl + K2SO4.
Article
Chemistry, Multidisciplinary
Xiuhua Li, Fang He, Frank Behrendt, Alba Dieguez-Alonso, Haiquan Sun, Hailiang Wang
Summary: This study experimentally confirmed that the vapor pressure of KCl increases when its molar fraction in KCl + K2SO4 mixtures ranges from 0.05 to 0.20, and the evaporation of KCl is inhibited by K2SO4 when its molar fraction exceeds 0.27.
Article
Engineering, Chemical
Lei Deng, Jiahao Jiang, Yuan Tie, Shihao Ma, Gaofeng Fan, Tao Zhu, Defu Che
Summary: This study investigates the transformation and release of fuel K during the combustion of corn stalk and wheat straw. The results show that corn stalk has a lower K release compared to wheat straw, and the combustion temperature has a greater influence on K release than oxygen concentration. Different forms of inorganic potassium are observed at different combustion temperatures.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Thermodynamics
Haigang Zhang, Zhongjie Shen, Jianliang Xu, Qinfeng Liang, Zhenghua Dai, Haifeng Liu
Summary: This study investigated the migration behavior and influence of potassium on the combustion of coal/biomass char particles on the slag surface using visualization experiments and surface analytical techniques. The results showed that the addition of potassium accelerated the combustion process of coal char particles on the slag surface, while inhibiting the combustion of biomass char particles.
COMBUSTION AND FLAME
(2023)
Article
Energy & Fuels
Georg Albert Rupert Archan, Robert Scharler, Markus Buchmayr, Norbert Kienzl, Christoph Hochenauer, Johann Gruber, Andres Anca-Couce
Summary: A novel biomass combustion technology was investigated, which achieved low NOX and particle matter emissions with high fuel flexibility and no slagging. The study focused on minimizing inorganic particulate matter emissions and understanding the processes of inorganic matter release within the fixed bed. Results showed that the technology effectively retained K in the fixed bed, reducing particulate matter emissions.
Article
Energy & Fuels
Qian Liu, Wenqi Zhong, Zuowei Yu, Jun Zhou
Summary: Recent advances in torrefaction pretreatment technologies have the potential to improve biomass storage, transportation, and combustion. However, high alkali metal content in biomass can still cause issues such as ash deposition, slagging, and corrosion on the boiler heating surface, which torrefaction pretreatment does not address. This study investigated the effects of different additives on the release and transformation of potassium during biomass combustion. The results showed that phosphoric acid additives had the best effect, followed by silicon-aluminum additives, in limiting the release of potassium from torrefied wheat straw.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Energy & Fuels
Feng Zhang, Xiuqin Hou, Xingchang Xue, Jiyun Ren, Lingxiao Dong, Xumeng Wei, Lin Jian, Lei Deng
Summary: In this study, experimental investigations were carried out on three typical biomass fuels in a fixed-bed reactor to examine the release characteristics of potassium during biomass combustion. The effects of fuel type, combustion temperature, exposure time, oxygen concentration, and water-washing pretreatment were evaluated. The results showed that the release ratio of K in corn straw increased with exposure time at temperatures between 700 and 900 ?. Water washing significantly reduced the ratio and amount of K release from corn straw during combustion.
Article
Energy & Fuels
Miao Wang, Deliang Xu, Yonghui Bai, Guangsuo Yu, Junxian Zhang, Shoujun Zhang, Jie Xu, Hong Zhang, Shu Zhang, Juntao Wei
Summary: The migration and transformation characteristics of potassium (K) during the combustion process of rice straw char under different O2 concentrations were studied. It was found that most of the K in rice straw char is water-soluble K, which can be transformed into NH4Ac-soluble K and HCl-soluble K. The increase of O2 concentration promotes the transformation of water-soluble K. However, no reaction to form K-aluminosilicate was observed during the combustion process at 400 degrees Celsius. It was concluded that water-soluble K is the key form affecting the combustion characteristics of rice straw char.
