Journal of Industrial and Engineering Chemistry (J IND ENG CHEM )

Publisher: The Korean Society of Industrial and Engineering Chemistry, Elsevier


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Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: We have obtained hybrid magnetorheological suspensions (MRS-hybrid) consisting of magnetorheological suspension (MRS), magnetorheological elastomer (MRE) and polyurethane sponge foam (PSF). We measure the capacitance and resistance of a plane capacitor based on MRS-hybrid, as a function of frequency f of an electric field superimposed with a magnetic field of intensity H . The relative dielectric permittivity ϵ ′, dielectric loss factor ϵ′′ϵ′′ and electrical conductivity σ are significantly changed when 0.02 ≤ f(kHz) ≤ 200 at H = 0, 100, 200 and 400 kA/m. The static and optical dielectric constants are greatly influenced by the magnetic field intensity. We present and discuss the results using the model of dipolar approximation
    Journal of Industrial and Engineering Chemistry 11/2015; 21.
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    ABSTRACT: Heterogeneous photocatalysis involving zinc oxide (ZnO) nanofibers (NFs) has emerged as a new promising route for the cost-effective treatment of organic pollutants and the transformation of hazardous substances into benign forms. In general, it involves the development of smart approaches to reduce the harmful effects of highly toxic pollutants, which are difficult to treat. This review presents research that has been focused on the fabrication of electrospun ZnO hybrid NFs and their applications in the photodegradation of different organic pollutants that are discharged into wastewater from textile and other industrial processes. Furthermore, a short discussion on charge transfer mechanisms during photocatalytic reactions is also presented.
    Journal of Industrial and Engineering Chemistry 01/2015; 21.
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    ABSTRACT: Microfiltration coupled with flocculation has the potential to remove colloidal and dissolved matter and hence mitigate membrane fouling. This study investigates the effects of flocculation on the performance of submerged membrane microfiltration of kaolin suspension. The addition of the flocculent (ferric chloride: FeCl3) demonstrated better control of colloidal membrane fouling. The experimental results showed that trans-membrane pressure (TMP) development at optimal flocculent concentration was significantly less than it was with an unflocculated feed. In the case of 30 L/m2/h, TMP was reduced by 85% with optimum concentration of flocculent. A regression analysis conducted between cake resistance and particle deposition showed a low specific cake resistance with flocculent addition.
    Journal of Industrial and Engineering Chemistry 01/2015; 21.
  • Journal of Industrial and Engineering Chemistry 01/2015; 21:627-634.
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    ABSTRACT: The effects of microwave irradiation and solvent choice on the oxidation of acenaphthenequinone to 1,8-naphthalic anhydride were investigated. Rate constants of microwave-assisted reactions were larger than those conducted in an oil bath. Both the activation energy and pre-exponential factor of the microwave-assisted reaction changed in comparison to the conventional thermal-heating method. The outcome of the kinetic study on this oxidation reaction might be attributed to a microwave non-thermal effect.
    Journal of Industrial and Engineering Chemistry 01/2015; 21.
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    ABSTRACT: A split injection of an aluminum coagulant at the initial stage of rapid mixing was investigated to improve the water permeability of a cake layer composed of chemical flocs on a microfiltration membrane surface. The split ratio of the first to second injections was changed to find an optimized injection condition. With an increase in the split ratio, the cake compressibility index decreased because compact chemical flocs were produced with reduced dosage of the second injection, but the specific cake resistance increased due to small size of chemical flocs with the insufficient amount of coagulant at the second injection. At a small split ratio, the particle size distribution of the split injection was similar to that of normal single injection, and the compressibility index was small, leading to better water permeability of the cake layer at higher pressure.
    Journal of Industrial and Engineering Chemistry 01/2015; 21.
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    ABSTRACT: To improve dispersion stability of ZrO2 nanoparticles dispersed in a poly(4-vinylphenol-co-methyl methacrylate) (PVP-co-PMMA)/2-methoxyethanol solution, they were coated with poly(methyl methacrylate) (PMMA) by dispersion polymerization. Cross-linked PMMA-coated ZrO2 particles were characterized by SEM and TEM. Chemical composition was examined by FT-IR spectroscopy. Mass ratio of PMMA to the ZrO2 was analyzed by TGA. Density (1.97 g/cm3) of the PMMA coated ZrO2 particles was much lowered compared to 5.46 g/cm3 of ZrO2, and the improved dispersion stability of the coated particles in the PVP-co-PMMA/2-methoxyethanol solution was demonstrated using a Turbiscan.
    Journal of Industrial and Engineering Chemistry 01/2015; 21.
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    ABSTRACT: The performance of multi-stage circulating fast fluidized bed membrane reformers (CFFBMRs) for production of ultraclean hydrogen is investigated in comparison to a single circulating fast fluidized bed membrane reformer (CFFBMR). The two-stage reformer configuration gives significant increase in the methane conversion of 27.46% and ultraclean hydrogen yield of 29.61% compared to the single CFFBMR. The concept of the multi-stage short reformers policy is introduced. Impressively, substantial increase of ultraclean hydrogen yield of 83.91% is achieved.
    Journal of Industrial and Engineering Chemistry 01/2015; 21.
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    ABSTRACT: For complex industrial processes with multiple operating conditions, a novel fast monitoring method, called up-down multi-model dynamic principal component analysis, is proposed with incomplete modeling data types in this paper. The method firstly classifies the process into several stages according to the operations. In each stage the data with similar operations are clustered together. Multiple model structures are constructed along with the variation of the cluster number. When on-line monitoring, the up-down monitoring method is proposed to monitor a new batch type. The effectiveness of the proposed monitoring method is demonstrated through the 120 t ladle furnace (LF) steelmaking process.
