화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.72, 241-249, April, 2019
DOI10.1016/j.jiec.2018.12.024  Export Citation
Fly ash-derived mesoporous silica foams for CO2 capture and aqueous Nd3+ adsorption
Siqian Zhang, Seenu Ravi, Yu-Ri Lee, Ji-Whan Ahn1, and Wha-Seung Ahn†
  • Department of Chemistry and Chemical Engineering, Inha University, Incheon 402-751, Republic of Korea
  • 1Korea Institute of Geoscience and Mineral Resource (KIGAM), 124 Gwahang-no, Daejeon, 305-350, Republic of Korea
E-mail:
A supernatant solution of the silicate species extracted after alkali fusion of the acid-treated power plant fly ash was used to prepare mesoporous silica foams (MSFS) in acidic condition, where Pluronic P123 and trimethylbenzene (TMB) were used as the structure directing agent and swelling agent, respectively. The MSF was impregnated with polyethyleneimine (PEI) up to 63.2 wt.%, which exhibited CO2 adsorption capacity of 4.7 mmol/g adsorbent at 75 °C,1 bar. Additionally, the MSF after ethylenediaminetetraacetic acid (EDTA) functionalization showed the Nd3+ adsorption capacity of 117 mg/g at the optimal pH of 6, with sufficiently fast kinetics and good recyclability.
Keywords:Mesoporous silica foam;Acid-treated fly ash;Amine-impregnation;CO2capture;Ethylenediaminetetraacetic acid;Nd3+ adsorption
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