Fluidization of particles in SCW fluidized bed: Voidage distribution of emulsion phase--颗粒学报PARTICUOLOGY

Wang, H., & Lu, Y. (2022). Fluidization of particles in SCW fluidized bed: Voidage distribution of emulsion phase. Particuology, 63, 60-75. https://doi.org/10.1016/j.partic.2021.04.019

Fluidization of particles in SCW fluidized bed: Voidage distribution of emulsion phase

Hao Wang, Youjun Lu ^*

State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China

10.1016/j.partic.2021.04.019

Volume 63, April 2022, Pages 60-75

Received 12 February 2021, Revised 26 March 2021, Accepted 8 April 2021, Available online 29 May 2021, Version of Record 18 November 2021.

E-mail: yjlu@mail.xjtu.edu.cn

Highlights

• Capacitance probe measurement system is used to obtain voidage of emulsion phase.

• Effect of operation conditions on voidage and probability density is discussed.

• Correlation between superficial velocity and voidage in emulsion phase is proposed.

Abstract

Supercritical water (SCW) fluidized bed reactors convert biomass to fuels without pollutants emission. In this work, experimental studies were carried out to investigate voidage distribution in an SCW fluidized bed by capacitance probes. Quartz sands with different particle sizes were fluidized by SCW under system pressure of 20–27 MPa and temperature of 410–570 °C. The effect of operation conditions on voidage distributions of the emulsion phase (e.g. averaged voidage and probability density) is discussed. A predicting correlation between voidage and superficial velocity in emulsion phase is proposed. The relative error of the correlation is within ±25%. These research results provide useful guidance for the optimization of supercritical water gasification technology.

Graphical abstract

Keywords

Supercritical water fluidized bed; Capacitance probe measurement system; Voidage distribution

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