Article
Energy & Fuels
Chao Wang, Huaqing Zhu, Juan Zhang, Zhijun Huang, Jiangang Chen
Summary: A series of Fe-Mn bimetallic catalysts with different pretreatment atmospheres were used for the Fischer-Tropsch synthesis (FTS). The structure of Fe-Mn bimetallic catalysts was analyzed and the effect of different pretreatment atmospheres on reduction efficiency was investigated. It was found that nitrided Fe-Mn catalysts exhibited better stability and higher light olefin selectivity.
Article
Chemistry, Multidisciplinary
Yiqiu Shi, Zhenhua Li, Quanguo Hao, Ruizhe Li, Yuan Li, Lina Guo, Shuxin Ouyang, Hong Yuan, Tierui Zhang
Summary: The study focuses on achieving excellent selectivity towards light olefins in Fischer-Tropsch synthesis by rationally designing and modifying the catalyst surface. Through hydrophobic modification and core-shell structure, the catalyst demonstrated high selectivity for light olefins with a low tendency for CO conversion to CO2.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Zixu Yang, Zhengpai Zhang, Yitao Liu, Xiaoxu Ding, Jun Zhang, Jing Xu, Yifan Han
Summary: Highly dispersed FeMn bimetallic nanoparticles prepared by a low-temperature co-precipitation method were used for direct CO hydrogenation to produce light olefins. The strong interaction between Fe and Mn stabilized the Fe1-xMnxO phase during activation, while Mn decreased the surface energy of nanocrystals and reduced agglomeration, resulting in smaller particle sizes of Mn-promoted catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Green & Sustainable Science & Technology
Higor A. Garona, Fabio M. Cavalcanti, Thiago F. de Abreu, Martin Schmal, Rita M. B. Alves
Summary: This study used Machine Learning models to predict optimal reaction conditions for Fischer-Tropsch Synthesis, showing the efficacy of neural networks in predicting key variables. In comparison to recent studies, this research included more variables in the model such as catalyst support, active phase, and promoters. The Fe-based catalyst showed the highest light olefins selectivity and yield at optimal conditions, despite emitting the most carbon dioxide.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
Zhunzhun Ma, Weixin Qian, Haitao Zhang, Hongfang Ma, Qiwen Sun, Weiyong Ying
Summary: The research found that the effects of magnesium and lithium on the catalyst can enhance CO adsorption, improve FTO activity, weaken carbonization process, increase the selectivity of light olefins, as well as promote CO conversion, and decrease CO2 production.
Article
Chemistry, Multidisciplinary
Iris C. ten Have, Robin Y. van den Brink, Stephane C. Marie-Rose, Florian Meirer, Bert M. Weckhuysen
Summary: Gasification is a process that converts solid waste into gaseous feedstock. This study investigates the possibility of using waste gasification solid residue as a catalyst for producing light olefins. Experimental results show that the catalyst can convert biomass-derived syngas into methane and olefins.
Article
Energy & Fuels
Amin Einbeigi, Hossein Atashi, Seyyed Hossein Zohdi, Ali Akbar Mirzaei, Neda Poudineh
Summary: In this paper, the effects of operating conditions on CO hydrogenation reactions using a gamma-Al2O3 supported Fe-Co bimetallic nanocatalyst were investigated. Statistical-based selectivity models and response surface methodology were used to determine the optimum conditions for maximizing olefin production and minimizing CH4, paraffin, and carbon dioxide production. Increasing H-2/CO ratio, pressure, and temperature resulted in decreased olefin selectivity and increased selectivity for paraffin, CH4, and carbon dioxide. SEM and BET techniques were employed to characterize the catalyst.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Mingquan Li, Aqsa Noreen, Yajie Fu, Cederick Cyril Amoo, Yujia Jiang, Xu Sun, Peng Lu, Ruiqin Yang, Chuang Xing, Shurong Wang
Summary: The study focuses on the direct synthesis of higher olefins (C5+) from syngas using a novel Fe@Na-ZSM-5 composite catalyst, achieving a selectivity of 70% olefins in gasoline. The promotion by Na ions enhances the formation of Fe5C2 phases, facilitating C-C coupling and increasing gasoline and olefins selectivity. Na type zeolite (Na-Zeolite) serves as a unique Na electron promoter, contributing significantly to the development of heterogeneous catalysts and functional materials.
