不同性质褐煤催化裂解热解产物提质及机理分析  

Catalytic Upgrading of Lignite Pyrolysis Tar Over the Different Properties of Lignite-based Catalyst and the Analysis of Its Mechanism

作　　者：王小华[1] 赵洪宇[2] 宋强[1] 李玉环[3] 舒新前[1] WANG Xiao-Hua;ZHAO Hong-Yu;SONG Qiang;LI Yu-Huan;SHU Xin-Qian(School of Chemical and Environmental Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China;School of civil and resource engineering University of Science & Technology Beijing, Beijing 100083,China;College of energy and power engineering, Inner Mongolia university of technology, Hohhot 010000, China)

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]北京科技大学土木与资源工程学院,北京100083 [3]内蒙古工业大学能源与动力工程学院,呼和浩特010000

出　　处：《工程热物理学报》2019年第5期1194-1203,共10页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51704016);中国博士后科学基金(No.2017M620625);中央高校基本科研业务费专项(No.FRFTP-16-076A1)

摘　　要：采用双层固定床反应器对比研究了原煤单独热解、催化热解,并对热解产物的分布、轻质焦油产率及质量分数、半焦中残留焦油组分的组成进行了考察和表征。结果表明,当热解终温达到500℃时,单独脱灰煤热解焦油产率略大于原煤.催化提质过程中,焦油产率降低,轻质焦油质量分数及气体产物产率增大.下置床层原煤和脱灰煤添加比例分别为40%、半焦添加比例为30%,此时焦油催化裂解轻质化效果达到最佳。焦油产率:脱灰煤催化>原煤催化>半焦催化,而轻质焦油产率和质量分数:原煤催化>半焦催化>脱灰煤催化.催化脱灰煤床层单环、双环以及三环的芳香烃类化合物高于其他两床层,而四环芳香类化合物产率略低于催化原煤和催化半焦床层.The individual pyrolysis of raw coal and demineralized coal and the catalytic pyrolysis of raw coal in a dual-stage fixed-bed reactor over raw coal, demineralized coal and char were investigated.The distributions of pyrolysis products, the yield of tar, light tar and its mass fraction were also measured, and the components of residual tar in the catalytic bed was characterized. The results show that when the pyrolysis temperature reaches 500℃, the yield of tar produced by individual pyrolysis of demineralized coal was slightly higher than that of raw coal. In the process of catalytic upgrading,tar yield was decreased, and the light tar mass fraction and gas product yield were increased. The effect of tar upgrading by catalytic cracking is the best when the addition proportion of raw coal and demineralized coal were 40%, and the addition proportion of char is 30%. The tar yield of catalytic pyrolysis increased in the order are as follows: demineralized coal catalytic bed > raw coal catalytic bed > char catalytic bed. While the yield and mass fraction of light tar increased in the order are as follows: raw coal catalytic bed > char catalytic bed > demineralized coal catalytic bed. The content of single aromatic ring, two aromatic rings and three aromatic compounds in the demineralized coal catalytic bed was higher than that of the other two beds, and tetracyclic aromatic compounds yield slightly lower than that of raw coal catalytic bed and char catalytic bed.

关 键 词：褐煤 催化热解 焦油品质 双层反应器 模拟蒸馏 

分 类 号：TQ530.2[化学工程—煤化学工程]