A Study on Toxic Acidic Vapor Removal Behaviors of Continuously Nanostructured Copper/Nickel-Coated Nanoporous Carbons

Byung-Joo Kim,Soo-Jin Park,Hye-Min Lee,Kyong-Min Bae,Shin-Jae Kang

doi:10.1155/2015/546720

Byung-Joo Kim, Soo-Jin Park + Show 3 more

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https://doi.org/10.1155/2015/546720

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Abstract

Nanostructured copper (Cu)/nickel- (Ni-) coated nanoporous carbon sheets (NCS) were prepared to improve the toxic acidic vapor (hydrogen chloride, HCl) removal efficiency of NCS using a continuous bimetal electroplating method at various metal content ratios. The surface morphology and nanostructure of Cu/Ni-NCS were observed by scanning electron microscopy and X-ray diffraction, respectively. N2/77 K adsorption isotherms were investigated using the Brunauer-Emmett-Teller equation. HCl vapor removal efficiency was confirmed using two types of detection techniques: a gas detecting tube for low concentrations and gas chromatography for high concentrations. HCl removal efficiency was improved mainly in the copresence of nanostructured Cu/Ni clusters compared to the efficiencies of the as-received and single-metal-plated NCS. In particular, the removal efficiency of Cu/Ni-3 was increased by 270% compared to that of as-received sample, but Cu/Ni-5 showed lower efficiency than Cu/Ni-3, indicating that suitable metal composition on NCS can accelerate HCl removal behaviors of the NCS.

Highlights

Hydrogen chloride (HCl) vapor is a by-product of various incineration processes and a serious contributor to atmospheric pollution, such as smog and acid rain
HCl vapor is changed to liquid HCl acid, which is very toxic, eroding metals, inducing cancer, and acting as a precursor to dioxin in the burning of garbage (EPA’s permissible exposure limit value is 4.7 ppm)
This paper reports the effects of bimetallic catalysts composed of Cu and Ni clusters on porous carbon sheets in the removal of HCl vapor

Summary

Introduction

Hydrogen chloride (HCl) vapor is a by-product of various incineration processes and a serious contributor to atmospheric pollution, such as smog and acid rain. Nanoporous carbon sheets (NCS) are promising material for the removal of gas-phase pollutants [2,3,4,5,6,7,8,9], such as nitric oxides (NOx) [3, 5], sulfuric oxides (SOx) [1, 6, 8, 10], carbon dioxide (CO2), and even HCl [1, 9,10,11,12] vapor. The removal efficiency can be enhanced dramatically for several pollutants by adding a small content of active materials, such as functional groups or metal salts on the NCS [1, 2, 10,11,12,13]

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