ATP基分子筛膜支撑体的制备及性能研究  

Preparation and synthesis of zeolite on surface of ATP support

作　　者：李波 王柳青 李红玑 刁佳琦 张建民 赵孟肖 LI Bo;WANG Liu-qing;LI Hong-ji;DIAO Jia-qi;ZHANG Jian-min;ZHAO Meng-xiao(College of Town Planning&Municipal Engineering,Xi′an Polytechnic University,Xi′an 710048,Shaanxi Province,China)

机构地区：[1]西安工程大学城市规划与市政工程学院,陕西西安710048

出　　处：《化学工程》2021年第9期9-14,共6页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(21573171);陕西省重点研发计划(2021SF-438);陕西省教育厅专项科研计划(17JK0327);西安工程大学博士科研启动基金(BS201932)。

摘　　要：以天然凹凸棒石(ATP)为骨料,用干压成型和固态粒子法制备多孔ATP基支撑体,研究煅烧温度、造孔剂添加量、成型压力等对支撑体性能的影响,在其表面成功合成出NaA分子筛膜。通过X射线粉末衍射(XRD)、扫描电镜(SEM)、热重-微分热重(TG-DTG)对支撑体及表面膜的结构、形貌和热稳定性进行表征。结果表明:支撑体经600℃下煅烧2 h抗压强度为30.6 MPa,孔隙率为32.46%,耐酸、碱度为93.00%和99.23%。ATP基支撑体纵断面SEM结果表明:ATP骨料颗粒排列致密,造孔剂烧失后形成多孔结构,孔径约为15μm。经盐酸表面改性后,支撑体表面合成出四方体晶型的NaA分子筛。Using natural attapulgite(ATP)as aggregate,porous ATP support was prepared by dry compression molding and solid particle method.The effects of calcination temperature,pore forming agent dosage and molding pressure on the performance of support were studied,and NaA molecular sieve membrane was successfully synthesized on its surface.The structure,morphology and thermal stability of the support and surface film were characterized by X ray diffraction(XRD),scanning electron microscopy(SEM)and thermogravimetric differential thermogravimetry(TG-DTG).The results show that the compressive strength of the support calcined at 600℃for 2 h is 30.6 MPa,the porosity is 32.46%,and the acid and alkali resistance is 93.00%and 99.23%.SEM results of ATP support show that the ATP aggregate particles are arranged compactly,and the pores formed after the loss of pore forming agent are obvious,and the pore size is about 15μm.After surface modification with hydrochloric acid,NaA molecular sieve with tetragonal crystal was synthesized on the surface of the support.

关 键 词：凹凸棒石 支撑体 NAA分子筛膜 固态粒子烧结法 孔隙率 

分 类 号：TQ426.6[化学工程]