Article
Thermodynamics
Zhutao Liu, Jin-Hui Zhan, Dengguo Lai, Minghui Zuo, Xiaoxing Liu
Summary: This study investigated the intrinsic characteristics of Naomaohu coal pyrolysis in a two-stage fixed-bed reactor. The results showed that different temperature chars had varying effects on pyrolysis volatiles, with temperature playing a major role in affecting the distribution of pyrolysates. Char was found to be beneficial for the content and quality of light oil in the low-temperature range, but had a negative impact on the yield and quality of oil in higher temperatures.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Yao Zhu, Qinhui Wang, Kaikun Li, Jianmeng Cen, Mengxiang Fang, Chengdong Ying
Summary: In this study, the pressurized isothermal pyrolysis characteristics of coal were investigated using a pressurized micro-fluidized bed reaction analyzer (P-MFBRA) for the first time. The effect of pressure on gas release characteristics and the kinetics of pressurized isothermal pyrolysis were explored. The results showed that the yields of CO2, CO, CH4, and H-2 increased with temperature and pressure. The differences in gas-releasing order reduced with increasing temperature and pressure, while the difference in gas-ending order first decreased and then increased with pressure.
Article
Energy & Fuels
Luyao Qiang, Boyang Bai, Zhiwei Peng, Suisui Zhang, Hui Chang, Ming Sun, Long Xu, Xiaoxun Ma
Summary: This study investigated the relationship between the structure and pyrolysis of coal by using three different pretreatment methods. The results showed that these pretreatment methods had different effects on the pore modification and evolution of functional groups in coal, ultimately altering the distribution and composition of the pyrolysis products.
Article
Thermodynamics
Wei Yang, Yihan Wang, Fazhi Yan, Guangyao Si, Baiquan Lin
Summary: This paper investigates the microstructural changes of high gas content coal samples after pyrolysis at different temperatures and their effects on gas adsorption capacity. The results show that the methane adsorption capacity of coal samples decreases as the pyrolysis temperature increases. The content of C=C, -OH, C=O, -CH2 in coal molecules also decreases gradually.
Article
Environmental Sciences
Ziyi Wang, Zhiqiang Gong, Zhenbo Wang, Xiaoyu Li, Jixiang Liu, Chen Tang, Zhiwei Chu
Summary: Pyrolysis can harmlessly treat petroleum sludge and recover energy materials in a short period. The pyrolysis temperature has a significant effect on the composition of the products, with higher temperatures favoring the production of small molecule products. The pyrolysis treatment shows good curing effect on chromium.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Energy & Fuels
Hengyi Jia, Kai Wang, Chao Xu, Qiang Fu
Summary: The permeability distribution law of protected coal seams is vital for their mining. This study established a numerical model to investigate the stress evolution and damage characteristics of protected coal seams. The permeability evolution law was derived by combining mechanical-seepage experiments and numerical simulations, and the gas drainage data confirmed its accuracy.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Chemistry, Applied
Qian Wang, Meijun Wang, Huan Wang, Jiao Kong, Wei Xie, Jiancheng Wang, Liping Chang, Weiren Bao
Summary: Temperature and gasification gases have significant impacts on the reactions of volatiles generated from rapid pyrolysis of low rank coal. Higher temperature can reduce the ratio of aliphatic hydrocarbons and oxygen-containing compounds, increase polycyclic aromatic naphthalene, and introducing gasification gas from char can enhance tar yields. The results suggest that temperature affects the diffusion and condensation of tar, while free radicals from the gasification gas may alter the repolymerization of volatiles.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Agricultural Engineering
Hongliang Sun, Dongdong Feng, Shaozeng Sun, Yijun Zhao, Linyao Zhang, Guozhang Chang, Qingjie Guo, Jiangquan Wu, Yukun Qin
Summary: This paper investigates the effect of alkali and alkaline earth metallic species on the thermal conversion of corn straw. The results show that K/Ca loading promotes the conversion of certain chemical groups in corn straw, especially K element has a strong influence. It helps reduce CH4 and CO emissions and promote CO2 release during pyrolysis.
