Article
Chemistry, Physical
Jun Hee Jang, David G. Brandner, Reagan J. Dreiling, Arik J. Ringsby, Jeremy R. Bussard, Lisa M. Stanley, Renee M. Happs, Anjaneya S. Kovvali, Joshua I. Cutler, Tom Renders, James R. Bielenberg, Yuriy Roman-Leshkov, Gregg T. Beckham
Summary: Reductive catalytic fractionation (RCF) is an effective method for selectively extracting and depolymerizing lignin from biomass. Multi-pass flow-through RCF reduces solvent demand without compromising delignification and monomer yield.
Article
Agricultural Engineering
Bochao Yan, Xiaoyu Lin, Zhihui Chen, Qinjie Cai, Suping Zhang
Summary: A non-precious carbon-based metal-Mo2C catalytic system has been developed for the selective production of phenolic monomers from organosolv lignin depolymerization. The optimized Ni-Fe-Mo2C catalyst achieved high liquefaction and phenolic monomer yields in a water-methanol solvent. The results demonstrate the potential of the Ni-Fe-Mo2C catalytic system for valuable phenolic monomer production from lignin under mild conditions.
BIORESOURCE TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
W. Arts, K. Van Aelst, E. Cooreman, J. van Aelst, S. van den Bosch, B. F. Sels
Summary: Lignin-first reductive catalytic fractionation (RCF) is a cost-effective and environmentally friendly biorefinery technology. By recycling the reaction liquor and solvent, the process achieves a drastic reduction of costs and CO2 footprint. The results of coupled techno-economic analysis and life cycle assessment show that high liquor recycling leads to lower minimum selling price of the lignin oil and global warming potential.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Daniel Vincent Sahayaraj, A. Lusi, Emma M. Mitchell, Xianglan Bai, Jean-Philippe Tessonnier
Summary: The solvolysis of industrial corn stover lignin in methanol and ethanol was carried out to deconstruct lignin into monomers and small oligomers using various reactor configurations. The use of flow-through reactor systems proved to be more effective in achieving higher yields of monomers and solvent-soluble products. Furthermore, subsequent upgrading of the deconstructed fractions through fast pyrolysis resulted in increased phenolic monomer yield and decreased char formation.
Article
Chemistry, Physical
Yuting Zhu, Yuhe Liao, Luying Lu, Wei Lv, Jing Liu, Xiangbo Song, Jingcheng Wu, Lei Li, Chenguang Wang, Longlong Ma, Bert F. Sels
Summary: CuO nanoparticles were used to oxidatively fractionate lignocellulose with O2 in aqueous NaOH, achieving over 80% carbon efficiency. Lignin was converted into aromatic aldehyde monomers, while hemicellulose transformed into water-soluble small acids. Up to 80% cellulose with high purity (>95%) was obtained through this process, which has potential applications in materials and chemicals production.
Article
Chemistry, Physical
Yuzhen Hu, Song Li, Xuelai Zhao, Chenguang Wang, Xinghua Zhang, Jianguo Liu, Longlong Ma, Lungang Chen, Qi Zhang
Summary: The aim of this study is to investigate the reaction pathway for the conversion of lignin to aldehydes and the stabilization of aldehyde products in alkaline media. Over-oxidation to carboxylic acids and condensation were found to be crucial factors limiting the yield. A chemical protection method using aniline as the capping agent achieved the theoretical maximum monomer yield within 30 minutes at 160 degrees Celsius.
CATALYSIS COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Filippo Brienza, Korneel Van Aelst, Francois Devred, Delphine Magnin, Bert F. Sels, Patrick Gerin, Iwona Cybulska, Damien P. Debecker
Summary: This study investigated the role of hydrogen gas in the reductive catalytic fractionation (RCF) of wheat straw biomass. It was found that hydrogen gas can enhance lignin depolymerization and increase the yield of phenolic monomers. In the presence of hydrogen gas, the yield of phenolic monomers increased from approximately 12 wt% to 25 wt% of acid-insoluble lignin in the initial biomass. Additionally, using ethanol as a hydrogen-donor solvent resulted in the highest yield of monophenolic compounds.
