Chemical Engineering
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Dynamic behaviour of a semibatch non-isothermal gas-liquid reactor
(1991)A dynamic model to predict transient temperature profiles of a nonisothermal semibatch gas-liquid reactor was developed. The enhancement factor for non-isothermal gas absorption was calculated by extending the model of ... -
Design of packed towers for absorption and desorption of carbon dioxide using hot promoted K2CO3 solution
(1991)The mathematical model developed for the design of a packed column for the absorption of carbon dioxide in hot promoted potassium carbonate solution (Gas Sep Purif (1989) Vol 3 p 152; (1990) Vol 4 p 58) is extended to take ... -
Predictions of concentration in the pyrolysis of biomass materials—I
(1994)The present work involves the prediction of the concentration profiles in the case of pyrolysis of different lignocellulosic materials in isothermal and non-isothermal conditions. The operative temperature range is from ... -
Effect of coal properties on the specific coal consumption in a typical thermal power station in India
(1994)The effect of various coal properties like ash content, moisture content, fixed carbon and calorific value on specific coal consumption in a typical thermal power station in India is analysed. It is observed that the ... -
Design and parameter estimation of reverse osmosis systems
(1992)A coupled set of nonlinear algebraic and ordinary differential equations is solved numerically for design of reverse osmosis systems where the membrane transport is governed by three-parameter models. The predictions of ... -
Treatment of chromium and nickel in wastewater by using aquatic plants
(1994)The aquatic plants Salvinia and Spirodela were used for the removal of chromium and nickel in their synthetic solutions of 1.0–8.0 ppm in the months of August–November 1990 and April–July 1991. The rate of percentage removal ... -
Energy and chemicals from rice husk
(1995)Rice husk is the only agro residue having maximum siliceous ash content and available in dry form. The present work on rice husk describes processes for producing controlled carbon-silica mixtures in amorphous form, ... -
Kinetics of adsorption on biporous solids—for a system with rectangular equilibrium—reanalysed
(1994)Mass transfer equations describing the rate of adsorption for rectangular equilibrium on biporous solids were solved numerically by finite difference technique. Values of parameters affecting the rate of adsorption were ... -
Numerical simulation of dispersion in the flow of power law fluids in curved tubes
(1994)Taylor's model is used as a framework to study axial dispersion in non-Newtonian power law fluids in a circular curved tube for low Dean number. A spectral model that calculates the solutions effectively for large values ... -
Measurement of gas—liquid parameters in a mechanically agitated contactor
(1993)The volumetric mass transfer coefficient kLa for a mechanically agitated gas—liquid contactor was measured by employing the dynamic method developed recently by Panja and Phaneswara Rao (Trans. Inst. Chem. Eng., 69 (1991) ... -
Mass transfer limitations in a membrane module
(1993)Application of reverse osmosis in the manufacture of sugar from cane juice and beet juice is emerging as a major potential field for energy conservation. The effect of flow velocity and pressure of operation is closely ... -
Feasibility study of a simple unitized regenerative fuel cell
(2004)Conventional fuel cells use hydrogen and oxygen as the fuel and oxidant, respectively. Hydrogen and oxygen can be produced through electrolysis of water in an electrochemical cell. A simple unitized regenerative fuel cell ... -
Equilibrium, kinetics and breakthrough studies for adsorption of fluoride on activated alumina
(2005)Contamination of drinking water due to fluoride is a severe health hazard problem. Excess of fluoride (>1.5 mg/l) in drinking water is harmful to the human health. Various treatment technologies for removing fluoride from ... -
H2 production by steam reforming of methanol over Cu/ZnO/Al2O3 catalysts: transient deactivation kinetics modeling
(2005)Steam reforming of methanol over a Cu/ZnO/Al2O3 catalyst has been investigated over the temperature range of 493–573 K at atmospheric pressure in a fixed bed reactor. A series of catalysts were prepared by wet impregnation ... -
Effect of a new high porosity packing on hydrodynamics and mass transfer in bubble columns
(2004)The experimental study is aimed at investigating the effect of a high porosity stainless steel packing (solid fraction being equal to 0.5%) and the influence of alcohol (0.5% volume) addition on the hydrodynamics and the ... -
