American Chemical Society
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Fabrication of CaO-Based Sorbents for CO2 Capture by a Mixing Method

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journal contribution
posted on 2012-02-07, 00:00 authored by Changlei Qin, Wenqiang Liu, Hui An, Junjun Yin, Bo Feng
Three types of sorbent were fabricated using various calcium and support precursors via a simple mixing method, in order to develop highly effective, durable, and cheap CaO-based sorbents suitable for CO2 capture. The sorption performance and morphology of the sorbents were measured in a thermogravimetric analyzer and a scanning electron microscopy, respectively. The experimental results indicate that cement is a promising low-cost support precursor for contributing to the enhancement of cyclic CO2 sorption capacity, especially when organometallic calcium precursors were used. A sorbent (with 75% CaO content) made from calcium l-lactate hydrate and cement showed the highest CO2 sorption capacity of 0.36 g of CO2/g of sorbent and its capacity decreased only slightly after 70 cycles of carbonation and calcination.