eprintid: 5755
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/57/55
datestamp: 2023-11-09 16:17:30
lastmod: 2023-11-09 16:17:30
status_changed: 2023-11-09 16:03:48
type: article
metadata_visibility: show
creators_name: Lai, L.S.
creators_name: Yeong, Y.F.
creators_name: Lau, K.K.
creators_name: Shariff, A.M.
title: CO2 and CH4 permeation through zeolitic imidazolate framework (ZIF)-8 membrane synthesized via in situ layer-by-layer growth: an experimental and modeling study
ispublished: pub
keywords: Ionization of gases; Membranes; Microwave irradiation; Permeation; Scanning electron microscopy; X ray diffraction, Ideal selectivities; Intercrystalline pores; Knudsen diffusion; Layer-by-layer growth; Maxwell-Stefan models; Physical characterization; Support resistance; Zeolitic imidazolate frameworks, Gas permeable membranes
note: cited By 12
abstract: In this work, a general model representing the permeation of CO2 and CH4 through Zeolitic Imidazole Framework-8 (ZIF-8) membrane synthesized via in situ layer-by-layer growth under microwave irradiation is developed. The model is formed based on the pressure drop concept in order to predict the intercrystalline properties of the ZIF-8 membrane according to the experimental permeation data of CO2 and CH4. The model combines Knudsen diffusion, viscous flow and generalized Maxwell-Stefan models, which considered the support resistance, gas diffusivity and intercrystalline pores of the membrane layer. The simulated data are fitted well with the experimental gas permeation results and consistent with the physical characterizations, including X-ray diffraction (XRD) and scanning electron microscopy (SEM). Results showed that, layer-by-layer growth managed to reduce the intercrystalline pores present in the ZIF-8 membrane layer, with the approximate pore radius of 2.1 � 10-7 m and porosity of 1.15 � 10-4. However, the presence of the small pores can significantly affect the performance of the ZIF-8 membrane which resulted in CO2/CH4 ideal selectivity of �1. © The Royal Society of Chemistry.
date: 2015
publisher: Royal Society of Chemistry
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84942133478&doi=10.1039%2fc5ra12813g&partnerID=40&md5=edb1ae82104ae89487f0991aeb5a5dd7
id_number: 10.1039/c5ra12813g
full_text_status: none
publication: RSC Advances
volume: 5
number: 96
pagerange: 79098-79106
refereed: TRUE
issn: 20462069
citation:   Lai, L.S. and Yeong, Y.F. and Lau, K.K. and Shariff, A.M.  (2015) CO2 and CH4 permeation through zeolitic imidazolate framework (ZIF)-8 membrane synthesized via in situ layer-by-layer growth: an experimental and modeling study.  RSC Advances, 5 (96).  pp. 79098-79106.  ISSN 20462069