文献类型：期刊文献

英文题名：A stochastic model for liquid dispersion in a trickle-bed reactor

作者：Liu, Peng[1]; Huang, Zi-Bin[1]; Zhu, Jun[1]; Yu, Kun[1]; Cheng, Zhen-Min[1]

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China

年份：2020

卷号：37

期号：12

起止页码：2056

外文期刊名：Chemical Engineering and Technology

收录：EI(收录号：20144800258754)

语种：英文

外文关键词：Electric impedance tomography - Dispersions - Chemical reactors - Diffusion - Liquids - Probability distributions - Stochastic systems - Matrix algebra

摘要：A stochastic model was developed to describe the liquid radial dispersion in a trickle-bed reactor, which has conventionally been modeled by the effective diffusion model. To establish the stochastic model, the column was divided into some layers of particles in the axial direction and several annulus rings in each layer in the radial direction. The liquid spreading was regarded as a fluid transport process and the matrix of transfer probability was derived based on the coordinates of the particle network in the cross-section of the column. With this transfer probability matrix and the initial liquid distribution, the liquid distribution in the downstream was predicted. In order to evaluate the model parameters, experimental data of the liquid dispersion were obtained from electrical capacitance tomography images and tracer injection. Good agreement was obtained between the stochastic model and the experimental liquid distribution data. Liquid dispersion is a critical parameter in designing trickle-bed reactors. A stochastic model is developed to describe the liquid radial dispersion, which has conventionally been modeled by the effective diffusion model. Compared with the effective diffusion model, the stochastic model shows better agreement with the experimental data. ? 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.