Zobrazeno 1 - 10
of 32
pro vyhledávání: '"and Juhani Väyrynen"'
X-Ray Photoelectron Spectroscopy Investigation of Pd-Beta Zeolite Catalysts with Different Acidities
Autor:
Teemu Heikkilä, D. Yu. Murzin, D. Chichova, Päivi Mäki-Arvela, Tapio Salmi, Juhani Väyrynen, Narendra Kumar
Publikováno v:
Topics in Catalysis. 52:359-379
Three different H-Beta zeolites with SiO2/Al2O3 molar ratios of 300, 150 and 25 were loaded with palladium by evaporation–impregnation method using Pd(NO3)2 as a precursor. Dependence between the electronic states of Pd as a function of the acidity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80ab3631eb45cb6ef31e58ec9f0d1cd6
https://doi.org/10.1007/s11244-008-9169-x
https://doi.org/10.1007/s11244-008-9169-x
Autor:
Pablo Pérez Casal, Hannu Karhu, Jyri-Pekka Mikkola, Tapio Salmi, Juhani Väyrynen, Jyrki Kuusisto
Publikováno v:
Chemical Engineering Journal. 115:93-102
Kinetics of d -fructose hydrogenation over a copper catalyst (61 wt% CuO and 39 wt% ZnO) in aqueous solutions was studied. The hydrogenation experiments were carried out batchwise in a three-phase laboratory-scale reactor (300 ml, Parr Co.), operatin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f7bee3495b9323cacc9c41db2a38b51
https://doi.org/10.1016/j.cej.2005.09.020
https://doi.org/10.1016/j.cej.2005.09.020
Autor:
Tapio Salmi, Narendra Kumar, Juhani Väyrynen, Andreas Bernas, Pekka Laukkanen, Dmitry Yu. Murzin
Publikováno v:
Applied Catalysis A: General. 267:121-133
Selective double bond isomerization of linoleic acid to cis-9,trans-11-conjugated linoleic acid and trans-10,cis-12-conjugated linoleic acid (CLA) was performed batchwise under kinetic control at 165 °C in an n-decane solution. Commercial H2-preacti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::352846fa4c0eb27696b654f004534f43
https://doi.org/10.1016/j.apcata.2004.02.032
https://doi.org/10.1016/j.apcata.2004.02.032
Publikováno v:
Colloids and Surfaces A: Physicochemical and Engineering Aspects. 235:45-55
The ex situ atomic force microscopy (AFM), secondary electron microscopy (SEM) and X-ray diffraction (XRD) measurements were combined with the in situ electrochemical impedance spectroscopy (EIS) measurements to reveal the interaction of solid partic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5446952efad28c4cc979ac0ba3fbb4c
https://doi.org/10.1016/j.colsurfa.2004.01.011
https://doi.org/10.1016/j.colsurfa.2004.01.011
Autor:
Ahmad Kalantar Neyestanaki, Tapio Salmi, Juhani Väyrynen, Päivi Mäki-Arvela, Hannu Karhu, Henrik Backman, Dmitry Yu. Murzin
Publikováno v:
Journal of Catalysis. 218:267-279
The kinetics of the gas-phase hydrogenation of o -xylene over Pt/alumina catalysts was studied at 430–520 K, a hydrogen partial pressure of 0.19–0.36, and an o -xylene partial pressure of 0.04–0.10. The catalysts were characterized by H 2 / o -
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::870a0b831a96cca007b8dbda46d1e8db
https://doi.org/10.1016/s0021-9517(03)00070-8
https://doi.org/10.1016/s0021-9517(03)00070-8
Autor:
Teemu Heikkilä, Jan Hájek, Ivo Paseka, D. Yu. Murzin, Pekka Laukkanen, Narendra Kumar, Juhani Väyrynen, Ensio Laine, Tapio Salmi, Päivi Mäki-Arvela
Publikováno v:
Applied Catalysis A: General. 251:385-396
Ru-modified MCM-41 mesoporous molecular sieve and Y zeolite catalysts were synthesised and characterised using XRD, electrochemical voltammetry, ESCA (XPS), nitrogen adsorption and H2-TPD. Selective liquid-phase hydrogenation of cinnamaldehyde to cin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::185b085cc648cbd5febfab765847d332
https://doi.org/10.1016/s0926-860x(03)00345-4
https://doi.org/10.1016/s0926-860x(03)00345-4
Autor:
H. Backman, D. Yu . Murzin, Juhani Väyrynen, Hannu Karhu, A. Kalantar Neyestanaki, Päivi Mäki-Arvela, Tapio Salmi
Publikováno v:
Industrial & Engineering Chemistry Research. 42:3230-3236
A knitted silica fiber was prepared and employed as a support material for platinum catalysts. Different knitted silica-fiber supported platinum catalysts were prepared using several platinum precursors. The catalysts were characterized by N2 physiso
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::306d88961abfcde18440452f84567b66
https://doi.org/10.1021/ie020827x
https://doi.org/10.1021/ie020827x
Autor:
Robert P. Socha, Juhani Väyrynen
Publikováno v:
Applied Surface Science. :636-643
X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectroscopy (ToF-SIMS) were used to study the chemical composition of SiC crystal surface treated with hydrofluoric acid and oxidized in hydrogen peroxide solutions. The ox
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a25b3ee232de4e81296565488f61de2
https://doi.org/10.1016/s0169-4332(03)00138-7
https://doi.org/10.1016/s0169-4332(03)00138-7
Autor:
Tapio Ollonqvist, Narendra Kumar, Juhani Väyrynen, Lasse-Pekka Tiainen, D. Yu. Murzin, Päivi Mäki-Arvela, Tapio Salmi, Marina Lindblad, K Demirkan, Rainer Sjöholm
Publikováno v:
Applied Catalysis A: General. 241:271-288
Selective hydrogenation of citral to citronellol has been investigated over Ni supported catalysts. The aim was to compare different support materials and catalyst preparation methods. Selectivity to citronellol was dependent on conversion. The highe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7ecfde4cd6436be0c77a0fcd2800bd1
https://doi.org/10.1016/s0926-860x(02)00497-0
https://doi.org/10.1016/s0926-860x(02)00497-0
Autor:
Henrik Backman, Hannu Karhu, Juhani Väyrynen, D. Yu. Murzin, A. Kalantar Neyestanaki, Tapio Salmi, Päivi Mäki-Arvela
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 193:237-250
Gas-phase hydrogenation of o-xylene was investigated over 1 wt.% Pd/alumina catalyst at 430–520 K. The catalyst was characterised by H2-temperature programmed desorption (TPD), o-xylene-TPD, H2-chemisorption, scanning electron microscope (SEM)/ener
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::609d63f1c76e2a62b66874d648154d54
https://doi.org/10.1016/s1381-1169(02)00461-2
https://doi.org/10.1016/s1381-1169(02)00461-2