TY - CONF AU - Konyhás, Vivien AU - Polyákné Kovács, Annamária TI - Optimization of Continuous Soft Polyurethane Foam Production Considering Sustainability Parameters T2 - Abstract Book of 4th International Artificial Intelligence and Data Science Congress ICADA 2024 SN - 9786256530904 PY - 2024 SP - 41 EP - 41 PG - 1 UR - https://m2.mtmt.hu/api/publication/34764698 ID - 34764698 LA - English DB - MTMT ER - TY - JOUR AU - Tóth Ugyonka, Helga AU - Hantal, György AU - Szőri, Milán AU - Jedlovszky, Pál TI - Computer Simulation Insights into the Chemical Origins of Life: Can HCN Enrichment on Interstellar Amorphous Ice Be a Starting Point? JF - ACS EARTH AND SPACE CHEMISTRY J2 - ACS EARTH SPACE CHEM VL - 8 PY - 2024 IS - 3 SP - 520 EP - 532 PG - 13 SN - 2472-3452 DO - 10.1021/acsearthspacechem.3c00299 UR - https://m2.mtmt.hu/api/publication/34743348 ID - 34743348 N1 - Export Date: 27 March 2024 Correspondence Address: Szőri, M.; Institute of Chemistry, Egyetemváros A/2, Hungary; email: milan.szori@uni-miskolc.hu Correspondence Address: Jedlovszky, P.; Department of Chemistry, Leányka utca 12, Hungary; email: jedlovszky.pal@uni-eszterhazy.hu LA - English DB - MTMT ER - TY - JOUR AU - Reizer, Edina AU - Tokaji, György Marcell AU - Palusiak, Marcin AU - Viskolcz, Béla AU - Fiser, Béla TI - The first step of polycyclic aromatic hydrocarbon growth – A case study of hydrogen abstractions by •H, •OH, and •CH3 radical JF - COMPUTATIONAL AND THEORETICAL CHEMISTRY J2 - COMPUT THEOR CHEM VL - 1234 PY - 2024 PG - 7 SN - 2210-271X DO - 10.1016/j.comptc.2024.114530 UR - https://m2.mtmt.hu/api/publication/34717280 ID - 34717280 LA - English DB - MTMT ER - TY - JOUR AU - Dobó, Máté AU - Dombi, Gergely AU - Köteles, István AU - Fiser, Béla AU - Kis, Csenge AU - Szabó, Zoltán-István AU - Tóth, Gergő TI - Simultaneous Determination of Enantiomeric Purity and Organic Impurities of Dexketoprofen Using Reversed-Phase Liquid Chromatography—Enhancing Enantioselectivity through Hysteretic Behavior and Temperature-Dependent Enantiomer Elution Order Reversal on Polysaccharide Chiral Stationary Phases JF - INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES J2 - INT J MOL SCI VL - 25 PY - 2024 IS - 5 PG - 15 SN - 1661-6596 DO - 10.3390/ijms25052697 UR - https://m2.mtmt.hu/api/publication/34688029 ID - 34688029 N1 - Export Date: 12 April 2024 Correspondence Address: Tóth, G.; Department of Pharmaceutical Chemistry, Hogyes 9, Hungary; email: toth.gergo@semmelweis.hu AB - A reversed-phase high-performance liquid chromatographic (HPLC) method was developed for the simultaneous determination of the potential impurities of dexketoprofen, including the distomer R-ketoprofen. After screening the separation capability of four polysaccharide columns (Lux Amylose-1, Lux Amylose-2, Lux Cellulose-1 and Lux Cellulose-2) in polar organic and in reversed-phase modes, appropriate enantioseparation was observed only on the Lux Amylose-2 column in an acidified acetonitrile/water mixture. A detailed investigation of the mobile phase composition and temperature for enantio- and chemoselectivity showed many unexpected observations. It was observed that both the resolution and the enantiomer elution order can be fine-tuned by varying the temperature and mobile phase composition. Moreover, hysteresis of the retention times and enantioselectivity was also observed in reversed-phase mode using methanol/water mixtures on amylose-type columns. This could indicate that the three-dimensional structure of the amylose column can change by transitioning from a polar organic to a reversed-phase mode, which affects the enantioseparation process. Temperature-dependent enantiomer elution order and rare enthalpic/entropic controlled enantioseparation in the operative temperature range were also observed in reversed-phase mode. To find