胜利褐煤及盐酸洗煤热解过程中微结构演变特性研究  

Microstructural evolution during pyrolysis of Shengli lignite and hydrochloric acid-demineralized lignite

作　　者：宋银敏[1] 滕英跃[1] 李娜[1] 何润霞[1] 刘全生[1] 王云飞 SONG Yin-min;TENG Ying-yue;LI Na;HE Run-xia;LIU Quan-sheng;WANG Yun-fei(College of Chemical Engineering,Inner Mongolia University of Technology,Inner Mongolia Key Laboratory of High-Value Functional Utilization of Low Rank Carbon Resources,Huhhot 010051,China;College of Chemical Engineering,Ordos Institute of Technology,Ordos 017000,China)

机构地区：[1]内蒙古工业大学化工学院内蒙古自治区低阶碳质资源高值化利用重点实验室,内蒙古呼和浩特010051 [2]鄂尔多斯应用技术学院化学工程系,内蒙古鄂尔多斯017000

出　　处：《燃料化学学报》2021年第4期415-421,共7页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(21766023);内蒙古自然科学基金(2018BS02007,2019MS02025,2020MS02023);内蒙古科技计划项目(2019GG268,2020GG0289);内蒙古工业大学科学研究项目(ZZ201906);2020年中央引导地方科技发展资金(2020ZY0032)资助。

摘　　要：利用固定床获得胜利褐煤及盐酸洗煤在不同温度条件下的半焦。利用FT-IR、XPS、XRD和Raman等技术对所得半焦进行表征,以研究胜利褐煤及盐酸洗煤热解过程中微结构演变特性。结果表明,盐酸洗煤/焦中含氧结构含量相对较高。随热解温度升高,煤/焦中含氧结构所占比例降低。褐煤热解过程中,盐酸洗脱的矿物质会抑制芳环的有序化排列,同时促进褐煤中芳环簇的缩聚,造成煤焦晶体结构缺陷增加,并对煤焦中侧链的发展不利。A fixed-bed pyrolysis experiment was adopted to generate solid products of Shengli lignite(SL)and hydrochloric acid-demineralized lignite(SL+)at different temperatures.The structural properties of the chars were investigated by FT-IR,XPS,XRD,and Raman spectroscopy to correlate with the microstructural evolution of SL and SL+during pyrolysis.The results indicated that the concentration of oxygen-containing structures in hydrochloric acid-demineralized lignite/chars was relatively high and decreased with increasing pyrolysis temperature.The mineral components demineralized by hydrochloric acid limited the orderly arrangement of aromatic rings,promoted the condensation of aromatic ring clusters,caused more crystalline defects in the chars,and was adverse to the development of side chains during pyrolysis.

关 键 词：胜利褐煤 盐酸洗煤 热解 煤结构 

分 类 号：TQ530.2[化学工程—煤化学工程]