TY - JOUR AU - Hadjadj, Rachid AU - Csizmadia, Imre Gyula AU - Qasim, Hadeer Waleed AU - Aljaberi , Dalal Karad Thbayh AU - Viskolcz, Béla AU - Fiser, Béla TI - Monoethanolamine assisted CO2 hydrogenation to methanol – A computational study JF - MOLECULAR CATALYSIS J2 - MOL CATAL VL - 559 PY - 2024 SN - 2468-8231 DO - 10.1016/j.mcat.2024.114091 UR - https://m2.mtmt.hu/api/publication/34829600 ID - 34829600 LA - English DB - MTMT ER - TY - JOUR AU - Nánai, Lilla AU - Németh, Zoltán AU - Kaptay, György AU - Hernádi, Klára TI - Experimental and theoretical aspects of the growth of vertically aligned CNTs by CCVD on AZO substrate JF - SCIENTIFIC REPORTS J2 - SCI REP VL - 14 PY - 2024 IS - 1 SN - 2045-2322 DO - 10.1038/s41598-024-57862-w UR - https://m2.mtmt.hu/api/publication/34762909 ID - 34762909 AB - An efficient and reproducible growth of vertically aligned carbon nanotubes by CCVD requires accurate and specific setting of the synthesis parameters and the properties of catalyst thin layers. In this work, the growth of vertically aligned carbon nanotubes onto AZO (= aluminum doped zinc oxide) glass substrate covered by Al 2 O 3 and Fe-Co catalyst layer system is presented. Investigation of the effect of catalyst composition and synthesis temperature on CVD growth revealed the optimum condition of the synthesis. The analysis of as-prepared samples by SEM, TEM and Raman spectroscopy was carried out to prove the structure and quality of carbon deposit. Theoretical considerations have supported speculative ideas about the role of the support layer, the transformation of the catalyst layer in the presence of hydrogen gas and the growth mechanism of carbon nanotubes. The mechanism of CNT growth is modelled and the order of magnitude of experimentally observed vertical linear growth rate of CNT (several nm/s) is reproduced. LA - English DB - MTMT ER - TY - JOUR AU - Alktranee, Mohammed AU - Al-Yasiri, Qudama AU - Shehab, Mohammed AU - Bencs, Péter AU - Németh, Zoltán AU - Hernádi, Klára TI - Experimental and numerical study of a photovoltaic/thermal system cooled by metal oxide nanofluids JF - ALEXANDRIA ENGINEERING JOURNAL J2 - ALEX ENG J VL - 94 PY - 2024 SP - 55 EP - 67 PG - 13 SN - 1110-0168 DO - 10.1016/j.aej.2024.03.050 UR - https://m2.mtmt.hu/api/publication/34753277 ID - 34753277 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 - 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 - Younis, Rasheed Taha AU - Adel, Zrelli AU - Nejib, Hajji AU - Qusay, Alsalhy AU - Shehab, Mohammed AU - Németh, Zoltán AU - Hernádi, Klára TI - Optimum content of incorporated nanomaterials: Characterizations and performance of mixed matrix membranes a review JF - DESALINATION AND WATER TREATMENT J2 - DESALIN WATER TREAT VL - 317 PY - 2024 PG - 22 SN - 1944-3994 DO - 10.1016/j.dwt.2024.100088 UR - https://m2.mtmt.hu/api/publication/34656034 ID - 34656034 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 - JOUR AU - Jonathan, Wavomba AU - Mugo, G.W. AU - Varbanov, P.S. AU - Szanyi, Ágnes AU - Mizsey, Péter TI - Exploring Exergy Performance in Tetrahydrofuran/Water and Acetone/Chloroform Separations JF - PROCESSES J2 - PROCESSES VL - 12 PY - 2024 IS - 1 PG - 18 SN - 2227-9717 DO - 10.3390/pr12010014 UR - https://m2.mtmt.hu/api/publication/34568149 ID - 34568149 N1 - Department of Chemical and Environmental Process Engineering, Budapest University of Technology and Economics, Budapest, 1111, Hungary Chemical Engineering Division, Kenya Industrial Research and Development Institute, P.O. Box 30650, Nairobi, 00100, Kenya Sustainable Process Integration Laboratory—SPIL, NETME Centre, FME, Brno University of Technology—VUT Brno, Technická 2896/2, Brno, 616 69, Czech Republic Advanced Materials and Intelligent Technologies Higher Education and Industrial Cooperation Centre, University of Miskolc, Miskolc, 3515, Hungary Export Date: 9 February 2024 Correspondence Address: Mtogo, J.W.; Department of Chemical and Environmental Process Engineering, Hungary; email: jmtogo@edu.bme.hu Correspondence Address: Mizsey, P.; Advanced Materials and Intelligent Technologies Higher Education and Industrial Cooperation Centre, Hungary; email: kemizsey@uni-miskolc.hu Funding details: CZ.02.1.01/0.0/0.0/15 003/0000456 Funding details: European Commission, EC Funding details: Hungarian Scientific Research Fund, OTKA, 128543 Funding details: Tempus Közalapítvány, TPF Funding text 1: This research was funded by the Tempus Public Foundation through the Stipendium Hungaricum program, the Hungarian Scientific Research Funds OTKA 128543, and the LIFE19 CCA/HU/001320–LIFE-CLIMCOOP project supported by the EU LIFE program. The EU Sustainable Process Integration Laboratory–SPIL project, 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. AB - Distillation is significantly influenced by energy costs, prompting a need to explore effective strategies for reducing energy consumption. Among these, heat integration is a key approach, but evaluating its efficiency is paramount. Therefore, this study presents exergy as an energy quality indicator, analyzing irreversibility and efficiencies in tetrahydrofuran/water and acetone/chloroform distillations. Both systems have equimolar feed streams, yielding products with 99.99 mol% purity. The simulations are performed using Aspen Plus™, enabling evaluation at the column level, as a standalone process, or from a lean perspective that considers integration opportunities with other plants. The results show that, despite anticipated energy savings from heat integration, economic viability depends on pressure sensitivity. The results demonstrate that heat-integrated extractive distillation for acetone/chloroform raises utility energy consumption. Exergy calculations comparing standalone and total site integration reveal the variation in distillation efficiency with operation mode. Global exergy efficiency in both extractive and pressure-swing distillation depends on the fate of condenser duty. In heat-integrated extractive distillation, global exergy efficiency drops from 8.7% to 5.7% for tetrahydrofuran/water and 11.5% to 8.3% for acetone/chloroform. Similarly, heat-integrated pressure-swing distillation sees global exergy efficiency decrease from 34.2% to 23.7% for tetrahydrofuran/water and 9.5% to 3.6% for acetone/chloroform, underscoring the nuanced impact of heat integration, urging careful process design consideration. © 2023 by the authors. LA - English DB - MTMT ER - TY - JOUR AU - Alanezi, Adnan Alhathal AU - Abdallah, Heba AU - Shalaby, Marwa S. AU - Aljumaily, Mustafa M. AU - Alsalhy, Qusay F. AU - Shaban, Mohamed AU - Németh, Zoltán AU - Hernádi, Klára TI - Super-antifouling PES nanocomposite membrane encapsulated silica nanoparticles and coated nano-Ag/polyvinyl alcohol layer JF - ALEXANDRIA ENGINEERING JOURNAL J2 - ALEX ENG J VL - 91 PY - 2024 SP - 103 EP - 114 PG - 12 SN - 1110-0168 DO - 10.1016/j.aej.2024.01.079 UR - https://m2.mtmt.hu/api/publication/34566082 ID - 34566082 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 -