Study on Combustion and Pollutant Emission of Shenmu Raw Coal and its Pyrolytic Semi-coke
1. College of New Energy, China University of Petroleum (East China), Qingdao 266580, China
2. Dalian Yishunlvse Technology Co., Ltd, Dalian 116023, China
Abstract In order to study the change of surface functional group in the process of making semi-coke from raw coal, in this work, the content and types of functional groups in raw coal and semi-coke were compared and analyzed by Fourier transform infrared spectroscopy (FTIR) firstly. The results showed that in the process of making semi-coke from raw coal, except that aliphatic CH2 and CH3 were relatively stable, in the aromatic group, the C=O of esters, acids, aldehydes and ketones and the C=C bonds of aromatic nuclei were all broken. Carboxyl groups are generated by part of hydroxyl reaction, while C-H of part of functional groups is replaced by aromatic rings. The reduction of these groups with high reactivity results in obvious combustion hysteresis of semi-coke compared with raw coal. On this basis, TG-FTIR technology was used to compare and analyze the combustion and pollutant emission characteristics of raw coal and semi-coke. The results showed that compared with raw coal, the ash shell produced by semi-coke combustion was thicker and less breathable, resulting in less stable and insufficient combustion. Although the total amount and types of nitrogen-containing and sulfur-containing substances in semi-coke were less, more HCN, NH3 and COS were released from semi-coke combustion due to coke reduction and large amount of CO generation.
ZHANG Haoteng1,GONG Zhiqiang1,WANG Zhenbo1 et al. Study on Combustion and Pollutant Emission of Shenmu Raw Coal and its Pyrolytic Semi-coke[J]. 化学反应工程与工艺, 2020, 36(2): 183-192.
ZHANG Haoteng1,GONG Zhiqiang1,WANG Zhenbo1 et al. Study on Combustion and Pollutant Emission of Shenmu Raw Coal and its Pyrolytic Semi-coke[J]. 化学反应工程与工艺, 2020, 36(2): 183-192.
