Industrial & Engineering Chemistry Research (IND ENG CHEM RES )

Publisher: American Chemical Society, American Chemical Society


For industrial chemists and chemical engineers, Industrial & Engineering Chemistry Research is the reliable and current source of new fundamental research, design methods, process design and development, and product research and development. This state-of-the art journal contains original studies in the areas of: Applied Chemistry, Kinetics, Catalysis, and Reaction Engineering, Materials and Interfaces, Process, Design and Control, Separations, General Research.

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    Industrial & engineering chemistry research, Industrial and engineering chemistry research, I & EC research
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    Journal / Magazine / Newspaper, Internet Resource

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American Chemical Society

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Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: Here, we report a simple method for the immobilization of glucose oxidase (GOx)/Poly- L-Lysine (PLL) on a chemically reduced graphene (CRGO/MnO2) composite film for a modified glassy carbon electrode (GCE). The CRGO-MnO2 film produced was characterized by various techniques such as Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), UV-vis spectroscopy, X-ray Diffraction XRD, and electrochemical impedance spectroscopy (EIS). MnO2 particles were uniformly deposited on the CRGO surface through easily adoptable electropolymerization method. The as prepared (GOx-PLL/MnO2/CRGO) composite film exhibits a surface coverage concentration (Г) of 2.68 ×10-10 mol/cm-2, indicative of high enzyme loading as well as excellent electron transfer properties due to the GOx with a rate constant (ks) of 4.92 s-1. A glucose biosensor has been fabricated which exhibits a wide linear range for the detection of glucose from 0.04 to 10 mM with a detection limit of 0.02 mM (S/N=3). The inexpensive, reliable and sensitive sensing platform based on MnO2/CRGO nanocomposite electrode provides wide potential applications in clinical, environmental, and food analysis.
    Industrial & Engineering Chemistry Research 09/2014;
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    ABSTRACT: Neodymium, nitrogen and sulphur tridoped titania (Nd,N,S-TiO2) was decorated on reduced graphene oxide (rGO) and multiwalled carbon nanotubes (MWCNTs) via a simple sol-gel method. The prepared photocatalysts were characterised by FE-SEM-EDX, TEM, UV-Vis, BET, FTIR, Raman and XRD. Aqueous solutions of eriochrome black T (EBT) and eosin blue shade (EBS) were used to evaluate the photocatalytic activity of the composites under simulated solar light irradiation. Degradation of the dyes was performed in single and mixed dye solutions. The reduced graphene based photocatalyst (rGO/Nd,N,S-TiO2) showed improved photocatalytic activity over the MWCNT/Nd,N,S-TiO2 composite in both single and mixed dye solutions. In the single dye solutions, a maximum degradation of 99.3% and 94.6% was achieved for EBS and EBT, respectively. Moreover, a maximum degradation efficiency of 65.7% and 58.9% was attained by rGO/Nd,N,S-TiO2 for EBS and EBT, respectively, from mixed dye solutions. These experimental results suggest the potential application of the composite photocatalysts for dye pollution remediation. Furthermore, radical scavenging experiments confirmed the superoxide and hydroxyl radicals as the active species during dye degradation. Total organic carbon analyses revealed a fairly high degree of complete mineralisation of both dyes reducing the potential formation of toxic degradation
    Industrial & Engineering Chemistry Research 08/2014;
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    ABSTRACT: The present work uses a scale down industrial pneumatic conveying and drying system in order to develop control-oriented models and suitable robust control strategies for the air preheating furnace of the system. A better control system has been achieved by utilizing the benefits of integrating first principle models, system identification techniques and parametric robust control methods. Though these processes are widely used in drying and transmission of different food, pharmaceutical and industrial products in the form of powder like fine-grained material but suitable control oriented thermal models for these processes have not been studied. In the work the air preheating furnace of a pneumatic conveying and drying system is initially modeled with first principles. The novel dynamic models derived from first principles is intended to evaluate dynamic changes in outlet air temperature corresponds to changes in current input to heating coils, air flow velocity and ambient temperature. Then a continuous time (CT) data driven model identification technique based on Simplified Refined Instrumental Variable (SRIV) approach has been applied in order to identify the model parameters as per the desired structures. The identified systems were then validated with different sets of experimental data, and found to be closely correlated. Finally a novel robust control law i.e. refined particle swarm optimization (PSO) enabled automated Quantitative Feedback Theory (QFT) (Refined PSO-QFT) has been proposed and implemented in order to improve the temperature control system of the pneumatic conveying and drying process.
