5A分子筛催化三辛胺盐酸盐热解过程工艺研究  

Thermal Dissociation of Trioctylamine Hydrochloride Catalyzed by 5A Molecular Sieve

作　　者：唐梦亚 刘程琳[1] 杨颖[1] 陈杭[1] 宋兴福[1] 李平[1] TANG Mengya;LIU Chenglin;YANG Ying;CHEN Hang;SONG Xingfu;LI Ping(Engineering Research Center of Resources(Salt Lake)Process Engineering,Ministry of Education,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学资源(盐湖)过程工程教育部工程研究中心,上海200237

出　　处：《华东理工大学学报（自然科学版）》2022年第5期585-590,共6页Journal of East China University of Science and Technology

基　　金：国家重点研发计划:CO_(2)矿化含氯水溶钙镁废渣无害化处理回收氯关键技术(2018YFB0605703)。

摘　　要：制碱含钙废液与CO_(2)反应-萃取-结晶耦合工艺低成本运行的关键在于有机胺有效再生。以5A分子筛为有机胺盐酸盐热解催化剂,考察有机胺盐酸盐热解过程的影响参数并对其进行优化。结果表明:提高热解温度和载气流量、增大稀释剂和催化剂用量,热解反应速率加快,转化率提高。综合考虑转化率和能耗,选择的优化工艺参数为:反应温度180℃,载气流量300 mL/min,转速150 r/min,三辛胺盐酸盐和十氢萘与5A分子筛的质量比分别为1∶4和10∶1。在此最优工艺条件下,反应4 h时转化率达95%、8 h时转化率为99%。5次循环实验的结果表明:5A分子筛具有良好的催化活性。Coupled process of mineralization of CaCl_(2) waste by reaction extraction crystallization will be beneficial for waste recycling and mineralization of CO_(2),which has a broad application prospect.The key to low cost operation of reaction-extraction-crystallization coupling mineralization process is the effective regeneration of organic amine extractant.Solid acid catalyst is used to strengthen the pyrolysis regeneration process to realize the regeneration of organic amine.At the same time,the coupled process also produce valuable HCl gas,improving the economy value of the process.The effect of heating temperature,carrier gas flow,stirring speed,diluent amount and catalyst amount on the thermal dissociation of trioctylamine hydrochloride by 5A molecular sieve were investigated.The results showed that the pyrolysis of trioctylamine hydrochloride catalyzed by 5A molecular sieve conformed to the first-order kinetic model.The thermal dissociation reaction rate was accelerated and the conversion rate increased with the increasing of thermal dissociation temperature,carrier gas flow,diluent naphthalene and catalyst amount,and the effect of rotational speed on the thermal dissociation reaction was not obvious.Considering the conversion rate and energy consumption,the optimized pyrolysis conditions were as follows:reaction temperature 180℃,carrier gas flow 300 mL/min,rotating speed 150 r/min,mass ratio of triactylamine hydrochloride and naphthalene to 5A molecular sieve 1∶4 and 10∶1,respectively.Under the optimal conditions,the conversion rate reached 95%at 4 h and 99%at 8 h.The results of five cycles experiments showed that 5A molecular zeolite still had good catalytic activity.

关 键 词：三辛胺盐酸盐 5A分子筛 热解 固体酸 

分 类 号：TQ11[化学工程—无机化工]