Reaction characteristics investigation of CeO<sub>2</sub>-enhanced CaSO<sub>4</sub> oxygen carrier with lignite

Baowen Wang; Zhongyuan Cai; Heyu Li; Yanchen Liang; Tao Jiang; Ning Ding; Haibo Zhao

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Reaction characteristics investigation of CeO₂-enhanced CaSO₄ oxygen carrier with lignite

Regular | Updated：2026-01-06

- Reaction characteristics investigation of CeO₂-enhanced CaSO₄ oxygen carrier with lignite
- Chinese Journal of Chemical Engineering Vol. 42, Issue 2, Pages: 319-328(2022)
- Affiliations：
  
  1. Research Institute for Coal Clean and Efficient Utilization, College of Electric Power, North China University of Water Resources and Electric Power,Zhengzhou,China,450045
  2. Yan Energy Science and Technology Research Institute, Shijiazhuang,Hebei,Ji,China,050000
  3. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology,Wuhan,China,430074
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2022
- Accepted：
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-enhanced CaSO
DOI：

-enhanced CaSO DOI：

摘要

Abstract

Calcium sulfate (CaSO

) has been verified as a promising oxygen carrier (OC) in the chemical looping combustion (CLC) for its high oxygen capacity

abundant reserve and low cost

but its low reactivity and deleterious sulfur species emission from the side reactions of CaSO

should be well considered for its wide application in CLC. In order to promote the reactivity of CaSO

and increase its potential to inhibit the gaseous sulfur emission

a CeO

-enhanced CaSO

OC mixed OC of core-shell structure was prepared using the combined template synthesis method. Reaction characteristics of the prepared CaSO

-CeO

mixed OC with a typical lignite was first conducted and systematically investigated

and an improved reactivity of the prepared CaSO

-CeO

mixed OC was demonstrated than its single component CaSO

or CeO

due to the fast transfer and exchange of oxygen from the CaSO

substrate to coal

via

the doped CeO

. Furthermore

the solid products formed from the mixed CaSO

-CeO

OC with the selected coal were collected and analyzed. Especially

evolution and redistributi

on of the sulfur species of different forms were focused. At the latter reaction stage of YN reaction with the CaSO

-CeO

mixed OC

the SO

emitted from the side reactions of CaSO

was greatly diminished and the doped CeO

was proven effective to directionally fix the SO

released to turn into different solid sulfur compounds

which were determined as Ce

and Ce

(SO

)

·5H

O and formed through the different pathways. In addition

good regeneration of the reduced CaSO

-CeO

mixed OC could be reached in spite of the unavoidable interaction between the included minerals in coal and the reduced mixed OC. Overall

the combined template method-made CaSO

-CeO

mixed OC reported herein was not only endowed with enhanced reactivity for coal conversion

but also owned the potential to directionally fix the gaseous sulfur emission

which is quite applicable as OC for simultaneous decarbonatization and desulfurization in the real CLC process.

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Related Institution

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⁰

Reaction characteristics investigation of CeO2-enhanced CaSO4 oxygen carrier with lignite

DOI：

摘要

Abstract

关键词

Keywords

references

Reaction characteristics investigation of CeO₂-enhanced CaSO₄ oxygen carrier with lignite