On-stream modification of MFI zeolite membranes for enhancing hydrogen separation at high temperature

Xuehong Gu; Zhong Tang; Junhang Dong

doi:10.1016/j.micromeso.2007.08.039

On-stream modification of MFI zeolite membranes for enhancing hydrogen separation at high temperature

Xuehong Gu, Zhong Tang, Junhang Dong

University of Cincinnati

科研成果: 期刊稿件 › 文章 › 同行评审

97 引用（Scopus）

摘要

α-Alumina-supported MFI zeolite membranes were modified by on-stream catalytic thermal cracking of methyldiethoxysilane (MDES) molecules inside the zeolitic channels during the separation of H₂/CO₂ gas mixture at 450 °C and atmospheric pressure. The MDES vapor was carried by the H₂/CO₂ feed gas and the effect of modification was monitored continuously through online analysis of the permeate stream. The modified membrane exhibited a significant increase in H₂ selectivity over CO₂ with a moderate decrease in H₂ permeance. At 450 °C, the modified MFI membrane obtained a H₂/CO₂ permselectivity of 17.5 with H₂ single gas permeance of 1.86 × 10^-7 mol m^-2 s^-1 Pa^-1 as compared to a permselectivity of 2.78 and permeance of 2.75 × 10^-7 mol m^-2 s^-1 Pa^-1 for the membrane before modification. The modified membrane also showed good performance and stability in separation of H₂/CO₂ gas mixture containing up to 28.4% water vapor at 450 °C and atmospheric pressure.

源语言	英语
页（从-至）	441-448
页数	8
期刊	Microporous and Mesoporous Materials
卷	111
期	1-3
DOI	https://doi.org/10.1016/j.micromeso.2007.08.039
出版状态	已出版 - 15 4月 2008
已对外发布	是

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title = "On-stream modification of MFI zeolite membranes for enhancing hydrogen separation at high temperature",

abstract = "α-Alumina-supported MFI zeolite membranes were modified by on-stream catalytic thermal cracking of methyldiethoxysilane (MDES) molecules inside the zeolitic channels during the separation of H2/CO2 gas mixture at 450 °C and atmospheric pressure. The MDES vapor was carried by the H2/CO2 feed gas and the effect of modification was monitored continuously through online analysis of the permeate stream. The modified membrane exhibited a significant increase in H2 selectivity over CO2 with a moderate decrease in H2 permeance. At 450 °C, the modified MFI membrane obtained a H2/CO2 permselectivity of 17.5 with H2 single gas permeance of 1.86 × 10-7 mol m-2 s-1 Pa-1 as compared to a permselectivity of 2.78 and permeance of 2.75 × 10-7 mol m-2 s-1 Pa-1 for the membrane before modification. The modified membrane also showed good performance and stability in separation of H2/CO2 gas mixture containing up to 28.4% water vapor at 450 °C and atmospheric pressure.",

keywords = "High temperature, Hydrogen separation, MFI, Modification, Zeolite membrane",

author = "Xuehong Gu and Zhong Tang and Junhang Dong",

year = "2008",

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doi = "10.1016/j.micromeso.2007.08.039",

language = "英语",

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T1 - On-stream modification of MFI zeolite membranes for enhancing hydrogen separation at high temperature

AU - Gu, Xuehong

AU - Tang, Zhong

AU - Dong, Junhang

PY - 2008/4/15

Y1 - 2008/4/15

N2 - α-Alumina-supported MFI zeolite membranes were modified by on-stream catalytic thermal cracking of methyldiethoxysilane (MDES) molecules inside the zeolitic channels during the separation of H2/CO2 gas mixture at 450 °C and atmospheric pressure. The MDES vapor was carried by the H2/CO2 feed gas and the effect of modification was monitored continuously through online analysis of the permeate stream. The modified membrane exhibited a significant increase in H2 selectivity over CO2 with a moderate decrease in H2 permeance. At 450 °C, the modified MFI membrane obtained a H2/CO2 permselectivity of 17.5 with H2 single gas permeance of 1.86 × 10-7 mol m-2 s-1 Pa-1 as compared to a permselectivity of 2.78 and permeance of 2.75 × 10-7 mol m-2 s-1 Pa-1 for the membrane before modification. The modified membrane also showed good performance and stability in separation of H2/CO2 gas mixture containing up to 28.4% water vapor at 450 °C and atmospheric pressure.

AB - α-Alumina-supported MFI zeolite membranes were modified by on-stream catalytic thermal cracking of methyldiethoxysilane (MDES) molecules inside the zeolitic channels during the separation of H2/CO2 gas mixture at 450 °C and atmospheric pressure. The MDES vapor was carried by the H2/CO2 feed gas and the effect of modification was monitored continuously through online analysis of the permeate stream. The modified membrane exhibited a significant increase in H2 selectivity over CO2 with a moderate decrease in H2 permeance. At 450 °C, the modified MFI membrane obtained a H2/CO2 permselectivity of 17.5 with H2 single gas permeance of 1.86 × 10-7 mol m-2 s-1 Pa-1 as compared to a permselectivity of 2.78 and permeance of 2.75 × 10-7 mol m-2 s-1 Pa-1 for the membrane before modification. The modified membrane also showed good performance and stability in separation of H2/CO2 gas mixture containing up to 28.4% water vapor at 450 °C and atmospheric pressure.

KW - High temperature

KW - Hydrogen separation

KW - MFI

KW - Modification

KW - Zeolite membrane

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U2 - 10.1016/j.micromeso.2007.08.039

DO - 10.1016/j.micromeso.2007.08.039

M3 - 文章

AN - SCOPUS:41649091595

SN - 1387-1811

VL - 111

SP - 441

EP - 448

JO - Microporous and Mesoporous Materials

JF - Microporous and Mesoporous Materials

IS - 1-3

ER -

On-stream modification of MFI zeolite membranes for enhancing hydrogen separation at high temperature

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