BIOMASS & BIOENERGY
(2022)
Article
Thermodynamics
Lin Xin, Mingyu An, Mingze Feng, Kaixuan Li, Weimin Cheng, Weitao Liu, Xiangming Hu, Zhigang Wang, Limin Han
Summary: This study simulated the pyrolysis process of lump coal in UCG tunnel, showing that with the increase of final pyrolysis temperature, the functional group content of coal samples decreased and the structure became more disordered.
Article
Thermodynamics
Yuan Jiang, Peijie Zong, Bin Tian, Xue Ming, Fanfan Xu, Yuanyu Tian, Yingyun Qiao, Dawei Li, Qingshuo Song, Qiankun Yu
Summary: Studying the pyrolysis behavior of the saturate component in coal, which mainly consists of volatile substances, through the combined utilization of TG-FTIR and Py-GC/MS revealed a free radical reaction mechanism. The research provides a methodological model for exploring other group components and reveals specific details about the pyrolysis of coal.
Article
Environmental Sciences
Xin Hu, Qiang Sun, Qingmin Shi, Nianqin Wang, Jishi Geng, Shengze Xue
Summary: Coal pyrolysis is an important method for utilizing coal resources, but it may release radioactive gas radon during high-temperature pyrolysis. This study conducted experiments to measure the radon release concentration of pyrolysis products in different atmospheric environments and found a negative correlation between the heat treatment temperature and the radon release rate.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Energy & Fuels
Minghao Yi, Yuanping Cheng, Chenghao Wang, Zhenyang Wang, Biao Hu, Xinxin He
Summary: The hydrochloric acid treatment significantly reduced the content of minerals and volatile matter in coal, which increased the porosity and pore connectivity of coal. The role of minerals in pores of different sizes varied, affecting the evolution of coal pore structure.
Article
Chemistry, Analytical
Shaoyan Sun, Donghai Xu, Ya Wei, Youwei Zhi, Guanyu Jiang, Yang Guo
Summary: Pyrolysis is a crucial method for clean and efficient utilization of coal, influenced by various factors such as temperature, coal type, and biomass addition. Proper regulation of process parameters can achieve desirable target effect, and synergistic effects can be found during co-pyrolysis of coal and biomass.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Energy & Fuels
Yihan Wang, Wei Yang, Fazhi Yan, Yuchen Li, Guangyao Si, Baiquan Lin
Summary: This study investigates the impact of the molecular structure of coal on the gas adsorption ability of coal seams. Results show that as the pyrolysis temperature rises, the molecular structure of coal is restructured and layered, and the degree of polycondensation increases. Heating also decomposes the active functional groups inside the coal sample, resulting in a deepening of the aromatization degree. High-temperature pyrolysis breaks various chemical bonds in the coal sample, releasing a substantial amount of light hydrocarbon and reducing the overall adsorption capacity of the coal.
