Study of co-pyrolysis of Yulin-coal blended with residue of coal/oil co-processing: pyrolysis characteristics and properties of the char

doi:10.16085/j.issn.1000-6613.2018-1481

Abstract

Abstract: Co-pyrolysis behavior and char properties of Yulin coal blended with residue from China YanChang industrial direct coal liquefaction plant has been investigated through thermogravimetry spectrometry and Gray- king low-temperature carbonization. The results show a positive synergistic effect in the pyrolysis process when the proportion of residue is lower than 40%. When the amount of residue is 20%, the yield of tar is higher more than the theoretical value of 6.201% which is 139.7% of the coal alone, when the amount of residue is 20%, the char is A type and the cohesiveness increases. The residue increases the maximum weight loss rate of char during CO₂ gasification, which helps the gasification, but impedes the combustion of char, which is even worse when amount of residue is higher than 20%.

Key words: coal/oil co-processing, residue, co-pyrolysis, activation of the char, synergistic effect

摘要： 以煤油共炼残渣与榆林煤为原料，基于热重分析仪和格金干馏仪，开展共炼残渣与煤共热解过程的协同效应及半焦性质研究。实验结果表明：共炼残渣添加比例为0～40%时，煤与共炼残渣之间具有正的协同效应；添加量为20%时，焦油产率高出理论值6.2%，是煤单独热解焦油产率的139.7%，半焦产物为A型且黏结性增加；半焦性质分析结果显示，共炼残渣能够提高半焦在CO₂气化过程中的最大失重速率，有利于气化反应的进行，但会使半焦的燃烧性能变差且在添加量高于20%的情况下更为明显。

关键词: 煤油共炼, 共炼残渣, 共热解, 半焦活性, 协同效应

CLC Number:

TQ533.9

HUANG Chuanfeng, HAN Lei, HUO Pengju, LIU Shuwei, CHENG Qiuxiang. Study of co-pyrolysis of Yulin-coal blended with residue of coal/oil co-processing: pyrolysis characteristics and properties of the char[J]. Chemical Industry and Engineering Progress, 2018, 37(S1): 57-62.

黄传峰, 韩磊, 霍鹏举, 刘树伟, 程秋香. 煤油共炼残渣与榆林煤共热解特性及半焦性质[J]. 化工进展, 2018, 37(S1): 57-62.

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