標題: Facile and surfactant-free route to mesoporous silica-based adsorbents from TFT-LCD industrial waste powder for CO2 capture
作者: Lin, Liang-Yi
Bai, Hsunling
環境工程研究所
Institute of Environmental Engineering
關鍵字: Surfactant-free;Mesoporous silica;TFT-LCD waste powder;CO2 adsorption
公開日期: 1-四月-2013
摘要: A surfactant-free preparation of mesoporous silica spherical particles, MSPs was developed using sodium silicate extracted from TFT-LCD industrial waste powder via aerosol spray route in this study. Inorganic acids including hydrochloric acids and nitric acids were employed to acidify the silicate supernatant to form activated silica precursors and the influence of acids in the activated silica precursors was studied. The MSPs(HNO3), which was synthesized in the presence of nitric acids exhibited high surface area (776 m(2)/g), mesopore size (5.3 nm) as well as large pore volume (1.15 cm(3)/g) and it was further applied as a support of adsorbent for CO2 capture. It was demonstrated that tetraethylenepentamine (TEPA)-impregnated MSPs(HNO3) adsorbent presents advantages of convenient synthesis, low cost and high adsorption performance (122 mg-CO2/g-adsorbent), which was superior to those of TEPA-SBA-15 and TEPA-MCM-41 manufactured from pure silica chemicals under the same test conditions. The results suggested that low-cost MSPs(HNO3) prepared using silicate solution from TFT-LCD waste powder via spray approach can be promising CO2 adsorbents. This novel process could also be employed for further extensible to other kinds of Si-related industrial wastes and benefit in large-scale production of highly valuable silica-based sorbents for environmental protection applications. (C) 2012 Elsevier Inc. All rights reserved.
URI: http://dx.doi.org/10.1016/j.micromeso.2012.12.019
http://hdl.handle.net/11536/21156
ISSN: 1387-1811
DOI: 10.1016/j.micromeso.2012.12.019
期刊: MICROPOROUS AND MESOPOROUS MATERIALS
Volume: 170
Issue: 
起始頁: 266
結束頁: 273
顯示於類別:期刊論文


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  1. 000315614700032.pdf