High throughput catalytic dechlorination of TCE by hollow fiber nanocomposite membranes with embedded Pd and Pd-Au catalysts

Christopher A. Crock; Reyhan Şengür-Taşdemir; İsmail Koyuncu; Volodymyr V. Tarabara

doi:10.1016/j.seppur.2017.02.015

High throughput catalytic dechlorination of TCE by hollow fiber nanocomposite membranes with embedded Pd and Pd-Au catalysts

Christopher A. Crock, Reyhan Şengür-Taşdemir, İsmail Koyuncu^*, Volodymyr V. Tarabara

^*Corresponding author for this work

Department of Environmental Engineering

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

14 Citations (Scopus)

Abstract

Hollow fiber nanocomposite membranes were fabricated from casting mixtures that included polysulfone (PSf), N-methyl-2-pyrrolidone (NMP), polyethylene glycol (PEG) as well as metallic (Pd) or bimetallic (Pd-Au) nanocatalysts supported on exfoliated graphite nanoplatelets (xGnPs). Morphological, structural, and separation properties of these membranes were characterized and compared with catalyst-free PSf and catalyst-free xGnP/PSf membranes. For all three fillers tested (xGnP, Pd/xGnP, Pd-Au/xGnP), nanocomposite hollow fiber membranes spun with 2.5 cm gap width were significantly (α = 0.1) more permeable than membranes of the same composition but spun with zero gap width. The normalized reactive fluxes of Pd-Au/xGnP/PSf membranes (7.2 ± 1.1 and 6.5 ± 1.2 (m/s)(M_H2)⁻¹(g_Pd/g_PSf)⁻¹) spun with 0 cm and 2.5 cm gap widths were significantly higher than those of Pd/xGnP/PSf membranes (2.0 ± 1.1 and 2.5 ± 0.6 (m/s)(M_H2)⁻¹(g_Pd/g_PSf)⁻¹). The study demonstrates that fabrication of hollow fiber membranes filled with xGnP-supported catalysts is feasible and allows for high throughput dehalogenation of TCE in a flow-through regime. In addition to higher catalytic activity in the TCE dehalogenation reaction, xGnP-supported Pd-Au catalysts demonstrate moderate resistance to poisoning by sulfide.

Original language	English
Pages (from-to)	265-273
Number of pages	9
Journal	Separation and Purification Technology
Volume	179
DOIs	https://doi.org/10.1016/j.seppur.2017.02.015
Publication status	Published - 2017

Bibliographical note

Publisher Copyright:
© 2017 Elsevier B.V.

Funding

This work was supported in part by the NSF Partnerships for International Education and Research grant IIA-1243433, the Scientific and Technological Research Council of Turkey (TÜBİTAK) “Fabrication of Nanocomposite Hollow Fiber (HF) Nanofiltration (NF) Membranes and Their Applications in Drinking Water Treatment” grant 113Y359 and the Paul L. Busch award from the Water Environment Research Foundation.

Funders	Funder number
National Science Foundation	IIA-1243433
Water Environment Research Foundation
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu	113Y359

Keywords

Catalytic membrane reactors
Graphene
Hollow fiber membranes
Palladium
Polymer nanocomposites

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10.1016/j.seppur.2017.02.015

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title = "High throughput catalytic dechlorination of TCE by hollow fiber nanocomposite membranes with embedded Pd and Pd-Au catalysts",

abstract = "Hollow fiber nanocomposite membranes were fabricated from casting mixtures that included polysulfone (PSf), N-methyl-2-pyrrolidone (NMP), polyethylene glycol (PEG) as well as metallic (Pd) or bimetallic (Pd-Au) nanocatalysts supported on exfoliated graphite nanoplatelets (xGnPs). Morphological, structural, and separation properties of these membranes were characterized and compared with catalyst-free PSf and catalyst-free xGnP/PSf membranes. For all three fillers tested (xGnP, Pd/xGnP, Pd-Au/xGnP), nanocomposite hollow fiber membranes spun with 2.5 cm gap width were significantly (α = 0.1) more permeable than membranes of the same composition but spun with zero gap width. The normalized reactive fluxes of Pd-Au/xGnP/PSf membranes (7.2 ± 1.1 and 6.5 ± 1.2 (m/s)(MH2)−1(gPd/gPSf)−1) spun with 0 cm and 2.5 cm gap widths were significantly higher than those of Pd/xGnP/PSf membranes (2.0 ± 1.1 and 2.5 ± 0.6 (m/s)(MH2)−1(gPd/gPSf)−1). The study demonstrates that fabrication of hollow fiber membranes filled with xGnP-supported catalysts is feasible and allows for high throughput dehalogenation of TCE in a flow-through regime. In addition to higher catalytic activity in the TCE dehalogenation reaction, xGnP-supported Pd-Au catalysts demonstrate moderate resistance to poisoning by sulfide.",

keywords = "Catalytic membrane reactors, Graphene, Hollow fiber membranes, Palladium, Polymer nanocomposites",

author = "Crock, {Christopher A.} and Reyhan {\c S}eng{\"u}r-Ta{\c s}demir and İsmail Koyuncu and Tarabara, {Volodymyr V.}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

doi = "10.1016/j.seppur.2017.02.015",

language = "English",

volume = "179",

pages = "265--273",

journal = "Separation and Purification Technology",

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T1 - High throughput catalytic dechlorination of TCE by hollow fiber nanocomposite membranes with embedded Pd and Pd-Au catalysts

AU - Crock, Christopher A.

AU - Şengür-Taşdemir, Reyhan

AU - Koyuncu, İsmail

AU - Tarabara, Volodymyr V.

PY - 2017

Y1 - 2017

N2 - Hollow fiber nanocomposite membranes were fabricated from casting mixtures that included polysulfone (PSf), N-methyl-2-pyrrolidone (NMP), polyethylene glycol (PEG) as well as metallic (Pd) or bimetallic (Pd-Au) nanocatalysts supported on exfoliated graphite nanoplatelets (xGnPs). Morphological, structural, and separation properties of these membranes were characterized and compared with catalyst-free PSf and catalyst-free xGnP/PSf membranes. For all three fillers tested (xGnP, Pd/xGnP, Pd-Au/xGnP), nanocomposite hollow fiber membranes spun with 2.5 cm gap width were significantly (α = 0.1) more permeable than membranes of the same composition but spun with zero gap width. The normalized reactive fluxes of Pd-Au/xGnP/PSf membranes (7.2 ± 1.1 and 6.5 ± 1.2 (m/s)(MH2)−1(gPd/gPSf)−1) spun with 0 cm and 2.5 cm gap widths were significantly higher than those of Pd/xGnP/PSf membranes (2.0 ± 1.1 and 2.5 ± 0.6 (m/s)(MH2)−1(gPd/gPSf)−1). The study demonstrates that fabrication of hollow fiber membranes filled with xGnP-supported catalysts is feasible and allows for high throughput dehalogenation of TCE in a flow-through regime. In addition to higher catalytic activity in the TCE dehalogenation reaction, xGnP-supported Pd-Au catalysts demonstrate moderate resistance to poisoning by sulfide.

AB - Hollow fiber nanocomposite membranes were fabricated from casting mixtures that included polysulfone (PSf), N-methyl-2-pyrrolidone (NMP), polyethylene glycol (PEG) as well as metallic (Pd) or bimetallic (Pd-Au) nanocatalysts supported on exfoliated graphite nanoplatelets (xGnPs). Morphological, structural, and separation properties of these membranes were characterized and compared with catalyst-free PSf and catalyst-free xGnP/PSf membranes. For all three fillers tested (xGnP, Pd/xGnP, Pd-Au/xGnP), nanocomposite hollow fiber membranes spun with 2.5 cm gap width were significantly (α = 0.1) more permeable than membranes of the same composition but spun with zero gap width. The normalized reactive fluxes of Pd-Au/xGnP/PSf membranes (7.2 ± 1.1 and 6.5 ± 1.2 (m/s)(MH2)−1(gPd/gPSf)−1) spun with 0 cm and 2.5 cm gap widths were significantly higher than those of Pd/xGnP/PSf membranes (2.0 ± 1.1 and 2.5 ± 0.6 (m/s)(MH2)−1(gPd/gPSf)−1). The study demonstrates that fabrication of hollow fiber membranes filled with xGnP-supported catalysts is feasible and allows for high throughput dehalogenation of TCE in a flow-through regime. In addition to higher catalytic activity in the TCE dehalogenation reaction, xGnP-supported Pd-Au catalysts demonstrate moderate resistance to poisoning by sulfide.

KW - Catalytic membrane reactors

KW - Graphene

KW - Hollow fiber membranes

KW - Palladium

KW - Polymer nanocomposites

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DO - 10.1016/j.seppur.2017.02.015

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AN - SCOPUS:85013344035

SN - 1383-5866

VL - 179

SP - 265

EP - 273

JO - Separation and Purification Technology

JF - Separation and Purification Technology

ER -

High throughput catalytic dechlorination of TCE by hollow fiber nanocomposite membranes with embedded Pd and Pd-Au catalysts

Abstract

Bibliographical note

Funding

Keywords

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