Chemical Engineering (CE): Recent submissions
Now showing items 41-60 of 214
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Transition in flexible tubes and channels
A combination of experiments, flow simulations and linear stability analysis is used to develop a fundamental understanding of the instability and transition in flows through flexible tubes and channels. The present study ... -
Dehydration of alcohols
Catalytic vapor phase dehydration of i-propanol, n-butanol, i-butanol, s-butanol and t-butanol is studied in a fixed bed flow reactor under isothermal conditions over various catalysts to understand the influence of catalyst ... -
Estimation of thermophysical properties of organic liquids: diffusion coefficients and excess volumes.
The objective of this work is to experimentally determine the thermophysical properties such as diffusion coefficients and excess volumes of mixing of some organic liquids, specifically of binary systems involving the ... -
Oxidation of Alcohols
Oxidation of ethanol and methanol are known to be feasible reactions. Equilibrium constants calculated show that these reactions are highly irreversible. Theoretically ethanol and methanol oxidations to their respective ... -
Modeling of Coalescence Cascades in Liquid-Liquid dispersions
Agitated dispersions of one liquid in another immiscible liquid invert at a critical value of dispersed phase fraction, nearly catastrophically. The dispersed phase becomes continuous and vice versa. This phenomenon has ... -
Studies in gas-solid reactions
Non-catalytic gas-solid reactions are of great industrial importance and have therefore attracted considerable research effort. As a result, a number of models have been proposed in literature. Among the early models, the ... -
Polysterene-based compatibilizers for polymer blending : main chain epoxidation of high molecular weight polystyrene
Polystyrene has often been functionalized for its use in various commercial applications, but most often the reactive functional groups have been substituted on its benzene ring. In the present work, epoxy functional groups ... -
Structure and rheology of lyotropic liquid crystalline suspensions
Suspensions in the form of solid–liquid dispersions are encountered in several industrial applications. Household detergents and processed foods can be modeled as a suspension of phase-separated or externally added particulate ... -
Heterogeneous catalytic oxidation of isobutylene in vapour-phase Ph.D. Thesis
Kinetics of the catalytic vapour-phase oxidation of isobutylene to methacrolein, an important raw material for polymer industries, was investigated in a fixed-bed isothermal flow reactor. Out of a number of catalysts ... -
Studies in the oxidation of benzene
Oxidation as an important unit process having considerable promise has been highlighted. A new process of phenol manufacture based on the direct oxidation of benzene as opposed to the multi-stage processes (like Scientific ... -
Vapour phase catalytic hydrogenation of aniline
A very large effort has been directed towards heterogeneous catalysis and establishing the proper form for equations that express the rate of surface reactions as a function of system variables. These equations range ... -
Dehydrogenation of cyclohenxanol to cyclohexanone
The dehydrogenation of cyclohexanol to cyclohexanone has been studied in detail. The thermodynamic equilibrium constants at various temperatures have been collected from literature and the equilibrium conversions have been ... -
Studies on the catalytic hydrogenation of salicyloyl chloride
In the present work, catalytic hydrogenation of salicyloyl chloride to salicylaldehyde by Rosenmund reduction using Pd-C catalysts was extensively studied. A stirred slurry reactor was used for studying this reaction. The ... -
Modeling of phase inversion phenomenon
Turbulent liquid–liquid dispersions are frequently encountered in the chemical industry in various operations such as liquid–liquid extraction, liquid–liquid reactions, polymerization, and direct contact heat transfer. ... -
Studies in hydrodynamic and electrohydrodynamic instabilities of fluid-solid and fluid- fluid interfaces
The study of hydrodynamic and electrohydrodynamic stability is an important branch of fluid mechanics and has applications in various areas of chemical engineering and biophysics. The detailed study of hydrodynamic stability ... -
Polymerization in supercritical fluids
The chemical industry has become increasingly aware of environmental concerns over the use of volatile and hazardous organic solvents to synthesize commercial polymers. Attractive properties of supercritical fluids make ... -
Oxidation of alkyl aromatics Part II : oxidation of toluene to benzoic acid in presence of promoters
The investigation on the catalytic vapour-phase oxidation of toluene in the presence of gaseous promoters was taken up to determine the operating conditions favourable for the maximum conversion to benzoic acid. The effects ... -
Linear stability analysis of fluid flow adjacent to a flexible surface
Fluid flow adjacent to a flexible surface is often encountered in biological systems and bio-technological processes. These flows have been analyzed using models similar to those for the flow past a rigid surface, but the ...