LAPSE:2019.0550
Published Article
LAPSE:2019.0550
Investigation of Pore-Formers to Modify Extrusion-Spheronized CaO-Based Pellets for CO₂ Capture
Zonghao Zhang, Shuai Pi, Donglin He, Changlei Qin, Jingyu Ran
May 16, 2019
The application of circulating fluidized bed technology in calcium looping (CaL) requires that CaO-based sorbents should be manufactured in the form of spherical pellets. However, the pelletization of powdered sorbents is always hampered by the problem that the mechanical strength of sorbents is improved at the cost of loss in CO₂ sorption performance. To promote both the CO₂ sorption and anti-attrition performance, in this work, four kinds of pore-forming materials were screened and utilized to prepare sorbent pellets via the extrusion-spheronization process. In addition, impacts of the additional content of pore-forming material and their particle sizes were also investigated comprehensively. It was found that the addition of 5 wt.% polyethylene possesses the highest CO₂ capture capacity (0.155 g-CO₂/g-sorbent in the 25th cycle) and mechanical performance of 4.0 N after high-temperature calcination, which were about 14% higher and 25% improved, compared to pure calcium hydrate pellets. The smaller particle size of pore-forming material was observed to lead to a better performance in CO₂ sorption, while for mechanical performance, there was an optimal size for the pore-former used.
Keywords
anti-attrition, calcium looping, Carbon Dioxide Capture, chemical sorption, pore-former particle size
Subject
Suggested Citation
Zhang Z, Pi S, He D, Qin C, Ran J. Investigation of Pore-Formers to Modify Extrusion-Spheronized CaO-Based Pellets for CO₂ Capture. (2019). LAPSE:2019.0550
Author Affiliations
Zhang Z: Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
Pi S: Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
He D: Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
Qin C: Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
Ran J: Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
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Journal Name
Processes
Volume
7
Issue
2
Article Number
E62
Year
2019
Publication Date
2019-01-24
Published Version
ISSN
2227-9717
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Original Submission
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PII: pr7020062, Publication Type: Journal Article
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LAPSE:2019.0550
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doi:10.3390/pr7020062
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May 16, 2019
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CC BY 4.0
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May 16, 2019
 
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May 16, 2019
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Calvin Tsay
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