煤直接液化残渣半焦CO_(2)气化特性及动力学研究  

Study on characteristics anddynamics of direct liquefaction residue semi-coke gasification with CO_(2)

作　　者：徐春霞 XU Chun-xia(Beijing Research Institute of Coal Chemistry,China Coal Research Institute Corporation Ltd;State Key Laboratory of Coal Mining and Clean Utilization;Beijing Key Laboratory of Coal Based Carbon Materials,Beijing 100013,China)

机构地区：[1]煤炭科学技术研究院有限公司煤化工分院 [2]煤炭资源高效开采与洁净利用国家重点实验室 [3]煤基节能环保炭材料北京市重点实验室,北京100013

出　　处：《煤炭加工与综合利用》2021年第7期62-67,共6页Coal Processing & Comprehensive Utilization

基　　金：国家重点研发计划资助(2017YFB0602304)。

摘　　要：为探索煤直接液化残渣的气化利用途径,以神华煤直接液化残渣及其脱灰残渣制得的半焦为研究对象,利用常压热天平研究了气化温度、CO_(2)配比、残留催化剂及灰分对残渣半焦CO_(2)气化反应特性的影响,采用混合反应模型求取了气化反应动力学参数,并测定了液化残渣半焦CO_(2)气化的煤气组成。结果表明:提高气化温度及CO_(2)配比对提高残渣半焦CO_(2)气化反应速率均具有明显的促进作用;直接液化残渣中残留催化剂及灰分对残渣气化起到了明显的催化作用;直接液化残渣半焦CO_(2)气化煤气中合成气(H_(2)+CO)的含量在66%~78%,煤气低位热值约为8.7~10.0 MJ/m^(3);在不同CO_(2)配比下,直接液化残渣半焦气化的反应速率常数k均随温度的升高而增加,反应总级数介于0.7194~0.7628之间,活化能介于160.98~170.94 kJ/mol之间。In order to explore the way of gasification utilization of coal direct liquefaction residue,this paper takes semi-coke from Shenhua coal direct liquefaction residue and its deashing residue as the research object,The effects of gasification temperature,CO_(2) ratio and residual catalyst on the gasification reaction characteristics of direct liquefaction residue were studied by using the atmospheric pressure thermal balance.The gasification reaction dynamic parameters were obtained by using a mixed reaction model.The gas composition of direct liquefaction residue gasification with CO_(2) was studied as well.The results show that increasing the gasification temperature and the ratio of CO_(2) has a significant promoting effect on the gasification reaction rate of residual semi-coke and CO_(2).The residual catalyst and ash in the direct liquefaction residue play an obvious catalytic role in the gasification of the residue.The content of H_(2)+CO in the gas produced by direct liquefaction residue semi-coke gasified with CO_(2) ranges from 66%to 78%,the low calorific value of the gas is about 8.7 MJ/m^(3) to 10.0MJ/m^(3).The reaction rate constant k of direct liquefaction residue semi-coke increases with the increase of temperature under different CO_(2)ratio,and the total reaction order is between 0.7194 to 0.7628.The activation energy ranges from 160.98 to 170.94 kJ/mol.

关 键 词：煤 直接液化 残渣半焦 二氧化碳 气化特性 动力学 

分 类 号：TQ031.3[化学工程]