PTA氧化残渣气化特性及其气化过程中热解脱羧  

Gasification Characteristics of PTA Oxidation Residue and Its Pyrolysis Decarboxylation During Gasification

作　　者：王云亮[1] 张玲玲[2] 付帅明 WANG Yunliang;ZHANG Lingling;FU Shuaiming(Sinopec Yangzi Petrochemical Company Limited,Nanjing 210048,China;College of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310027,China)

机构地区：[1]中国石化扬子石油化工有限公司化工厂,江苏南京210048 [2]浙江大学化学工程与生物工程学院,浙江杭州310027

出　　处：《化学反应工程与工艺》2022年第4期348-354,共7页Chemical Reaction Engineering and Technology

摘　　要：利用热重分析仪及自制的气化热解脱羧装置研究了精对苯二甲酸(PTA)氧化残渣粉料受热气化过程的热失重规律,考察了温度、载气流量以及水含量在残渣气化过程中对芳香酸转化率及产物分布的影响。研究表明:残渣在低温气化过程中热裂解产物主要为苯甲酸,且联苯类比较少,有利于产物分布;随着载气流量增大,气态物料受热时间减少,羧酸的热解转化率降低;高温水汽可以充当氢供体提高热解产物中苯甲酸及苯的含量,抑制其他副产物的生成。适宜的残渣气化工艺操作条件是气化温度为400℃,载气流量为500 mL/min,含水量为30%(质量分数)。Thermogravimetric analyzer and self-made gasification pyrolysis decarboxylation device were used to study the law of weight loss of purified terephthalic acid(PTA)oxidation residue powder during thermal gasification.The effects of temperature,carrier gas flow and water content on the conversion of aromatic acids and product distribution in the process of residue gasification were investigated.The research showed that the pyrolysis product at low-temperature was mainly benzoic acid,and there were few biphenyls,conducive to product distribution.With the increase of carrier gas flow rate,the residence time of gas decreases and the pyrolysis conversion of carboxylic acid decreases.Water vapor could act as hydrogen donor to increased the content of benzoic acid and benzene in pyrolysis products and inhibit the formation of other by-products.The suitable operating conditions of residue gasification process are as follows:gasification temperature 400℃,carrier gas flow 500 mL/min and water content 30%(mass fraction).

关 键 词：精对苯二甲酸 氧化残渣 气化 热解 脱羧 芳烃 

分 类 号：X783[环境科学与工程—环境工程]