Improved H2/CO2 separation performance on mixed-linker ZIF-7 polycrystalline membranes

Hao Chang; Yan Wang; Long Xiang; Donghui Liu; Chongqing Wang; Yichang Pan

doi:10.1016/j.ces.2018.07.027

Improved H₂/CO₂ separation performance on mixed-linker ZIF-7 polycrystalline membranes

Hao Chang, Yan Wang, Long Xiang, Donghui Liu, Chongqing Wang, Yichang Pan

College of Chemical Engineering

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

Abstract

Membrane-based hydrogen purification has been considered to be a promising alternative because of its low energy consumption, ease of operation, and cost effectiveness. Amino-functionalized ZIF-7 (ZIF-7-NH₂) is an attractive candidate for membrane gas separation due to the maintenance of pore-opening structure after total removal of guest molecules (DMF). In this work, ZIF-7-NH₂ membrane with improved both H₂ permeance and H₂/CO₂ selectivity than reported mono-ligand ZIF-7 membrane was first prepared. Several activation process for ZIF-7-NH₂ membranes to opening the pores were investigated. It was found that the coating of a Pebax®1657 layer on the surface of ZIF-7-NH₂ membrane is crucial for preventing the formation of cracks during pore-activation procedure. The permeance of H₂ and separation factor for H₂/CO₂ binary mixtures were improved to ∼ 1 × 10⁻⁷ mol/m² s Pa and ∼19, respectively. The separation performance was very close to the upper bound for inorganic microporous membranes. Furthermore, the improved hydrothermal stability on ZIF-7-NH₂ materials endows the membrane is highly potential for hydrogen purification.

Original language	English
Pages (from-to)	85-93
Number of pages	9
Journal	Chemical Engineering Science
Volume	192
DOIs	https://doi.org/10.1016/j.ces.2018.07.027
State	Published - 31 Dec 2018

Keywords

Gas separation
Hydrogen separation
MOF membranes
Metal-organic frameworks
ZIF-7

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.ces.2018.07.027

Cite this

@article{46f191a6e77745ca8e547895f4262273,

title = "Improved H2/CO2 separation performance on mixed-linker ZIF-7 polycrystalline membranes",

abstract = "Membrane-based hydrogen purification has been considered to be a promising alternative because of its low energy consumption, ease of operation, and cost effectiveness. Amino-functionalized ZIF-7 (ZIF-7-NH2) is an attractive candidate for membrane gas separation due to the maintenance of pore-opening structure after total removal of guest molecules (DMF). In this work, ZIF-7-NH2 membrane with improved both H2 permeance and H2/CO2 selectivity than reported mono-ligand ZIF-7 membrane was first prepared. Several activation process for ZIF-7-NH2 membranes to opening the pores were investigated. It was found that the coating of a Pebax{\textregistered}1657 layer on the surface of ZIF-7-NH2 membrane is crucial for preventing the formation of cracks during pore-activation procedure. The permeance of H2 and separation factor for H2/CO2 binary mixtures were improved to ∼ 1 × 10−7 mol/m2 s Pa and ∼19, respectively. The separation performance was very close to the upper bound for inorganic microporous membranes. Furthermore, the improved hydrothermal stability on ZIF-7-NH2 materials endows the membrane is highly potential for hydrogen purification.",

keywords = "Gas separation, Hydrogen separation, MOF membranes, Metal-organic frameworks, ZIF-7",

author = "Hao Chang and Yan Wang and Long Xiang and Donghui Liu and Chongqing Wang and Yichang Pan",

note = "Publisher Copyright: {\textcopyright} 2018",

year = "2018",

month = dec,

day = "31",

doi = "10.1016/j.ces.2018.07.027",

language = "英语",

volume = "192",

pages = "85--93",

journal = "Chemical Engineering Science",

issn = "0009-2509",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Improved H2/CO2 separation performance on mixed-linker ZIF-7 polycrystalline membranes

AU - Chang, Hao

AU - Wang, Yan

AU - Xiang, Long

AU - Liu, Donghui

AU - Wang, Chongqing

AU - Pan, Yichang

PY - 2018/12/31

Y1 - 2018/12/31

N2 - Membrane-based hydrogen purification has been considered to be a promising alternative because of its low energy consumption, ease of operation, and cost effectiveness. Amino-functionalized ZIF-7 (ZIF-7-NH2) is an attractive candidate for membrane gas separation due to the maintenance of pore-opening structure after total removal of guest molecules (DMF). In this work, ZIF-7-NH2 membrane with improved both H2 permeance and H2/CO2 selectivity than reported mono-ligand ZIF-7 membrane was first prepared. Several activation process for ZIF-7-NH2 membranes to opening the pores were investigated. It was found that the coating of a Pebax®1657 layer on the surface of ZIF-7-NH2 membrane is crucial for preventing the formation of cracks during pore-activation procedure. The permeance of H2 and separation factor for H2/CO2 binary mixtures were improved to ∼ 1 × 10−7 mol/m2 s Pa and ∼19, respectively. The separation performance was very close to the upper bound for inorganic microporous membranes. Furthermore, the improved hydrothermal stability on ZIF-7-NH2 materials endows the membrane is highly potential for hydrogen purification.

AB - Membrane-based hydrogen purification has been considered to be a promising alternative because of its low energy consumption, ease of operation, and cost effectiveness. Amino-functionalized ZIF-7 (ZIF-7-NH2) is an attractive candidate for membrane gas separation due to the maintenance of pore-opening structure after total removal of guest molecules (DMF). In this work, ZIF-7-NH2 membrane with improved both H2 permeance and H2/CO2 selectivity than reported mono-ligand ZIF-7 membrane was first prepared. Several activation process for ZIF-7-NH2 membranes to opening the pores were investigated. It was found that the coating of a Pebax®1657 layer on the surface of ZIF-7-NH2 membrane is crucial for preventing the formation of cracks during pore-activation procedure. The permeance of H2 and separation factor for H2/CO2 binary mixtures were improved to ∼ 1 × 10−7 mol/m2 s Pa and ∼19, respectively. The separation performance was very close to the upper bound for inorganic microporous membranes. Furthermore, the improved hydrothermal stability on ZIF-7-NH2 materials endows the membrane is highly potential for hydrogen purification.

KW - Gas separation

KW - Hydrogen separation

KW - MOF membranes

KW - Metal-organic frameworks

KW - ZIF-7

UR - http://www.scopus.com/inward/record.url?scp=85049974011&partnerID=8YFLogxK

U2 - 10.1016/j.ces.2018.07.027

DO - 10.1016/j.ces.2018.07.027

M3 - 文章

AN - SCOPUS:85049974011

SN - 0009-2509

VL - 192

SP - 85

EP - 93

JO - Chemical Engineering Science

JF - Chemical Engineering Science

ER -