Development of Ca/KIT-6 adsorbents for high temperature CO2 capture

FUEL

卷:235

Article

Sun, Hongman¹  Parlett, Christopher M. A.²  Isaacs, Mark A.³  Liu, Xiaotong¹  Adwek, George⁴  Wang, Jianqiao⁴  Shen, Boxiong⁴  Huang, Jun⁵  Wu, Chunfei^1,6,7 

[1] Univ Hull, Sch Engn & Comp Sci, Kingston Upon Hull HU6 7RX, N Humberside, England

[2] Aston Univ, European Bioenergy Res Inst, Birmingham B4 7ET, W Midlands, England

[3] UCL, Dept Chem, London WC1H 0AJ, England

[4] Hebei Univ Technol, Sch Energy & Environm Engn, Tianjin 300401, Peoples R China

[5] Univ Sydney, Sch Chem & Bimol Engn, Sydney, NSW 2037, Australia

[6] Dalian Univ Technol, Minist Educ, Key Lab Ocean Energy Utilizat & Energy Conservat, Dalian 116024, Peoples R China

[7] Queens Univ Belfast, Sch Chem & Chem Engn, Belfast BT7 1NN, Antrim, North Ireland

关键词: CaO;    Mesoporous silica;    KIT-6;    CO2 capture;    Adsorbent;   

DOI  :  10.1016/j.fuel.2018.07.044

来源: Elsevier

【 摘 要 】

The incorporation of CaO into an inert porous solid support has been identified as an effective approach to improve the stability of adsorbents for CO2 capture. In this work, we focus on enhancing the capacity of carbon capture and cyclic stability of CaO by impregnating CaO particles into a three-dimensional mesoporous silica (KIT-6) support. At a low CaO loading, the three-dimensional mesoporous support was filled with CaO nano-particles. The further increase of CaO loading resulted in the aggregation of CaO particles on the external surface of the support material, as identified by electron microscopy analysis. These CaO/KIT-6 adsorbents show excellent high-temperature CO2 carbonation/calcination stability over multiple cycles of CaO carbonation and calcination. The enhancement of the performance of carbon capture is attributed to the interaction between CaO and the silica skeleton of KIT-6 through the formation of interfacial CaSiO3 and Ca2SiO4 which enhanced the resistance of CaO sintering.

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