An oxygen permeable membrane microreactor with an in-situ deposited Bi1.5Y0.3Sm0.2O3-δ catalyst for oxidative coupling of methane

Nur Hidayati Othman, Zhentao Wu, K. Li*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

In this study, a novel catalytic hollow fibre membrane microreactor (CHFMMR) was developed using a micro-structured La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) hollow fibre as an oxygen separation membrane as well as a functional substrate for in-situ deposition of a Bi1.5Y0.3Sm0.2O3-δ (BYS) catalyst using a sol-gel method for oxidative coupling of methane (OCM) reaction. A nano-thickness BYS catalytic layer (300-500nm) was successfully deposited onto the microchannel walls throughout the whole hollow fibre. The differences in the OCM performances between the in-situ sol-gel prepared CHFMMR and a washcoat CHFMMR are highlighted. The performance of such CHFMMR is found to be strongly dependent on the properties of BYS and the reaction conditions. When the particle size of BYS was reduced to nano-sizes and was uniformly dispersed, the performance of such CHFMMRs changes drastically, in which higher oxygen permeation rate and methane conversion were obtained. A decrease in residence time was observed to give a better C2+ selectivity and C2+ yield, achieving a maximum value of 79% and 39%, respectively at 900°C. To the best of our knowledge, the C2+ yield obtained in this study is the highest value reported so far. The C2+ productivity rate of the in-situ design CHFMMR was observed to be nearly four times higher than that of the washcoat CHFMMR due to the better accessibility of reactants towards lattice/active site of the uniform BYS catalytic layer.

Original languageEnglish
Pages (from-to)182-193
Number of pages12
JournalJournal of Membrane Science
Volume488
DOIs
Publication statusPublished - 5 Aug 2015

Fingerprint

Oxygen permeable membranes
Oxidative Coupling
Methane
hollow
methane
Oxygen
membranes
catalysts
Catalysts
fibers
Membranes
Fibers
oxygen
Polymethyl Methacrylate
Gels
gels
Particle Size
microchannels
Microchannels
productivity

Keywords

  • Ceramic hollow fibre membrane reactor
  • Micro-structured
  • OCM
  • Sol-gel
  • Washcoat

Cite this

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title = "An oxygen permeable membrane microreactor with an in-situ deposited Bi1.5Y0.3Sm0.2O3-δ catalyst for oxidative coupling of methane",
abstract = "In this study, a novel catalytic hollow fibre membrane microreactor (CHFMMR) was developed using a micro-structured La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) hollow fibre as an oxygen separation membrane as well as a functional substrate for in-situ deposition of a Bi1.5Y0.3Sm0.2O3-δ (BYS) catalyst using a sol-gel method for oxidative coupling of methane (OCM) reaction. A nano-thickness BYS catalytic layer (300-500nm) was successfully deposited onto the microchannel walls throughout the whole hollow fibre. The differences in the OCM performances between the in-situ sol-gel prepared CHFMMR and a washcoat CHFMMR are highlighted. The performance of such CHFMMR is found to be strongly dependent on the properties of BYS and the reaction conditions. When the particle size of BYS was reduced to nano-sizes and was uniformly dispersed, the performance of such CHFMMRs changes drastically, in which higher oxygen permeation rate and methane conversion were obtained. A decrease in residence time was observed to give a better C2+ selectivity and C2+ yield, achieving a maximum value of 79{\%} and 39{\%}, respectively at 900°C. To the best of our knowledge, the C2+ yield obtained in this study is the highest value reported so far. The C2+ productivity rate of the in-situ design CHFMMR was observed to be nearly four times higher than that of the washcoat CHFMMR due to the better accessibility of reactants towards lattice/active site of the uniform BYS catalytic layer.",
keywords = "Ceramic hollow fibre membrane reactor, Micro-structured, OCM, Sol-gel, Washcoat",
author = "Othman, {Nur Hidayati} and Zhentao Wu and K. Li",
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An oxygen permeable membrane microreactor with an in-situ deposited Bi1.5Y0.3Sm0.2O3-δ catalyst for oxidative coupling of methane. / Othman, Nur Hidayati; Wu, Zhentao; Li, K.

In: Journal of Membrane Science, Vol. 488, 05.08.2015, p. 182-193.

Research output: Contribution to journalArticle

TY - JOUR

T1 - An oxygen permeable membrane microreactor with an in-situ deposited Bi1.5Y0.3Sm0.2O3-δ catalyst for oxidative coupling of methane

AU - Othman, Nur Hidayati

AU - Wu, Zhentao

AU - Li, K.

PY - 2015/8/5

Y1 - 2015/8/5

N2 - In this study, a novel catalytic hollow fibre membrane microreactor (CHFMMR) was developed using a micro-structured La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) hollow fibre as an oxygen separation membrane as well as a functional substrate for in-situ deposition of a Bi1.5Y0.3Sm0.2O3-δ (BYS) catalyst using a sol-gel method for oxidative coupling of methane (OCM) reaction. A nano-thickness BYS catalytic layer (300-500nm) was successfully deposited onto the microchannel walls throughout the whole hollow fibre. The differences in the OCM performances between the in-situ sol-gel prepared CHFMMR and a washcoat CHFMMR are highlighted. The performance of such CHFMMR is found to be strongly dependent on the properties of BYS and the reaction conditions. When the particle size of BYS was reduced to nano-sizes and was uniformly dispersed, the performance of such CHFMMRs changes drastically, in which higher oxygen permeation rate and methane conversion were obtained. A decrease in residence time was observed to give a better C2+ selectivity and C2+ yield, achieving a maximum value of 79% and 39%, respectively at 900°C. To the best of our knowledge, the C2+ yield obtained in this study is the highest value reported so far. The C2+ productivity rate of the in-situ design CHFMMR was observed to be nearly four times higher than that of the washcoat CHFMMR due to the better accessibility of reactants towards lattice/active site of the uniform BYS catalytic layer.

AB - In this study, a novel catalytic hollow fibre membrane microreactor (CHFMMR) was developed using a micro-structured La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) hollow fibre as an oxygen separation membrane as well as a functional substrate for in-situ deposition of a Bi1.5Y0.3Sm0.2O3-δ (BYS) catalyst using a sol-gel method for oxidative coupling of methane (OCM) reaction. A nano-thickness BYS catalytic layer (300-500nm) was successfully deposited onto the microchannel walls throughout the whole hollow fibre. The differences in the OCM performances between the in-situ sol-gel prepared CHFMMR and a washcoat CHFMMR are highlighted. The performance of such CHFMMR is found to be strongly dependent on the properties of BYS and the reaction conditions. When the particle size of BYS was reduced to nano-sizes and was uniformly dispersed, the performance of such CHFMMRs changes drastically, in which higher oxygen permeation rate and methane conversion were obtained. A decrease in residence time was observed to give a better C2+ selectivity and C2+ yield, achieving a maximum value of 79% and 39%, respectively at 900°C. To the best of our knowledge, the C2+ yield obtained in this study is the highest value reported so far. The C2+ productivity rate of the in-situ design CHFMMR was observed to be nearly four times higher than that of the washcoat CHFMMR due to the better accessibility of reactants towards lattice/active site of the uniform BYS catalytic layer.

KW - Ceramic hollow fibre membrane reactor

KW - Micro-structured

KW - OCM

KW - Sol-gel

KW - Washcoat

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JO - Journal of Membrane Science

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