Article
Energy & Fuels
Nawapat Chaipraditgul, Thanapha Numpilai, Chin Kui Cheng, Nuchanart Siri-Nguan, Thana Sornchamni, Chularat Wattanakit, Jumras Limtrakul, Thongthai Witoon
Summary: The presence of transition metals in Fe/K-Al2O3 significantly influences the catalytic performance for CO2 hydrogenation to light olefins. The addition of Cu and Zn increases weakly adsorbed H atoms, resulting in high CO2 conversion and longer chain hydrocarbons. Adding Co enhances CO2 conversion but provides short chain hydrocarbons, while Mn or V inhibits CO hydrogenation and lowers CO2 conversion.
Article
Chemistry, Applied
Hewei Zhang, Haitao Zhang, Weixin Qian, Xian Wu, Hongfang Ma, Qiwen Sun, Weiyong Ying
Summary: In this study, sodium modified Fe-Mn microsphere catalysts were synthesized using one-pot solvothermal method and impregnation. The effects of Mn and Na promoters on the morphology, electronic state and catalytic performance of the catalysts were evaluated. The results showed that Mn promoter enhanced the selectivity of light olefins, while Na promoter improved the catalytic activity.
Article
Energy & Fuels
Zhenxin Liu, Gaopeng Jia, Chenxi Zhao, Yu Xing
Summary: Synthesis of Fe/K catalysts using different ratios of zinc aluminate spinel to alumina and examination of their performance under syngas conversion tests show that catalyst 15%Fe/2% K2O/83%(ZnAl2O4 center dot 1Al(2)O(4)) exhibits impressive values, particularly in terms of olefin/paraffin ratios at a CO conversion of 38.3%.
Article
Chemistry, Applied
Ming Zhao, Jinchang Sun, Xiaohong Li, Qianwen Zhang
Summary: By adjusting the calcination temperature of the alumina supporter and adding S precursors, the catalytic performance of the iron-based catalyst for the direct synthesis of light olefins from syngas can be optimized.
Article
Chemistry, Physical
Xiaoxu Ding, Minghui Zhu, Yi-fan Han, Zixu Yang
Summary: Fe-Mn bimetallic catalysts prepared by different methods showed different catalytic performance and product distribution. Fe4Mn1-SCM catalyst exhibited higher selectivity and stability compared to Fe4Mn1-CP catalyst, which was attributed to the abundant interfacial Fe-MnOx structure.
JOURNAL OF CATALYSIS
(2023)
Article
Energy & Fuels
Ruizhe Li, Yuan Li, Zhenhua Li, Weiqin Wei, Shuxin Ouyang, Hong Yuan, Tierui Zhang
Summary: This study successfully synthesized a novel catalyst of CoMn alloy-loaded MnO using a one-step wet-chemical method, which exhibited good selectivity for light olefins in photothermocatalytic FTS, along with low CO2 selectivity for effective use of carbon resources.
Article
Chemistry, Physical
Hafsa Karroum, Sergey Chenakin, Sergei Alekseev, Viacheslav Iablokov, Yizhi Xiang, Vincent Dubois, Norbert Kruse
Summary: This study presents a one-step-one-pot synthesis of chain-lengthened aliphatic amines and nitriles using potassium-promoted Co/MnOx catalysts, showing that the reaction can be tuned by adjusting the H-2/CO ratio. Additionally, the addition of NH3 strongly favors the formation of chain-lengthened olefins over alkanes.
Article
Chemistry, Applied
Hewei Zhang, Haitao Zhang, Weixin Qian, Xian Wu, Hongfang Ma, Qiwen Sun, Weiyong Ying
Summary: In this study, sodium modified Fe-Mn microsphere catalysts were synthesized using one-pot solvothermal method and impregnation. The effects of Mn and Na promoters on the morphology, electronic state and catalytic performance of the catalysts were evaluated. The results showed that Mn promoter enhanced the selectivity of light olefins, while Na promoter improved the catalytic activity.