Article
Energy & Fuels
Meirong Dong, Fasheng Luo, Shishi Li, Gangfu Rao, Jidong Lu
Summary: This study analyzed the release of alkali metals (K and Na) during the combustion of different solid fuels using CO2 laser ignition technology and flame spontaneous emission spectroscopy. The temporal and spatial distribution characteristics were investigated, and the influence of atmospheres on the release behavior was examined. The results showed that the release intensity of K atoms during the combustion process was more uniform in the O-2/CO2 atmosphere compared to the O-2/N-2 atmosphere. The release time of K atoms was longer and the flame height decreased more gradually during coal combustion. Additionally, the peak release of potassium increased with higher oxygen concentration.
Article
Energy & Fuels
Kuangyu Li, Weijie Yan, Xianliang Huang, Lingbo Yu, Yumin Chen, Chun Lou
Summary: The method described uses K concentration, temperature, and characteristic spectral line radiation intensity in flame for calibration and establishes a radiation function model. It can be applied to measure K concentration and diagnose combustion processes, such as comparing K release concentrations and combustion temperatures of different fuels during volatile and char combustion stages.
Article
Energy & Fuels
Emil O. Lidman Olsson, Daniel Schmid, Oskar Karlstrom, Kasper Enemark-Rasmussen, Henrik Leion, Songgeng Li, Peter Glarborg, Kim Dam-Johansen, Hao Wu
Summary: Biomass can be converted into heat, power, and biofuels through thermal conversion processes, but the presence of phosphorus in certain types of biomass can lead to operational or environmental issues when released. The mechanisms behind phosphorus release and high-temperature phosphorus chemistry need to be understood in order to efficiently recover phosphorus from biomass residues. This study investigated the release of phosphorus from wheat bran char and sunflower seed char under various gas environments and temperatures.
Article
Soil Science
Mahdi Najafi-Ghiri, Hamid Reza Boostani
Summary: Prescribed burning of plant residues in agricultural lands may increase surface soil temperature and change the dynamics of soil potassium. Heating soil to 350 degrees Celsius can cause combustion of organic matter, partial destruction or collapse of K-bearing minerals, and increased release of potassium.
SOIL USE AND MANAGEMENT
(2021)
Article
Energy & Fuels
Yu Yang, Yali Shao, Shiwei Ma, Ping Li, Tao Song
Summary: Oxygen Carrier Aided Combustion (OCAC) is a process that improves combustion efficiency by using oxygen carrier particles. This study found that red mud is a potential low-cost oxygen carrier and investigated the interaction mechanism between organic and inorganic potassium and red mud oxygen carriers, as well as their effect on particle agglomeration.
Article
Energy & Fuels
Guoliang Wang, Jesper Naimi Funch Poulsen, Samira Naimi Funch Poulsen, Peter Arendt Jensen, Flemming Jappe Frandsen
Summary: The Danish wheat straw, rich in K and Cl, is the most problematic fuel in terms of deposit formation, while milled wood pellets, leaves, and bark have lower deposition propensities. The addition of K-capture additives significantly reduces the deposition propensity of wheat straw combustion, but has little effect on wood pellet combustion.
Article
Energy & Fuels
Shusen Wang, Chun Zou, Chun Lou, Haiping Yang, Tong Jiang, Cong Wang, Haofan Wang
Summary: This study aims to investigate the synergistic effects between lignin, hemicellulose, cellulose, and potassium on the combustion behaviors of biomass at high heating rate conditions. The results show that the increase in cellulose content leads to an increase in the ignition delay time and char ignition delay time when the cellulose content is less than 41%, but a significant decrease when the cellulose content is more than 41%. The catalysis of potassium promotes the synergy between cellulose and lignin, leading to enhanced homogeneous ignition.
