晶化时间及母液循环对SAPO-34分子筛合成的影响  

Effect of Crystallization Time and Mother Liquor Recycling on the Synthesis of SAPO-34 Molecular Sieve

作　　者：申韬艺 刘晨 陈通 王利军[1,2] 乔永民 吴敏昌[3] SHEN Taoyi;LIU Chen;CHEN Tong;WANG Lijun;QIAO Yongmin;WU Minchang(School of Environmental and Materials Engineering,Shanghai Polytechnic University,Shanghai 201209,China;Ningbo Jucai New Material Technology Co.,Ltd.,Ningbo 315311,Zhejiang,China;Shanghai Shanshan Technology Co.,Ltd.,Shanghai 201209,China)

机构地区：[1]上海第二工业大学环境与材料工程学院,上海201209 [2]宁波聚才新材料科技有限公司,浙江宁波315311 [3]上海杉杉科技有限公司,上海201209

出　　处：《上海第二工业大学学报》2021年第1期15-21,共7页Journal of Shanghai Polytechnic University

基　　金：上海第二工业大学研究生项目基金(EGD19YJ0043);宁波市3315资本引才计划(2020C-04-7)资助。

摘　　要：以二乙胺为模板剂采用传统水热法制备SAPO-34分子筛,研究了不同晶化时间下分子筛晶体结构与形貌的变化。以X射线衍射仪(XRD)与扫描电镜(SEM)测试结果确定最佳产物并回收所得晶化母液。以此为初始凝胶环境,在不添加有机模板剂的条件下补充原料制备SAPO-34分子筛。确定了最佳晶化时间,并对两种合成方法所得最佳产物进行了傅里叶红外光谱仪(FTIR)与氨气程序升温脱附(NH3-TPD)测试。结果表明,在200℃条件下传统水热法需48 h得到最佳产物,母液循环法仅需36 h,晶化速度更快。两种方法制备所得分子筛具有相似的骨架结构与酸性,证明母液循环在保证产物一致的前提下加快了制备速度,实现了母液的循环回用与分子筛的绿色合成。The SAPO-34 molecular sieve was prepared by traditional hydrothermal method with diethylamine as the template,and the changes of the molecular sieve crystal structure and morphology under different crystallization time were studied.The X-ray diffractometer(XRD)and scanning electron microscope(SEM)test results were used to determine the best product and recover the crystallization mother liquor.Using mother liquor as the initial gel environment,the SAPO-34 was prepared by supplementing raw materials without adding organic templates,and the optimal crystallization time was determined.Fourier transform infrared spectroscopy(FTIR)and ammonia desorption by programmed temperature(NH3-TPD)were carried out on the both optimal products of the two synthetic methods.The results show that the traditional hydrothermal method takes 48 h to obtain the best product at 200℃,while the mother liquor recycling method only needs 36 h,which has faster crystallization speed.The molecular sieves obtained by the two methods have similar skeleton structures and acidity,which proves that the mother liquor recycling method accelerates the preparation speed while ensuring the consistency of the products,and realizes the mother liquor reuse and green synthesis in the meantime.

关 键 词：SAPO-34分子筛 晶化时间 晶化母液 循环回用 

分 类 号：X703[环境科学与工程—环境工程]