Article
Energy & Fuels
Maham Tauseef, Abeera Ayaz Ansari, Asif Hussain Khoja, Salman Raza Naqvi, Rabia Liaquat, William Nimmo, Syed Sheraz Daood
Summary: The in-depth thermodynamic and kinetic synergistic effects of coal and rice husk blends on co-pyrolysis for bioenergy production were investigated. The study determined the thermokinetic rate parameters for different reaction models and identified the prominent degradation temperature ranges for the co-pyrolysis reactions. The results showed that the increase of rice husk proportion in coal affected the activation energy and enthalpy values differently in different stages. The co-pyrolysis and co-gasification experiments revealed the potential applications of the obtained products, including honeycomb structure biochar samples and gas compositions.
Article
Chemistry, Multidisciplinary
Zhiyuan Zhang, Lilin Zhang, Yin Liu, Mingxu Lv, Peibo You, Xutao Wang, Hengtao Zhou, Jing Wang
Summary: A comprehensive study was conducted on the co-gasification characteristics of sewage sludge and high-sodium coal. The results showed that as the gasification temperature increased, the CO2 concentration decreased and the concentrations of CO and H2 increased. The change in CH4 concentration was not obvious. The co-gasification of sewage sludge and high-sodium coal exhibited a synergistic effect, promoting the gasification reaction positively. The optimum coal blending ratio was found to be 0.6 according to both fluidized-bed gasification and thermogravimetric analyzer gasification. These findings provide a theoretical basis for the industrial application of sewage sludge and high-sodium coal co-gasification.
Article
Engineering, Environmental
Po-Chih Kuo, Zhuang Sun, Faruk Ozdemir, Muhammad Aziz, Wei Wu
Summary: This study explores the CO2-assisted chemical looping gasification and co-gasification process of lignocellulosic biomass components using iron oxide oxygen carriers. The experimental results show that the presence of iron oxide oxygen carriers accelerates the reaction kinetics and leads to the reoxidation behavior of iron oxide, especially for lignin. The findings also indicate a significant synergistic interaction during the CO2-assisted chemical looping co-gasification process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Analytical
Saartjie M. Gouws, Marion Carrier, John R. Bunt, Hein W. J. P. Neomagus
Summary: The co-utilization of torrefied biomass and coal in thermochemical conversion technologies results in the production of high quality oil products through synergistic reactions, which are controlled by pressure to indirectly influence reaction rates. The removal of hemicellulose during torrefaction enhances hydrogen transfer potential and suppresses dehydration and condensation reactions during co-pyrolysis, leading to substantial changes in product distribution.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Thermodynamics
Krishna Kant Dwivedi, A. K. Pramanick, M. K. Karmakar, P. K. Chatterjee
Summary: This work conducted a comprehensive and systematic study on the synergistic effect and kinetics of different coal ranks and biomass materials. Kinetic parameters were estimated using thermogravimetric analysis and validated using an Artificial Neural Network model. Various model-free methods were used to estimate kinetic and thermodynamic parameters. Results showed inhibitive interactions between waste coal, higher rank coal, and biomass samples during devolatilization, with activation energy values ranging from 149 to 270 kJ/mol for different models. Thermodynamic parameters were also estimated and compared across different methods.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Agricultural Engineering
Panbo Yang, Shuheng Zhao, Quanguo Zhang, Jianjun Hu, Ronghou Liu, Zhen Huang, Yulong Gao
Summary: The study found that the synergistic effect between cotton stalk and high-ash coal in copyrolysis/gasification processes can be enhanced by heating to 950 degrees Celsius to increase gas production. There is a linear relationship between the gas yield during copyrolysis and the mixing ratio of cotton stalk, indicating almost no interaction between the two. The addition of steam can enhance the catalytic effect of alkali metals and alkaline earth metals in cotton stalk during cogasification, while the synergistic effect is reduced as the blending ratio of cotton stalk increases.
BIORESOURCE TECHNOLOGY
(2021)
Article
Thermodynamics
Namik Unlu, Sibel Ozdogan
Summary: In this study, the effect of blending torrefied biomass and coal samples on entrained flow co-gasification was experimentally investigated. The results showed that blending torrefied biomass with coal improved the gasification efficiency and syngas quality compared to conventional coal gasification. The findings suggest that co-utilization of coal and biomass can contribute to energy, waste, and climate change issues.
