水浴快速制备Sn-Beta分子筛催化葡萄糖产乳酸  

Fast water bath synthesis of Sn-Beta zeolite catalyzed glucose production of lactic acid

作　　者：蔡傲 董文杰 吴随 CAI Ao;DONG Wenjie;WU Sui(College of Energy Environment and Safety Engineering,China Jiliang University,Hangzhou 310018,China;Zhejiang Scientific Research Institute of Transport,Hangzhou 311305,China)

机构地区：[1]中国计量大学能源环境与安全工程学院,浙江杭州310018 [2]浙江省交通运输科学研究院,浙江杭州311305

出　　处：《中国计量大学学报》2024年第3期462-469,495,共9页Journal of China University of Metrology

基　　金：浙江省自然科学基金项目(No.Y21B060027)。

摘　　要：目的:研究一种制备条件温和制备周期短且催化性能良好的多级孔Sn-Beta分子筛催化剂。方法:将二乙酸二丁基锡作为Sn源,与乙醇及四乙基氢氧化铵水溶液,在低温水浴条件下与脱Al后的Beta分子筛反应6 h,在管式炉中煅烧后获得Sn-Beta分子筛,采用XRD、TEM、BET、Py-IR、CO_(2)-TPD等对分子筛的形貌结构和化学性质进行表征。结果:优化了引入Sn源种类、反应介质配比、温度、时间以及Sn负载量等因素对Sn-Beta分子筛催化性能的影响后,投加5 mL水、5 mL乙醇、5 mL TEAOH、300 mg二乙酸二丁基锡在60℃下混合6 h,清洗烘干后550℃煅烧6 h制得了乳酸产率为34.51%的新多级孔Sn-Beta分子筛催化剂。结论:本研究提供了一种快捷简便的Sn-Beta分子筛制备方法。Beta分子筛在水浴反应过程中成功产生了多级孔结构,并且Sn的引入使得催化剂Lewis酸性、Br nsted酸性和催化剂碱性得到优化,提高催化剂的催化性能。Aims:This paper aims to study a multi-pore Sn-Beta zeolite catalyst with mild preparation conditions,short preparation periods and good catalytic performance.Methods:Dibutyltin diacetate was used as the Sn source to combine with ethanol,tetra-ethyl-ammonium hydroxide aqueous solution and de-Al-Beta zeolites under low-temperature water bath conditions;and the Sn-Beta zeolite was obtained after calcination in a tubular furnace.The morphological structures and chemical properties of zeolites were characterized by XRD,TEM,BET,Py-IR,CO_(2)-TPD,etc.Results:After optimizing the effects of the Sn source type,reaction medium ratio,temperature,time and Sn loading capacity on the catalytic performance of SN-Beta zeolites,5 mL water,5 mL ethanol,5 mL TEAOH and 300 mg dibutyltin diacetate were added and mixed at 60℃ for 6 h.A new multi-pore Sn-Beta zeolite catalyst with a lactic acid yield of 34.51% was prepared by calcination at 550℃ for 6 h after cleaning and drying.Conclusions:This study provides a quick and simple method for preparing Sn-Beta zeolites.The multi-level pore structure was successfully created during the water bath reaction.And the introduction of Sn led to the optimization of catalyst Lewis acidity,Br nsted acidity and catalyst basicity,which improved the catalytic performance of the catalyst.

关 键 词：Sn-Beta分子筛 多级孔 催化 乳酸 Lewis酸性 

分 类 号：O643.36[理学—物理化学]