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

Hongman Sun, Christopher M.A. Parlett, Mark A. Isaacs, Xiaotong Liu, George Adwek, Jianqiao Wang, Boxiong Shen, Jun Huang, Chunfei Wu

    Research output: Contribution to journalArticlepeer-review


    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.

    Original languageEnglish
    Pages (from-to)1070-1076
    Number of pages7
    Early online date30 Aug 2018
    Publication statusPublished - 1 Jan 2019


    • Adsorbent
    • CaO
    • CO capture
    • KIT-6
    • Mesoporous silica


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