Article
Chemistry, Applied
Ge Kong, Xin Zhang, Kejie Wang, Jing Li, Linling Zhou, Jin Wang, Xuesong Zhang, Lujia Han
Summary: Biomass gasification coupled with inline co-steam reforming (BGCSR) process was proposed to enhance H2 production and tar removal. Various gasification/pyrolysis biochar materials (G/PCMs) were used as reforming agents and co-reactants. Microalgae showed the most positive synergistic effect on H2 production and tar reduction. The presence of C[F900] resulted in the highest cumulative gas yield, H2 yield, and tar elimination synergistic effect. This study provided a novel and effective strategy for biomass valorization into H2-enriched gas while minimizing tar formation.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Thermodynamics
Juntao Wei, Qinghua Guo, Xudong Song, Lu Ding, Alexander Mosqueda, Yurong Liu, Kunio Yoshikawa, Guangsuo Yu
Summary: This study investigated the co-gasification of blended char of bituminous coal and rice straw at different temperatures and found that the interaction between the binary particles influenced the reactivity and kinetics during co-gasification. The synergistic effect was weaker at higher HTC and gasification temperatures, affecting the transformation of mineral matter and the chemical structure evolution. The results suggest that the presence of synergistic effect can enhance blended char reactivity and improve co-gasification kinetics.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Zi-Meng He, Yu-Jie Deng, Jing-Pei Cao, Xiao-Yan Zhao
Summary: Co-gasification of biomass and coal has advantages in mitigating ash-related problems induced by potassium in biomass. However, the effect varies depending on the occurrence mode of inorganic K in biomass. The study found that K2CO3 and K2SO4 are mainly retained as KAlSiO4 and K2SO4 in the gasification ash. Co-gasification with coal can help mitigate bed agglomeration caused by K2CO3, K2SO4, and KCl in biomass.
Review
Chemistry, Physical
Juntao Wei, Miao Wang, Fuchen Wang, Xudong Song, Guangsuo Yu, Yurong Liu, Hari Vuthaluru, Jie Xu, Yin Xu, Hong Zhang, Shu Zhang
Summary: Co-gasification is a promising method for the clean and efficient co-utilization of biomass and coal. Understanding the factors influencing co-gasification reactivity is crucial for revealing the reaction mechanism. Previous researchers have provided significant data for the industrial application of co-gasification technology.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Yukai Li, Shaozeng Sun, Dongdong Feng, Wenda Zhang, Yijun Zhao, Yukun Qin
Summary: Syngas tempering technology is a method to consume excess O2 in flue gas and increase the reactivity of reburning coal to reduce NO emissions. Experimental results showed that syngas tempering increased the specific surface area and pore volume of char, while decreasing the content of oxygen-containing groups and increasing the content of alkyl groups. CH4 exhibited a better tempering effect than H2, while the effect of CO was not significant. The study provides insights for improving the removal efficiency of existing pulverized coal reburning for NOx emissions reduction.
