PROCESS STUDY OF CeO2 PREPARATION BY JET-FLOW PYROLYSIS VIA MICROWAVE HEATING

Original scientific paper

Authors

  • Lv Chao School of Control Engineering, Northeastern University, Hebei 066004, China
  • Yin Hongxin School of Control Engineering, Northeastern University, Hebei 066004, China https://orcid.org/0000-0002-2537-4207
  • Liu Yanlong School of Control Engineering, Northeastern University, Hebei 066004, China
  • Chen Xuxin School of Control Engineering, Northeastern University, Hebei 066004, China
  • Sun Minghe School of Control Engineering, Northeastern University, Hebei 066004, China
  • Zhao Hongliang School of Metallurgy and Ecological Engineering, University of science and technology Beijing, Beijing 100083, China https://orcid.org/0000-0002-9789-6178

DOI:

https://doi.org/10.2298/CICEQ220510034C

Keywords:

cerium oxide, economic benefit, microwave heating, numerical simulation

Abstract

The spray pyrolysis method has the disadvantage of nozzle plugging, and the conventional heating model causes a large temperature gradient, which leads to unevenly heated reactants. This study used cerium chloride heptahydrate and Venturi reactor as raw material and core equipment. The technology of microwave heating was combined to prepare single-phase sphere-like cerium oxide. The mean size of the particles was near 80nm. The product was characterized via XRD, SEM, and EDS technologies. The purity, morphology, and energy consumption were compared with the conventional spray pyrolysis. Fluent software coupled with HFSS was employed to simulate the effects of different process conditions on products’ purity and temperature field in the reactor. There was good correspondence between experimental and simulated results. The results showed that as gas velocity Vg increased, the tendency of the temperature field distribution did not change. The lowest mass fraction of chlorine element reached 0.13% when the gas inlet velocity reached 1.7 m/s. When the material inlet velocity was 0.05 m/s, the mass fraction of the chlorine element was below 0.1%, which indicated that the reactants had a complete reaction. It has been calculated that the heating cost, energy consumption, and CO2 emission decreased sharply compared with the spray pyrolysis method.

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Published

30.12.2022 — Updated on 04.06.2023

Issue

Vol. 29 No. 4 (2023)

Section

Articles

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Copyright (c) 2021 Lv Chao, Yin Hongxin, Liu Yanlong, Chen Xuxin, Sun Minghe, Zhao Hongliang

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How to Cite

PROCESS STUDY OF CeO2 PREPARATION BY JET-FLOW PYROLYSIS VIA MICROWAVE HEATING: Original scientific paper. (2023). Chemical Industry & Chemical Engineering Quarterly, 29(4), 273-280. https://doi.org/10.2298/CICEQ220510034C

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