the best methodological conditions for the determination of dexketoprofen impurities, a full factorial optimization design was performed. Using the optimized parameters (Lux Amylose-2 column with water/acetonitrile/acetic acid 50/50/0.1 (v/v/v) at a 1 mL/min flow rate at 20 °C), baseline separations were achieved between all compounds within 15 min. Our newly developed HPLC method was validated according to the current guidelines, and its application was tested on commercially available pharmaceutical formulations. According to the authors’ knowledge, this is the first study to report hysteretic behavior on polysaccharide columns in reversed-phase mode. LA - English DB - MTMT ER - TY - JOUR AU - Hatvani-Nagy, Alpár Ferencz AU - Hajdu, Viktória AU - Ilosvai, Mária Ágnes AU - Muránszky, Gábor AU - Sikora, Emőke AU - Kristály, Ferenc AU - Daróczi, Lajos AU - Viskolcz, Béla AU - Fiser, Béla AU - Vanyorek, László TI - Bentonite as eco-friendly natural mineral support for Pd/CoFe2O4 catalyst applied in toluene diamine synthesis JF - SCIENTIFIC REPORTS J2 - SCI REP VL - 14 PY - 2024 IS - 1 PG - 9 SN - 2045-2322 DO - 10.1038/s41598-024-54792-5 UR - https://m2.mtmt.hu/api/publication/34656926 ID - 34656926 AB - Toluene diamine (TDA) is a major raw material in the polyurethane industry and thus, its production is highly important. TDA is obtained through the catalytic hydrogenation of 2,4-dinitrotoluene (2,4-DNT). In this study a special hydrogenation catalyst has been developed by decomposition cobalt ferrite nanoparticles onto a natural clay-oxide nanocomposite (bentonite) surface using a microwave-assisted solvothermal method. The catalyst particles were examined by TEM and X-ray diffraction. The palladium immobilized on the bentonite crystal surface was identified using an XRD and HRTEM device. The obtained catalyst possesses the advantageous property of being easily separable due to its magnetizability on a natural mineral support largely available and obtained through low carbon- and energy footprint methods. The catalyst demonstrated outstanding performance with a 2,4-DNT conversion rate exceeding 99% along with high yields and selectivity towards 2,4-TDA and all of this achieved within a short reaction time. Furthermore, the developed catalyst exhibited excellent stability, attributed to the strong interaction between the catalytically active metal and its support. Even after four cycles of reuse, the catalytic activity remained unaffected and the Pd content of the catalyst did not change, which indicates that the palladium component remained firmly attached to the magnetic support's surface. LA - English DB - MTMT ER - TY - JOUR AU - Qasim, Hadeer Waleed AU - Hadjadj, Rachid AU - Viskolcz, Béla AU - Fiser, Béla TI - Stoichiometric reaction and catalytic effect of 2-dimethylaminoethanol in urethane formation JF - PHYSICAL CHEMISTRY CHEMICAL PHYSICS J2 - PHYS CHEM CHEM PHYS VL - 26 PY - 2024 IS - 8 SP - 7103 EP - 7108 PG - 6 SN - 1463-9076 DO - 10.1039/D3CP05800J UR - https://m2.mtmt.hu/api/publication/34576072 ID - 34576072 AB - A computational study of the stoichiometric reaction and catalytic effect of 2-dimethylaminoethanol (DMEA) in urethane formation was performed. LA - English DB - MTMT ER - TY - THES AU - Al-Mandalawi, Mohammed TI - Development of Polyurethane-based Nanocomposites to be Applied as Flexible Pressure Sensors PY - 2024 SP - 96 UR - https://m2.mtmt.hu/api/publication/34548174 ID - 34548174 LA - English DB - MTMT ER - TY - JOUR AU - Talei, Saeed AU - Fozer, D. AU - Varbanov, P.S. AU - Szanyi, Ágnes AU - Mizsey, Péter TI - Oxyfuel Combustion Makes Carbon Capture More Efficient JF - ACS OMEGA J2 - ACS OMEGA VL - 9 PY - 2024 IS - 3 SP - 3250 EP - 3261 PG - 12 SN - 2470-1343 DO - 10.1021/acsomega.3c05034 UR - https://m2.mtmt.hu/api/publication/34533660 ID - 34533660 N1 - Export Date: 26 January 2024 Correspondence Address: Szanyi, A.; Institute of Chemistry, Hungary; email: szanyi.agnes@vbk.bme.hu Funding details: European Commission, EC, CZ.02.1.01/0.0/0.0/15 003/0000456 Funding details: Hungarian Scientific Research Fund, OTKA, 128543 Funding text 1: The authors appreciate the financial support of the Stipendium Hungaricum program, the Hungarian Scientific Research Funds OTKA 128543, and the LIFE19 CCA/HU/001320–LIFE-CLIMCOOP project supported by EU LIFE program. The EU project Sustainable Process Integration Laboratory─SPIL, funded as project no. CZ.02.1.01/0.0/0.0/15 003/0000456, by Czech Republic Operational Programme Research and Development, Education is also gratefully acknowledged. The precious contribution of Prof. Dr. Jiri Klemes is highly acknowledged and appreciated. AB - Fossil energy carriers cannot be totally replaced, especially if nuclear power stations are stopped and renewable energy is not available. To fulfill emission regulations, however, points such as emission sources should be addressed. Besides desulfurization, carbon capture and utilization have become increasingly important engineering activities. Oxyfuel technologies offer new options to reduce greenhouse gas emissions; however, the use of clean oxygen instead of air can be dangerous in the case of certain existing technologies. To replace the inert effect of nitrogen, carbon dioxide is mixed with oxygen gas in the case of such air combustion processes. In this work, the features of carbon capture in five different flue gases of air combustion and such oxyfuel combustion where additional carbon dioxide is mixed with clean oxygen are studied and compared. The five different flue gases originate from the gas-fired power plant, coal-fired power plant, coal-fired combined heat and power plant, the aluminum production industry, and the cement manufacturing industry. Monoethanolamine, which is an industrially preferred solvent for carbon dioxide capture from gas streams at low pressures, is selected as an absorbent, and the same amount of carbon dioxide is captured; that is, always that amount of carbon dioxide is captured, which is the result of the fossil combustion process. ASPEN Plus is used for mathematical modeling. The results show that the oxyfuel combustion cases need significantly less energy, especially at high carbon dioxide removal rates, e.g., higher than 90%, than that of the air combustion cases. The savings can even be as high as 84%. Moreover, 100% carbon capture was also be completed. This finding can be due to the fact that in the oxyfuel combustion cases, the carbon dioxide concentration is much higher than that of the air combustion cases because of the inert carbon dioxide and that higher carbon dioxide concentration results in a higher driving force for the mass transfer. The oxyfuel combustion processes also show another advantage over the air combustion processes since no nitrogen oxides are produced in the combustion process. © 2024 The Authors. Published by American Chemical Society. LA - English DB - MTMT ER - TY - THES AU - Sikora, Emőke TI - Katalizátor fejlesztése klorátionok katalitikus hidrogénezéséhez PY - 2024 SP - 114 DO - 10.14750/ME.2024.010 UR - https://m2.mtmt.hu/api/publication/34483901 ID - 34483901 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Raja, Rana I. AU - Rashid, Khalid T. AU - Toma, M.A. AU - AbdulRazak, Adnan A. AU - Shehab, Mohammed AU - Hernádi, Klára TI - A Novel Polyethersulfone/Chamomile (PES/Chm) Mixed Matrix Membranes for Wastewater Treatment Applications JF - JOURNAL OF SAUDI CHEMICAL SOCIETY J2 - J SAUDI CHEM SOC VL - 28 PY - 2024 IS - 2 PG - 16 SN - 1319-6103 DO - 10.1016/j.jscs.2023.101805 UR - https://m2.mtmt.hu/api/publication/34479241 ID - 34479241 LA - English DB - MTMT ER -