Article
Engineering, Environmental
Jianjun Cai, Ronghua Zeng, Wenheng Zheng, Shubin Wang, Jie Han, Kaiqiang Li, Ming Luo, Xingying Tang
Summary: The co-gasification of RDF and biomass is an efficient technology for MSW utilization, with higher temperature and ER values promoting syngas yield. Co-gasification demonstrated synergistic enhancements in carbon conversion efficiency, gas yield, and cold gas efficiency. Positive synergy effects were observed at lower ER and higher temperatures, while negative synergy effects tended to appear at higher ER values.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Green & Sustainable Science & Technology
Liang Xu, Guangqing Zhu, Yanqing Niu
Summary: This study investigates the preheating co-firing behavior of coal and biomass and its impact on PM and NO emissions. It shows that preheating combustion reduces PM1, PM1-10, and NO emissions from coal by 22.30%, 10.75%, and 49.84% respectively, and reduces emissions from biomass by 28.61%, 15.16%, and 53.01% respectively compared to conventional combustion. Preheating co-firing experiments reveal that as the co-firing ratio increases, NO emissions decrease, but the emissions of PM1 initially decrease and then increase, reaching a minimum at a co-firing ratio of 25%. The lower the rank of the coal, the better the effect of preheating combustion and preheating co-firing, and the ash content and composition of coal also impact the generation of PM1.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Energy & Fuels
Soumitra Pati, Sudipta De, Ranjana Chowdhury
Summary: This study developed a steady state process simulation of co-gasification of mixed Indian LBs using Aspen plus, and found the optimal combinations for energy and exergy efficiency.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Review
Chemistry, Multidisciplinary
Antony Rajendran, Marimuthu Rajendiran, Zhi-Fen Yang, Hong-Xia Fan, Tian-You Cui, Ya-Gang Zhang, Wen-Ying Li
Article
Chemistry, Applied
Xing-Bao Wang, Zi-Zheng Xie, Liang Guo, Zhen-Yi Du, Wen-Ying Li
Summary: This study investigates the mechanism of dibenzofuran hydrodeoxygenation on the Pt(111) surface using density functional theory calculations. The results show that the five-membered-ring opening of tetrahydrodibenzofuran is easier than that of hexahydrodibenzofuran, leading to the formation of 2-cyclohexylphenol through a nonconsecutive hydrogenation pathway and multiple radical species. The investigation suggests that the target product bicyclohexane is most likely formed through a radical intermediate during the hydrodeoxygenation of dibenzofuran on the Pt(111) surface, providing valuable theoretical guidance for designing new catalysts in coal to liquid hydrodeoxygenation.
Article
Energy & Fuels
Chong He, Fang Cao, Yuexing Wei, Zibing Zhao, Liping Cui, Yuhong Qin, Stanislav V. Vassilev, Christina G. Vassileva
Summary: The gasification behavior of coal and rice straw differs when gasified separately, but during co-gasification, the presence of rice straw particles promotes the shrinkage of coal particles due to their abundant alkaline components. The ash fusion mechanism of coal is characterized by a "softening-melting" process, while rice straw follows a typical "melting-dissolution" mechanism.
Article
Engineering, Chemical
Yi Huang, Jie Feng, Chang-Hai Liang, Peng Huang, Xiang-Wen Zhang, Qiang Xie, Wen-Ying Li
Summary: The efficient transformation of medium- and low-temperature coal tar into high-performance fuel and value-added chemicals has been achieved through an innovative coal tar processing process. A matrix of model compounds was used to represent the coal tar and hydrogenation products in order to optimize process parameters through kinetics modeling. The energy efficiency and element utilization associated with the entire process were calculated, and the energy use, CO2 emission, and target costing of the proposed coal tar process were evaluated through life cycle assessment.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Xiao Chen, Xing-Bao Wang, Shuhua Han, Dong Wang, Chuang Li, Weixiang Guan, Wen-Ying Li, Changhai Liang
Summary: This study reports a significant enhancement of intermediate selectivity and stability in the hydrogenation of anthracene over an irreducible SiO2 supported Pt catalyst due to SMSI-induced formation of intermetallic Pt silicide and Pt-SiO2 interface. The isolated Pt active sites by Si atoms lead to a preferential transfer of activated H species to the outer ring of anthracene, resulting in a high yield of symmetric octahydroanthracene. Furthermore, the Pt2Si/SiO2 catalyst shows excellent stability and broadens the understanding of SMSI effect in irreducible oxide supported metal particle catalysts.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Energy & Fuels
Chong He, Jin Bai, Lingxue Kong, Xiaoming Li, Jing Guo, Zongqing Bai, Yuhong Qin, Wen Li
Summary: The study investigated the effect of iron valence on the fusion behavior of synthetic coal ash. Results showed that the addition of metallic iron decreased the initial melting temperature of the ash by facilitating low-temperature eutectic reactions. The presence of Fe2+ in low-calcium ash promoted eutectic reactions in the Si-Fe-O system, while in high-calcium ash, the abundant calcium hindered the transition of Fe3+ to Fe2+, leading to an increase in initial shrinkage temperature.
