Abstract
CO 2 , one of the main components of greenhouse gases, increased rapidly because of the growing use of fossil fuels. And CaO sorbents possess the capability to be used in capture of CO 2 at high temperature. In the work, Ca Al complex oxides derived from citrate and stearate intercalated layered double hydroxides were fabricated and their CO 2 adsorption capacity was compared with that from CO 3 2– intercalated layered double hydroxides. The results presented that the sorbents (Ca/Al = 5) with Ca Al citrate layered double hydroxides as precursors performed best and displayed remarkable CO 2 capture capacity of 52.0% (mass) at the carbonization temperature of 600 °C without distinct recession during cycling adsorption/desorption tests. The excellent CO 2 adsorption capacity of the sorbent was ascribed to its smaller crystallite size of calcinated particles, optimized pore size distribution as well as homogeneous distributed Ca and Al in the sorbent.
Published Version
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