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Activated carbon fibers modified by metal oxide as effective structured adsorbents for acetaldehyde

Paper ID Volume ID Publish Year Pages File Format Full-Text
53734 46981 2015 7 PDF Available
Title
Activated carbon fibers modified by metal oxide as effective structured adsorbents for acetaldehyde
Abstract

•Activated carbon fibers (ACFs) as structure adsorbents for acetaldehyde removal.•Metal oxide nanoparticles (<2 nm) deposition on ACF via wetness impregnation.•5-Fold increase of ACF adsorption capacity upon MgO nanoparticles deposition.

Novel efficient adsorbents for acetaldehyde removal from diluted gas streams (∼1300 ppmv) have been developed. The adsorbents combine the properties of activated carbon fibers (ACF) and nanoparticles (NPs) of basic metal oxides (La2O3, CaO, MgO, ZnO, Al2O3). The adsorbents have been prepared by wetness impregnation of ACF using different precursors. The NPs are well dispersed and have average particle size below 2 nm. The ACFs-based adsorbents have an open regular macrostructure with low resistance to gas-flow (low pressure drop) and allow fast adsorption without any diffusion resistance. The NPs deposition provides up to 10-fold increase of acetaldehyde amount adsorbed as compared to non-modified ACF. The adsorption capacity increased with the basicity of metal oxides attaining 20 wt.% on La2O3/ACF. The materials are characterized by different techniques including temperature-programmed desorption (TPD) and high resolution scanning transmission electron microscopy (HRSTEM).

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Keywords
Activated carbon fibers; Basic metal oxide nanoparticles; Acetaldehyde adsorption; Structured adsorbent
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Activated carbon fibers modified by metal oxide as effective structured adsorbents for acetaldehyde
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 249, 1 July 2015, Pages 252–258
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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