OICC PRESS Study of holdup and slip velocity in an L-shaped pulsed sieve-plate extraction column Volume 10 (2019) Issue 1, March 2019 2023 10 18 Study of holdup and slip velocity in an L-shaped pulsed sieve-plate extraction column https://doi.org/10.1007/s40090-018-0167-y EN Elham Mohammadi Chemical Engineering Department, Tarbiat Modares University, P.O. Box: 14115‑143, Tehran, Iran Jafar Towfighi Chemical Engineering Department, Tarbiat Modares University, P.O. Box: 14115‑143, Tehran, Iran Jaber Safdari Materials and Nuclear Fuel Research School, Nuclear Science and Technology Research Institute, Tehran, Iran Mohammad H. Mallah Materials and Nuclear Fuel Research School, Nuclear Science and Technology Research Institute, Tehran, Iran Journal Article 2023 10 18 High-end applications require a very tall vertical extraction column in some cases which deteriorates protection against radiation and cannot be employed for indoor applications. On the other hand, horizontal extraction columns offer higher efficiency and pretension, but lower maximum throughput. In order to address this issue, the L-shaped pulsed extraction column is a new type of extractors which were recently introduced for such applications with area constraints. The objective of this study is to evaluate the effects of operating parameters and physical properties on the variation of holdup and slip velocity in this type of extractors for three liquid systems including toluene–water, butyl acetate–water and n butanol–water without and under mass transfer condition. A comprehensive investigation on the determination of predictive ability of available correlations for the holdup and slip velocity in pulsed plate columns has been conducted. Finally, new correlations are proposed for prediction of these parameters regarding operational conditions and physical properties.

OICC PRESS Adsorption and inhibitive properties of seroquel drug for the corrosion of zinc in 0.1 M hydrochloric acid solution Volume 10 (2019) Issue 1, March 2019 2023 10 18 Adsorption and inhibitive properties of seroquel drug for the corrosion of zinc in 0.1 M hydrochloric acid solution https://doi.org/10.1007/s40090-018-0168-x EN A. M. Guruprasad Department of Chemistry, Mangalore Institute of Technology and Engineering, Moodbidri, Mangalore, Karnataka, India H. P. Sachin Department of Chemistry, Jawaharlal Nehru National College of Engineering (JNNCE), Shivamogga, Karnataka, India G. A. Swetha Department of Chemistry, BMS Institute of Technology, Avalahalli, Bangalore, Karnataka, India B. M. Prasanna Department of Chemistry, Jain Institute of Technology, Davanagere, Karnataka, India Journal Article 2023 10 18 Inhibition action of seroquel on corrosion of zinc in 0.1 M HCl solution was investigated using weight loss, electrochemical potentiodynamic polarization and impedance spectroscopic techniques. Corrosion inhibition efficiency showed the positive effect with increase in concentration of inhibitor and with the increase in temperature. Results obtained from all the methods are in good agreement with each other. Inhibition effect of inhibitor is due to the adsorption of seroquel molecule on zinc surface from bulk of the solution and the process of adsorption follows Temkin’s adsorption isotherm. Potentiodynamic polarization studies revealed that seroquel acts as a mixed type of inhibitor. Corrosion inhibition mechanism is explained by activation and thermodynamic parameters. Surface morphology of the corroded metal was studied by scanning electron microscopic studies and FT-IR spectrum of the corrosion product further confirms the process of adsorption of seroquel on metal surface.

