posted on 2012-02-07, 00:00authored byChanglei 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.