Chemical looping oxidative propane dehydrogenation controlled by oxygen bulk diffusion over FeVO<sub>4</sub> oxygen carrier pellets

Hongbo Song; Wei Wang; Jiachen Sun; Xianhui Wang; Xianhua Zhang; Sai Chen; Chunlei Pei; Zhi-Jian Zhao

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Chemical looping oxidative propane dehydrogenation controlled by oxygen bulk diffusion over FeVO₄ oxygen carrier pellets

Full Length Article | Updated：2026-01-06

- Chemical looping oxidative propane dehydrogenation controlled by oxygen bulk diffusion over FeVO₄ oxygen carrier pellets
- Chinese Journal of Chemical Engineering Vol. 53, Issue 1, Pages: 409-420(2023)
- Affiliations：
  
  1. Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University,Tianjin,China,300072
  2. Collaborative Innovation Center of Chemical Science and Engineering,Tianjin,China,300072
  3. Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City,Fuzhou,China,350207
  4. Department of Chemistry, National University of Singapore, 3 Science Drive 3,Singapore,117543
  5. Haihe Laboratory of Sustainable Chemical Transformations,Tianjin,China,300192
  6. Zhejiang Institute of Tianjin University,Ningbo,China,315201
- Author bio：
- Funds：
- DOI：
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- Published：2023
- Accepted：
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oxygen carrier pellets[J]. 中国化学工程学报, 2023, 53(1): 409-420.
DOI：

oxygen carrier pellets[J]. 中国化学工程学报, 2023, 53(1): 409-420. DOI：

摘要

Abstract

The oxygen distribution and evolution within the oxygen carrier exert significant influence on chemical looping processes. This paper describes the influence of oxygen bulk diffusion within FeVO

oxygen carrier pellets on the chemical looping oxidative propane dehydrogenation (CL-ODH). During CL-ODH

the oxygen concentration at the pellet surface initially decreased and then maintained stable before the final decrease. At the stage with the stable surface oxygen concentration

the reaction showed a stable C

formation rate and high C

selectivity. Therefore

based on Fick’s second law

the oxygen distribution and evolution in the oxygen carrier at this stage were further analyzed. It was found that main reactions of selective oxidation and over-oxidation were controlled by the oxygen bulk diffusion. C

conversion rate kept decreasing during this stage due to the decrease of the oxygen flux caused by the decline of oxygen gradient within the oxygen carrier

while C

selectivity increased due to the decrease of over-oxidation. In addition

reaction rates could increase with the propan

e partial pressure due to the increase of the oxygen gradient within the oxygen carrier until the bulk transfer reached its limit at higher propane partial pressure. This study provides fundamental insights for the diffusion-controlled chemical looping reactions.

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Chemical looping oxidative propane dehydrogenation controlled by oxygen bulk diffusion over FeVO4 oxygen carrier pellets

DOI：

摘要

Abstract

关键词

Keywords

references

Chemical looping oxidative propane dehydrogenation controlled by oxygen bulk diffusion over FeVO₄ oxygen carrier pellets