Effect of steam on heat storage and attrition performance of limestone under fluidization during CaO/CaCO3 heat storage cycles

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发布日期 2022-07-11

DOI 10.1039/D2RE00164K

影响因子 4.239

作者

Yi Fang, Yingjie Li, Yehui Dou, Zirui He, Jianli Zhao

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摘要

In a CaO/CaCO3 heat storage system, steam as a calcination medium can be easily separated from CO2. In this work, the exothermic process of the calcined limestone was simulated with a CFD–DEM model, and the effect of steam on heat storage and attrition performance of the limestone was tested in a bubbling fluidized bed reactor. The results show that under the same carbonation atmosphere, the limestone calcined under steam exhibits better heat storage performance but worse attrition resistance than that calcined under CO2. After 10 cycles, the effective conversion and attrition rate of the limestone calcined under steam and carbonated under CO2 are 0.3 and 1.39 μm per cycle, respectively. The attrition rate drops to 1.2 μm per cycle when 20% CO2 is introduced into the steam calcination atmosphere after 10 cycles. Furthermore, the introduction of the low-concentration steam in the carbonation atmosphere increases the effective conversion of the limestone, but it decreases the exothermic temperature. A mixture of high-concentration steam and CO2 is suitable as a calcination atmosphere, which provides a simple way for gas separation for a CaO/CaCO3 heat storage system.

期刊推荐

Electroanalysis

Acta Metallurgica Sinica-English Letters

Topics in Catalysis

NDT & E International

Bioorganic & Medicinal Chemistry Letters

Heteroatom Chemistry

Colloid Journal

Main Group Chemistry

Bioorganic & Medicinal Chemistry

Journal of Chemical Sciences

来源期刊

Reaction Chemistry & Engineering

CiteScore: 0

自引率: 8.8%

年发文量: 284

Reaction Chemistry & Engineering is an interdisciplinary journal reporting cutting-edge research focused on enhancing the understanding and efficiency of reactions. Reaction engineering leverages the interface where fundamental molecular chemistry meets chemical engineering and technology. Challenges in chemistry can be overcome by the application of new technologies, while engineers may find improved solutions for process development from the latest developments in reaction chemistry. Reaction Chemistry & Engineering is a unique forum for researchers whose interests span the broad areas of chemical engineering and chemical sciences to come together in solving problems of importance to wider society. All papers should be written to be approachable by readers across the engineering and chemical sciences. Papers that consider multiple scales, from the laboratory up to and including plant scale, are particularly encouraged.

Effect of steam on heat storage and attrition performance of limestone under fluidization during CaO/CaCO3 heat storage cycles

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