Kilogram-scale production and pelletization of Al-promoted CaO-based sorbent for CO2 capture

[Display omitted] •A 6-kg Al-promoted CaO-based sorbent powder had been synthesized at one batch.•Synthetic conditions of the sorbent powder during scale-up production were optimized.•Pelletization of kg-scale produced sorbent was executed via extrusion-spheronized methods.•A typical binder material...

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Bibliographic Details
Published in:Fuel (Guildford) 2021-10, Vol.301, p.121049, Article 121049
Main Authors: Jiang, Tao, Zhang, Hao, Zhao, Yujun, Qin, Changlei, Wang, Shengping, Ma, Xinbin
Format: Article
Language:English
Subjects:
Al-promoted
Anthropogenic factors
Boehmite
Calcium
Calcium oxide
CaO-based
Carbon dioxide
Carbon sequestration
CO2 capture
Comminution
Coprecipitation
Extrusion
Extrusion-spheronization
Granulation
Greenhouse effect
Kg-scale production
Modernization
Nitric acid
Pellets
Powder
Reliability engineering
Sorbents
Sorption
Structural reliability
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Summary:[Display omitted] •A 6-kg Al-promoted CaO-based sorbent powder had been synthesized at one batch.•Synthetic conditions of the sorbent powder during scale-up production were optimized.•Pelletization of kg-scale produced sorbent was executed via extrusion-spheronized methods.•A typical binder material with peptizing agent was incorporated to facilitate sorbent pellets.•Sorbent pellets showed the CO2 uptake of 5.4 mol/kg and anti-attrition resistance of 0.14 wt%/h. Excessive emission of anthropogenic CO2 has facilitated greenhouse effect since the industrialized and modernized society, causing serious problems to both environment and human society. To alleviate this, Al-promoted CaO-based solid sorbents were produced on kilogram scale per batch via a simple and facile co-precipitation technique, in which Al served as an inert support and achieved an improvement on CO2 sorption performance of the sorbents. Preparation conditions of the mass-produced sorbents were optimized, including Ca/Al molar ratio, precursor concentration of calcium, coprecipitating temperature and time, which acted as critical roles in co-precipitation process. A 6-kg sorbent powder with favorable CO2 capture performance has been synthesized successfully at one batch. In addition, pelletization of the kilogram-scale produced sorbent powder was also executed utilizing extrusion-spheronized granulation methods. And a typical binder material (pseudo-boehmite) with peptizing agent (nitric acid) was incorporated to ameliorate nano-porous structure and mechanical reliability of sorbent pellets. The sorbent pellets, fabricated using the kg-scale produced powder, displayed a final CO2 sorption capability of 5.4 mol-CO2/kg-ads and great anti-attrition resistance (0.14 wt%/h) after 30 adsorption/desorption cycles up to 40 h.
ISSN:0016-2361
1873-7153
DOI:10.1016/j.fuel.2021.121049