On comparing permeation through Matrimid^®-based mixed matrix and multilayer sandwich FAU membranes

H₂/CO₂ separation, support functionalization and ion exchange

authored by

Alexander Mundstock, Sebastian Friebe, Jürgen Caro

Abstract

A series of supported membranes with zeolite FAU either as a thin layer or as powder in Matrimid as Mixed Matrix Membrane (MMM) have been prepared and evaluated in the H₂/CO₂separation. In addition to neat NaX membrane layers, we developed two novel composite materials, namely FAU/Matrimid^®Mixed Matrix Membranes (MMMs) as well as NaX/Matrimid^®multilayer/sandwich membranes, all of them supported by porous alumina plates. The influence of different pre-synthetic support modifications (APTES = 3-aminopropyltrietoxysilane, PDA = polydopamine) on the quality of neat supported NaX membranes grown as layer on these modified supports has been investigated studying the H₂/CO₂separation performance. It could be shown that NaX membrane layers grown on modified supports show an remarkably increased quality and correspondingly higher H₂/CO₂separation factors α (H₂/CO₂) (α = 8.0 for neat NaX, α = 8.9 for NaX/APTES and α = 10.3 for NaX/PDA). In the preparation of MMMs, the separation performance could be improved by ion exchanged Na-FAU powders. Exchanging the Na⁺of the as-synthesized NaX particles for metal ions with higher ionic potentials like Co²⁺, results in enhanced mixed gas separation factors α in the H₂/CO₂separation (NaX/Matrimid^®MMM α = 4.0 and CoX/Matrimid^®MMM α = 5.6).

Organisation(s)

Institute of Physical Chemistry and Electrochemistry

Type

Article

Journal

International Journal of Hydrogen Energy

Volume

42

Pages

279-288

No. of pages

10

ISSN

0360-3199

Publication date

05.01.2017

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment, Fuel Technology, Condensed Matter Physics, Energy Engineering and Power Technology

Sustainable Development Goals

SDG 7 - Affordable and Clean Energy

Electronic version(s)

https://doi.org/10.1016/j.ijhydene.2016.10.161 (Access: Closed)