聚氯乙烯/松木粉低温共热解脱氯提质特性  

Characteristics of Quality Enhancement and De-Chlorination via Low-Temperature Co-Pyrolysis of PVC and Wood Powder

作　　者：姚佳桂 刘华财[1,2,3] 黄艳琴 武修一 崔杰 阴秀丽 吴创之[1,2,3,4] YAO Jia-gui;LIU Hua-cai;HUANG Yan-qin;WU Xiu-yi;CUI Jie;YIN Xiu-i;WU Chuang-zhi(Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;CAS Key Laboratory of Renewable Energy,Guangzhou 510640,China;Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development,Guangzhou 510640,China;University of Chinese Academy of Sciences,Beijing 100049,China;National Engineering Research Center of New Energy Power Generation,North China Electric Power University,Beijing 102206,China)

机构地区：[1]中国科学院广州能源研究所,广州510640 [2]中国科学院可再生能源重点实验室,广州510640 [3]广东省新能源和可再生能源研究开发与应用重点实验室,广州510640 [4]中国科学院大学,北京100049 [5]华北电力大学新能源发电国家工程研究中心,北京102206

出　　处：《新能源进展》2023年第3期197-204,共8页Advances in New and Renewable Energy

基　　金：国家自然科学基金项目(52176140);中央高校基本科研业务费专项资金项目(2022MS027);广东省科技计划项目(2021A0505030054)。

摘　　要：掌握聚氯乙烯(PVC)和木质纤维素类生物质共热解过程中脱氯提质特性,对开发生活垃圾脱氯预处理技术和实现其无害化具有重要意义。研究了PVC与松木粉(WP)在低温(200~450℃)共热解过程的提质和Cl的迁移转化特性。结果表明,在热解温度为300~350℃时,PVC和WP混合物的脱氯效率可以达到98%以上,对应的能量回收率约为76%。在300℃热解温度下停留15min,超过90%的Cl以HCl形式释放,且HCl释放量随着热解温度升高和停留时间的延长而增加。热解焦油中氯的含量很低,仅为1.80%~3.04%。低温共热解过程中,WP中木质素产生的酚羟基可以促进氯的取代反应,提高脱氯效率。Understanding the de-chlorination and upgrading characteristics during co-pyrolysis of polyvinyl chloride(PVC)and lignocellulosic biomass is of great significance for developing de-chlorination pretreatment technology for municipal solid waste and achieving its harmless treatment.In this paper,the upgrading and migration transformation characteristics of Cl during the low-temperature co-pyrolysis of PVC and pine wood powder(WP)were studied.The migration and transformation characteristics of Cl during the low-temperature co-pyrolysis of PVC and WP were investigated.The results showed that the de-chlorination efficiency of PVC and WP mixture reached over 98%at a pyrolysis temperature of 300-350°C,corresponding to an energy recovery rate of about 76%.At a pyrolysis temperature of 300°C and a residence time of 15 minutes,over 90%of Cl was released in the form of HCl,and the release of HCl increased with increasing pyrolysis temperature and residence time.The chlorine content in the pyrolysis tar was very low,ranging from 1.80%to 3.04%.During low-temperature co-pyrolysis,the phenolic-OH generated by lignin in WP can enhance the substitution reaction of chlorine and improve the de-chlorination efficiency.

关 键 词：PVC 松木粉 低温共热解 脱氯 

分 类 号：TK114[动力工程及工程热物理—热能工程] TE09[石油与天然气工程]