@article{MTMT:34824897, title = {Investigation of gasoline-like transportation fuel obtained by plastic waste pyrolysis and distillation}, url = {https://m2.mtmt.hu/api/publication/34824897}, author = {Hegedüs, Balázs and Palotás, Árpád Bence and Muránszky, Gábor and Dobó, Zsolt}, doi = {10.1016/j.jclepro.2024.141500}, journal-iso = {J CLEAN PROD}, journal = {JOURNAL OF CLEANER PRODUCTION}, volume = {447}, unique-id = {34824897}, issn = {0959-6526}, year = {2024}, eissn = {1879-1786} } @article{MTMT:34656926, title = {Bentonite as eco-friendly natural mineral support for Pd/CoFe2O4 catalyst applied in toluene diamine synthesis}, url = {https://m2.mtmt.hu/api/publication/34656926}, author = {Hatvani-Nagy, Alpár Ferencz and Hajdu, Viktória and Ilosvai, Mária Ágnes and Muránszky, Gábor and Sikora, Emőke and Kristály, Ferenc and Daróczi, Lajos and Viskolcz, Béla and Fiser, Béla and Vanyorek, László}, doi = {10.1038/s41598-024-54792-5}, journal-iso = {SCI REP}, journal = {SCIENTIFIC REPORTS}, volume = {14}, unique-id = {34656926}, issn = {2045-2322}, abstract = {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.}, keywords = {HYDROGENATION; Ferrite; Magnetic; 2,4-DNT}, year = {2024}, eissn = {2045-2322}, orcid-numbers = {Kristály, Ferenc/0000-0002-0075-5994; Fiser, Béla/0000-0003-0603-4626} } @CONFERENCE{MTMT:34547737, title = {Stroncium meghatározása biológiai mintákban ICP-AES spektrometriával}, url = {https://m2.mtmt.hu/api/publication/34547737}, author = {Gráczer, Kitti and Muránszky, Gábor and Bánhidi, Olivér and Viskolcz, Béla}, booktitle = {PhD hallgatók anyagtudományi napja XXIII}, unique-id = {34547737}, year = {2023}, pages = {2-2} } @{MTMT:34443222, title = {Low Emission Additives in Polyurethane Flexible Foams}, url = {https://m2.mtmt.hu/api/publication/34443222}, author = {Hornyák-Mester, Enikő and Muránszky, Gábor and Viskolcz, Béla}, booktitle = {Symposium on Polyurethane Innovation 2023 - Conference Booklet}, unique-id = {34443222}, year = {2023}, pages = {7} } @inproceedings{MTMT:34442305, title = {Az Izocianát - Oldószer Kölcsönhatások Számítógépes és Kísérleti Vizsgálata}, url = {https://m2.mtmt.hu/api/publication/34442305}, author = {Hornyák-Mester, Enikő and Muránszky, Gábor and Fiser, Béla and Viskolcz, Béla}, booktitle = {Symposium on Polyurethane Innovation 2023 - Conference Booklet}, unique-id = {34442305}, year = {2023}, pages = {129-139}, orcid-numbers = {Fiser, Béla/0000-0003-0603-4626} } @article{MTMT:34442256, title = {A VDA 278 szabvány szerinti VOC vizsgálatok nehézségei poliuretán rugalmas hab példáján keresztül bemutatva}, url = {https://m2.mtmt.hu/api/publication/34442256}, author = {Hornyák-Mester, Enikő and Mentes, Dóra and Sőrés-Tölli, Lilla Márta and Varga, Miklós and Muránszky, Gábor and Viskolcz, Béla}, journal-iso = {Doktorandusz Almanach}, journal = {Doktorandusz Almanach}, volume = {2023}, unique-id = {34442256}, issn = {2939-7294}, year = {2023}, pages = {83-90} } @article{MTMT:34441840, title = {Development of Magnetizable, Nickel–Ferrite-Decorated Carbon Nanocomposites as Hydrogenation Catalyst for Aniline Synthesis}, url = {https://m2.mtmt.hu/api/publication/34441840}, author = {Prekob, Ádám and Szegedi, Máté Péter and Muránszky, Gábor and Kristály, Ferenc and Nagy, Miklós and Halasi, Gyula and Szamosvölgyi, Ákos and Fiser, Béla and Viskolcz, Béla and Vanyorek, László}, doi = {10.3390/ijms242417547}, journal-iso = {INT J MOL SCI}, journal = {INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES}, volume = {24}, unique-id = {34441840}, issn = {1661-6596}, abstract = {Catalysts with magnetic properties can be easily recovered from the reaction medium without loss by using a magnetic field, which highly improves their applicability. To design such systems, we have successfully combined the magnetic properties of nickel ferrite nanoparticles with the positive properties of carbon-based catalyst supports. Amine-functionalized NiFe2O4 nanoparticles were deposited on the surfaces of nitrogen-doped bamboo-like carbon nanotubes (N-BCNT) and carbon nanolayers (CNL) by using a coprecipitation process. The magnetizable catalyst supports were decorated by Pd nanoparticles, and their catalytic activity was tested through the hydrogenation of nitrobenzene (NB). By using the prepared catalysts, high nitrobenzene conversion (100% for 120 min at 333 K) and a high aniline yield (99%) were achieved. The Pd/NiFe2O4-CNL catalyst was remarkable in terms of stability during the reuse tests due to the strong interaction formed between the catalytically active metal and its support (the activity was retained during four cycles of 120 min at 333 K). Furthermore, despite the long-lasting mechanical stress, no significant palladium loss (only 0.08 wt%) was detected.