Attrition resistance of calcium oxide–copper oxide–cement sorbents for post-combustion carbon dioxide capture

Attrition resistance of calcium oxide–copper oxide–cement sorbents for post-combustion carbon dioxide capture

Type	Journal Article
Author	P. Asiedu-Boateng
Author	R. Legros
URL	http://www.sciencedirect.com/science/article/pii/S0921883116300139
Volume	27
Issue	2
Pages	786-795
Publication	Advanced Powder Technology
Date	March 2016
Abstract	Integrating calcium looping (CaL) and chemical looping combustion (CLC) is more energy efficient than conventional technology for post-combustion CO2 capture. Mixtures of CaO, CuO and cement (cem) are promising sorbents but attrition losses due to abrasion and fragmentation may incur an unacceptable economic penalty. Researchers examined the attrition resistance of many fluidized bed powders with a jet mill at orifice velocities from 180 m s - 1 to sonic velocity. The attrition resistance of calcium oxide–copper oxide–cement sorbents and crushed cadomin limestone are poorer than vanadyl pyrophosphate (VPP) and fluid catalytic cracking catalyst (FCC). The attrition rates of VPP and FCC at an orifice gas velocity of 180 m s−1 were 5 mg h−1 and 7 mg h−1, respectively; it was 10 mg h−1 for powders with a mass fraction of 50 % CuO 40 % CaO and 10 % cement. The (CaO)90cem fragments to smaller sister particles and produces fines but the fines collected overhead in the thimble filter decreases with temperature.