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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received July 30, 2008
Accepted September 22, 2008

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Desulfurization using ZnO nanostructure prepared by matrix assisted method

Tae Jin Lee In Hak Cho No-Kuk Park^1†

School of Chemical Engineering and Technology, Yeungnam University, 214-1 Dae-dong, Gyeongsan, Gyeongbuk 712-749, Korea ¹Institute of Clean Technology, Yeungnam University, 214-1 Dae-dong, Gyeongsan, Gyeongbuk 712-749, Korea

Korean Journal of Chemical Engineering, March 2009, 26(2), 582-586(5), 10.1007/s11814-009-0099-5

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Abstract

A ZnO nanostructure having a high surface area was developed for use as a desulfurization sorbent. The ZnO nanostructure was prepared by using zinc acetate and activated carbon by the matrix-assisted method. Activated carbon was the matrix in the matrix-assisted method and zinc acetate was the precursor. The desulfurization tests of the ZnO nanostructure were carried out in a packed bed desulfurization system in the temperature range of 300-500 ℃. The ZnO nanostructures before and after the sulfidation process were characterized by BET, XRD and SEM. The formulated ZnO nanostructure consisted of ZnO nanoparticles with a size of 10-20 nm and its surface area was very high. Therefore, the sulfur capture efficiency of the ZnO nanostructure was 3 times higher than that of commercial ZnO. However, a reduction of some of the ZnO occurred because of the reducibility of the coal-derived gas, and the surface area of the ZnO nanostructure was slightly reduced due to the sintering of ZnO. It was also confirmed that the silica and alumina containing activated carbon used as the matrix prevent the thermal sintering of ZnO in the sulfidation process at high temperature.

Keywords

ZnO Nanostructure Ultra Cleanup Coal Gas Matrix-assisted Method Activated Carbon

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