摘要
构建基于稀土超稳Y型分子筛的催化热解体系,并对多种聚烯烃塑料进行催化热解实验。结果表明,ReUSY分子筛表现出最优催化性能。利用热重-红外联用实时在线产物分析技术,发现加入ReUSY分子筛显著降低了聚烯烃的热解初始和终止温度,同时减少了产物中芳烃与积炭的比例,有效提高了低碳烃产率。通过Coats-Redfern法对催化热解反应动力学进行研究,分析催化热解在不同阶段的活化能,表明催化热解反应的平均活化能为(56.23~69.12)kJ·mol^(-1)。相较传统热解实验,ReUSY显著降低了催化热解反应的活化能。
We have established a catalytic pyrolysis system using rare-earth modified ultra-stable Y-type zeolite(ReUSY),and conducted catalytic pyrolysis experiments on various polyolefin plastics based on this system.The results demonstrated the superior catalytic performance of ReUSY zeolite among the tested catalysts.Utilizing the technique of thermogravimetric analysis coupled with real-time online infrared product analysis,it is observed that the incorporation of ReUSY zeolite significantly reduced the pyrolysis onset and termination temperatures of polyolefins,while concurrently decreasing the proportion of aromatic hydrocarbons and carbonaceous deposits,thereby enhancing the yield of low-carbon hydrocarbons.Furthermore,an investigation of the catalytic pyrolysis reaction kinetics was conducted using the Coats-Redfern method,wherein the activation energy during different stages of the catalytic pyrolysis process was analyzed.The average activation energy for the catalytic pyrolysis reaction ranged(56.23-69.12)kJ·mol^(-1).Compared to conventional pyrolysis experiments,the incorporation of ReUSY zeolite remarkably lowered the activation energy of the catalytic pyrolysis reaction.
作者
郭荣杰
樊平
纪红兵
薛灿
Guo Rongjie;Fan Ping;Ji Hongbing;Xue Can(Fine Chemical Industry Research Institute,School of Chemistry,Sun Yat-Sen University,Guangzhou 510275,Guangdong,China;School of Chemical Engineering and Technology,Sun Yat-Sen University,Zhuhai 519082,Guangdong,China;Huizhou Research Institute,Sun Yat-sen University,Huizhou 516081,Guangdong,China)
出处
《工业催化》
CAS
2023年第10期88-94,共7页
Industrial Catalysis
基金
国家重点研发计划(2020YFA0210900)
广东省基础与应用基础研究基金(2023A1515012710)
国家自然科学基金资助项目(22278451,21938001)。
