Modification of CaO-based sorbents prepared from calcium acetate for CO<sub>2</sub> capture at high temperature

Xiaotong Liu; Junfei Shi; Liu He; Xiaoxun Ma; Shisen Xu

doi:10.1016/j.cjche.2016.10.015

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Modification of CaO-based sorbents prepared from calcium acetate for CO₂ capture at high temperature

Separation Science and Engineering | Updated：2026-01-06

- Modification of CaO-based sorbents prepared from calcium acetate for CO₂ capture at high temperature
- Chinese Journal of Chemical Engineering Vol. 25, Issue 5, Pages: 572-580(2017)
- Affiliations：
  
  1. School of Chemical Engineering, Northwest University,Xi'an,China,710069
  2. Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy,Xi'an,China,710069
  3. Shaanxi Research Center of Engineering Technology for Clean Coal Conversion,Xi'an,China,710069
  4. China Huaneng Group Clean Energy Technology Research Institute,Beijing,China,100098
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2016.10.015
  CLC：
- Published：2017
- Accepted：
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capture at high temperature[J]. , 2017, 25(5): 572-580.
DOI：

capture at high temperature[J]. , 2017, 25(5): 572-580. DOI： 10.1016/j.cjche.2016.10.015.

摘要

Abstract

CaO-based sorbent is considered to be a promising candidate for capturing CO

at high temperature. However

the adsorption capacity of CaO decreases sharply with the increase of the carbonation/calcination cycles. In this study

CaO was derived from calcium acetate (CaAc

)

which was doped with different elements (Mg

Zr and La) to improve the cyclic stability. The carbonation conversion and cyclic stability of sorbents were tested by thermogravimetric analyzer (TGA). The sorbents were characterized by N

isothermal adsorption measurements

scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results showed that the cyclic stabilities of all modified sorbents were improved by doping elements

while the carbonation conversions of sorbents in the 1st cycle were not increased by doping different elements. After 22 cycles

the cyclic stabilities of CaO-Al

CaO-Ce and CaO-La were above 96.2%. After 110 cycles

the cyclic stability of CaO-Al was still as high as 87.1%. Furthermore

the carbonation conversion was closely related to the critical time and specific surface area.

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Modification of CaO-based sorbents prepared from calcium acetate for CO2 capture at high temperature

DOI：10.1016/j.cjche.2016.10.015

摘要

Abstract

关键词

Keywords

references

Modification of CaO-based sorbents prepared from calcium acetate for CO₂ capture at high temperature