OICC PRESS Corrosion inhibition and adsorption behavior of phytic acid on Pb and Pb–In alloy surfaces in acidic chloride solution Volume 10 (2019) Issue 1, March 2019 2023 10 18 Corrosion inhibition and adsorption behavior of phytic acid on Pb and Pb–In alloy surfaces in acidic chloride solution https://doi.org/10.1007/s40090-019-0169-4 EN Hany M. Abd El‑Lateef Department of Chemistry, Faculty of Science, Sohag University, Sohâg 82524, Egypt Abdel‑Rahman El‑Sayed Department of Chemistry, Faculty of Science, Sohag University, Sohâg 82524, Egypt Hossnia S. Mohran Department of Chemistry, Faculty of Science, Sohag University, Sohâg 82524, Egypt Hoda A. El-Shafy Shilkamy Department of Chemistry, Faculty of Science, Sohag University, Sohâg 82524, Egypt Journal Article 2023 10 18 The corrosion and corrosion inhibition of Pb and Pb–In alloys in HCl solution, were investigated. The study was performed in the absence and presence of the phytic acid (PA) inhibitor using potentiodynamic polarization and electrochemical impedance spectroscopy measurements, and complementary by scanning electron microscope (SEM) and X-ray spectroscopy analysis (EDX) investigations. The obtained outcomes showed that the PA is efficient corrosion inhibitor for Pb and Pb–In alloys in HCl solution. The inhibition efficiency (η %) for Pb and its investigated alloys increases with an increase in the concentration of PA and decreases with increasing temperature. The maximum inhibition efficiency (≈ 80%) was obtained at 1 × 10−3 M of the PA inhibitor. Langmuir adsorption isotherm fits well the experimental data. SEM/EDX observations of the electrode surface confirmed the existence of an adsorbed film. One can conclude that the increase in activation energy with increasing additive concentration, in addition to the decrease in η % in the presence of inhibitor with temperature, is suggestive of physical adsorption of the inhibitor molecules on the surface of Pb and Pb–0.5In alloy.

OICC PRESS The effect of octylated diphenylamine and Irganox 1520 antioxidants on the stability of polybutadiene rubber Volume 10 (2019) Issue 1, March 2019 2023 10 18 The effect of octylated diphenylamine and Irganox 1520 antioxidants on the stability of polybutadiene rubber https://doi.org/10.1007/s40090-019-0170-y EN Alireza Fazlali Department of Chemical Engineering, Faculty of Engineering, Arak University, Arāk, Iran 0000-0001-8970-2479 Vahab Ghaleh Khondabi Department of Chemical Engineering, Faculty of Engineering, Arak University, Arāk, Iran Mohammad Javad Sharifi Department of Chemical Engineering, Faculty of Engineering, Tehran University, Tehran, Iran Mohammad Amir Nikoohemmat Department of Chemical Engineering, Faculty of Engineering, Arak University, Arāk, Iran Journal Article 2023 10 18 One of the serious problems in polybutadiene rubber (PBR) production units is the color change in products, which is due to aging and the inability of antioxidants to protect the product, especially at high temperatures. In this study, the effects of amine-type antioxidant [octylated diphenylamine (OD)] and non-amine-type antioxidant (Irganox 1520) on the color yellowness, gel content and thermal stability of PBR, at concentrations of 500, 1000, 1500, 2500 and 4000 ppm, at temperature of 110 °C, and different aging times (1–10 h) were investigated. The results showed that the polymer with Irganox 1520 antioxidant has a higher thermal stability, less gel formation and lower color than polymer containing OD antioxidant; therefore, the Irganox 1520 antioxidant was more suitable.

