CaO-based sorbent can capture CO<sub>2</sub> in calcination/carbonation cycle effectively. However, with the increase of cycle numbers, the efficiency declined dramatically, and the sintering of CaO became extremely serious. In order to improve the efficiency of recirculated CaO, here we have used the attapulgite to modify CaO-based sorbent. The attapulgite is a typical one dimensional material with fibrous/rod-like structure and high porosity. The attapulgite/CaO-based composite sorbent was prepared by ultrasonic agitation to make attapulgite cpvered the surface of the limestone. After modification, the porosity of sorbent was increased, and it keep its porous surface without serious sintering after several cycles. Our results showed the anti-sintering and efficiency have been improved greatly by using attapulgite to modify CaO-based absorbent with certain adding amount.

Experiment on CO<sub>2</sub> capturing capacity of attapulgite modified CaO-based sorbent in calcination/carbonation cycle

249th National Meeting (2015)

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Experiment on CO2 capturing capacity of attapulgite modified CaO-based sorbent in calcination/carbonation cycle

Experiment on CO₂ capturing capacity of attapulgite modified CaO-based sorbent in calcination/carbonation cycle