A stochastic model based on Markov chain is proposed to describe the gas residence time distribution and contact time distribution in multistage fluidised beds. The Kolmogorov-Feller equations are solved by Laplace transform and subsequent numerical inversion. The effects of flow fluctuations on the distributions are discussed and the theoretical model is compared with the experimental data in literature. © 1974.

Y. B.G. Varma

FLOW OF FLUIDS - Packed Beds

Chemical operations

ANALYSIS-MATHEMATICAL

COMPARISON OF THEORY WITH PUBLISHED EXPERIMENTAL DATA

CONTACT TIME DISTRIBUTION

EFFECTS OF FLOW FLUCTUATIONS ON DISTRIBUTIONS

FLUIDIZED BEDS (GAS-SOLID

GAS RESIDENCE TIME DISTRIBUTION

LAPLACE TRANSFORM METHOD

MODEL BASED ON MARKOV CHAIN

MULTISTAGE FLUIDIZED BEDS

NUMERICAL INVERSION

STOCHASTIC METHODS

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

A stochastic model for residence time and contact time distributions of the gas in multistage fluidised beds

Chemical Engineering Science

Staging of a fluidisation column with horizontal screens reduces the axial mixing of the phases and limits the formation and growth of the bubbles. The pressure drop of the fluid and the flow patterns of the phases differ markedly with the mode of operation of the multistage fluidised bed. These aspects with respect to the theoretical models, the experimental data and the range of applicability are discussed along with the correlations to predict the characteristics of the bed. © 1975.

Powder Technology

Pressure drop of the fluid and the flow patterns of the phases in multistage fluidisation

Journal	Chemical Engineering Science
ISSN	00092509
Open Access	No