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

Publication history: Received December 8, 2009
Accepted December 26, 2009

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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Synthesis of mesoporous silica from bottom ash and its application for CO2 sorption

Chao Chen Kwang-Seok You¹ Ji-Whan Ahn¹ Wha-Seung Ahn^†

Department of Chemical Engineering, Inha University, Incheon 402-751, Korea ¹Korea Institute of Geoscience and Mineral Resources, Daejeon 305-350, Korea

whasahn@inha.ac.kr

Korean Journal of Chemical Engineering, March 2010, 27(3), 1010-1014(5), 10.1007/s11814-010-0153-3

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Abstract

A supernatant solution of silicate species extracted from bottom ash in a power plant was used to prepare a mesoporous silica by the synthesis protocol of SBA-15. XRD, N2 adsorption-desorption, and TEM confirmed a disordered mesopore structure. The pore volume and average pore size of the product were significantly larger than SBA-15 prepared using pure chemicals, and complementary textural mesoporosity was detected. When the mesoporous silica was tested for carbon dioxide sorption after polyethyleneimine (PEI) impregnation, substantially higher CO2 sorption capacity (169 mg CO2/g-sorbent) was achieved than that of PEI-impregnated pure SBA-15 under the same test conditions. High CO2 sorption capacity was maintained when the gas composition was changed to 15% CO2, and the hybrid material exhibited satisfactory performances during the 10 recycle runs.

Keywords

Bottom Ash Mesoporous Silica SBA-15 Polyethyleneimine Carbon Dioxide Capture

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