Výsledky vyhledávání - "Welters, W.J.J."

A new assignment of the signals in 23NA dor NMR to sodium sites in dehydrated NaY zeolite

Autor: Verhulst, H.A.M., Welters, W.J.J., Vorbeck, G., Ven, van de, L.J.M., Beer, de, V.H.J., Santen, van, R.A., Haan, de, J.W., Karge, H.G., Weitkamp, J.

Publikováno v: Zeolite science 1994 : recent progress and discussions ; supplementary materials to the 10th International Zeolite Conference, 95-96
STARTPAGE=95;ENDPAGE=96;TITLE=Zeolite science 1994 : recent progress and discussions ; supplementary materials to the 10th International Zeolite Conference

A new assignment of the signals in the 23Na DOR NMR spectra to the different Na sites in dehydrated NaY zeolite is presented. 23Na DOR- and MAS-NMR measurements of dehydrated NaY, Ca2+ exchanged NaY samples and NaY samples in which Mo(CO)6 is adsorbe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab3138c07dbcd5d9f567d80725ab7512
https://doi.org/10.1016/s0167-2991(06)81103-1

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Zeolite Y type supported nickel and molybdenum sulfides: relation between metal sulfide distribution and catalytic properties in thiophene hydrodesulfurization

Autor: Vorbeck, G., Welters, W.J.J., van den Ven, L.J.M., Zandbergen, Henny W., de Haan, Jan W., de Beer, V.H.J., van Santen, Rutger A.

Publikováno v: Studies in Surface Science and Catalysis, 84, 1617-1624. Elsevier

NaY supported Mo or Ni sulfide catalysts prepared by impregnation, ion exchange or gas phase deposition followed by various pretreatment procedures show different catalytic properties in thiophene hydrodesulfurization. These differences are discussed

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::042729cd9d1deb810a8b57cf1195bc92
https://research.tue.nl/nl/publications/0702c142-ce36-472b-9b39-e0713e2fb727

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Influence of zeolite acidity on thiophene hydrodesulfurization activity

Autor: Welters, W.J.J., Beer, de, V.H.J., Santen, van, R.A.

Publikováno v: Applied Catalysis. A, General, 119(2), 253-269. Elsevier

For H(x)NaY supported metal sulfide catalysts the intrinsic catalytic activity (thiophene hydrodesulfurization, HDS) and the metal sulfide dispersion (dynamic oxygen chemisorption) are measured as a function of the acidity of the zeolite support (det

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::b231fc284e92c4549aca867741d45444
https://research.tue.nl/nl/publications/3c39d5d6-08b9-49af-b399-6c4bc192efff

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Hydrodesulfurization Activity of Zeolite Supported Nickel-and Cobalt Sulfide Catalysts

Autor: Welters, W.J.J., Koranyi, T.I., de Beer, V.H.J., van Santen, R.A., Guczi, L., Solymosi, F., Tétényi, P.

Publikováno v: New Frontiers in Catalysis : Proceedings of the 10th International Congress on Catalysis, Budapest, July 19-24, 1992. Part C, 1931-1934
STARTPAGE=1931;ENDPAGE=1934;TITLE=New Frontiers in Catalysis : Proceedings of the 10th International Congress on Catalysis, Budapest, July 19-24, 1992. Part C

Various zeolite (NaY or CaY) supported metal sulfide (Ni or Co) catalysts were prepared (impregnation or ion exchange) and characterized by means of thiophene HDS, 129 Xe NMR and TPS. Especially the acidic zeolites showed a very high initial activity

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb34ae26889d6280602dc2b3f1d870c9
https://doi.org/10.1016/s0167-2991(08)64193-2

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Reactivity of carbon monoxide on vanadium-promoted rhodium catalysts as studied with transient techniques

Autor: Koerts, T., Welters, W.J.J., Santen, van, R.A.

Publikováno v: Journal of Catalysis, 134(1), 1-12. Academic Press Inc.

The effect of vanadium promotion on the kinetics of CO methanation on silica-based rhodium catalysts was probed. Transient model experiments employing temperature-programmed surface reaction spectroscopy and pulse surface reaction rate analysis were

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::e1ca7db16f5c2534fa4e314783ae5b74
https://research.tue.nl/nl/publications/2b560185-25f7-4047-8fa8-9308cb14206d

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Promotion by vanadium compound of the elementary reaction steps in the synthesis gas reaction catalyzed by rhodium

Autor: Koerts, T., Welters, W.J.J., Santen, van, R.A., Nonneman, L.E.Y., Ponec, V., Holmen, A., Jens, K.-J., Kolboe, S.

Publikováno v: Natural gas conversion : international symposium : proceedings, Oslo, August 12-17, 1990, 235-241
STARTPAGE=235;ENDPAGE=241;TITLE=Natural gas conversion : international symposium : proceedings, Oslo, August 12-17, 1990

In order to understand the promoting effect of vanadium compound on rhodium catalysts in synthesis gas conversion, changes in reaction rates of elementary steps and the surface concentration of intermediates have been monitored. Vanadium promotion en

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6427c49f1aeb687ff742367306bddaf7
https://research.tue.nl/nl/publications/b66f5a09-9d19-4f28-bbb2-32db9980acdf

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