Porous spherical calcium aluminate-supported CaO-based pellets manufactured via biomass-templated extrusion-spheronization technique for cyclic CO capture.

Author(s) Li, H.; Hu, Y.; Chen, H.; Qu, M.
Journal Environ Sci Pollut Res Int
Date Published 2019 May 29
Abstract

Calcium looping has been proposed as one of the most promising technologies for CO capture to mitigate the growing problem of global warming. However, the loss in capacity and attrition are two issues lying on the way to practical application for calcium looping process. To improve CO capture performance and mechanical strength of CaO sorbents, a biomass templated extrusion-spheronization palletization technique was employed to manufacture porous calcium aluminate-supported CaO-based pellets. For the first time, this work investigated the granulation of calcium aluminate-supported CaO-based sorbents and also the effectiveness of three novel biomass-based pore-creating materials of straw, willow, and wheat. The results indicated that the incorporation of calcium aluminate-based supports could effectively enhance cyclic performance and stability. Besides, the 5 wt.% addition of pore-creating materials could further promote the cyclic CO capture capacity of calcium aluminate-supported CaO-based pellets. The pellets added with 25 wt.% calcium aluminate-based supports and 5 wt.% straw still held a good carbonation conversion of 46.45% after 50 cycles even tested under CO-rich calcination atmospheres. In addition, the anti-attrition ability tests by friability tester (FT) demonstrated that all the prepared pellets owned an excellent degree of attrition (less than 1%). The good CO capture performance and mechanical strength endowed biomass-templated calcium aluminate-supported CaO-based pellets with promising prospects for practical CO removal.

DOI 10.1007/s11356-019-05528-w
ISSN 1614-7499
Citation Li H, Hu Y, Chen H, Qu M. Porous spherical calcium aluminate-supported CaO-based pellets manufactured via biomass-templated extrusion-spheronization technique for cyclic CO capture. Environ Sci Pollut Res Int. 2019.

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