R. A. Rodriguez Pineda, A. A. Sadovnikov, E. R. Naranov
{"title":"Tandem Hydroalkylation of Phenol with Acetone over Cu-Based Catalysts","authors":"R. A. Rodriguez Pineda, A. A. Sadovnikov, E. R. Naranov","doi":"10.1134/S1070427226080021","DOIUrl":"10.1134/S1070427226080021","url":null,"abstract":"<p>The possibility of selective production of alkylphenols by two-stage alkylation was studied: hydrogenation of acetone to isopropyl alcohol in the presence of phenol on copper-containing catalysts followed by alkylation using acidic H-MCM-22. The catalytic activity of a series of copper-based catalysts with different supports (SiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>, TiO<sub>2</sub>, ZSM-5, H-ZSM-5, H-BEA, H-MCM-22, TS-1) in the temperature range of 150–200°C and the kinetics of this process were analyzed. It was shown that the highest conversion of acetone with minimal conversion of phenol to cyclohexanol is ensured with 5% Cu/TS-1 and 5% Cu/SiO<sub>2</sub>. The main products of tandem hydroalkylation are <i>o-/p</i>-isopropylphenol, as well as diisopropylphenol.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 8","pages":"417 - 424"},"PeriodicalIF":0.7,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ashwini D. Patil, Uday P. Lad, Rahul S. Patil, Jaysing U. Patil, Ankush V. Mali, Shivaji B. Ubale, Sanjay K. Sharma, Omkar Singh Kushwaha, Tukaram J. Shinde
{"title":"Synthesis of Microstructural Zn Substituted MnAl2O4 by Sol-Gel Auto-Combustion Method and Investigation of Antimicrobial Performance","authors":"Ashwini D. Patil, Uday P. Lad, Rahul S. Patil, Jaysing U. Patil, Ankush V. Mali, Shivaji B. Ubale, Sanjay K. Sharma, Omkar Singh Kushwaha, Tukaram J. Shinde","doi":"10.1134/S1070427225602918","DOIUrl":"10.1134/S1070427225602918","url":null,"abstract":"<p>The sol-gel auto-combustion method is a known wet chemical method applied for the synthesis of composites, especially mixed metal oxides (MMOs). Herein, we report synthesis of Zn substituted MnAl<sub>2</sub>O<sub>4</sub> (ZMA) by sol-gel auto-combustion method. Different compositions of ZMA by varying Zn concentration (0, 25, 50, 75, and 100%) were prepared and structural properties were compared. The as-synthesized materials were characterized by using X-ray powder Diffraction (XRD), field emission–scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDS), Fourier transform–infrared spectroscopy (FT-IR) and Thermal Analysis (TGA/DTA/DSC). Further, the antimicrobial properties of the different compositions of ZMA against both lab isolated gram positive <i>(S. aureus)</i> and gram negative (<i>E. coli, P. aeruginosa, Salmonella spp.</i>) bacteria were tested by the agar well diffusion method. The Zn ion substitution in the lattice of MnAl<sub>2</sub>O<sub>4</sub> is founds to be strategic and effective method to combat bacteria. The study clearly reveals that ZMA (50%) i.e. ZnAl<sub>2</sub>O<sub>4</sub>·MnAl<sub>2</sub>O<sub>4</sub> composition has a strong antibacterial potential.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 8","pages":"461 - 474"},"PeriodicalIF":0.7,"publicationDate":"2026-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kaouther Kerboua, Nour Hane Merabet, Intissar Gasmi
{"title":"Green Hydrogen Production from Water Using PV-Supplied Sono-Electrolysis: A Numerical Modelling Approach of the Effect of Degassing and Mass Transfer","authors":"Kaouther Kerboua, Nour Hane Merabet, Intissar Gasmi","doi":"10.1134/S1070427225602621","DOIUrl":"10.1134/S1070427225602621","url":null,"abstract":"<p>The sono-electrolytic system is complex in terms of heterogeneous fluid flows, particularly due to simultaneous formation and collapse of acoustic cavitation bubbles within an aqueous electrolyte, the evolution of H<sub>2</sub> and O<sub>2</sub> gases on the electrodes, and the overall bubbling phenomenon. The present study presents a numerical design to investigate the effect of sonication on PV-supplied alkaline electrolysis through a parametric modelling and simulation of the variation of the electrolyte resistance and the kinetics of hydrogen production as functions of bubble degassing, the diffusion coefficient and the Faraday efficiency. The model has been validated through a comparative analysis with experiments. Based on the effect of ultrasound on the diffusion coefficient, the analysis demonstrated that the influence of ultrasound cannot be attributed to an enhancement of mass diffusion. If such an effect exists, its extent remains negligible. Furthermore, the effect of ultrasounds cannot be explained by a change in Faraday efficiency. The comparison of experimental and simulation results shows that the Faraday efficiency remains consistently equal to unity regardless of the presence or absence of ultrasounds. In conclusion, sonication role in sono-electrolysis process is rather due to the degassing effect and hence the reduction of electrode bubble coverage, the bubble resistance, and consequently, the overall ohmic resistance.