Catalytic wet oxidation of phenol in a trickle bed reactor
(2004)Catalytic liquid phase oxidation of aqueous phenol was studied in a pilot plant trickle bed reactor using a copper oxide catalyst supported on alumina. Catalysts were prepared by impregnating CuO on alumina extrudates and ... -
Catalytic conversion of methanol to gasoline range hydrocarbons
(2004)The catalytic conversion of methanol to hydrocarbons of gasoline range has been studied over HZSM-5, ZnO/HZSM-5, CuO/HZSM-5 and CuO/ZnO/HZSM-5. The selectivity of methanol conversion to hydrocarbon has been found to be a ... -
Modeling of a radial flow hollow fiber module and estimation of model parameters using numerical techniques
(2004)A numerical solution is developed for modeling as well as predicting the performance of a radial flow hollow fiber reverse osmosis (HFRO) module. The three-parameter Spiegler–Kedem (S–K) model is used for describing the ... -
Uptake of sodium chloride by mixture of weakly acidic and weakly basic ion exchange resins: equilibrium and kinetic studies
(2004)The equilibrium and kinetic behaviour of weakly acidic resin (WAR) with alkali and weakly basic resin (WBR) with acids have been studied by many research teams. But little work is reported in literature regarding equilibrium ... -
Analysis of modified surface force pore flow model with concentration polarization and comparison with Spiegler–Kedem model in reverse osmosis systems
(2004)The Modified Surface Force Pore Flow (MD-SF-PF) model is used for predicting the performance of the sodium chloride–water and sodium sulphate–water reverse osmosis systems. Unlike the previous analysis available in literature ... -
Investigations on the column performance of fluoride adsorption by activated alumina in a fixed-bed
(2004)In the present study, removal of fluoride ions using activated alumina (AA) was investigated in batch and continuous operations. The fluoride removal performance was investigated as a function of the fluoride concentration, ... -
Equilibrium, kinetics and thermodynamic studies for adsorption of As(III) on activated alumina
(2004)Contamination of drinking water due to arsenic is a severe health hazard problem. Most of the techniques developed for pentavalent arsenic [As(V)] species are not very effective for trivalent arsenic ions [As(III)] which ... -
Effect of calcium ion and montmorillonite clay on bitumen displacement by water on a glass surface
(2004)Experiments were conducted to study the effect of calcium ion and montmorillonite clay on bitumen displacement by an aqueous phase on a glass surface. Upon exposure to an aqueous environment containing calcium ion and ... -
Enhanced liquid spreading due to porosity
(2004)A conceptual pore level model (Chem. Eng. Sci. 57 (2002) 3401) of spreading of liquid over internally wet porous particles is applied to explain reported rector level enhancement in wetting of trickle bed reactor (Ind. ... -
A financial evaluation of biomass-gasifier-based power generation in India
(1997)A preliminary financial evaluation of biomass-gasifier-based power generation in India was undertaken. Simple cost functions were developed and used for this purpose. The unit cost of electricity has been estimated for a ... -
Pollution-preventing anionic lithographic inks
(2003)Lithographic printing presses use aliphatic and aromatic solvents for cleaning various surfaces, which are coated with the ink. The conventional printing inks also contain volatile solvents. During printing and cleaning ... -
Effect of feed atomization on FCC performance: simulation of entire unit
(2003)Entire fluid catalytic cracking (FCC) unit, comprising of a riser and a regenerator, is simulated by integrating FCC riser model presented in our earlier work (Chem. Eng. Sci. 56 (2001) 4489) with an FCC regenerator model. ... -
Kinetics of biosorption of cadmium on Baker’s yeast
(2003)In the present study the kinetics of biosorption of cadmium(II) ions by deactivated protonated yeast converted to sodium form was investigated for different initial concentrations of the metal ion (10–100 ppm) and different ... -
Gas absorption with zero-order chemical reaction in a foam-bed reactor
(2003)A mathematical model for oxidation of aqueous alkaline solution of sodium dithionite using air as an oxidizing medium in a foam-bed reactor has been developed under pseudo-zero-order conditions of reaction and was found ... -
Biosorption of nickel(II) ions on Baker's yeast
(2003)The biosorption of nickel(II) ions by deactivated protonated yeast was investigated with respect to the initial pH and initial metal ion concentration. The kinetics of sorption was also followed based on the amounts of ...
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