TY - CONF AU - Balassa, Csilla AU - Németh, Norbert AU - Kristály, Ferenc TI - Rare elements and its mineralogy in rock bodies from NE Hungary T2 - LIV. Meeting of Young Geoscientists - 54. Ifjú Szakemberek Ankétja PY - 2024 SP - 60 EP - 62 PG - 3 UR - https://m2.mtmt.hu/api/publication/34840682 ID - 34840682 LA - English DB - MTMT ER - TY - JOUR AU - Kereskényi, Erika AU - Kristály, Ferenc AU - Kasztovszky, Zsolt AU - Fehér, Béla TI - HYALOPHANE- AND TOURMALINE-BEARING K-METASOMATISED POLISHED STONE IMPLEMENT FROM NORTHERN HUNGARY [HIALOFÁN- ÉS TURMALIN TARTALMÚ KÁLIMETASZOMATISZÁLT VULKANIT NYERSANYAGÚ CSISZOLT KŐESZKÖZ] JF - ARCHEOMETRIAI MŰHELY J2 - ARCHEOMETRIAI MŰHELY VL - 21 PY - 2024 IS - 2 SP - 119 EP - 130 PG - 12 SN - 1786-271X DO - 10.55023/issn.1786-271X.2024-011 UR - https://m2.mtmt.hu/api/publication/34780732 ID - 34780732 LA - English DB - MTMT ER - TY - JOUR AU - Balassa, Csilla AU - Németh, Norbert AU - Kristály, Ferenc TI - Radioaktív anomáliát mutató kőzettestek az Upponyi- és Szendrői-hegységekből JF - TERTIARY AND QUATERNARY STRATA J2 - TQ STRATA VL - 2 PY - 2024 SP - 4 EP - 7 PG - 4 SN - 3004-2275 UR - https://m2.mtmt.hu/api/publication/34728779 ID - 34728779 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Dallos, Zsolt AU - Golle-Leidreiter, Philipp AU - Molnár, Zsombor AU - Kristály, Ferenc AU - Kovács Kis, Viktória AU - Dódony, István TI - Structural Changes of Bioapatite during Heat Treatment JF - CRYSTAL GROWTH & DESIGN J2 - CRYST GROWTH DES VL - 24 PY - 2024 IS - 5 SP - 2058 EP - 2063 PG - 6 SN - 1528-7483 DO - 10.1021/acs.cgd.3c01375 UR - https://m2.mtmt.hu/api/publication/34722932 ID - 34722932 LA - English DB - MTMT ER - TY - JOUR AU - Nagy, Erzsébet AU - Kristály, Ferenc AU - Kárpáti, Viktor AU - Mertinger, Valéria TI - In-situ investigation of the decomposition process in cold-rolled Nb53Ti47 alloy JF - HELIYON J2 - HELIYON VL - 10 PY - 2024 IS - 4 PG - 9 SN - 2405-8440 DO - 10.1016/j.heliyon.2024.e26543 UR - https://m2.mtmt.hu/api/publication/34677613 ID - 34677613 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 - CONF AU - Balassa, Csilla AU - Szabó, Norbert Péter AU - Németh, Norbert AU - Kristály, Ferenc TI - Geochemistry of HFSE enriched rock bodies from Bükk Mts., NE Hungary – a geostatistical case study T2 - 53. Meeting of Young Geoscientists - Ifjú Szakemberek Ankétja PY - 2023 SP - 82 EP - 83 PG - 2 UR - https://m2.mtmt.hu/api/publication/34840698 ID - 34840698 LA - English DB - MTMT ER - TY - JOUR AU - Sipeki, Lilla AU - Kristály, Ferenc TI - Fitobányászati kísérletek napraforgóval JF - DIÁKTUDOMÁNY: A MISKOLCI EGYETEM TUDOMÁNYOS DIÁKKÖRI MUNKÁIBÓL J2 - DIÁKTUDOMÁNY VL - 16 PY - 2023 SP - 22 EP - 28 PG - 7 SN - 2062-0721 UR - https://m2.mtmt.hu/api/publication/34534157 ID - 34534157 LA - Hungarian DB - MTMT ER - TY - CONF AU - Pálfi, Ivett AU - Pósfai, Mihály AU - Demény, Attila AU - Czuppon, György AU - Pekker, Péter AU - May, Zoltán AU - Visnovitz, Ferenc AU - Kristály, Ferenc AU - Veres, D AU - Arnoud, F AU - Szalai, Zoltán AU - Korponai, J AU - Molnár, M AU - Szabó, Z AU - Magyari, Enikő Katalin ED - Kovács, B ED - Virthné Kemes, K TI - Environmental and climatic changes over the past 10 000 years inferred from geochemistry of Lake Balaton T2 - Víz- és szennyvízkezelés az iparban (VSZI '23) : IX. Soós Ernő Nemzetközi Tudományos Konferencia = Water and wastewater treatment in the industry 2023 : IX. Soós Ernő International Scientific Conference PB - Soós Ernő Kutató-fejlesztő Központ C1 - Nagykanizsa PY - 2023 SP - 38 UR - https://m2.mtmt.hu/api/publication/34525833 ID - 34525833 N1 - Poszter LA - English DB - MTMT ER - TY - JOUR AU - Prekob, Ádám AU - Szegedi, Máté Péter AU - Muránszky, Gábor AU - Kristály, Ferenc AU - Nagy, Miklós AU - Halasi, Gyula AU - Szamosvölgyi, Ákos AU - Fiser, Béla AU - Viskolcz, Béla AU - Vanyorek, László TI - Development of Magnetizable, Nickel–Ferrite-Decorated Carbon Nanocomposites as Hydrogenation Catalyst for Aniline Synthesis JF - INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES J2 - INT J MOL SCI VL - 24 PY - 2023 IS - 24 PG - 16 SN - 1661-6596 DO - 10.3390/ijms242417547 UR - https://m2.mtmt.hu/api/publication/34441840 ID - 34441840 N1 - Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, Miskolc, 3515, Hungary Institute of Mineralogy and Geology, University of Miskolc, Miskolc-Egyetemváros, Miskolc, 3515, Hungary Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla Square 1., Szeged, 6720, Hungary ELI-ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner Utca 3., Szeged, H-6728, Hungary Higher Education and Industrial Cooperation Centre, University of Miskolc, Miskolc-Egyetemváros, Miskolc, 3515, Hungary Ferenc Rakoczi II Transcarpathian Hungarian College of Higher Education, Beregszász, 90200, Ukraine Department of Physical Chemistry, Faculty of Chemistry, University of Lodz, Lodz, 90-236, Poland Export Date: 31 January 2024 Correspondence Address: Vanyorek, L.; Institute of Chemistry, Miskolc-Egyetemváros, Hungary; email: laszlo.vanyorek@uni-miskolc.hu AB - 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. LA - English DB - MTMT ER -