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 7","pages":"377 - 389"},"PeriodicalIF":0.7,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148719153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis of Highly Dispersed Co-MCM-41 by a Novel Two-Step Method and Its Catalytic Performance in Aerobic Epoxidation of Styrene","authors":"Xuefeng Li, Shanshan Li","doi":"10.1134/S1070427224603012","DOIUrl":"10.1134/S1070427224603012","url":null,"abstract":"<p>In the present study, highly dispersed Co-MCM-41 catalysts have been prepared by a novel two-step method consisting of the co-condensation and the template ion exchange. The samples are characterized by ICP–AES, UV-vis, N<sub>2</sub>-adsorption and XRD, respectively, and evaluated by the epoxidation of styrene using molecular oxygen as oxidant. The typical samples have the pore structure and phase characteristics of MCM-41 mesoporous molecular sieve. Introducing methyl or ethyl into MCM-41 can really increase the Co dispersity of the final Co-MCM-41 and accordingly improve its catalytic performance. Higher Co dosages will give rise to higher Co/Si in final catalysts and better catalytic performance to an appropriate extent. Among the catalysts, the sample with a dosage of 0.05 methyl/Si and a dosage of Co/Si of 0.02 performs best in catalytic epoxidation of styrene. The sample results in a highest Yield of styrene oxide of 29.0% and can be used 3 times in the reusing test.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 7","pages":"390 - 397"},"PeriodicalIF":0.7,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148719155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Gang Ji, Chao Jin, Yaxuan Liu, Lin Liu, Chang Guo, Guangchen Zhu
{"title":"Improving Tribological Performance of Phosphate Ceramic Coating Reinforced by Oriented Fe3O4/h-BN Hybrid","authors":"Gang Ji, Chao Jin, Yaxuan Liu, Lin Liu, Chang Guo, Guangchen Zhu","doi":"10.1134/S1070427225603328","DOIUrl":"10.1134/S1070427225603328","url":null,"abstract":"<p>To enhance the tribological property of Ti-6Al-4V alloy, a chemically bonded phosphate ceramic coating (CBPC) reinforced by oriented ferroferric oxide-hexagonal boron nitride (Fe<sub>3</sub>O<sub>4</sub>/h-BN) was fabricated via a weak magnetic field. FTIR, TEM, SEM, and EDS were employed to systematically investigate the structural evolution of Fe<sub>3</sub>O<sub>4</sub>/h-BN hybrids. Furthermore, the wear resistance of CBPC was assessed through tribological tests, supported by microstructure and phase characterization. The results demonstrate that increasing the Fe<sub>3</sub>O<sub>4</sub>/h-BN hybrid content significantly reduces both the friction coefficient and wear rate of CBPC. Additionally, CBPC with aligned h-BN exhibits superior wear resistance compared to coatings containing randomly dispersed h-BN. This enhancement arises from three key mechanisms: Firstly, the magnetic-field-induced alignment of h-BN platelets facilitates efficient stress distribution, reducing localized wear damage. Secondly, the hybrid structure promotes the generation of a protective lubricating film during friction, which reduces shear forces and abrasive wear. Thirdly, within an optimal range, higher h-BN loading promotes coating densification, leading to superior wear resistance. These findings highlight the potential of coating with magnetically aligned structures for developing high-performance, wear-resistant materials in industrial applications.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 7","pages":"363 - 376"},"PeriodicalIF":0.7,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148719117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Optimizing Combustion and Emissions in Diesel Engines Using Castor Oil Biodiesel","authors":"Fethi Bouras, Fouad Khaldi, Abdallah Dogga, Nadjet Gheraissa","doi":"10.1134/S1070427226070037","DOIUrl":"10.1134/S1070427226070037","url":null,"abstract":"<p>This study investigates castor oil biodiesel as a sustainable, second-generation alternative to conventional diesel, focusing on its production, characterization, and engine performance. Biodiesel was synthesized via transesterification, achieving a 64% yield. The extracted biodiesel’s physicochemical properties were validated against ASTM and EN standards, confirming full compliance. Engine tests in an electrical generator evaluated blends (e.g., B5, B15, B25, and B50) under varying loads. Castor biodiesel blends reduced NOx emissions, contrasting the NOx trade-off common to biodiesel, a result tied to their unique fatty acid profile. Simultaneously, the blends improved engine efficiency and reduced specific fuel consumption compared to conventional diesel. These findings underscore castor biodiesel’s viability as a renewable fuel with dual environmental and performance benefits.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 7","pages":"408 - 416"},"PeriodicalIF":0.7,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148719157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Yu. Zaichenko, M. V. Tsvetkov, D. N. Podlesniy, A. V. Sergeev, E. V. Polianczyk