Article
Engineering, Chemical
Lin Xu, Kai Zhang, Muhammad A. Nawaz, Dianhua Liu
Summary: The study investigates the carbonylation of ethanol using homogeneous rhodium complex catalysts for the manufacture of propionic acid, with propionic acid as solvent to reduce water content. The effects of ethanol, hydroiodic acid, rhodium, and the pressure of carbon monoxide on reaction rate and selectivity of propionic acid were explored, and a kinetic model was established for the ethanol carbonylation process.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Muhammad Asif Nawaz, Minzhe Li, Maria Saif, Guiyao Song, Zihao Wang, Dianhua Liu
Summary: The alloying of Fe and Co, along with modulation of calcination temperatures and Fe/Mn/Co molar ratios, led to the formation of catalysts with diverse structures and reactivity, thereby improving the efficiency of converting syngas to aromatic hydrocarbons.
Article
Chemistry, Multidisciplinary
Zhunzhun Ma, Hongfang Ma, Haitao Zhang, Xian Wu, Weixin Qian, Qiwen Sun, Weiyong Ying
Summary: In high-temperature Fischer-Tropsch synthesis, the promoting effects of Na and Zr on Fe-based catalysts are mainly reflected in enhanced CO dissociative adsorption, reduced hydrogen adsorption, and increased light olefin selectivity. Na can facilitate the carbonization of catalysts and protect iron carbide, providing more active sites for C-C coupling, while Zr can improve HTFT activity by decreasing hematite crystallite size and stabilizing the active phase.
Article
Energy & Fuels
Maria Saif, Muhammad Asif Nawaz, Minzhe Li, Guiyao Song, Zihao Wang, Chonghao Chen, Dianhua Liu
Summary: Aromatic hydrocarbons are important raw materials for chemicals and have become a research focus in recent years. In this study, a modified FeZnMg catalyst was combined with an HZSM-5 catalyst for direct aromatic synthesis from syngas. The addition of Zn improved the reduction process of Fe oxide, while the addition of Mg enhanced the carburization behavior of Fe species. The synergistic interaction of bimetallic species in the FeZnMg catalyst promoted the formation of Fe carbide and achieved high aromatic selectivity.
Article
Engineering, Chemical
Xiaopei Yang, Guiyao Song, Minzhe Li, Chonghao Chen, Zihao Wang, Huimin Yuan, Zhixiang Zhang, Dianhua Liu
Summary: A bifunctional catalyst composed of Fe2O3 promoted by Na and Cu and hierarchical nanocrystalline HZSM-5 was fabricated, enabling the direct conversion of CO2 to valuable hydrocarbons. The catalyst achieved high aromatic selectivity and excellent catalytic stability in the liquid products.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Chemical
Guiyao Song, Minzhe Li, Lin Xu, Xiaopei Yang, Muhammad Asif Nawaz, Huimin Yuan, Zhixiang Zhang, Xianming Xu, Dianhua Liu
Summary: Selective CO2 hydrogenation to aromatics is achieved using a bifunctional catalyst composed of sodium-promoted FeMnOx and HZSM-5. The catalyst shows high selectivity and conversion rate, and the addition of phosphorus and proximity between sodium and FeMnOx further improves the performance.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Engineering, Chemical
Guiyao Song, Qisheng Jiang, Yangzhou Zhai, Dianhua Liu
Summary: An efficient NaFeMn/HZSM-5 catalyst was synthesized for selective CO2 hydrogenation to aromatics, achieving a high aromatics selectivity of 72% and a CO2 conversion of 45%. The co-existence of Na and Mn was found to promote catalyst reduction and CO2 adsorption, leading to improved catalytic performance.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Energy & Fuels
Yangzhou Zhai, Guiyao Song, Qisheng Jiang, Zihao Wang, Chonghao Chen, Dianhua Liu
Summary: The mesoporous structure of HZSM-5 zeolite facilitates the diffusion and distribution of aromatics, and can enhance the selectivity of aromatics due to adjustable acidity. Catalytic performance testing shows that mesoporous HZSM-5 has high aromatics selectivity and a significant amount of light aromatics.