}, year = {2023}, eissn = {1422-0067}, orcid-numbers = {Kristály, Ferenc/0000-0002-0075-5994; Nagy, Miklós/0000-0002-3484-2244; Halasi, Gyula/0000-0003-0195-9400; Fiser, Béla/0000-0003-0603-4626} } @article{MTMT:34117847, title = {Amine Functionalization Leads to Enhanced Performance for Nickel- and Cobalt-Ferrite-Supported Palladium Catalysts in Nitrobenzene Hydrogenation}, url = {https://m2.mtmt.hu/api/publication/34117847}, author = {Hajdu, Viktória and Prekob, Ádám and Muránszky, Gábor and Kristály, Ferenc and Daróczi, Lajos and Harasztosi, Lajos and Kaleta, Zoltán and Viskolcz, Béla and Nagy, Miklós and Vanyorek, László}, doi = {10.3390/ijms241713347}, journal-iso = {INT J MOL SCI}, journal = {INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES}, volume = {24}, unique-id = {34117847}, issn = {1661-6596}, abstract = {Easy preparation, good yield and easy recovery are the key challenges in the development of industrial catalysts. To meet all these three criteria, we have prepared intelligent, magnetizable NiFe2O4- and CoFe2O4-supported palladium catalysts that can be easily and completely recovered from the reaction medium by magnetic separation. The fast and facile preparation was achieved by a solvothermal method followed by sonochemical-assisted decomposition of the palladium nanoparticles onto the surface of the magnetic nanoparticles. The metal–support interaction was enhanced by amine functionalization of the supports using monoethanolamine. The performance and stability of the non-functionalized and amine-functionalized NiFe2O4- and CoFe2O4-supported palladium catalysts were compared in the industrially important nitrobenzene hydrogenation reaction. All catalysts showed high catalytic activity during aniline synthesis; complete nitrobenzene conversion and high aniline yield (above 97 n/n%) and selectivity (above 98 n/n%) were achieved. However, during reuse tests, the activity of the non-functionalized catalysts decreased, as the palladium was leached from the surface of the support. On the other hand, in the case of their amine-functionalized counterparts, there was no decrease in activity, and a non-significant decrease in palladium content could be measured. Based on these results, it can be concluded that amine functionalization of transition metal ferrites may result in more effective catalysts due to the enhanced metal–carrier interaction between the support and the precious metal.}, year = {2023}, eissn = {1422-0067}, orcid-numbers = {Kristály, Ferenc/0000-0002-0075-5994; Kaleta, Zoltán/0000-0003-2350-5100; Nagy, Miklós/0000-0002-3484-2244} } @article{MTMT:34113601, title = {Volatile emissions of flexible polyurethane foams as a function of time}, url = {https://m2.mtmt.hu/api/publication/34113601}, author = {Hornyák-Mester, Enikő and Mentes, Dóra and Farkas, László and Hatvani-Nagy, Alpár Ferencz and Varga, Miklós and Viskolcz, Béla and Muránszky, Gábor and Fiser, Béla}, doi = {10.1016/j.polymdegradstab.2023.110507}, journal-iso = {POLYM DEGRAD STABIL}, journal = {POLYMER DEGRADATION AND STABILITY}, volume = {216}, unique-id = {34113601}, issn = {0141-3910}, year = {2023}, eissn = {1873-2321}, orcid-numbers = {Fiser, Béla/0000-0003-0603-4626} } @misc{MTMT:33826812, title = {Evaluation of emissions from polyurethane car seat foams}, url = {https://m2.mtmt.hu/api/publication/33826812}, author = {Hornyák-Mester, Enikő and Mentes, Dóra and Hatvani-Nagy, Alpár Ferencz and Varga, Miklós and Farkas, László and Fiser, Béla and Viskolcz, Béla and Muránszky, Gábor}, unique-id = {33826812}, year = {2023}, orcid-numbers = {Fiser, Béla/0000-0003-0603-4626} }