Article
Green & Sustainable Science & Technology
Antony Rajendran, Hong-Xia Fan, Tian-You Cui, Jie Feng, Wen-Ying Li
Summary: This study reported a novel preparation method for oxidative desulfurization catalysts, which involves the hydrothermal synthesis of mesoporous tin oxide-supported octamolybdates and exhibits higher turnover frequency in the oxidative desulfurization reaction. This catalytic system shows promise in contributing to the establishment of an SOx-free environment.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Energy & Fuels
Yuefeng Wang, Shugang Guo, Fang Cao, Chong He, Yuexing Wei, Yuhong Qin, Yanyun He, Xing Du, Stanislav V. Vassilev, Christina G. Vassileva
Summary: Water washing is an efficient method to alleviate ash-related problems in large-scale biomass gasification by reducing the concentrations of ash-forming elements. It can reduce ash deposition, corrosion, fouling, acid gas emission, and other issues caused by volatile ash-forming elements in biomass.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Crystallography
Ze Li, Jie-Ying Jing, Zhi-Qiang Qie, Wen-Ying Li
Summary: Jet fuel rich in hydroaromatics and cycloalkanes can be derived from direct coal liquefaction oil through the hydrogenation saturation process. An efficient catalyst, Ni2P/Al2O3, with high selectivity in transforming naphthalene hydrocarbons to hydroaromatics and cycloalkanes, was developed by the thermal decomposition of hypophosphite at different reduction temperatures. The results showed that the reduction temperature had a significant impact on the properties of the Ni2P/Al2O3 catalysts, and a reduction temperature of 400 degrees C yielded a catalyst with superior catalytic activity, attributed to smaller particle size, higher specific surface area, and suitable acidity.
Article
Chemistry, Analytical
Jieying Jing, Zemin Zhao, Xuewei Zhang, Jie Feng, Wenying Li
Summary: In this study, pulverized semi-coke was used to prepare activated carbon as a CO2 adsorbent via steam activation. The effects of preparation parameters on the structure and performance of the activated carbon were investigated. It was found that demineralization before activation greatly increased the microporous structure of the activated carbon, and pores smaller than 1 nm were favorable for CO2 sorption.
Article
Agricultural Engineering
Chong He, Yujia Du, Xingrui Cai, Jirui Wang, Yuhong Qin, Zibing Zhao, Huaizhu Li, Stanislav V. Vassilev, Christina G. Vassileva
Summary: The high contents of certain ash-forming elements in biomass ash can cause ash-related problems during co-gasification of coal and biomass, affecting gasifier operation. In this study, the sintering behavior of different ash mixtures was investigated and the sintering mechanism was revealed through phase studies. The results showed that the sintering temperature reached its minimum at a specific blending ratio of Jatropha seed cake ash in the coal-biomass ash mixture. The presence of specific crystalline phases and the transition of phosphorus from fluxing effect to refractory effect played important roles in the sintering process. These findings can be used for predicting the ash sintering temperature in coal-biomass gasifiers.
BIOMASS & BIOENERGY
(2023)
Article
Thermodynamics
Yuefeng Wang, Xingrui Cai, Shugang Guo, Chong He, Yuexing Wei, Yue Wang, Yuhong Qin, Stanislav V. Vassilev, Christina G. Vassileva, Yanyun He
Summary: The addition of biomass such as straw in the coal gasification process is one of the strategies for clean and efficient utilization of coal with decreasing CO2 emissions. However, the abundance of chlorine and alkaline metals contained in the corn straw is the key factor to aggravate the corrosion, deposition, and slagging of the co-gasifier. The effects of temperature (700-900 degrees C), residence time (2-12 min) and the addition ratios of corn straw on the migration behavior of Cl are studied during co-gasification of Shenmu coal and corn straw.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Engineering, Environmental
Hongyu Niu, Xing-Bao Wang, Jingjie Luo, Jiaxin Liu, Chuang Li, Wen-Ying Li, Changhai Liang
Summary: This study investigates the C-S cleavage mechanism of dibenzothiophenes with or without steric hindrance under mild conditions. The reactive adsorption desulfurization mechanism on Pt/ZnO is proposed based on the adsorption model, Pt efficiency, and structural evolution of Pt active centers. By utilizing the interface between PtSx and ZnO, highly efficient cleavage of dibenzothiophenes (99.9% fracture) is achieved with or without steric hindrance (TOF = 15 h-1 or TOF = 128 h-1). This work has significant practical implications for the development of atmospheric industrial adsorbents for ultra deep reactive adsorption desulfurization.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Laisong Wang, Jie Feng, Yuncai Song, Wen-Ying Li
Summary: The study investigated the synergistic effects of co-gasification between coal and biomass at different blending ratios, temperatures, and contact conditions. The addition of biomass volatiles significantly enhanced the reaction performance of the blends, leading to more efficient synergy between the two types of particles. The study also showed that improving contact conditions and reducing particle distance could enhance synergy and improve gasification kinetics.
