Synthesis and Properties of ZSM-5/MCM-41 Composite Zeolite with a Core-shell Structure for Cracking of Supercritical n-dodecane

摘要：

　　A set of ZSM-5/MCM-41 composite zeolite were synthesized hydrothermally with CTAB as a template and ZSM-5 zeolite as a silica source.XRD patterns of ZSM-5/MCM-41zeolites contain the characteristic peaks both of ZSM-5 and MCM-41.TEM images show that ZSM-5 zeolite surface was covered with a MCM-41 thin layer varying the thickness with the crystallization time.The BET specific surface area of the composite zeolite increased with increasing the NaOH concentration up to a maximum at 1.5 M,followed by decreased as the NaOH concentration was increased.Catalytic tests were carried out in a tubular reactor coated with the zeolite on its inner wall at 550℃ and 4 MPa.The ZSM-5/MCM-41 zeolite with a core-shell structure exhibited a higher conversion of supercritical n-dodecane cracking compared to ZSM-5.

关键词： ZSM-5/MCM-41 zeolite Core-shell structures Cracking Alkaline treatment Crystallization

作者: Jindan Na Guozhu Liu Meiling Ji Xuesong Ma Shenlin Hu Li Wang

作者单位: Key Laboratory of Green Chemical Technology of Ministry of Education, School of Chemical Engineering Science and Technology on Scramjet Laboratory, Beijing 100074, China

会议类型: 国际会议

会议名称: the 2012 International Conference on Frontiers of Nanoscience and Technology(2012年纳米科学与技术国际会议(ICFNST 2012))

会议地点: 香港

会议语种:英文

页码: 267-271

在线出版日期: 2012-07-26（万方平台首次上网日期，不代表论文的发表时间）