OICC PRESS Investigation of lime usage impacts on bauxite processability at ETI Aluminyum Plant Volume 10 (2019) Issue 1, March 2019 2023 10 18 Investigation of lime usage impacts on bauxite processability at ETI Aluminyum Plant https://doi.org/10.1007/s40090-019-0171-x EN Hüseyin Arıkan Seydisehir AC Engineering Faculty, Department of Mechanical Engineering, Necmettin Erbakan University, Konya, Turkey 0000-0001-6168-1960 Gökhan K. Demir ETI Aluminium Inc, 42370 Seydişehir/Konya, Turkey Sema Vural Seydisehir AC Engineering Faculty, Department of Materials and Metallurgical Engineering, Necmettin Erbakan University, Konya, Turkey 0000-0001-6168-1960 Journal Article 2023 10 18 ETI Aluminyum A.Ş., the primary aluminium manufacturer of Turkey, is also one of the major integrated plants of the world capable of performing production from mining until end product. The alumina refinery was designed on a certain boehmitic bauxite quality basis. However, bauxite properties have changed over the years, resulting in the urgent need for process optimization to not only keep the refinery cost efficient, but also prevent serious bottlenecks in the near future. Lime can be used to overcome problems when using bauxites with specific and variable chemical and mineralogical characteristics. Although lime is extensively used when processing diasporic bauxites, the studies on boehmitic bauxites and the overall effects on the process are limited. In this paper, lime impact was investigated at all stages of the Bayer process including the effect on alumina quality, energy and raw material consumptions. The results showed significant improvements in the product quality as well as recordable savings on consumptions.

OICC PRESS Modeling, simulation and optimal control strategy for batch fermentation processes Volume 10 (2019) Issue 1, March 2019 2023 10 18 Modeling, simulation and optimal control strategy for batch fermentation processes https://doi.org/10.1007/s40090-019-0172-9 EN Neba Fabrice Abunde Department of Chemical Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana Nana Yaw Asiedu Department of Agricultural and Biosystems Engineering, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana Modeling, simulation and optimal control strategy for batch fermentation processes The use of fermenters at large scale is usually hampered by sub-optimal conditions in terms of yield and productivity, along with the low tolerance of strains to process stresses, such as substrate and product toxicity, and other fermentation inhibitors. Attempts to improve the industrial efficacy of fermenters have been in the areas of genetic engineering to improve strain tolerance, but this usually involves detailed and unfeasible mechanistic studies. Statistical designs of experiments have also been used to optimize industrial fermenters but this again often results in local optima due to the relatively small-dimensional space covered by the experiments. Mathematical techniques have recorded great successes and regarding ethanol fermentation with sorghum extracts, previous work has modeled and established the presence of product inhibition, however, did not consider other degrees of freedom (temperature and pH) that minimize the effect of such inhibitions. This paper includes the description of a batch alcohol fermentation process that has been optimized using a technique based on the application of mathematical modeling and optimal control. Calculus of variation is introduced as a valuable tool to derive and solve the necessary conditions for optimality, and the obtained results show the optimal temperature and pH profiles for the fermentation of sorghum extracts. A Simulink model of the fermentation process shows that using the proposed control strategy increases ethanol yield by 14.18%, cell growth by 71.96% decreases the residual substrate by 84.77%. Journal Article 2023 10 18 The use of fermenters at large scale is usually hampered by sub-optimal conditions in terms of yield and productivity, along with the low tolerance of strains to process stresses, such as substrate and product toxicity, and other fermentation inhibitors. Attempts to improve the industrial efficacy of fermenters have been in the areas of genetic engineering to improve strain tolerance, but this usually involves detailed and unfeasible mechanistic studies. Statistical designs of experiments have also been used to optimize industrial fermenters but this again often results in local optima due to the relatively small-dimensional space covered by the experiments. Mathematical techniques have recorded great successes and regarding ethanol fermentation with sorghum extracts, previous work has modeled and established the presence of product inhibition, however, did not consider other degrees of freedom (temperature and pH) that minimize the effect of such inhibitions. This paper includes the description of a batch alcohol fermentation process that has been optimized using a technique based on the application of mathematical modeling and optimal control. Calculus of variation is introduced as a valuable tool to derive and solve the necessary conditions for optimality, and the obtained results show the optimal temperature and pH profiles for the fermentation of sorghum extracts. A Simulink model of the fermentation process shows that using the proposed control strategy increases ethanol yield by 14.18%, cell growth by 71.96% decreases the residual substrate by 84.77%.

