OICC PRESS Quantification of inherent energy resilience of process systems pertaining to a gas sweetening unit Volume 11 (2020), IJIC Issue 2, June 2020 2023 10 06 Quantification of inherent energy resilience of process systems pertaining to a gas sweetening unit https://doi.org/10.1007/s40090-020-00203-3 EN Sirshendu Guha Process Design and Development Division, Engineers India Limited, 1 Bhikaji Cama Place, New Delhi, 110066, India Journal Article 2023 10 06 In contrast to physical failure of process systems, quantification of inherent system energy resilience has been carried out considering performance failure of process systems under this work. The inherent energy resilience for process systems can be conceptualized from the perspectives of material resilience (Guha, Environ Prog Sustain Energy, e13308, 2019). Correlations have been used to assess inherent energy resilience properties of constituent process systems pertaining to a gas sweetening unit (GSU) as a case study [1]. A steady state condition has been considered and system stress and system strain equations have been used to quantify the inherent system energy resilience [1]. It is assessed that absorber column and regenerator column systems under study possess inherent energy resilience of around 5% (absorber column) and 15% (regenerator column) with regard to variation in upstream feed sour gas flow rate beyond 100% design flow rate, i.e., 27,814 kg/h. It is also established that the lean-rich exchanger system under study possesses inherent energy resilience of around 10% with regard to variation in upstream feed sour gas flow rate beyond 100% design flow rate. Results also indicate that similar to a material, all the process systems under study (i.e., absorber, regenerator, lean-rich exchanger) of a gas sweetening unit (GSU) demonstrate inverse relationship of modulus of energy resilience (Ur) with modulus of elasticity (Esys) in all applicable operating variable deviation regimes. Computer simulation using a process simulator SIMULATION SCIENCES INC, Pro/II (Version 9.2) has been utilized for this study. Finally, one example is given regarding design procedure in relation to incorporation of 50% over capacity factor or inherent energy resiliency in the absorber column by augmentation of number of column trays.

OICC PRESS Poly(butyl acrylate) gel prepared in supercritical CO2: an efficient recyclable oil-absorbent Volume 11 (2020), IJIC Issue 2, June 2020 2023 10 06 Poly(butyl acrylate) gel prepared in supercritical CO2: an efficient recyclable oil-absorbent https://doi.org/10.1007/s40090-020-00204-2 EN Xiujuan Wu Xinjiang Institute of Product Quality Supervision and Inspection, Ürümqi, 830011, People’s Republic of China Jing Li Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region, Xinjiang University, Ürümqi, 830046, People’s Republic of China Jide Wang Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region, Xinjiang University, Ürümqi, 830046, People’s Republic of China Liqin Cao Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education and Xinjiang Uyghur Autonomous Region, Xinjiang University, Ürümqi, 830046, People’s Republic of China 0000-0003-1551-5982 Journal Article 2023 10 06 Oil-absorbing resins containing cross-linked poly(butyl acrylate) (PBA) were synthesized via precipitation polymerization in an environment-friendly route using supercritical carbon dioxide as the reaction media. The PBA resins were then regenerated through subcritical CO2 extraction process. The PBA resins with macroporous structures, prepared at pressures ranging from 17.5 to 24.5 MPa, were characterized by field emission scanning electron microscopy and mercury porosimetry. These structures are beneficial to oil absorption. Thermogravimetric analysis results showed that the PBA resin has good thermal stability. The effect of reaction pressure, initiator ratio, cross-linker content, and absorption time on yield and oil absorption was also investigated. The results revealed a slight decrease in yield with increasing pressure, within a pressure range of 17.5–24.5 MPa. The high initiator concentrations did lead to the decrease in the oil absorption capacity of the PBA resin. A higher product yield of 55% is acquired in the presence of the higher cross-linker content of 20 wt%. The highest absorption capacity of diesel oil onto the PBA resin was 7.5 g/g with oil retention capacity of 95.2%. Moreover, oil desorption of oil-saturated PBA resin was conducted with carbon dioxide instead of the traditional extraction solvents. After 10 repetitions, PBA resin exhibited good recyclability.