    Industrial & Engineering Chemistry Research 08/2014;
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    ABSTRACT: Methodologies to determine the Design Space of a pharmaceutical product, within which continuous improvement can be implemented and postapproval changes in material attributes and process parameters can be introduced without prior approval, are presented. The type of methodology used depends on the type of experimental data obtained for the purpose of determining the Design Space. However, when one is unsure about the data collected to determine the Design Space, one can determine the quality of the data from successive application of the various methods and evaluation of the desirability measure for each method. The Design Spaces for a two- and three-process tablet manufacturing are determined by Response Surface Method (RSM), Bayesian Post Predictive Approach (BPPA), and Artificial Neural Networks (ANN), based on local or global specification limits of the response variables provided by multiresponse optimization and overlapping responses, respectively. The Response Surface Method is the most effective of these methods in determining the Design Spaces for the aforementioned data sets, confirming that the particular data are complete and lack uncertainty or structure, the specific features that the Bayesian Post Predictive Approach and Artificial Neural Networks methods are suited to address, respectively.
    Industrial & Engineering Chemistry Research 07/2014; 53(30):12003–12009.
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    ABSTRACT: In this experimental study we propose the use of highly nonuniform electric field to emulsify a leaky dielectric oil into another oil. Specifically, a pin–plate electrode system is used to emulsify castor oil into silicone oil. The method is suitable for the emulsification of a higher conductivity leaky dielectric oil dispersed in a lower conductivity medium and is suitable for an already existing emulsion, unlike electrospray methods. The process is stabilized by charging of the dispersed phase and the associated electrohydrodynamic flow. A balance of electrocoalescence and breakup leads to a stationary drop size distribution. A short process time indicates its suitability for continuous operation.
    Industrial & Engineering Chemistry Research 07/2014; 53(34):13488–13496.
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    ABSTRACT: The vapor-phase cracking of 4-vinylguaiacol has been investigated in a nonisothermal, laminar-flow reactor at temperatures between 300-900°C and a residence time of one second. Products identified by gas chromatography were oxygenated compounds such as phenols, cresols, furans, ketones, and aldehydes, single-ring and polycyclic aromatic hydrocarbons, C1-C6 hydrocarbon gases, and carbon monoxide. Temperature had a marked effect in governing the overall product composition. Conversion of 4-vinylguaiacol to products increased above 400°C and was completed at 550°C. Reaction rate parameters derived from the conversion data were A = 10^13 s-1 and Ea = 45.3 kcal mol-1. The oxygenated compounds were observed as products in the range 450-800°C, peaking in yields below 700°C. The aromatic hydrocarbons and light gases dominated the product composition above 600°C, especially at 900°C, the highest temperature investigated. Based on the experimental data showing the effect of temperature on product composition, reaction pathways leading to products formation are proposed.
    Industrial & Engineering Chemistry Research 07/2014; 53(31):12527–12536.
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    ABSTRACT: An empirical model using response surface methodology (RSM) is proposed to investigate the role of parameters, such as, preparation pressure and binder contents on the porosity and flexural strength of a tubular low-cost ceramic membrane based on central compact design (CCD). Preparation pressure and binder contents are selected as input parameters to obtain controlled porosity with considerable strength of membrane. The optimum preparation pressure is found to be at 9.81 MPa with the sodium metasilicate and boric acid contents of 7.50 % each providing a microfiltration range membrane. The optimization study reveals that the errors between the experimental and predicted values are below 2 %. FESEM images clearly unveil a consolidated microstructure of the ceramic membrane. Acid-alkali test conveys that there is no major change in elemental composition due to the presence of binders in ceramic processing. The cost of the optimized membrane is estimated at around $332/m2.
    Industrial & Engineering Chemistry Research 07/2014; 53:12319.
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    ABSTRACT: Trin-octylphosphine oxide (TOPO) is a widely used extractant because of its high extractive ability. However, there is no systematic research on the thermodynamics of TOPO/n-dodecane in the separation of hydrochloric acid (HCl) from aqueous solution. In this study, the liquid−liquid equilibrium (LLE) system (water + n-dodecane + TOPO + HCl) was investigated. Both the equimolar series and slope methods were used to determine the composition of the complex formed in the equilibrated organic phase. The form of the water molecules in the equilibrated organic phase was first investigated by the thermodynamic method. The thermodynamic model was established with the Pitzer equation for aqueous phase and both Margules and organic Pitzer equations for the organic phase. Two chemical equilibrium constants and their corresponding interaction parameters were regressed from experimental LLE data. The correlated results were in good agreement with the experimental data. Furthermore, this model can also be used to predict the organic phase composition for this system. This confirmed that the thermodynamic model chosen was suitable for the extraction system.
    Industrial & Engineering Chemistry Research 07/2014; 53(30):12111-12121.
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    ABSTRACT: Optimization of process conditions for biodiesel production through methanolysis of Indian mustard oil (MO) using Magnesium-impregnated-pre-calcined fly ash heterogeneous base catalyst has been performed employing ‘response surface methodology’ based on four factors-three level ‘face centered central composite design’. A quadratic polynomial model was formulated for estimation of biodiesel (FAME, fatty acid methyl ester) yield by multivariate regression analysis. Optimal parametric values corresponding to maximum experimental FAME yield (i.e. 97.55 wt.%) were 13.13:1 methanol to MO molar ratio, 950°C calcination temperature, 3.44 wt.% catalyst concentration and 890 rpm stirrer speed. The optimal magnesium base catalyst possessed 9.07 m2 /g BET specific surface area, 0.0255 cc/g catalyst pore volume with a modal pore diameter of 6.5 nm and appreciable (11.52 mmolHCl/g catalyst) catalyst basicity. The formulated B10 biodiesel conformed to ASTM/European specifications. Thus, the optimally prepared low-cost and reusable catalyst can craft economical avenue for fuel grade biodiesel synthesis from mustard oil.
    Industrial & Engineering Chemistry Research 07/2014; 10.1021/ie501084z.
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    ABSTRACT: Tungsten, in varying amounts, was incorporated into a SBA-16 structure via a one-pot direct synthesis method under an acidic medium using Pluronic F127 triblock co-polymer as a template and n-butanol as a co-surfactant. Tetraethyl orthosilicate (TEOS) and sodium tungstate were used as the Si and W sources, respectively. The resulting materials (denoted as W-SBA-16) are characterized for structural ordering, textural properties, and types of tungsten incorporation by techniques such as small-angle X-ray scattering (SAXS), X-ray diffraction (XRD), N2 sorption, high-resolution transmission electron microscopy (HR-TEM), diffuse-reflectance ultraviolet–visible light (DR-UV-vis) microscopy, temperature-programmed reduction in a hydrogen atmosphere (H2-TPR), and temperature-programmed desorption of ammonia (NH3-TPD). The surface area (823–354 m2/g) and pore volume (0.71–0.44 cm3/g) of the W-SBA-16 materials are found to decrease with an increase in tungsten loading (from 2.7 wt % to 30.4 wt % of the total sample). Isolated framework WO4 species and octahedrally coordinated polytungstate species are observed at all tungsten loadings, while bulk WO3 species are observed only at higher tungsten loadings. The W-SBA-16 materials display significant acidity that is tunable with tungsten loading, and they selectively catalyze the epoxidation of cyclohexene to cyclohexene oxide with H2O2 as an oxidant. The fact that bulk WO3 alone does not catalyze the reaction implies that the framework-incorporated W species and/or the polytungstate species are responsible for the observed catalysis. For this reaction, three-dimensional cubic mesostructured catalysts (W-SBA-16, W-KIT-6, and W-KIT-5) perform better than two-dimensional mesostructured (W-SBA-15) material. The problem of gradual tungsten leaching must be overcome for these catalysts to have practical utility.
    Industrial & Engineering Chemistry Research 06/2014;

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