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Volume 112
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Experimental study on the pressure characteristics and model in a trickle bed: Effects of particle wettability and shape
Wenqian Tang a, Jiantao Li a *, Quanzhuo Gao a, Wenjie Zhang a, Zhenghong Luo a, Chunxi Lu b
a State Key Laboratory of High-Efficiency Coal Utilization and Green Chemical Engineering, Ningxia University, Yinchuan, 750021, China
b State Key Laboratory of Heavy Oil, College of Chemical Engineering and Environment, China University of Petroleum Beijing, Beijing, 102249, China
10.1016/j.partic.2026.02.021
Volume 112, May 2026, Pages 1-10
Received 7 January 2026, Revised 6 February 2026, Accepted 13 February 2026, Available online 6 March 2026, Version of Record 13 March 2026.
E-mail: jtli@nxu.edu.cn
Highlights

• Influence of particle wettability and shape on pressure drop was investigated.

• Effect of flow regime on pressure drop was considered.

• Drag force of the gas-liquid interphase was modified under Holub model.

• A correction parameter was proposed to modify the pressure drop model.


Abstract

Pressure drop is one of the key factors affecting the performance of trickle bed reactors. The particle characteristics and flow regime have a significant influence on the pressure drop. A pseudo-two-dimensional trickle bed reactor is constructed to investigate the effects of particle wettability and shape on pressure drop under different flow regimes. Experimental results indicate that particle wettability is beneficial for increasing liquid holdup, thereby increasing pressure drop. Moreover, cylindrical particles can increase the number of contact points between particles, which leads to an increased liquid holdup, and thus an increased pressure drop. A correction parameter including the effects of relative capillary force, particle shape, and flow regime is developed to modify the Holub pressure drop model. The modified model demonstrates a satisfactory prediction for the pressure drop in trickle bed reactors.

Graphical abstract
Keywords
Trickle bed reactor; Particle characteristics; Flow regime; Pressure drop model
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