A molding method of Na2CO3/Al2O3 sorbents with high sphericity and low roughness for enhanced attrition resistance in CO2 sorption/desorption process via extrusion-spheronization method
2020
Liu, Wei | Wu, Ye | Cai, Tianyi | Xu, Zhikang | Liu, Daoyin | Ma, Jiliang | Chen, Xiaoping | Liu, Dong
Using sodium-based sorbents for capturing CO₂ is considered an effective and promising method for industry application. However, the attrition problem and how to improve the attrition resistance of sorbents are still unclear thus inhibiting the development of this technology. This paper was desired to address this problem. Multi-factors, including particle size, roughness, sphericity, fluidization number, temperature alternation and chemical reaction were supposed to result in the attrition of sorbents. Our results indicated that temperature alternation is a key factor affecting the attrition performance of sorbents. Moreover, microcrystalline cellulose was found to be an effective additive to produce the spherical sodium-based sorbents via extrusion-spheronization method. In summary, this work can benefit both the understanding and reduction of attrition of sodium-based sorbents and accelerate this technology into real industry.
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