{"title":"Thermodynamic Assessment of the Reduction Conditions of Iron(III) Oxide during Downdraft Gasification of Coal and Low-Grade Ore Mixture","authors":"A. Yu. Zaichenko, M. V. Tsvetkov, D. N. Podlesniy, A. V. Sergeev, E. V. Polianczyk","doi":"10.1134/S10704272266016585","DOIUrl":"10.1134/S10704272266016585","url":null,"abstract":"<p>A thermodynamic analysis of the conditions for Fe<sub>2</sub>O<sub>3</sub> reduction during downdraft gasification of coal and low-grade ore mixture was performed under conditions characteristic of the high-temperature zone of downdraft-type gasifier reactors, using the commercial TERRA code for calculating thermochemical equilibria in the range of 800–1600 K. A complete reduction of iron is impossible with the stoichiometric ratio of reducing gas excess χ < 2. The quantitative reduction of Fe<sub>2</sub>O<sub>3</sub> to metallic iron is achieved at χ ≥ 3 and temperature over 1000 K.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 7","pages":"357 - 362"},"PeriodicalIF":0.7,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148719156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Valentina Grudkovskaya, Maxim Shalygin, Pavel Tokarev, Svetlana Markova, Evgenia Grushevenko
{"title":"Membrane Recuperation Volatile Organic Compounds: Modeling of n-Octane Vapor Recovery by Polydecylmethylsiloxane","authors":"Valentina Grudkovskaya, Maxim Shalygin, Pavel Tokarev, Svetlana Markova, Evgenia Grushevenko","doi":"10.1134/S1070427226070025","DOIUrl":"10.1134/S1070427226070025","url":null,"abstract":"<p>Comparative analysis of membrane materials was provided for the recovery of volatile organic compounds (VOCs) from vapor-gas mixtures generated during petroleum product loading operations. Mathematical modeling of membrane separation in a countercurrent mode was used to evaluate the effectiveness of two different membranes: polydecylmethylsiloxane (C10) and polydimethylsiloxane (PDMS), for recovery <i>n-</i>octane vapors, a model component limiting mass transfer during gasoline fraction recovery. Calculations were performed for a rail tank car loading and unloading process with a capacity of 830 m<sup>3</sup>/h and a target VOC recovery rate of 90%. It was found that the high selectivity of C10 with respect to <i>n-</i>octane vapor provides significant technological advantages, such as an increase in the concentration of <i>n-</i>octane in the permeate stream and a decrease in specific energy consumption. With a decrease in permeate pressure from 10 to 2 kPa, the required area of C10 membranes is shown to decrease by 6 times and for PDMS membranes by only 2.7 times. The costs of the membranes and energy consumption for VOC recovery from one railway tank car were estimated. The results obtained support the potential of using highly selective C10 membranes to create energy-efficient VOC recovery units for oil refining.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 7","pages":"398 - 407"},"PeriodicalIF":0.7,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148719154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ag-Containing Catalysts Based on CeO2–Fe2O3@SBA-15 for CO Oxidation","authors":"N. N. Mikheeva, G. V. Mamontov","doi":"10.1134/S1070427226060030","DOIUrl":"10.1134/S1070427226060030","url":null,"abstract":"<p>A series of Ag-containing catalysts for CO oxidation based on CeO<sub>2</sub>–Fe<sub>2</sub>O<sub>3</sub>@SBA-15 composites synthesized by salt encapsulation in the hybrid material Pluronic-P123@SBA-15 was obtained. The effect of a block copolymer of polyethylene glycol and polypropylene glycol Pluronic-P123 inside the SBA-15 structure (ordered mesoporous silicon dioxide) on the distribution and dispersion of the deposited CeO<sub>2</sub> and Fe<sub>2</sub>O<sub>3</sub> components is shown. The deposition of cerium and iron oxides on Pluronic@SBA-15 makes it possible to stabilize CeO<sub>2</sub> and Fe<sub>2</sub>O<sub>3</sub> in the form of highly dispersed particles evenly distributed on the surface of the carrier. It was shown that the use of CeO<sub>2</sub> and Fe<sub>2</sub>O<sub>3</sub> stabilized in the SBA-15 structure makes it possible to increase the activity of Ag-containing catalysts in the CO oxidation reaction compared with the Ag/SBA-15 catalyst.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 6","pages":"349 - 355"},"PeriodicalIF":0.7,"publicationDate":"2026-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148314740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Sumina, S. Selishcheva, V. Sosnina, V. Yakovlev
{"title":"Erratum to: Copper-Chromium Catalyst for the Hydrogenation of Furfural to Furfuryl Alcohol in Various Modes","authors":"A. Sumina, S. Selishcheva, V. Sosnina, V. Yakovlev","doi":"10.1134/S1070427226060042","DOIUrl":"10.1134/S1070427226060042","url":null,"abstract":"","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"99 6","pages":"356 - 356"},"PeriodicalIF":0.7,"publicationDate":"2026-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148314742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}