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

Abstract

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.

Publication DOI: https://doi.org/10.1016/j.fuel.2018.07.044
Divisions: College of Engineering & Physical Sciences
Additional Information: © 2018, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords: Adsorbent,CaO,CO capture,KIT-6,Mesoporous silica,Chemical Engineering(all),Fuel Technology,Energy Engineering and Power Technology,Organic Chemistry
Publication ISSN: 1873-7153
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.sci ... 2432?via%3Dihub (Publisher URL)
PURE Output Type: Article
Published Date: 2019-01-01
Published Online Date: 2018-08-30
Accepted Date: 2018-07-09
Authors: Sun, Hongman
Parlett, Christopher M.A. (ORCID Profile 0000-0002-3651-7314)
Isaacs, Mark A.
Liu, Xiaotong
Adwek, George
Wang, Jianqiao
Shen, Boxiong
Huang, Jun
Wu, Chunfei

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