Article
Thermodynamics
Jiawei Li, Subo Fan, Xuyang Zhang, Zhichao Chen, Yanyu Qiao, Zhenhua Yuan, Zhengqi Li
Summary: This study investigated the co-combustion of coal gasification fine ash (CGFA) and raw coal (RC), exploring its thermal conversion, synergistic behavior, kinetics, thermodynamics, and gas release behavior. The results demonstrated that adding RC to CGFA enhanced the combustion performance of CGFA and reduced the formation of polluting gases. This research contributes to the development of new energy strategies utilizing CGFA combustion.
Article
Energy & Fuels
Di Xie, Yi Zhong, Jingchun Huang, Bo Wang, Zhenqi Wang, Wei Hu, Changxi Zhao, Yu Qiao
Summary: In this study, the steam gasification performance of raw and torrefied mixed food wastes was investigated. Results showed that when cabbage was co-gasified with rice or pork, there was a synergistic promotion of H-2 and CO2 production. However, the interaction between pork and rice led to an inhibition effect on gas formation. Torrefaction pretreatment enhanced the synergistic promotions of H-2, CO2, and CO production for mixtures containing cabbage, and alleviated the inhibitory effect for mixtures of pork and rice. Overall, co-gasification of food waste with high AAEM content with another typical food waste and torrefaction pretreatment were found to improve gasification efficiency.
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
Energy & Fuels
Sanjun Wu, Shihui Wang, Zhenshan Li
Summary: The study developed a micro-fluidized bed integrated with thermogravimetry-mass spectrometry (MFB-TG-MS) to evaluate the combustion kinetics of biomass char in the fluidized state. The MFB-TG-MS system reported herein allows for effective measurements of the rapid combustion kinetics closer to the intrinsic kinetics inside a fluidized bed reactor. A genetic algorithm was employed to optimize certain combustion kinetic parameters. This study provides valuable insights into the kinetics of biomass char combustion.
Article
Engineering, Chemical
Jianbin Wang, Jian Chen, Jianzhong Liu, He Liu, Mingxia Wang, Jun Cheng
Summary: The study explores a novel strategy of utilizing waste activated carbon (WAC) in synergy with coal powder to prepare coal water slurry (CWS) for high-temperature gasification, revealing that WAC exhibits excellent adsorption capacity and surface wettability. It increases the storage stability of CWS, shifts CO2 gasification reaction to low-temperature stage, and enhances CO gas component in synthesis gas.
Article
Green & Sustainable Science & Technology
Shaohua Du, Shouzheng Yuan, Qiang Zhou
Summary: The study focuses on the co-gasification of PET and coal in a fluidized bed reactor, taking into account variations in particle size, density, and devolatilization reaction rate modification. The model's effectiveness is verified by comparing simulation results with experimental data. Furthermore, the study discusses the impacts of inlet gas velocity, solid feed position, and initial particle size on hydrodynamics and co-gasification reaction.
Article
Engineering, Environmental
Guangchao Ding, Boshu He, Huifeng Yao, Yucheng Kuang, Jingge Song, Liangbin Su
Summary: In this study, the co-gasification characteristics and synergistic interaction of municipal solid waste (MSW) and bituminous coal (BC) in CO2 atmosphere were investigated using thermogravimetric analysis. Results showed that addition of MSW can enhance the gasification reactivity of BC, leading to improved overall gasification efficiency. A significant synergistic effect was observed in the char gasification stage for all blends, with the optimal blend ratio of BC found to be 40% for the co-gasification process.
Review
Energy & Fuels
Miao Wang, Yiling Wan, Qinghua Guo, Yonghui Bai, Guangsuo Yu, Yurong Liu, Hong Zhang, Shu Zhang, Juntao Wei
Summary: Petroleum coke and biomass/coal co-gasification is a promising approach for efficiently integrating the individual advantages of different gasification feedstocks with syngas production. Research on syngas production, reactivity characteristics, and synergy behavior of co-gasification is critical. H-2-rich syngas and higher co-gasification reactivity can be acquired under specific conditions, such as high H/C ratio, coal/biomass proportion, gasification temperature, and gasification agent concentration. Synergy behavior in co-gasification shows relationships with free radical migration and AAEMs transfer.
