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Optimal design of novel honeycomb photocatalytic reactors for numerical analysis of formaldehyde degradation by CFD modeling

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Abstract

As an alternative to the investigation of photocatalysts, it is a potential approach to enhance the photocatalytic performance of the novel photocatalytic reactor by optimizing its geometric structure and reaction conditions. In this work, five different honeycomb photocatalytic reactors with a deflector and a porous airflow distribution plate were designed and a numerical simulation was performed based on computational fluid dynamics (CFD). The simulation results showed that a huge vortex appeared near the entrance of the original model and the velocity distribution inside the reactor was non-uniform, whereas these shortcomings could be effectively overcome when using the 45° deflector model (S-4) compared to the other models. Compared to S-1, the photocatalytic conversion rate of formaldehyde for S-4 was boosted by 7.29% at a flow velocity of 0.04 m s−1. In addition, it was found that the photocatalytic conversion rate of formaldehyde increased from 55.45 to 94.73% when the velocity decreased from 0.04 to 0.01 m s−1, and the photocatalytic removal rate of formaldehyde decreased from 94.73 to 70.05% as the relative humidity varied from 20 to 70%. Furthermore, when the irradiance increased from 45 to 265 mW cm−2, the photocatalytic conversion rate of formaldehyde improved by 10.78%. Overall, this work contributes to the design of the novel honeycomb reactor to acquire the optimized construction of the photocatalytic reactor.

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The data used to support the findings of this study are available from the corresponding author upon request.

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Funding

This work has been funded by the National Natural Science Foundation of China (Grant No. 21403184), the Qinglan Project of Jiangsu Province, the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (Grant No. 22KJA430008), and the Scientific Research and Practical Innovation Project for Graduate Students in Jiangsu Province (No. SJCX21_XY015).

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Authors and Affiliations

  1. School of Mechanical Engineering, Yancheng Institute of Technology, Yancheng, 224051, People’s Republic of China

    Jinsen Gao, Junjian Tan, Lihua Zhang & Cunxia Wang

  2. Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng, 224051, People’s Republic of China

    Jinsen Gao, Pengyu Dong, Junjian Tan, Lihua Zhang & Cunxia Wang

Authors
  1. Jinsen Gao
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  2. Pengyu Dong
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  3. Junjian Tan
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  4. Lihua Zhang
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  5. Cunxia Wang
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Contributions

JG contributed to the investigation, visualization, data curation, and writing—original draft. PD contributed to supervision, conceptualization, funding acquisition, project administration, writing—review and editing. JT contributed to validation. LZ contributed to data curation. CW contributed to the methodology.

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Correspondence to Pengyu Dong.

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Gao, J., Dong, P., Tan, J. et al. Optimal design of novel honeycomb photocatalytic reactors for numerical analysis of formaldehyde degradation by CFD modeling. Res Chem Intermed 49, 1683–1700 (2023). https://doi.org/10.1007/s11164-023-04961-4

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