Article
Energy & Fuels
Xiaoping Wang, Lin Xu, Jianhua Song, Muhammad Asif Nawaz, Dianhua Liu
Summary: Polystyrene-based hybrid solid acids with tunable hydrophobicity and high acid density were prepared by post-synthesis grafting method. The results showed that the catalyst surface property could change from hydrophilicity to hydrophobicity by increasing the organic chain length, which effectively improved the methanol conversion and PODE3-6 selectivity. Moreover, the improvement of hydrophobicity promoted the decrease of local water concentration in the catalyst, facilitating the stabilization of carbocations.
Article
Engineering, Chemical
Qisheng Jiang, Guiyao Song, Yangzhou Zhai, Chonghao Chen, Zihao Wang, Huimin Yuan, Zhixiang Zhang, Dianhua Liu
Summary: Here, we report a composite catalyst composed of Na- and Zn-promoted Fe catalyst (NaZnFe) and highly stable hierarchical nanocrystalline HZSM-5 modified by PEG for CO2 hydrogenation to aromatics. The subtle synergy between Na and Zn in NaZnFe promotes the formation and exposure of active iron species and the conversion of CO2 and intermediates. Additionally, PEG modification of HZSM-5 improves mesoporosity and provides appropriate acidity, resulting in high aromatic selectivity and catalytic stability. The composite catalyst shows high efficiency in the diffusion on hierarchical HZSM-5, intensifying the synergistic effect in the catalytic system. At a CO2 conversion of 42.08%, the composite catalyst suppresses the total selectivity of CO and CH4 to less than 15%, with an aromatic selectivity of up to 63.68% and BTX selectivity in aromatics of up to 56.35%.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Jianhua Song, Xiaoping Wang, Lin Xu, Chonghao Chen, Dianhua Liu
Summary: The efficient homogenous catalysis and spontaneous heterogeneous separation of Pd-catalyzed alkoxycarbonylation have been achieved using a rationally designed natural metabolite based acidic deep eutectic solvent (DES) as an acid co-catalyst. This approach improves the catalyst lifespan and operational efficiency.
Article
Energy & Fuels
Zihao Wang, Minzhe Li, Muhammad Asif Nawaz, Dianhua Liu
Summary: By integrating a Mn-ZnAlOx catalyst with HZSM-5 zeolite, syngas can be efficiently converted to the high value-added product 1,2,4,5-tetramethylbenzene. The study provides deep analysis of the catalyst through various characterization approaches, revealing the synergistic effect of Mn-ZnAlOx and HZSM-5 in promoting the selective synthesis of tetramethylbenzene. Experimental results show that the catalyst exhibits high CO conversion and tetramethylbenzene selectivity, with good stability. Additionally, a trace methanol co-feeding experiment demonstrates the importance of matching between the synthesized zeolite and methyl intermediates for achieving maximum selectivity to tetramethylbenzene.
Article
Chemistry, Physical
Muhammad Asif Nawaz, Maria Saif, Minzhe Li, Guiyao Song, Wang Zihao, Dianhua Liu
Summary: By co-doping Cu and Co metal species under suitable calcination temperature, the catalytic activity of Fe-Co/Fe-Cu bimetallic systems for the conversion of syngas to aromatics was accelerated. The fabrication of highly-tuned CoFe2O4 bimetallic nanocrystals enhanced the adsorption capabilities of the catalytic surface, facilitating the reduction behavior of metal oxides.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Xian Wu, Weixin Qian, Haitao Zhang, Zhonghao Han, Hewei Zhang, Hongfang Ma, Dianhua Liu, Qiwen Sun, Weiyong Ying
Summary: CeO2 nanorods were used as the support for Fe/CeO2 and Fe/CeO2@xMnO(2) catalysts in high-temperature Fischer-Tropsch synthesis of light olefins. The CeO2 support donated electrons to Fe species, promoting CO dissociation, while the synergistic effect between Mn and Ce improved oxygen mobility on the catalyst surface, enhancing selectivity to light olefins. However, excess Mn hindered contact between CeO2 and Fe species, impacting electron transfer and reducing CO conversion rates. The best hydrocarbon distribution for light olefins was achieved over the Fe/CeO2@0.2MnO(2) catalyst.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
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.