    Journal of Industrial and Engineering Chemistry 01/2015; 21.
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    ABSTRACT: Ceria promoted nickel catalysts supported on nanocrystalline MgO were prepared and employed in methane reforming with carbon dioxide. The prepared catalysts were characterized by XRD, BET, SEM, TPO and TPR techniques. The effect of nickel loading on the catalytic performance of catalysts was investigated and the results showed that 10%Ni–7%CeO2/MgO catalyst possessed the highest catalytic activity. The results also showed that increasing in CO2/CH4 molar ratio decreased the amount of deposited carbon and increased the methane conversion.
    Journal of Industrial and Engineering Chemistry 01/2015; 21(21):717-722.
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    ABSTRACT: Based on flow curve of graphene oxide coated polymeric microsphere based electrorheological (ER) fluid, model independent yield stress and shear rate, , were determined using a Tikhonov regularization technique developed to solve the inverse problem of the shear rate in Couette flow viscometry. The model independent yield stress data were compared with that extracted from yield stress fluid models of Bingham plastic and Cho-Choi-Jhon (CCJ) used to fit the data. The agreement between model independent and Bingham yield stress was excellent, while the CCJ model yield stresses are generally slightly higher.
    Journal of Industrial and Engineering Chemistry 01/2015; 21.
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    ABSTRACT: Thermolysin family proteases are related to various diseases such as bacterial infections, cholera, gastritis and peptic ulcers, and gastric carcinoma. Hence, assay materials capable of the sensitive and specific assessment of thermolysin activity need to be developed for the detection of those diseases. In this study, simple peptides containing an unusual fluorescent amino acid, dityrosine, were tested for the assay of thermolysin. Various types of DBDY-(amino acid-INH)2 were synthesized from the conjugation of N,N′-diBoc-dityrosine (DBDY) with two molecules of amino acid and isoniazid (INH). Among these, DBDY-(Phe-INH)2 and DBDY-(Ile-INH)2 were found to be the most promising substrates for thermolysin assays. The hydrolysis reaction occurring between DBDY and Phe (or Ile) resulted in the release of Phe-INH and Ile-INH, and the fluorescence of DBDY was recovered. The reaction was found to follow Michaelis-Menten kinetics, and the KM and kcat/KM values were in the ranges of 1.91–3.95 μM and 2.43 × 104–6.03 × 104 M−1 s−1, respectively, which were comparable to other protease assay materials. Considering the simple preparations of DBDY-(Phe-INH)2 and DBDY-(Ile-INH)2, they are believed to be useful for the selective and sensitive assay of thermolysin.
    Journal of Industrial and Engineering Chemistry 01/2015; 21.
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    ABSTRACT: In this paper, a fixed-bed reactor is used to study the influence of different conditions on carbon catalyzed CO2–CH4 reforming. The surface structure and functional groups of carbonaceous material have been characterized through SEM, XPS, XRD, BET and chemical titration before and after the reaction. Studies have revealed that under non-catalytic condition, methane pyrolysis happens first, followed by the gasification reaction between CO2 and carbon deposit produced from the pyrolysis. While with carbonaceous material, CO2 gasification, methane pyrolysis and CO2–CH4 reforming can take place at the same time, with the reforming as the main reaction, CO2 gasification and methane pyrolysis as the side reaction. Catalytic activity varies from one carbonaceous material to another, but their reaction trend is the same on the whole. Those high specific surface area carbonaceous materials show higher catalytic activity. The increase in reaction temperature and residence time of the reforming can improve the conversion of reactant gas. Adjusting the partial pressure of methane can control carbon–hydrogen ratio of the synthesis gas. XPS and XRD characterizations demonstrate that the structural ordering of carbonaceous materials becomes a little messier after the reforming reaction, and the number and content of oxygen functional groups decrease. That means these oxygen functional groups on the surface of carbonaceous materials are involved in the reforming and these groups along with pore structure on the surface are the major factors influencing the catalytic properties. Different oxygen species make the nature of electrical energy on the surface different; the catalytic activity depends on the polarity of oxygen from different species. Those whose polarity is strong have strong activity. The dipole force can be associated with methane in the form of hydrogen bond, so that the material can display strong activity. Those whose polarity is weak have weak activity, the catalytic activity is weak too. The results of chemical titration and XPS characterization show that the oxygen in the anhydride and lactone structures on the surface of carbonaceous materials are active oxygen, and which is the main active component, it can reduce the activation energy of methane dehydrogenation.
    Journal of Industrial and Engineering Chemistry 01/2015; 21.
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    ABSTRACT: The inhibition action of Aloe Vera leaf extract as environmentally friendly inhibitor for the corrosion protection of stainless steel in 1 M H2SO4 solution was studied by electrochemical techniques as well as scanning electron microscope. The results of linear polarization and electrochemical impedance spectroscopy proved the effectiveness of Aloe Vera extract as concentration increased. Corrosion inhibition of Aloe extract was also studied by electrochemical noise (EN). Employing EN, different aspects like transient analysis, noise resistant and characteristic charge were characterized. Moreover, a literature review of Aloe Vera characterization using high-performance liquid chromatography and GC-MS was carried out.
    Journal of Industrial and Engineering Chemistry 01/2015; 21.