Article
Energy & Fuels
Dandan Wang, Xinyu Lu, Haoquan Guo, Pengcheng Xiu, Jiajia Chen, Yu Qin, Hossain Mahmud Robin, Chaozhong Xu, Xiaoli Gu
Summary: In this study, a Ni-W/ZrP catalyst was used to depolymerize alkali lignin, with formic acid acting as an internal hydrogen donor, resulting in the conversion of lignin to phenolic monomers. The highest oil yield was obtained at 240 degrees C, and the presence of formic acid enhanced the conversion of lignin. The catalyst (Ni-W)(20)/ZrP showed good selectivity for phenolic products and could be recycled without significant activity loss.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Chemistry, Multidisciplinary
Hang Dao Thi, Korneel Van Aelst, Sander Van den Bosch, Rui Katahira, Gregg T. Beckham, Bert F. Sels, Kevin M. Van Geem
Summary: Thorough characterization of lignin oil from pine wood using GC x GC analysis revealed the composition, structure, and content of monomers, dimers, and trimers, with a focus on the identification of inter-unit linkages and end-units. Different fractions of the RCF oil showed significant variations in structural motifs, with more polar solvent-extracted lignin fractions containing higher molecular weight fragments and more hydroxyl-containing motifs. The findings of individual dimer and trimer molecules by GC x GC aligned well with recent H-1-C-13 HSQC NMR spectroscopy results, demonstrating the complementarity of both techniques for a comprehensive understanding of lignin structures.
Article
Chemistry, Applied
Kai Wu, Yushuai Sang, Saravanan Kasipandi, Yiming Ma, Hairui Jiao, Qingfeng Liu, Hong Chen, Yongdan Li
Summary: In this study, depolymerization of enzymatic hydrolysis lignin (EHL) was carried out using one-step hydrothermal-synthesized MoS2 in ethanol without hydrogen gas. Value-added aromatic molecules, mainly alkyl-substituted phenols (A-Ps), were obtained without the formation of char or tar. The highest aromatic monomer yield of 226.4 mg/g EHL was achieved over the MoS2 prepared with thioacetamide and sodium molybdate as precursors (STA-MoS2) at 320 degrees C for 12 h. Proper ratios of Mo6+/Mo5+ and (Mo6++Mo5+)/Mo4+ on the surface of MoS2 catalysts were found to be significant for attaining high overall aromatic monomer yield. MoOxSy species with Mo5+ and S22- was proposed as the active site for the production of complex alkyl phenols via demethoxylation and alkylation. Carbon deposition and exchanges of sulfur and oxygen atoms resulting from oxidation are likely responsible for catalyst deactivation.
Article
Chemistry, Analytical
Ningning Zhou, Jie Yang, Xin Lu, Zhong Xin, Chunbao Xu, Quan (Sophia) He
Summary: The amount of formic acid is crucial in influencing product yields. Acidic extraction conditions benefit product recovery and improve product quality.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Chemistry, Multidisciplinary
Xu Du, Andrew W. Tricker, Weisheng Yang, Rui Katahira, Wei Liu, Thomas T. Kwok, Parikshit Gogoi, Yulin Deng
Summary: In this study, a new oxidative catalytic fractionation (OCF) process using polyoxometalate (POM) as the only catalyst was developed to depolymerize lignin to lignin-derived chemicals (LDCs). The process involved methoxylation of lignin followed by heating to convert a significant portion of lignin to LDCs, including a high content of aromatic monomers (45.9%). This provides an efficient and novel method for the utilization of lignin.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Energy & Fuels
Pengcheng Xiu, Xinyu Lu, Dandan Wang, Jiajia Chen, Chaozhong Xu, Xiaoli Gu
Summary: This paper investigates the best Ni-Fe ratio of bimetallic catalysts for the depolymerization of alkaline lignin. The catalysts were prepared by the chemical reduction method and their properties were studied. The results show that the catalyst with a Ni:Fe ratio of 1:1 has the highest yield of bio-oil and phenolic monomers. The catalysts also exhibit high selectivity and stability in the depolymerization process.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Chemistry, Multidisciplinary
Filippo Brienza, Korneel Van Aelst, Francois Devred, Delphine Magnin, Bert F. Sels, Patrick A. Gerin, Iwona Cybulska, Damien P. Debecker
Summary: This study examines the reductive catalytic fractionation (RCF) process of wheat straw and finds that Ru/C catalyst performs better and high-temperature treatment can increase the yield of lignin and monophenolics.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Tianyu Ren, Zhaofeng Zhang, Shengping You, Wei Qi, Rongxin Su, Zhimin He
Summary: This study presents an easy method for the isolation and purification of two representative lignin monomers, 4-propylguaiacol and 4-propylsyringol, with high GC purities from the products of reductive catalytic fractionation processes.
