The effect of hydrothermal pretreatment on the structure and fast pyrolysis behaviors of Sheng Li lignite  

作　　者：Boyang Bai Luyao Qiang Suisui Zhang Zhiwei Peng Hang Mu Xiaoxun Ma 

机构地区：[1]School of Chemical Engineering,Northwest University International Scientific and Technological Cooperation Base of the Ministry of Science and Technology(MOST)for Clean Utilization of Hydrocarbon Resources Chemical Engineering Research Center of the Ministry of Education(MOE)for Advanced Use Technology of Shanbei Energy Shaanxi Research Center of Engineering Technology for Clean Coal Conversion Collaborative Innovation Center for Development of Energy and Chemical Industry in Northern Shaanxi,Xi’an 710069,China

出　　处：《Chinese Journal of Chemical Engineering》2021年第7期265-274,共10页中国化学工程学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(21536009);Science and Technology Plan Projects of Shaanxi Province(2017ZDCXL-GY-10-03)。

摘　　要：The structure and composition of coal determine its fast pyrolysis characteristics,and the study of the relationship between them can play an important role in the efficient and clean utilization of coal.So,in this work,hydrothermal pretreatment was used to artificially change the structure and composition of Sheng Li(SL)lignite,which was used to investigate the influence of structural changes on pyrolysis.The physicochemical structure and composition of samples were characterized by X-ray diffraction,specific surface area and porosity analyzer,solid-state 13C nuclear magnetic resonance,Fourier transform infrared spectroscopy,and elemental analyzer.Pyrolysis experiments were carried out in a powderparticle fluidized bed reactor,and the distribution and composition of the pyrolysis products were analyzed.The gasification activity of char was investigated by thermogravimetric analysis with a CO_(2) atmosphere.The results show that hydrothermal pretreatment(HTP)can destroy the cross-linking structure of SL lignite,and affect its aromaticity,pore structure,functional group,and carbon structure to change the distribution and composition of pyrolysis products of SL lignite,especially the composition of tar.Finally,the structure–activity relationship between the structure,composition,and pyrolysis characteristics of coal was comprehensively studied.

关 键 词：Hydrothermal pretreatment LIGNITE Physicochemical structure Fast pyrolysis 

分 类 号：TQ530.2[化学工程—煤化学工程] TD849.2[矿业工程—煤矿开采]