MFI分子筛膜对丁烷异构体分离性能的分级控制

作者：杨超月

本期文章：《德国应用化学》：Online/在线发表

近日，大连理工大学刘毅团队开发了MFI分子筛膜对丁烷异构体分离性能的分级控制策略。相关研究成果于2021年1月07日发表于国际顶尖学术期刊《德国应用化学》。

微结构优化（如厚度和择优取向）是提高沸石膜性能的一个主要问题。

该文中，研究人员证明了分层结构的引入很容易同时实现沸石膜的厚度减小和取向控制。具体而言，在多孔α-al2o3基底上制备了具有更高（h0h）优先取向超薄（约380nm）选择性顶层和多孔中间层的分层MFI沸石膜。在膜处理过程中使用中空结构的MFI纳米针和单模微波加热对于制备具有优异丁烷异构体分离性能的MFI沸石膜是必不可少的，从而超越了目前通过溶液合成方法制备的MFI沸石膜的正/一丁烷选择性与正丁烷渗透性的权衡界限。

附：英文原文

Title: Hierarchy Control of MFI Zeolite Membrane towards Superior Butane Isomer Separation Performance

Author: Yi Liu, Mingrun Li, Zhigang Chen, Yi Cui, Jinming Lu, Yi Liu

Issue&Volume: 07 January 2021

Abstract: Microstructural optimization (e.g., thickness and preferred orientation) represents a major concern for performance enhancement of zeolite membranes. In this study, we demonstrated that the introduction of hierarchy easily enabled concurrent thickness reduction and orientation control of zeolite membranes. Specifically, hierarchical MFI zeolite membranes comprising higher degree of ( h 0 h ) preferentially oriented ultrathin (ca. 380 nm) selective top layers and porous intermediate layers on porous α‐Al 2 O 3 substrates were fabricated. The use of hollow‐structured MFI nanoseeds and the employment of single‐mode microwave heating during membrane processing were found indispensable for the preparation of MFI zeolite membranes with superior butane isomer separation performance, thereby surpassing the current n ‐/ i ‐butane selectivity versus n ‐butane permeance trade‐off limits of MFI zeolite membranes prepared via solution‐based synthetic protocols.

DOI: 10.1002/anie.202017087

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202017087

期刊信息

Angewandte Chemie：《德国应用化学》，创刊于1887年。隶属于德国化学会，最新IF：12.959
官方网址：https://onlinelibrary.wiley.com/journal/15213773
投稿链接：https://www.editorialmanager.com/anie/default.aspx