Chemical Engineering Communications (Chem Eng Comm )

Description

Chemical Engineering Communications provides a forum for the rapid publication of papers in all areas of chemical engineering. Full length papers, reviews and short communications are welcome, on subjects such as experimentation (both techniques and data), new theoretical models, commentaries on and discussion of previously published work and letters to the editor. Since the emphasis is on original work in progress, the editors also encourage submission of accounts of tentative results, provided they are well documented. Every effort will be made to ensure rapid publication. Papers which are accepted will be evaluated by the editors and referees on the basis of quality and originality of the work as well as the style and presentation of the paper.

Impact factor 1.05

  • 5-year impact
    0.95
  • Cited half-life
    0.00
  • Immediacy index
    0.25
  • Eigenfactor
    0.00
  • Article influence
    0.25
  • Website
    Chemical Engineering Communications website
  • Other titles
    Chemical engineering communications (Online), Chemical engineering communications
  • ISSN
    1563-5201
  • OCLC
    50409813
  • Material type
    Document, Periodical, Internet resource
  • Document type
    Internet Resource, Computer File, Journal / Magazine / Newspaper

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: An empirical model was developed using the experimental results, to predict the removal of nickel ions under the effect of an external electric field applied to an ultrafiltration membrane, electroultrafiltration process (EUF). Two commercial membranes from Millipore PLCC5 (regenerated cellulose, 5kDa) and PBCC5 (polyethersulfone, 5kDa) were selected to conduct the experiments. The rejection of nickel ions increases with an increment of the applied voltage. The maximum rejection of the metal was found to be 60% obtained with the PBCC5 membrane and applying a potential difference of 3.5 and 4.5 volts. The results have shown that the application of an external electric field increases the removal capacity of UF membranes and enhances EUF system efficiency. The experimental data for removal of nickel ions in the system were analyzed using the Takagi-Sugeno-Kang (TKS) fuzzy model. The goodness of fit for the TKS fuzzy model used was at least 98%.
    Chemical Engineering Communications 03/2015;
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    ABSTRACT: Phase equilibrium calculations (PEC) and phase stability (PS) analysis of reactive and non-reactive systems problems are important for the simulation and design of chemical engineering processes. These problems, which are challenging multi-variable and non-convex, require optimization techniques that are both efficient and effective in finding the solution. Stochastic global optimization algorithms, especially swarm algorithms, are promising tools for such problems. In this study, Monkey Algorithm (MA), Gravitational Search Algorithm (GSA) and Krill Herd Algorithm (KHA) were used to solve phase stability, phase equilibrium and chemical equilibrium problems. We have also studied the effect of adding a local optimizer at the end of the stochastic optimizer run. The results were compared to determine the strengths and weaknesses of each algorithm. When a local optimizer was used, MA was found to be a reliable algorithm in solving the problems. GSA had relatively the least numerical effort for all problems among the three algorithms but with low reliability. KHA was more reliable than other two algorithms without the use of a local optimizer. The performance of GSA, MA, and KHA was compared with Firefly Algorithm (FA) and Cuckoo Search (CS). In summary, this study found that CS algorithm was more reliable than the newly tested algorithms. Nevertheless, MA and GSA algorithms, when combined with a local optimizer, solve the thermodynamic problems as reliably and efficiently as CS.
    Chemical Engineering Communications 01/2015;
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    ABSTRACT: The corrosion inhibition potentials of Mentha rotundifolia oil on carbon steel in 1 M HCl was studied at different concentrations via gravimetric, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarisation techniques. Polarization curves reveal that Mentha rotundifolia oil is a mixed type inhibitor. Changes in impedance parameters (charge transfer resistance Rt, and double-layer capacitance Cdl) were indicative of adsorption of Mentha rotundifolia on the metal surface, leading to the formation of a protective film. The effect of the temperature on the corrosion behaviour with addition of the optimal concentration of Mentha rotundifolia oil was studied in the temperature range 308 and 338 K. Adsorption of oil on the carbon steel surface is found to obey the Langmuir adsorption isotherm. Attempts to explain the inhibitory action were carried out using density functional theory (DFT) at B3LYP/6-31G(d,p) level. Quantum chemical parameters most relevant to its potential action as corrosion inhibitor such as EHOMO (highest occupied molecular orbital energy), ELUMO (lowest unoccupied molecular orbital energy), energy gap (ΔE) and Mulliken charges have been calculated and discussed. The theoretical results were found to be consistent with the experimental data.
    Chemical Engineering Communications 12/2014;
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    ABSTRACT: Magnetite (Fe3O4) and Zn0.5Fe0.5Fe2O4 nanoparticles (NPs) were synthesized via sonochemical coprecipitation reactions with moderate ultrasound irradiation. The structure and crystalline=particle sizes of the synthesized NPs were determined by X-ray powder diffraction (XRD) and transmission electron microscopy (TEM), and the magnetic properties were measured by vibrating sample magnetometry (VSM). The results show that NPs of smaller size and narrower size distribution can be synthesized via coupling of moderate ultrasound irradiation in coprecipitation reactions. In addition, magnetic NPs prepared in the presence of ultrasonic irradiation exhibit improved magnetic properties.
    Chemical Engineering Communications 12/2014; 202(5):616-621.