Article
Engineering, Environmental
Chao Liu, Kui Wang, Xinpeng Zhao, Zhijun Chen, Xiaoyan Yin, Tingting Cai, Xiaolei Zhang, Junming Xu, Jun Hu, Xianzhi Meng, Arthur J. Ragauskas, Jianchun Jiang
Summary: Integrated lignocellulosic biorefineries have the potential to convert all components of lignocellulosic biomass into valuable products. However, the challenge lies in the recalcitrance of lignocellulose, making the conversion process technically and economically challenging. This study proposes a sustainable and profitable strategy for lignocellulose fractionation and conversion, with the potential for high revenue.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Feng Long, Shiyu Wu, Yuwei Chen, Xincheng Cao, Jiaping Zhao, Peng Liu, Jianchun Jiang, Xiaolei Zhang, Junming Xu
Summary: In this research, a series of Ni3Fe catalysts were synthesized to improve the transformation of fatty acids into fatty alcohols. The Ni3Fe anchored on TiO2 surface exhibited excellent catalytic activity with a high alcohol yield of 91.2%. Both experimental and DFT computational results indicated that the interactions between Ni3Fe nanoparticles and R-TiO2 support promoted the formation of oxygen vacancy, which played a vital role in the hydrogenation towards fatty alcohols.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Energy & Fuels
Jakub Mularski, Jun Li
Summary: Exploiting biomass energy is a promising option to reduce CO2 emissions due to its renewability and carbon neutrality. This review investigates the ignition characteristics of biomass dust fuels, focusing on critical fuel properties and reactor conditions that affect ignition delay and mode. It also covers biomass combustion modeling methods and their capabilities, similarities, and drawbacks in terms of ignition prediction.
Article
Geochemistry & Geophysics
Yan Xi, Jun Li, Wei Lian, Haifeng Fu, Yue Qi, Yudong Tian
Summary: Through experiments on oil shale samples obtained from Jimsar Sag in the Junggar Basin in China, it was found that increasing the thermal treatment temperature led to a continuous increase in porosity and permeability, but with different patterns. A nonlinear correlation was observed between porosity and movable fluid saturation, while permeability showed an approximately linear correlation with movable fluid saturation.
Article
Engineering, Environmental
Guanchu Lu, Zhe Wang, Zongyang Yue, Wenjing Wei, Yi Huang, Xiaolei Zhang, Xianfeng Fan
Summary: The high energy consumption of aqueous amine absorbents hinders their global deployment for carbon dioxide capture. Non-aqueous amine systems provide energy-efficient alternatives, but are prone to precipitation during the absorption process. This study combines experimental and theoretical approaches to investigate the factors influencing precipitation and the effectiveness of different solvents. Based on these findings, novel non-aqueous absorbents have been developed to improve CO2 absorption and desorption performance, resulting in reduced energy consumption.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Jakub Mularski, Leo Lue, Jun Li
Summary: This paper aims to develop a robust zero-dimensional ignition model as an effective tool to quickly estimate the ignition behaviour of biomass fuels. The model is able to accurately distinguish ignition behaviours of different biomass fuels, enabling its use in wider industrial applications.
Article
Chemistry, Physical
Robert Price, Lewis MacDonald, Norman Gillies, Alasdair Day, Edward Brightman, Jun Li
Summary: This study investigates the potential of converting whisky co-products into hydrogen using a novel two-stage electrolysis process. The results show that draff and pot ale are the most suitable feedstocks for hydrogen production, while spent lees cannot be digested and electrolyzed due to their low biomass content.