Article
Chemistry, Analytical
Haigang Zhang, Zhongjie Shen, Zizheng Dong, Yiru Yang, Jianliang Xu, Qinfeng Liang, Haifeng Liu
Summary: This paper investigates the effects of temperature and oxygen content on coal pyrolysis product distribution, char structure, and reactive properties. The results show that higher temperature enhances the release of volatiles and tar cracking, leading to increased gas phase yield and syngas concentration. However, temperatures above 900 degrees Celsius intensify char graphitization, which is not favorable for gasification. Oxygen introduction at 900 degrees Celsius accelerates the release of volatiles and intensifies depolymerization reaction, increasing the gas yields of CO and CO2. The presence of trace oxygen reduces char graphitization and improves gasification reactivity but high oxygen content (8%) leads to combustion on the char surface, destroying its structure and reducing gasification activity.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Energy & Fuels
Qian Li, Zhihua Wang, Yong He, Qiang Sun, Yanwei Zhang, Sunel Kumar, Kang Zhang, Kefa Cen
Article
Energy & Fuels
Kang Zhang, Yong He, Zhihua Wang, Tiehao Huang, Qian Li, Sunel Kumar, Kefa Cen
Article
Engineering, Environmental
Can Ding, Dingkun Yuan, Zhihua Wang, Yong He, Sunel Kumar, Yanqun Zhu, Kefa Cen
OZONE-SCIENCE & ENGINEERING
(2018)
Article
Green & Sustainable Science & Technology
Zain Ali Saleh Bairq, Rundong Li, Yanlong Li, Hongxia Gao, Teerawat Sema, Wenchao Teng, Sunel Kumar, Zhiwu Liang
JOURNAL OF CLEANER PRODUCTION
(2018)
Article
Energy & Fuels
Qian Li, Zhihua Wang, Zhenmin Lin, Yong He, Kang Zhang, Sunel Kumar, Kefa Cen
JOURNAL OF ENERGY RESOURCES TECHNOLOGY-TRANSACTIONS OF THE ASME
(2018)
Article
Physics, Fluids & Plasmas
Songru Xie, Yong He, Dingkun Yuan, Zhihua Wang, Sunel Kumar, Yanqun Zhu, Kefa Cen
PLASMA SCIENCE & TECHNOLOGY
(2019)
Article
Energy & Fuels
Jiaming Shao, Ye Yang, Ronald Whiddon, Zhihua Wang, Fawei Lin, Yong He, Sunel Kumar, Kefa Cen
Article
Engineering, Chemical
Sunel Kumar, Zhihua Wang, Zhang Kang, Jun Xia, Ronald Whiddon, Yong He, Jaffri Gul-e-Rana, Zain Ali Saleh Bairq, Kefa Cen
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2019)
Article
Engineering, Multidisciplinary
Kumar Sunel, He Yong, Wang ZhiHua, Liu LongLong, Zhu YanQun, Cen Kefa
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2019)
Article
Green & Sustainable Science & Technology
Abdul Rahim Shaikh, Qinhui Wang, Long Han, Yi Feng, Zohaib Sharif, Zhixin Li, Jianmeng Cen, Sunel Kumar
Summary: A combined cycle, biomass calcium looping gasification system for hydrogen and electricity production was proposed and analyzed using Aspen Plus. The optimized system showed higher system efficiency and shorter payback period compared to the traditional system. The results indicate a promising market prospect for the system in the near future.
Article
Energy & Fuels
Ye Yuan, Yong He, Jiaxin Tan, Yongmeng Wang, Sunel Kumar, Zhihua Wang
Summary: This study investigated the co-combustion characteristics of coal and biomass blends using thermogravimetric analysis and found that increasing the biomass percentage improved combustion performance. A 20% blending ratio was identified as the optimal percentage for co-utilization of coal-biomass blends.
FRONTIERS IN ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Sunel Kumar, Zhihua Wang, Yong He, Yanqun Zhu, Kefa Cen
Summary: The optimization of gasification performance using a 3D CFD model for single-stage drop tube coal gasification is compared with experimental results. The study investigates a single-stage down-drop gasifier with multiple coal injectors and a single oxygen injector at different temperatures and O-2/coal ratios. The results show that the maximum CO production and carbon conversion can be achieved under specific temperature and O-2/coal ratio conditions.
Article
Agricultural Engineering
Shuang Wang, Jiangyi Zhou, Yifei Zhang, Sirong He, Sivakumar Esakkimuthu, Kai Zhu, Sunel Kumar, Gaojin Lv, Xun Hu
Summary: This study demonstrates the importance of using biochar and Chlorella protothecoides together for adsorbing tetracycline in environmental purification. The addition of biochar increases the biomass of Chlorella protothecoides and it proves that Chlorella protothecoides can completely absorb low concentrations of tetracycline.
BIORESOURCE TECHNOLOGY
(2023)
Article
Thermodynamics
Feipeng Xiang, Yong He, Sunel Kumar, Zhihua Wang, Longlong Liu, Zhenyu Huang, Jianzhong Liu, Kefa Cen
APPLIED THERMAL ENGINEERING
(2017)
