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Showing papers in "Chemical Engineering Journal in 2001"


Journal ArticleDOI
TL;DR: In this paper, the batch removal of hexavalent chromium (Vl) from wastewater under different experimental conditions using economic adsorbents was investigated, and the results indicated the endothermic nature of adsorption on TAC, SPC and CAC.

600 citations


Journal ArticleDOI
TL;DR: In this article, the authors investigated the kinetics of the methane steam reforming, accompanied by the reverse water gas shift reaction over a commercial Ni/α-Al2O3 catalyst in an integral reactor under conditions of no diffusion limitation.

543 citations


Journal ArticleDOI
TL;DR: In this paper, a review of the current understanding of electrocoalescence of water droplets in oil is presented, highlighting particularly the mechanisms proposed for droplet-droplet and droplet interface coalescence under the influence of an applied electrostatic field, as well as various factors influencing the electrocoscence phenomenon.

387 citations


Journal ArticleDOI
TL;DR: A general introductory review of the fundamental principles of monoliths as supports for catalytic gas phase reactions is presented in this article, where existing and emerging applications are briefly discussed and reference citations are given for those requiring more depth.

379 citations


Journal ArticleDOI
TL;DR: In this paper, the existing problems of supercritical water oxidation as an end-of-pipe technology are described and possible solutions are discussed, different reactor concepts are elucidated, and a suggestion for future research and technical procedure in the SCWO field is given.

353 citations


Journal ArticleDOI
TL;DR: In this paper, the authors review three separations technologies that facilitate recycling of valuable chemicals contained within wastewater streams and provide the means for extracting valuable contaminants when the concentrations of such so lutes are low.

246 citations


Journal ArticleDOI
TL;DR: In this article, the role of Fenton's reactions in the pulsed corona reactor is analyzed both experimentally and with computer simulations in the present work Experimental data shows the existence of optimal iron concentrations for the degradation of phenol, and that the formation of hydrogen peroxide by the pulsing corona discharge is dependent upon both the applied electric field and the solution conductivity.

237 citations


Journal ArticleDOI
TL;DR: In this article, steady state experiments were conducted on arsenic sorption from aqueous solutions by natural solids to test the feasibility of these materials to act as concentrator for arsenic removal from groundwater and drinking water.

229 citations


Journal ArticleDOI
TL;DR: In this paper, a quantitative comparison between CFD results and heat transfer experimental data is presented for a model geometry of 44 solid spheres in a tube with tube-to-particle diameter ratio equal to 2.

224 citations


Journal ArticleDOI
TL;DR: In this paper, the reducibility of the support and the catalytic activity of supported Pt on a series of catalysts supported on ceria-zirconia mixed oxides were investigated.

217 citations


Journal ArticleDOI
TL;DR: In this article, the removal of acid dyes from a single component solution by adsorption on activated carbon and bone char has been investigated using Langmuir and Freundlich isotherm analyses.

Journal ArticleDOI
TL;DR: In this paper, the branched pore diffusion model (BPDM) was applied to the single component adsorption of three reactive dyes on activated carbon in a batch stirred vessel.

Journal ArticleDOI
TL;DR: In this paper, the authors studied the Laminar free convection flow of air past a semi-infinite vertical plate in the presence of chemical species concentration and thermal radiation effects, and the governing boundary-layer equations for this problem are reduced to a non-similar form and are solved numerically by an implicit finite-difference technique.

Journal ArticleDOI
TL;DR: In this article, a comparison of different (isothermal and non-isothermal) models is presented, where the temperature of the gas is a function of distance and is calculated using a mathematical model, which includes the energy equation.

Journal ArticleDOI
TL;DR: In this paper, a linear falling-rate curve is used to estimate the drying times of milk powder in spray dryers. But this was only for particle sizes of greater than 2mm.

Journal ArticleDOI
TL;DR: An empirical model modified from the Langmuir isotherm model to account for the effects of ionic strength on the equilibrium characteristics of protein adsorption onto ion exchange/affinity adsorbents has been proposed and tested against experimental and literature data.

Journal ArticleDOI
TL;DR: In this paper, the authors examined the adsorption properties of clinoptilolites for the metals, copper, cadmium, lead and zinc, as well as ammonium removal.


Journal ArticleDOI
TL;DR: In this paper, a contact time optimization methodology of a two-stage batch adsorber system taking minimum contact time as the objective function has been developed, where the initial concentration of the second stage and adsorbent weight have been designated as variables.

Journal ArticleDOI
İrfan Ar1, Gulsen Dogu1
TL;DR: In this paper, the calcination reaction of 10 different limestone samples which were taken from different regions of Turkey was investigated by using thermogravimetric analysis (TGA) technique.

Journal ArticleDOI
TL;DR: In this article, the effect of CO 2 on the flame response is of thermal rather than kinetic nature, and it is found that increased CO 2 concentrations in LFG increase the amount of NO emissions per gram of consumed CH 4.

Journal ArticleDOI
TL;DR: In this article, the volumetric mass transfer coefficient was determined in a three-phase internal-loop air-lifting reactor with an enlarged degassing zone, and the effect of parameters such as the airflow rate (riser superficial gas velocities between 0.01 and 0.5 m/s), solids loading (up to 30%, v/v), solics density (1023 and 1048 kg/m 3 ) and the liquid-phase properties on kLa was studied.

Journal ArticleDOI
TL;DR: In this paper, both batch and continuous flow reactors have been used to compare the kinetics obtained for phenol oxidation at subcritical and supercritical conditions, and most of the rate expressions available in the literature have been compared to find the reasons for the discrepancies found.

Journal ArticleDOI
TL;DR: A laboratory scale prototype reactor that was built with the specific aim in operating continuously with solid substrates and without inoculation of the feed is described, and the solids mixing in the reactor have been characterised using a dispersion model.

Journal ArticleDOI
Jianren Fan1, Ligeng Qian1, Yinliang Ma1, Ping Sun1, Kefa Cen1 
TL;DR: In this paper, an Eulerian/Lagrangian approach has been employed to investigate numerically flow characteristics, heat transfer and combustion processes in a tangentially fired furnace.

Journal ArticleDOI
TL;DR: In this article, the removal of NOx using a two-dimensional fluidized bed of ultrafine TiO2 particles is investigated, and it is found that the amount of NOX removal is proportional to the specific surface area.

Journal ArticleDOI
TL;DR: In this paper, a kinetic model to represent the degradation of 2,4-D and that of equally toxic intermediate products, such as 2, 4-dichlorophenol (DCP) and chlorohydroquinone (CHQ), is presented.

Journal ArticleDOI
TL;DR: In this article, the product crystal size distribution (CSD) became bi-modal at low seed concentrations because of enormous secondary nucleation, while at high seed concentrations, the product CSD became uni-mode with the same mean mass size for both cooling modes, where the crystallization was dominated by seed growth.

Journal ArticleDOI
TL;DR: In this article, a detailed mathematical model and design methodology for a simulated moving bed reactor (SMBR) intended to invert sucrose by enzymatic action and simultaneously separate the products glucose and fructose was presented.

Journal ArticleDOI
TL;DR: In this article, the authors developed a detailed network for coke formation during thermal cracking of hydrocarbons, represented as an aromatic structure, by elementary reactions between surface species and the components present in the gas phase.