JOURNAL OF THE ENERGY INSTITUTE
(2023)
Review
Chemistry, Physical
Antony Rajendran, Tian-you Cui, Hong-xia Fan, Zhi-fen Yang, Jie Feng, Wen-ying Li
JOURNAL OF MATERIALS CHEMISTRY A
(2020)
Correction
Chemistry, Applied
Jia Liu, Juntong Dong, Xiaodan Li, Teng Xu, Zhenguo Li, Jeffrey Dankwa Ampah, Mubasher Ikram, Shihai Zhang, Chao Jin, Zhenlong Geng, Tianyun Sun, Haifeng Liu
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Seba Alareeqi, Daniel Bahamon, Kyriaki Polychronopoulou, Lourdes F. Vega
Summary: This study explores the potential application of single-atom-alloy (SAA) catalysts in bio-oils hydrodeoxygenation refining using density functional theory (DFT) and microkinetic modeling. It establishes the relationships between stability, adsorptive properties, and activity structures for bio-oil derivatives, providing guidance for the synthesis of cost-effective SAA combinations.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Bin Hu, Wen -Ming Zhang, Xue-Wen Guo, Ji Liu, Xiao Yang, Qiang Lu
Summary: This study explored the pyrolysis behaviors and mechanisms of different monosaccharides, including arabinose, galactose, galacturonic acid, and glucuronic acid. The roles of structural differences in these monosaccharides were analyzed, and it was found that glucuronic acid undergoes a special C-C bond breaking reaction during pyrolysis. The findings provide a deep understanding of the pyrolysis chemistry of hemicellulose and the role of different branches.
FUEL PROCESSING TECHNOLOGY
(2024)
Review
Chemistry, Applied
Youwei Zhi, Donghai Xu, Guanyu Jiang, Wanpeng Yang, Zhilin Chen, Peigao Duan, Jie Zhang
Summary: Hydrothermal carbonization (HTC) is an effective method for the harmless disposal of municipal sludge (MS) and offers potential applications for the obtained products. Optimizing reaction conditions, coupling with other waste materials, and combining different processes can improve the performance of HTC. Furthermore, HTC contributes to energy recovery and enhances the quality of life cycle assessment.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Jia Wang, Jianchun Jiang, Dongxian Li, Xianzhi Meng, Arthur J. Ragauskas
Summary: This study presents a scalable process for converting holocellulose and cellulosic wastes into advanced oxygen-containing biofuels with high furan, cyclic ketone, and ethanol content. By combining hydropyrolysis and vapor-phase hydrodeoxygenation using Pd/Al2O3 as a catalyst, the researchers achieved high yields and conversions. The integrated process holds great promise for biomass waste conversion into advanced biofuels.
FUEL PROCESSING TECHNOLOGY
(2024)
Article
Chemistry, Applied
Florian Held, Jannis Reusch, Steffen Salenbauch, Christian Hasse
Summary: The accurate prediction and assessment of soot emissions in internal combustion engines are crucial for the development of sustainable powertrains. This study presents a detailed quadrature-based method of moments (QMOM) soot model coupled with a state-of-the-art flow solver for the simulation of gasoline engines. The model accurately describes the entire cause-and-effect chain of soot formation, growth and oxidation. Experimental validation and engine cycle simulations are used to identify the root cause of observed soot formation hotspots.
FUEL PROCESSING TECHNOLOGY
(2024)