Article
Chemistry, Applied
Ye Wang, L. Li, Chaojun Cui, Patrick Da. Costa, Changwei Hu
Summary: Ni-Zr catalysts modified by Aluminum and Manganese showed improved dry reforming of methane performance at high temperatures, with reduced carbon deposition, due to the promotion of CO2 activation by a higher amount of basic sites and smaller nickel particle size.
Article
Engineering, Chemical
Yexin Hu, Yanru Zhang, Xing Fu, Dianyong Tang, Hui Li, Ping Hu, Liangfang Zhu, Changwei Hu
Summary: The presence of NaCl in water inhibits the degradation of fructose and reduces the formation of unwanted byproducts, but promotes the formation of soluble humins.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Shuai Luo, Yanmei He, Rongzhen Cui, Caixia Fu, Shi-Jian Su, Liang Zhou, Zhiyun Lu, Yan Huang, Yu Liu, Changwei Hu
Summary: Replacing the double-component intermolecular exciplex host with its single-component counterpart not only simplifies the device fabrication process but also improves the electroluminescence performance and thermal stability of FOLEDs.
ORGANIC ELECTRONICS
(2022)
Article
Green & Sustainable Science & Technology
Yuan Xiao, Shengqi Liao, Shuguang Xu, Jianmei Li, Zhiyun Lu, Changwei Hu
Summary: In this study, we developed a dealuminized ZSM-5 loaded erbium catalyst, which exhibited outstanding activity for lactic acid production. The catalyst could selectively convert xylose and glucose to lactic acid. The pretreatment using HNO3 successfully removed partial aluminum in the catalyst, leading to increased surface areas and promoted dispersion of erbium species, resulting in enhanced catalytic activity.
Article
Chemistry, Physical
Xiangze Du, Xiaomei Lei, Linyuan Zhou, Yong Peng, Yan Zeng, Huiru Yang, Dan Li, Changwei Hu, Hermenegildo Garcia
Summary: This study discovers that bimetallic Ni-Mo nitrides can be obtained by a non-nitridation method and serve as efficient catalysts for the hydrodeoxygenation reaction in the production of liquid fuels from biomass. The Ni3Mo3N samples show high selectivity and activity in the hydrodeoxygenation of palmitic acid, and they can be recycled with slight decay in catalytic activity.
Article
Chemistry, Physical
Shuai Fu, Dan Li, Tinghao Liu, Lijuan Liu, Huaqing Yang, Changwei Hu
Summary: The Ni/P ratio of nickel phosphide significantly affects the catalytic performance in the conversion of fatty acids to biofuel. The Ni12P5 cluster exhibits higher catalytic activity compared to the Ni12P6 cluster.
Article
Thermodynamics
Yingdong Zhou, Javier Remon, Jesus Gracia, Zhicheng Jiang, Jose Luis Pinilla, Changwei Hu, Isabel Suelves
Summary: This study explores the use of "sea-thermal" treatment of the microalgae Chlorella Vulgaris to produce energy-dense biofuels and value-added liquid products. The processing conditions and reaction medium were found to significantly affect the yields and properties of the products. Low temperatures and short reaction times favored the formation of biocrude, while high temperatures and prolonged processing times promoted the repolymerization of the biocrude to hydrochar. The salinity of the seawater also played a role in these transformations.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
Xiaomei Lei, Hui Xin, Xiangze Du, Huiru Yang, Yan Zeng, Linyuan Zhou, Chao Juan, Hualong Zhang, Dan Li, Changwei Hu
Summary: This study successfully enhanced the hydrodeoxygenation performance of Mo2N catalysts for jatropha oil conversion by synthesizing Ni-Mo2N/gamma-Al2O3 catalyst, resulting in high-quality biofuel.
