Journal
FUEL
Volume 301, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2021.121049
Keywords
CO2 capture; Kg-scale production; Extrusion-spheronization; Al-promoted; CaO-based
Categories
Funding
- National Key R&D Program of China [2017YFB0603300]
- Program for New Century Excellent Talents inUniversity [NCET-13-0411]
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The excessive emission of anthropogenic CO2 has led to the greenhouse effect, causing serious problems to the environment and human society. To address this issue, Al-promoted CaO-based solid sorbents were produced on a kilogram scale per batch using a simple co-precipitation technique, which improved the CO2 sorption performance of the sorbents. The optimized preparation conditions resulted in the successful synthesis of a 6-kg sorbent powder with favorable CO2 capture performance, and pelletization methods were used to further enhance the sorbent pellets' CO2 sorption capability and anti-attrition resistance.
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.
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