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Scale‐up production and process optimization of Zr‐doped CaO‐based sorbent for CO 2 capture
Author(s) -
Jiang Tao,
Zhang Hao,
Xu Zhihong,
Zhao Yujun,
Ma Xinbin,
Wang Shengping
Publication year - 2020
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.2502
Subject(s) - calcination , sorbent , carbonation , chemical engineering , materials science , calcium looping , adsorption , crystallite , desorption , volume (thermodynamics) , sol gel , volume fraction , chemistry , catalysis , nanotechnology , metallurgy , organic chemistry , composite material , physics , quantum mechanics , engineering
In this work, Zr‐doped CaO‐based sorbents were prepared at several kilograms per batch using a simple sol–gel technique. CO 2 adsorption performance and cycling stability of the synthesized sorbents were significantly improved in consequence of the incorporation of Zr component. Technological conditions of the scale‐up production were optimized, including precursor concentration of calcium, amount of citric acid, gelification temperature, and gelification time, which played important roles in the sol–gel preparation process. The factors affecting the carbonation/calcination process of sorbent (volume fraction of CO 2 and calcination temperature) were also investigated. A 4‐kg CaO‐based sorbents, with appropriate nanosize CaO crystallite, loose and porous structure, and uniform distribution of Ca and Zr, have been synthesized successfully at one batch, which exhibited a final CO 2 adsorption capacity of 5.86 mol‐CO 2 /kg‐ads under a lower volume fraction of CO 2 (15%) and a higher calcination temperature (900°C) after 45 adsorption/desorption cycles.