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

H₂/CO₂ separation, support functionalization and ion exchange

verfasst von

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).

Organisationseinheit(en)

Institut für Physikalische Chemie und Elektrochemie

Typ

Artikel

Journal

International Journal of Hydrogen Energy

Band

42

Seiten

279-288

Anzahl der Seiten

10

ISSN

0360-3199

Publikationsdatum

05.01.2017

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Erneuerbare Energien, Nachhaltigkeit und Umwelt, Feuerungstechnik, Physik der kondensierten Materie, Energieanlagenbau und Kraftwerkstechnik

Ziele für nachhaltige Entwicklung

SDG 7 – Erschwingliche und saubere Energie

Elektronische Version(en)

https://doi.org/10.1016/j.ijhydene.2016.10.161 (Zugang: Geschlossen)