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    ABSTRACT: In this paper, one dimensional transient moisture and solute diffusions in the spherical geometry during osmotic dehydration was modeled by exact analytical method and two approximate models. Approximate models have been developed based on a parabolic and power law profile approximation for moisture and solute concentrations in the spatial direction. The proposed models were validated by experimental water loss and solid gain data obtained from osmotic dehydration of spherical cherry tomatoes in NaCl salt solution. Experiments were conducted at six combinations of two temperatures (30 and 40°C) and three solution concentrations (10%, 18% and 25% w/w). A two-parameter model was used to predict moisture loss and solute gain at equilibrium condition, and moisture and solute diffusivities were estimated by fitting the experimental moisture loss and solute gain data to the Fick's second law of diffusion. The values of mean relative errors for exact analytical, parabolic and power law approximation methods respect to the experimental data were estimated between 6.58 and 9.20%, 13.28 and 16.57% and 5.39 and 7.60%, respectively. Although the parabolic approximation leads to simpler relations, the power law approximation method results in higher accuracy of average concentrations over the whole domain of dehydration time.
    Chemical Engineering Communications 10/2014;
  • Chemical Engineering Communications 07/2014;
  • Chemical Engineering Communications 07/2014;
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    ABSTRACT: Pressure distribution, caused by ultrasonic wave propagation, has the crucial effect on efficiency of sonoreactor for crude oil upgrading. In this study, acoustic pressure distribution was computed by numerical solution of acoustic wave propagation equation in crude oil sonoreactor. By analyzing of numerical simulation results, optimum geometrical and operational parameters, comprising type and probe size, probe depth in bulk of crude oil, dimensions, shape of reactor, frequency, and sound power, were discussed for the highest possibility of cavitation, chemical, and physical changes. Moreover, the effect of probe location on pressure distribution was investigated. The results show the important effect of probe location on pressure distribution due to change of wave reflection angles.
    Chemical Engineering Communications 04/2014;
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    ABSTRACT: The inhibition effect of glutamic acid (Glu) towards corrosion of aluminum in 0.1 M HCl solution was investigated using linear polarization (LPR), potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) methods. Polarization curves revealed that Glu acted as a mixed type inhibitor. The values of polarization resistance obtained by LPR and EIS were consistent in showing that inhibition efficiency increased with increasing concentration of Glu. The inhibition occurs by adsorption of Glu on the metal surface and evidence of this was given by the equivalent circuit analysis of EIS results. The adsorption process was found to obey the Hill de Boer isotherm with a standard free energy of adsorption of -60.45 kJ mol-1. Surface analysis by means of X-ray photoelectron spectroscopy (XPS) was performed to provide chemical characterization of the adsorbed layer. The N 1s spectrum showed the presence of ionized (NH3+ ) and neutral (NH2) amino group. The corrosion inhibition was attributed to a chemisorption process with Glu molecules forming a stable chelate on the metal surface
    Chemical Engineering Communications 03/2014; 201(7):855-869.
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    ABSTRACT: The study investigates the effectiveness and energy conservation potential of a high rate hybrid up-flow anaerobic sludge blanket (UASB) reactor treating a combination of domestic waste activated sludge and distillery's spent wash. Analysis of the results revealed good organic removal efficiency at a hydraulic retention time of 5 days. However, the economic feasibility was not studied. This corresponded to an average percentage COD removal of 65%, an average percentage BOD removal of 40.41%, and an average total suspended solids removal of 87%. Biogas volumes were measured using a water displacement technique, and a steady biogas production rate of 2 L/day was attained after 71 days of substrate and nutrient addition. Two well-known mathematical models were used to estimate biogas volume. Hill's model was found to be in better agreement with experimental results; it is within ±10%. Based on the results obtained, the construction of a hybrid anaerobic sludge blanket reactor at a water treatment facility for the biodegradation of distillery spent wash and domestic waste to produce biogas and energy is unquestionably a lucrative and sustainable venture.
    Chemical Engineering Communications 02/2014;
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    ABSTRACT: Prediction of the behaviour of convective mixing and the effectiveness of this mechanism is essential for permanent sequestration of CO2 in deep saline aquifers. Simulation of the diffusion-convection mechanism at a large scale is very expensive and time-consuming; therefore scaling relationships can be used to find suitable candidates for storage sites. In this study, scaling analysis is performed for the convective mixing of CO2 in saline aquifers based on experimental results. The scaling relationships are presented for the prediction of convective dissolution behaviour. In the presented scaling analysis, different systems with a wide range of Rayleigh numbers were used. All experiments were conducted in a dissolution cell with different ranges of grain sizes. The pressure decay data are used to determine the dissolution rate of CO2, Sherwood number, and convective flux. In addition, the fraction of ultimate dissolution is calculated for each experiment to investigate the mixing regimes (convective mixing and diffusive mixing). The results indicate that the mixing of CO2 in water can be approximated by a scaling relationship for the Sherwood number and convective flux. These relations can be used in the implementation of large scale CO2 storage in deep saline aquifers.
    Chemical Engineering Communications 02/2014;