Article
Agricultural Engineering
Xudong Liu, Mingyu Xie, Yexin Hu, Si Li, Suli Nie, Aihua Zhang, Hong Wu, Changzhu Li, Zhihong Xiao, Changwei Hu
Summary: This study investigated the water-organic co-solvent for the fractionation of lignin in camellia oleifera shell and the fabrication of lignin nanoparticles. The research found that the highest dissolution of lignin was achieved in H2O/GVL co-solvent, and the LNPs prepared from H2O-ethanol co-solvent showed the smallest particle size and the highest stability. The structural analysis revealed that the lignin nanoparticles maintained their basic structural units.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Chemistry, Analytical
Yichen Liu, Wenli Wang, Yue Wang, Longfei Liu, Guiying Li, Changwei Hu
Summary: The effects of dilute sulfuric acid pretreatment on the pyrolytic behaviors of different biomasses were studied. The pretreatment increased cellulose degradation temperature and decreased bio-char yield. Specific small molecular products were found in the bio-oil. The production of lignin-derived compounds increased for rice straw, while decreased for willow and cypress. Pretreatment also promoted the production of oligomers.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Chemistry, Analytical
Yue Wang, Christian Wurzer, Wenli Wang, Yichen Liu, Longfei Liu, Xiaoyan Lv, Ondrej Masek, Changwei Hu
Summary: Pyrolysis of pubescens pretreated by torrefaction was investigated through one-step and stepwise processes. Stepwise processing yielded higher cumulative yield of small molecular compounds, including monosaccharides, carboxylic acids, furans, and monophenols, compared to one-step pyrolysis. Different temperature ranges affected the production of different compounds.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Chemistry, Multidisciplinary
Xiangze Du, Lu Peng, Jiajun Hu, Yong Peng, Ana Primo, Dan Li, Josep Albero, Changwei Hu, Hermenegildo Garcia
Summary: This study reports efficient and selective electrocatalysts for CO2 reduction to CO using Cu and Fe nanoparticles supported on a porous N-doped graphitic carbon matrix. The material exhibits high activity and faradaic efficiency at the optimum Fe/Cu ratio of 2.
Article
Chemistry, Applied
Xiangze Du, Rui Zhang, Dan Li, Changwei Hu, Hermenegildo Garcia
Summary: The present energy dilemma has prompted researchers to search for new renewable energy sources with minimal CO2 emissions. Producing biofuels and platform chemicals from sustainable biomass resources is of great significance, but developing high-efficiency catalysts remains a key scientific challenge. Transition metal carbides, particularly molybdenum carbide, have shown promising performance in biomass conversion. Recent developments in preparing molybdenum carbide as a catalyst in biomass to fuel conversion, focusing on preparation methods, structure-dependent effects, and electronic modulation, are summarized in this review. The controllable selective cleavage of C-C, C-O, and C-H bonds over modified molybdenum carbides is highlighted. The review also presents possible deactivation mechanisms of molybdenum carbide, providing systematic and fundamental information for further design and development in biomass conversion.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Engineering, Environmental
Ting He, Liangwei Deng, Bo Lai, Shuguang Xu, Lan Wang, Yunhong Zhang, Dan Zheng, Changwei Hu
Summary: Fulvic acid, as a model representing bio-refractory soluble organic matter, was treated with a combination of FeSO4 and Ca(ClO)(2) in advanced wastewater treatment. The results showed that the synergistic effect of Fe2+ and ClO- greatly enhanced the removal efficiency of fulvic acid, indicating the involvement of an advanced oxidation process. Oxidation and coagulation played crucial roles in the removal of fulvic acid.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Shanshan Feng, Xudong Liu, Zhishan Su, Guiying Li, Changwei Hu
Summary: In this study, Ru/SBA-15 catalysts were prepared and used for the production of cyclohexanols from lignin-derived phenols. The catalyst showed excellent hydrogenation activity, stability, and demethoxylation activity. The reaction rate of the catalyst was zero-order at 80℃, with a low activation energy.
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.