Process intensification in catalytic wet air oxidation of phenol via coupling gas-liquid microdispersion with trickle bed reactors

Jing Tan*, Miaomiao Nie, Zhikang Li, Yani Ji, Shijie Chen, Wensheng Deng, Lai Chen, Yun Lu, Yuefeng Su

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Intensified trickle bed reactors were developed for catalytic wet air oxidation (CWAO) of phenol, by generating microbubbles before gas/liquid fluid flows along catalyst packed-beds. By coupling gas-liquid microdispersion module, phenol disappearance rate significantly increases under the same operating conditions and phenol conversion reaches 92% in 22 seconds at 160°C and 1000 kPa. Effects of operating conditions were studied systematically and results demonstrated characteristics of high-interaction regime at low Reynolds number. Comparison of effects among mass transfer and reaction steps shows CWAO reaction is controlled by resistance to liquid-solid mass transfer of phenol in most cases, while gas-liquid mass-transfer-resistance is ignorable. A dimensionless correlation, Sh = 2.29φ−0.91(ReL + ReG)0.04, was established, by considering influences of liquid film thickness and fluid flow situations on liquid-solid mass transfer coefficient in microbubble-in-liquid/catalyst-particle system. The study would provide an effective method for intensifying CWAO and other liquid-solid-mass-transfer-resistance-controlled gas/liquid/solid catalytic reactions and help understand mass transfer mechanism in new gas/liquid/solid system.

Original languageEnglish
Article numbere10029
JournalJournal of Advanced Manufacturing and Processing
Volume1
Issue number4
DOIs
Publication statusPublished - 1 Oct 2019

Keywords

  • intensified process fundamentals
  • modeling and simulation
  • process intensification

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Tan, J., Nie, M., Li, Z., Ji, Y., Chen, S., Deng, W., Chen, L., Lu, Y., & Su, Y. (2019). Process intensification in catalytic wet air oxidation of phenol via coupling gas-liquid microdispersion with trickle bed reactors. Journal of Advanced Manufacturing and Processing, 1(4), Article e10029. https://doi.org/10.1002/amp2.10029