Article
Energy & Fuels
Rui Diao, Yaojun Yang, Tao Chen, Xifeng Zhu
Summary: In this study, a co-pyrolysis strategy was proposed to convert bio-oil distillation sludge (DS) into syngas efficiently. The results showed that rapeseed cake (RC) had a higher gasification reactivity compared to DS, indicating its potential to enhance the biochar reactivity of DS. The ordered arrangement of crystallites in DS char hindered the gasification reaction, while the large amounts of amorphous carbons and defects in RC char promoted its reactivity. Additionally, machine learning algorithm was utilized to predict the co-gasification behaviors, showing promising results.
Article
Engineering, Chemical
Xiaoming Li, Jingxia He, Mengjie Liu, Jin Bai, Zongqing Bai, Wen Li
Summary: Co-gasification of coal and biomass is an important method for reducing fossil fuel consumption and utilizing biomass resources efficiently. The structural properties and gasification reactivity of coal char were studied after co-pyrolysis with two different types of biomass. The results showed that K and Mg from biomass easily evaporated and deposited on coal char, leading to an increase in AAEMs content. The inhibition effect on the graphitization degree of coal char increased with increasing blend ratio, and the catalytic activity of inorganic mineral played a more important role in predicting gasification reactivity.
Review
Chemistry, Applied
Juntao Wei, Miao Wang, Deliang Xu, Lei Shi, Bin Li, Yonghui Bai, Guangsuo Yu, Weina Bao, Jie Xu, Hong Zhang, Shu Zhang
Summary: This paper provides a detailed summary of the main detection methods for the migration and transformation of alkali/alkaline earth metal species (AAEMs) during biomass and coal co-gasification. It systematically reviews the influencing factors and proposes pathways for the migration and transformation of AAEMs. Furthermore, it discusses the relationship between AAEMs migration and transformation and the synergy of co-gasification.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Environmental Sciences
Rezgar Hasanzadeh, Parisa Mojaver, Taher Azdast, Ata Chitsaz, Chul B. Park
Summary: The issues of global plastic waste generation and demand for hydrogen energy can be simultaneously resolved by incorporating plastic waste into coal gasification, which improves hydrogen concentration and carbon dioxide production while increasing energy efficiency.
Article
Thermodynamics
Lirui Mao, Mingdong Zheng, Hanxu Li
Summary: This study investigates the disposal of 1,4-butanediol (BDO) tar using waste-coal-water-slurry (WCWS) technology and examines the acceleration mechanism during co-gasification. The results show that the weight loss of BDO tar is most evident in the 200-300 degrees C range, and the co-gasification performance is significantly enhanced at high temperatures. The presence of alkali metal Na in BDO tar creates distinct areas on the surface of coal char, impeding the formation of defective carbon structures.
Article
Energy & Fuels
Yuxin Wen, Simeng Liu, Shihao Fu, Zhiheng Wang, Haoquan Hu, Lijun Jin
Summary: The co-pyrolysis of coal and waste tire is a significant method for their clean and efficient utilization. By using a rapid infrared-heated fixed-bed reactor, the effects of heating rate, pyrolysis temperature, and mixing ratio on the products distribution, tar quality, and compositions during the co-pyrolysis of Yulin coal (YL) and waste tire (WT) were investigated. The results revealed that the heating rate, mixing ratio, and pyrolysis temperature exerted a synergistic effect during co-pyrolysis. Moreover, the addition of WT in blends led to an increase in the content of light tar in the co-pyrolysis tar. Gas production was also suppressed during co-pyrolysis.
Article
Thermodynamics
Meng Ma, Jiaofei Wang, Yonghui Bai, Peng Lv, Xudong Song, Weiguang Su, Juntao Wei, Guangsuo Yu
Summary: This study investigated the volatile-char interaction in coal and cow manure co-pyrolysis process and its effect on coal char reactivity. The results showed that the interaction inhibited coal char reactivity, but the inhibition varied depending on the vapor-residence time and co-pyrolysis mode.
