The performance of packed bed adiabatic gas absorbers has been analyzed using the enthalpy and material balance equations incorporating a new parameter, fr, defined as the fraction of the heat of absorption that is accounted for in the gas stream. An experimental programme to evaluate fr was carried out and the data correlated. It was found that fr was dependent on the thermo‐physical properties and the hydrodynamic conditions. It is postulated that the mechanism by which this heat transfer occurs is by turbulence at the interface and by entrainment. Copyright © 1995 VCH Verlagsgesellschaft mbH

M. Sadasivam

Arcot R. Balakrishnan

enthalpy

Finite difference method

Heat transfer

Hydrodynamics

Interfaces (materials)

Mathematical models

Packed beds

Physical properties

Thermal effects

Turbulence

Adiabatic conditions

ENTHALPY EQUATIONS

entrainment

MATERIAL BALANCE EQUATIONS

Gas absorption

ADIABATIC GAS

Adsorption

PACKED COLUMNS

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

Chemical Engineering & Technology

This paper describes an experimental study to determine £, a parameter defined in an earlier analytical study as the fraction of the heat of dilution in packed bed liquid desiccant dehumidifiers that goes into the air stream. ξ was determined at various operating conditions in a packed bed using calcium chloride solution as the liquid desiccant in countercurrent flow with air. ξ has been correlated in terms of L/G ratios, gas Reynolds number, the ambient number, and a new parameter, the desiccant number. An extension of the ε-NTU model incorporating ξ is presented, and comparison with data, both present and those reported in the literature, show good agreement. © 1994, American Chemical Society. All rights reserved.

Industrial and Engineering Chemistry Research

Experimental Investigations on the Thermal Effects in Packed Bed Liquid Desiccant Dehumidifiers

International Journal of Multiphase Flow

Droplet entrainment and deposition in horizontal annular flow

Industrial & Engineering Chemistry Process Design and Development

Design of packed, adiabatic absorbers: physical absorption of acid gases in methanol

Journal	Chemical Engineering & Technology
ISSN	09307516
Open Access	No