基于TGA/DTS研究钼基负载型催化剂对神府煤催化热解动力学的影响  

Study of Mo species on pyrolysis kinetics of Shenfu coal based on TGA/DTS

作　　者：马筱娴 陈苏英 赵晓艳 柳娜[2] 张军兴 雷艳艳[2] 周安宁[2] 陈福欣[2] MA Xiao-xian;CHEN Su-ying;ZHAO Xiao-yan;LIU Na;ZHANG Jun-xing;LEI Yan-yan;ZHOU An-ning;CHEN Fu-xin(Xi’an Kedagaoxin University,Xi’an 710109,China;School of chemistry and chemical engineering,Xi’an university of science and technology,Xi’an 710054,China;Yulin Vocational and Technical College,Yulin 719099,China)

机构地区：[1]西安科技大学高新学院,陕西西安710109 [2]西安科技大学化学与化工学院,陕西西安710054 [3]榆林职业技术学院,陕西榆林719000

出　　处：《应用化工》2020年第S02期20-26,共7页Applied Chemical Industry

基　　金：国家自然科学基金(31760016);陕西省科技计划(2017ZDCXL-GY-10-01-02);陕西省重大科技创新项目专项资金计划(2019GY-138,2020GY-236);榆林市2019年科技计划项目(2919-113-03)。

摘　　要：采用热重分析发研究了神府煤及其催化热解动力学,用Kissinger模型和Ozawa模型对神府煤三种情况下(SFC,10%-Mo/Al_(2)O_(3)-SiO_(2)和10%-Mo/3%-P-Al_(2)O_(3)-SiO_(2))进行动力学研究。Kissinger法计算得出3种情况的活化能分别为280.5 kJ/mol,254.9 kJ/mol,254.6 kJ/mol;Ozawa法为278.0 kJ/mol,253.8 kJ/mol,253.6 kJ/mol。在一定程度上解释了催化剂的活化功能,提高了焦油产率。同时根据催化剂的结构特征初步解释了可能的催化机理,为深入研究煤炭的资源化利用提供了参考。The kinetics and pyrolysis mechanism of ShenFu coal are studied by thermogravimetric analyzer,using the method of Kissinger and Ozawa to study the dynamics of ShenFu coal under three conditions(SFC,10%Mo/Al_(2)O_(3)-SiO_(2)and 10%-3%-P-Al_(2)O_(3)-Mo/SiO_(2)).The activation energy of three conditions is calculated by the method of Kissinger were 280.5 kJ/mol,254.9 kJ/mol,254.6 kJ/mol respectively;Ozawa were 278.0 kJ/mol,253.8 kJ/mol,253.6 kJ/mol respectively,it is concluded that the addition of catalyst reduces the activation energy,thus increasing the yield of tar.Catalyst hydrogenation mechanism,first coal pyrolysis is free radical and hydrogen radical and gas.Small free radicals react with hydrogen radical to generate gas and liquid products;The large molecule free radical fragment is produced by the secondary cracking reaction under the action of the active component and generates more free radicals and hydrogen free combination to produce the gas products and liquid products;At the same time,the gaseous product produced by pyrolysis reacts under the action of the active component to produce liquid products and gas,thus increasing the yield of tar and gas.

关 键 词：神府煤 催化热解 热重 热解机理 

分 类 号：TQ02[化学工程]