FARADAY DISCUSSIONS
(2023)
Article
Energy & Fuels
Gang Lei, Liang Xue, Qinzhuo Liao, Jun Li, Yang Zhao, Xianmin Zhou, Chunhua Lu
Summary: In this study, experimental tests were conducted on 43 artificial argillaceous sandstone samples to evaluate the porosity and permeability relations under stress dependence. An analytical model was proposed to explain the experimental results. The analysis results showed that the porosity-permeability relationship in argillaceous porous media (APM) is influenced by factors such as clay volume content, effective stress, initial irreducible water saturation, rock lithology, and pore structure parameters.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Hui Zhang, Kerou Liu, Jun Li, Kuangsheng Zhang, Yangyong Ou, Zongyu Lu, Jiangang Shi, Zhixiang Cai, Yufei Chen
Summary: By studying the stepped discharge modes of cyclic electrohydraulic shockwaves, it was found that mode 7 and mode 6 performed the best in different aspects. This provides a new idea for the development of this technology and effectively promotes its field application.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Energy & Fuels
Geng Zhang, Hongwei Yang, Jun Li, Gonghui Liu, Honglin Huang, Wang Chen
Summary: This paper proposes a gas-liquid-solid non-isothermal transient flow model that considers the coupling relationships between hydrate decomposition, and heat and mass transfer in multiphase flow. The model's accuracy in predicting gas void fraction, friction pressure, and wellbore temperature is validated using experimental and field data. The study investigates the influence of seawater salinity on gas-liquid-solid flow behaviors and finds that increasing seawater salinity leads to larger decomposition area and rate of hydrate in the wellbore. Additionally, increasing wellhead backpressure and lowering inlet temperature of seawater effectively control the amount of hydrate decomposed.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Physical
Feng Long, Shiyu Wu, Haitian Chen, Shuya Jia, Xincheng Cao, Peng Liu, Yanju Lu, Jianchun Jiang, Xiaolei Zhang, Junming Xu
Summary: Ni3Fe clusters anchored on rutile were synthesized through different methods and investigated for hydrogenation of fatty acid into alcohol. The catalyst with the highest specific surface area and best dispersion exhibited the best hydrogenation activity. The electron distribution and strength of the metal-support interaction can affect the adsorption of H and acids towards fatty alcohol production.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Bidesh Mondal, Xiaolei Zhang, Sumit Kumar, Feng Long, Nirmal Kumar Katiyar, Mahesh Kumar, Saurav Goel, Krishanu Biswas
Summary: The demand for carbon-free energy sources has made the use of hydrogen (H2) gas increasingly important, but its explosive nature raises safety concerns. Researchers have developed a hydrogen gas detection sensor using high-entropy alloy nanoparticles, which shows high selectivity and sensitivity. By decorating the 2D MoS2 surface with these nanoparticles, the sensor can effectively adsorb and dissociate H2 gas, thereby improving its performance.
Article
Biochemistry & Molecular Biology
Qiaolong Zhai, Shaoqi Yang, Shuheng Zhao, Jianjun Hu, Yanju Lu, Xiaolei Zhang
Summary: This study compared the dissolution of lignin in different acid hydrotropes and found that 4-HSA is the most efficient solvent. The analysis of molecular mechanism revealed that higher absorb free energy of 4-HSA and p-TsOH complex with VG contributed to a higher efficiency of lignin dissolution. The content of beta-O-4 bonds in the extracted lignin varied among the four acid hydrotropes at the same level of lignin removal and was influenced by the acidity and critical aggregation concentrations of acid hydrotropes.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Mengyu Cao, Shibo Shao, Wenjing Wei, Jason B. Love, Zongyang Yue, Yiming Zhang, Xiaolei Zhang, Yuxiang Xue, Jialin Yu, Xianfeng Fan
Summary: This study developed a photocatalytic system using g-C3N4 as a catalyst for the cleavage of lignin C-C bonds. The optimized electronic structure of g-C3N4 achieved improved catalytic activity and selectivity. These findings provide valuable insights for the design of efficient photocatalytic systems for lignin conversion.
APPLIED SURFACE SCIENCE
(2024)
Article
Engineering, Environmental
Shuangmei Han, Xiaolei Zhang, Ruizhen Wang, Kui Wang, Jianchun Jiang, Junming Xu
Summary: This research investigates the electrocatalytic hydrodeoxygenation (ECH) of lignin model compounds and lignin-derived oil, achieving the conversion into (alkyl)-cyclohexane and (alkyl)-cyclohexanol. The results show that G-type compounds are more easily hydrodeoxygenated than S-type compounds, and the allyl group has a negative effect on the electrocatalytic conversion. Furthermore, complete conversion of lignin-derived oil from pine and poplar is achieved.
CHEMICAL ENGINEERING JOURNAL
(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.