OICC PRESS Design and cost analysis of batch adsorber systems for removal of dyes from contaminated groundwater using natural low-cost adsorbents Volume 11 (2020), IJIC Issue 2, June 2020 2023 10 06 Design and cost analysis of batch adsorber systems for removal of dyes from contaminated groundwater using natural low-cost adsorbents https://doi.org/10.1007/s40090-020-00205-1 EN Elham Khalilzadeh Shirazi Institute for Sanitary Engineering, Water Quality and Solid Waste Management, University of Stuttgart, Bandtäle 2, 70569, Stuttgart, Germany Jörg W. Metzger Institute for Sanitary Engineering, Water Quality and Solid Waste Management, University of Stuttgart, Bandtäle 2, 70569, Stuttgart, Germany Klaus Fischer Institute for Sanitary Engineering, Water Quality and Solid Waste Management, University of Stuttgart, Bandtäle 2, 70569, Stuttgart, Germany Amir Hessam Hassani Faculty of Natural Sciences and Environment, Department of Environmental Engineering, Tehran Science and Research Branch, Islamic Azad University, Tehran, Iran Journal Article 2023 10 06 Batch adsorbers were designed for the adsorption of the fabric dyes Basic Violet 16 (BV16) and Reactive Red 195 (RR195) on locally available low-cost natural adsorbents of Persian bentonite, vermicompost and Persian charred dolomite. The adsorption isotherm data were in agreement with the Langmuir isotherm model (R2 > 99%). Results showed that with increasing the adsorption capacity of bentonite for BV16 from 434.78 to 833.33 mg/g due to the presence of the anionic dye, the amount of the adsorbent decreases by 50%. The adsorption capacity of vermicompost for the cationic dye was obtained 16 mg/g in single dye solution and of charred dolomite for the anionic dye was almost 7 mg/g in both dye systems. Based on the extended Langmuir model, the maximum adsorption capacity of natural bentonite for BV16 and of charred dolomite for RR195 were concluded 821.63 mg/g and 7.03 mg/g, respectively, which the capacities are almost the same in single and binary systems. The adsorption capacity and removal efficiency of Persian bentonite from contaminated water are comparable with that of activated carbon. Compared to activated carbon bentonite and the other natural adsorbents used in this study are less expensive and do not require a separate activation or pre-treatment step. Cost for 90% removal of dye from 100 m3 groundwater using 1 kg the studied adsorbents of vermicompost, charred dolomite and bentonite was calculated 0.06, 0.05 and 0.04 euro, respectively, in both single and binary systems.

OICC PRESS Relationship between silicon, phosphorus content and grain number in mild steels and its corrosion resistance in pickling hydrochloric acid Volume 11 (2020), IJIC Issue 2, June 2020 2023 10 06 Relationship between silicon, phosphorus content and grain number in mild steels and its corrosion resistance in pickling hydrochloric acid https://doi.org/10.1007/s40090-020-00206-0 EN Y. El Kacimi Laboratory of Materials Engineering and Environment: Application and Modeling, Faculty of Science, Ibn Tofail University, PO Box 133, 14000, Kenitra, Morocco 0000-0002-8662-4644 R. Touir Faculty of Science, Department of Chemistry, Cumhuriyet University, 58140, Sivas, Turkey M. Galai Laboratory of Materials Engineering and Environment: Application and Modeling, Faculty of Science, Ibn Tofail University, PO Box 133, 14000, Kenitra, Morocco K. Alaoui Laboratory of Materials Engineering and Environment: Application and Modeling, Faculty of Science, Ibn Tofail University, PO Box 133, 14000, Kenitra, Morocco N. Dkhireche Laboratoire d’Ingénierie des Matériaux et d’Environnement: Modélisation et Application, Faculté des sciences, Université Ibn Tofail, BP. 133, 14000, Kenitra, Morocco M. Ebn Touhami Laboratoire d’Ingénierie des Matériaux et d’Environnement: Modélisation et Application, Faculté des sciences, Université Ibn Tofail, BP. 133, 14000, Kenitra, Morocco Journal Article 2023 10 06 The micro-structural effects on the corrosion resistance of three classes of mild steels (A, B and C) suitable for galvanizing industry, according to their silicon, phosphorus content, grain number and size of carbides (Fe3C) in concentrated hydrochloride acid solution was investigated by a series of known techniques, such as potentiodynamic polarization curves, electrochemical impedance spectroscopy measurements, optical microscope and scanning electron microscopy. Results showed that the corrosion rate of the three classes of mild steel depends on their silicon and silicon/phosphorus combinations contents. It is found also that the corrosion rate depends on grain number and size of carbide content in mild steels. These findings were confirmed by micro-structural characterization and scanning electron microscopy techniques. They indicated that the severe corrosion cavities formed on the carbon steel surfaces and their sizes depended to silicon and silicon/phosphorus combinations contents. These results explained by micro-galvanic corrosion process between cementites and ferrites which became more serious with silicon and silicon/phosphorus combinations contents.

OICC PRESS Eucalyptus leaf extract as a eco-friendly corrosion inhibitor for mild steel in sulfuric and phosphoric acid solutions Volume 11 (2020), IJIC Issue 2, June 2020 2023 10 06 Eucalyptus leaf extract as a eco-friendly corrosion inhibitor for mild steel in sulfuric and phosphoric acid solutions https://doi.org/10.1007/s40090-020-00207-z EN A. M. Abdel-Gaber Department of Chemistry, Faculty of Science, Alexandria University, Ibrahimia, P.O. Box 426, Alexandria, 21321, Egypt Department of Chemistry, Faculty of Science, Beirut Arab University, Beirut, Lebanon H. T. Rahal Department of Chemistry, Faculty of Science, Beirut Arab University, Beirut, Lebanon F. T. Beqai Department of Chemistry, Faculty of Science, Beirut Arab University, Beirut, Lebanon Journal Article 2023 10 06 The adsorption mechanism and inhibitive action of the Eucalyptus plant leaf extract (Eu) on the corrosion of mild steel in 0.5 M H2SO4 and 0.5 M H3PO4 solutions were investigated by potentiodynamic polarization curves measurements and electrochemical impedance spectroscopy technique. Potentiodynamic polarization curves revealed that the Eucalyptus leaf extract acts as a mixed type inhibitor in both acidic solutions. The impedance responses indicated that the corrosion process occurs under activation control. Fourier transform infrared spectroscopy has been used to predict the possible major chemical constituent of the leaf extract. Four adsorption isotherms including Langmuir, kinetic–thermodynamic, Flory–Huggins and Temkin model were used to investigate the mode of inhibition of Eucalyptus leaf extract. The free energy of adsorption showed that the corrosion inhibition takes place by spontaneous physical adsorption of Eucalyptus leaf extract molecules on the mild steel surface. The obtained data indicated that Eucalyptus leaf extract is a more efficient inhibitor of mild steel corrosion in 0.5 M H2SO4 than in 0.5 M H3PO4 solutions. Thermodynamics activation parameters were also calculated and discussed.

OICC PRESS The study on multifunctional aminoalkylenephosphonate-based antiscalant for industrial water systems under harsh conditions Volume 11 (2020), IJIC Issue 2, June 2020 2023 10 06 The study on multifunctional aminoalkylenephosphonate-based antiscalant for industrial water systems under harsh conditions https://doi.org/10.1007/s40090-020-00208-y EN Musa Mpelwa Chemistry Department, Nyankumbu Secondary School, Geita, P.O. Box 140, Mwanza, Tanzania School of Petroleum Engineering, Yangtze University, Wuhan, 430100, China 0000-0003-0762-285X Shanfa Tang Hubei Cooperative Innovation Center of Unconventional Oil and Gas, Yangtze University, Wuhan, 430100, China School of Petroleum Engineering, Yangtze University, Wuhan, 430100, China 0000-0001-7240-7561 Lijun Jin School of Petroleum Engineering, Yangtze University, Wuhan, 430100, China Journal Article 2023 10 06 Mineral scale deposit is one of the major problems incessantly faced in the oil and gas producing wells and surface facilities, and if not well-handled can cause an unsuccessful petroleum production. To eradicate scale deposits, scale inhibitors (SIs) are commonly deployed into industrial water systems. Because of effectiveness and long squeeze lifetimes, organic phosphonate SIs are extensively used for preventing mineral scale formation in industrial water systems. However, they usually exhibit lower Ca2+ and Mg2+ tolerances that restrict their applications in harsh conditions where high inhibitory dosages are needed. In this paper, a multifunctional aminoalkylenephosphonate-based antiscalant having higher Ca2+ and Mg2+ tolerances is studied. The antiscalant was synthesized, characterized (FTIR and NMR spectroscopies), and evaluated in accordance with the NACE Standard Method (TM0374) for preventing CaSO4 and CaCO3 formation in the petroleum industry. The effects of inhibitory dosages, water hardness, temperature, incubation period, and pH were studied. We further tested the performance of the antiscalant in simulated field waters. Experimental results show that the multifunctional aminoalkylenephosphonate-based antiscalant has better inhibitory properties as compared to conventional aminoalkylenephosphonate-based SIs. The incorporation of the sulfonate group into the molecule significantly improved the solubility of the antiscalant and hence its tolerances to Ca2+ and Mg2+ ions. Also, it bolstered thermal stability of the inhibitor. The results from simulated field conditions are promising. The synthesized antiscalant performed superbly than the conventionally aminomethylenephosphonate antiscalants where Ca2+ and Mg2+ concentrations are challenging.