Bentonite as eco-friendly natural mineral support for Pd/CoFe 2 O 4 catalyst applied in toluene diamine synthesis.

Autor: Hatvani-Nagy AF; Higher Education and Industrial Cooperation Centre, University of Miskolc, Miskolc-Egyetemváros, 3515, Hungary.; Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, 3515, Hungary., Hajdu V; Higher Education and Industrial Cooperation Centre, University of Miskolc, Miskolc-Egyetemváros, 3515, Hungary.; Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, 3515, Hungary., Ilosvai ÁM; Higher Education and Industrial Cooperation Centre, University of Miskolc, Miskolc-Egyetemváros, 3515, Hungary.; Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, 3515, Hungary., Muránszky G; Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, 3515, Hungary., Sikora E; Higher Education and Industrial Cooperation Centre, University of Miskolc, Miskolc-Egyetemváros, 3515, Hungary.; Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, 3515, Hungary., Kristály F; Institute of Mineralogy and Geology, University of Miskolc, 3515, Miskolc-Egyetemváros, Hungary., Daróczi L; Department of Solid State Physics, University of Debrecen, P.O. Box 2, Debrecen, 4010, Hungary., Viskolcz B; Higher Education and Industrial Cooperation Centre, University of Miskolc, Miskolc-Egyetemváros, 3515, Hungary.; Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, 3515, Hungary., Fiser B; Higher Education and Industrial Cooperation Centre, University of Miskolc, Miskolc-Egyetemváros, 3515, Hungary. bela.fiser@uni-miskolc.hu.; Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, 3515, Hungary. bela.fiser@uni-miskolc.hu.; Ferenc Rakoczi II Transcarpathian Hungarian College of Higher Education, Beregszász, 90200, Ukraine. bela.fiser@uni-miskolc.hu.; Department of Physical Chemistry, Faculty of Chemistry, University of Lodz, 90-236, Lodz, Poland. bela.fiser@uni-miskolc.hu., Vanyorek L; Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, 3515, Hungary. laszlo.vanyorek@uni-miskolc.hu.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2024 Feb 20; Vol. 14 (1), pp. 4193. Date of Electronic Publication: 2024 Feb 20.
DOI: 10.1038/s41598-024-54792-5
Abstrakt: 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.
(© 2024. The Author(s).)
Databáze: MEDLINE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje