文献类型：期刊文献

中文题名：沉淀剂对负载型氧化铜的合成及热分解反应动力学的影响

英文题名：Effect of precipitant on synthesis and thermal decomposition kinetics of supported copper oxide

作者：李立杰[1];吴文娟[2];谭慧玲[2];吕珏[2];宁春利[2];曾义红[2];李瑞江[1]

机构：[1]华东理工大学大型工业反应器工程教育部工程研究中心,上海200237;[2]上海化工研究院有限公司,上海200062

年份：2026

卷号：55

期号：2

起止页码：322

中文期刊名：应用化工

外文期刊名：Applied Chemical Industry

收录：;北大核心:【北大核心2023】；

基金：上海市“科技创新行动计划”启明星项目(22QB1402600)。

语种：中文

中文关键词：沉淀剂;氧化铝载体;氧化铜;非等温动力学

外文关键词：precipitant;alumina supporter;copper oxide;non-isothermal kinetics

摘要：以3种碱性化合物为沉淀剂,通过化学沉淀法制备了CuO/Al_(2)O_(3)催化剂。采用X射线衍射(XRD)和扫描电镜(SEM)方法分析热分解后催化剂的物相组成,用热重分析(TG/DTG)和差示扫描量热(DSC)技术对其进行热分解过程研究。使用Flynn-Wall-Ozawa(FWO)和Kissinger-Akahira-Sunose(KAS)两种方法进一步研究催化剂的热分解动力学,得到3种沉淀剂制备的催化剂热分解反应活化能。结果表明,NaOH作为沉淀剂催化剂的粒径和热分解活化能最小,活化能仅为134.20 kJ/mol;Na_(2)CO_(3)为沉淀剂催化剂的颗粒更规整,分散性更好,活化能为156.09 kJ/mol;氨水作为沉淀剂时,催化剂的粒径和热分解活化能最大,活化能为175.26 kJ/mol。研究结果表明较小的结晶活化能得到的CuO粒径更小,为催化剂制备沉淀剂的筛选提供有利参考。
The CuO/Al_(2)O_(3)catalyst was prepared by chemical precipitation with three basic compounds as precipitators.The phase composition of the catalyst was analyzed by X-ray diffraction(XRD)and scanning electron microscopy(SEM),and the decomposition process was studied by thermogravimetric analysis(TG/DTG)and differential scanning calorimetry(DSC).Flynn-Wall-Ozawa(FWO)and Kissinger-Akahira-Sunose(KAS)methods were used to further study the thermal decomposition kinetics of the catalyst,and the activation energy of the catalyst prepared by three precipitators was obtained.The results show that the particle size and thermal decomposition activation energy of NaOH as precipitator catalyst are the smallest,and the activation energy is only 134.20 kJ/mol.The particles of Na_(2)CO_(3)as precipitator were more orderly and dispersed,and the activation energy was 156.09 kJ/mol.When ammonia water is used as precipitator,the particle size and activation energy of the catalyst are the largest,and the activation energy is 175.26 kJ/mol.The results show that the CuO particle size is smaller with smaller crystallization activation energy,which provides a favorable reference for the selection of precipitators prepared by catalysts.