OICC PRESS Graphene oxide–Fe2V4O13 hybrid material as highly efficient hetero-Fenton catalyst for degradation of methyl orange Volume 10 (2019) Issue 1, March 2019 2023 10 18 Graphene oxide–Fe2V4O13 hybrid material as highly efficient hetero-Fenton catalyst for degradation of methyl orange https://doi.org/10.1007/s40090-019-0173-8 EN Inbasekaran Muthuvel Advanced Photocatalysis Laboratory, Department of Chemistry, Annamalai University, Annamalainagar, Tamilnadu, 608 002, India 0000-0002-0957-7688 Kaliyamoorthy Gowthami Advanced Photocatalysis Laboratory, Department of Chemistry, Annamalai University, Annamalainagar, Tamilnadu, 608 002, India Ganesamoorthy Thirunarayanan Advanced Photocatalysis Laboratory, Department of Chemistry, Annamalai University, Annamalainagar, Tamilnadu, 608 002, India Palusamy Suppuraj Department of Chemistry, University of Coimbra, 3004-535, Coimbra, Portugal Balu Krishnakumar Department of Chemistry, University of Coimbra, 3004-535, Coimbra, Portugal Abílio José Fraga Do Nascimento Sobral Nanomaterials Laboratory, International Research Centre, Kalasalingam University, Krishnankoil, Tamilnadu, 626 126, India Meenakshisundaram Swaminathan Nanomaterials Laboratory, International Research Centre, Kalasalingam University, Krishnankoil, Tamilnadu, 626 126, India Journal Article 2023 10 18 A new hetero-Fenton type GO/Fe2V4O13 was developed and characterized by FT-IR, XRD, HR-SEM, TEM, and UV-DRS analysis. XRD pattern reveals the presence of monoclinic phase of Fe2V4O13 in the catalyst. TEM images show the particle sizes in the range from 20 to 100 nm and the nice dispersion of nanosized Fe2V4O13 particles on the surface of the graphene oxide. The hetero-Fenton catalyst was used for the degradation of Methyl orange (MO) under UV and solar light. The mineralization rate was influenced by H2O2 concentration, pH, and catalyst loading. The reusability 21% GO/Fe2V4O13 was analyzed. GO/Fe2V4O13 was stable and reusable up to five cycles with 95% degradation. Solar experiments were carried out at different initial solution pH with Fe2V4O13 and 21% GO/Fe2V4O13. Both catalysts show maximum degradation efficiency at pH 6. Mechanism of heterophoto-Fenton process is also proposed. This study reveals that Fe2V4O13 and 21% GO/Fe2V4O13 catalysts are efficient under UV and solar light for the degradation MO and can be utilized for the treatment of dye wastewater.

OICC PRESS Combustion synthesis of porous MgO and its adsorption properties Volume 10 (2019) Issue 1, March 2019 2023 10 18 Combustion synthesis of porous MgO and its adsorption properties https://doi.org/10.1007/s40090-019-0174-7 EN Songnan Li Modern Experiment Center, Harbin Normal University, Harbin, 150025, People’s Republic of China 0000-0002-7136-1781 Journal Article 2023 10 18 Porous magnesium oxide was synthesized by a combustion method, with Mg(NO3)2, ethylene glycol and deionized water as reactants, and characterized by X-ray diffraction, infrared spectroscopy, scanning electron microscopy, transmission electron microscopy and nitrogen sorption/desorption. The results showed that the as-prepared porous magnesium oxide has the multi-scale porous size with a large BET surface area of 203.8 m2 g−1. Magnesium oxides synthesized with other reactants have rod-shaped and granular morphologies, and their BET surface areas are 17.6 and 3.4 m2 g−1, respectively. Compared to the magnesium oxide with the low specific surface area, porous magnesium oxide exhibited higher adsorption efficiency with a maximum adsorption capacity of approximately 1088 mg g−1 in removing Congo red. The as-synthesized porous magnesium oxide could be used as an efficient adsorption material in Congo red removal from the wastewater.