Hydrogenation of xylenes over supported Pt catalysts. Influence of different variables on their catalytic activity

1992 ◽  
Vol 46 (2) ◽  
pp. 305-312 ◽  
Author(s):  
M. A. Aramendía ◽  
V. Borau ◽  
C. Jiménez ◽  
J. M. Marinas ◽  
F. Rodero ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Pt Catalysts ◽  
Supported Pt Catalysts

scholarly journals Influence of the Reduction Temperature and the Nature of the Support on the Performance of Zirconia and Alumina-Supported Pt Catalysts for n-Dodecane Hydroisomerization

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 88
Author(s):  
Diana García-Pérez ◽  
Maria Consuelo Alvarez-Galvan ◽  
Jose M. Campos-Martin ◽  
Jose L. G. Fierro
Keyword(s):  
Catalytic Activity ◽  
Surface Area ◽  
Catalytic Properties ◽  
Catalytic Performance ◽  
Major Influence ◽  
Pt Catalysts ◽  
Reduction Temperature ◽  
Metal Dispersion ◽  
Tungsten Oxides ◽  
Supported Pt Catalysts

Catalysts based on zirconia- and alumina-supported tungsten oxides (15 wt % W) with a small loading of platinum (0.3 wt % Pt) were selected to study the influence of the reduction temperature and the nature of the support on the hydroisomerization of n-dodecane. The reduction temperature has a major influence on metal dispersion, which impacts the catalytic activity. In addition, alumina and zirconia supports show different catalytic properties (mainly acid site strength and surface area), which play an important role in the conversion. The NH3-TPD profiles indicate that the acidity in alumina-based catalysts is clearly higher than that in their zirconia counterparts; this acidity can be attributed to a stronger interaction of the WOx species with alumina. The PtW/Al catalyst was found to exhibit the best catalytic performance for the hydroisomerization of n-dodecane based on its higher acidity, which was ascribed to its larger surface area relative to that of its zirconia counterparts. The selectivity for different hydrocarbons (C7–10, C11 and i-C12) was very similar for all the catalysts studied, with branched C12 hydrocarbons being the main products obtained (~80%). The temperature of 350 °C was clearly the best reduction temperature for all the catalysts studied in a trickled-bed-mode reactor.

Effect of Pt Dispersion on the Catalytic Activity of Supported Pt Catalysts for Diesel Hydrocarbon Oxidation

2013 ◽  
Vol 56 (1-8) ◽  
pp. 249-254 ◽  
Author(s):  
Masaaki Haneda ◽  
Motoi Sasaki ◽  
Hideaki Hamada ◽  
Masakuni Ozawa
Keyword(s):  
Catalytic Activity ◽  
Hydrocarbon Oxidation ◽  
Pt Catalysts ◽  
Supported Pt Catalysts

Hydrogenation of tetralin on silica–alumina-supported Pt catalysts II. Influence of the support on catalytic activity

2007 ◽  
Vol 251 (2) ◽  
pp. 497-506 ◽  
Author(s):  
M WILLIAMS ◽  
B FONFE ◽  
C WOLTZ ◽  
A JENTYS ◽  
J VANVEEN ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Pt Catalysts ◽  
Supported Pt Catalysts ◽  
Silica Alumina

Hydrogenation ofp-Nitrophenol top-Aminophenol as a Test Reaction for the Catalytic Activity of Supported Pt Catalysts

2014 ◽  
Vol 37 (3) ◽  
pp. 551-554 ◽  
Author(s):  
Michael Goepel ◽  
Majd Al-Naji ◽  
Patrick With ◽  
Gerald Wagner ◽  
Oliver Oeckler ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Pt Catalysts ◽  
Test Reaction ◽  
Supported Pt Catalysts

Defective Nb2O5-supported Pt catalysts for CO oxidation: Promoting catalytic activity via oxygen vacancy engineering

2019 ◽  
Vol 375 ◽  
pp. 124-134 ◽  
Author(s):  
Si Bui Trung Tran ◽  
Hanseul Choi ◽  
Sunyoung Oh ◽  
Jeong Young Park
Keyword(s):  
Catalytic Activity ◽  
Oxygen Vacancy ◽  
Co Oxidation ◽  
Pt Catalysts ◽  
Supported Pt Catalysts

PtFe nanoparticles supported on electroactive Au–PANI core@shell nanoparticles for high performance bifunctional electrocatalysis

2017 ◽  
Vol 5 (26) ◽  
pp. 13692-13699 ◽  
Author(s):  
Ji-Eun Lee ◽  
Yu Jin Jang ◽  
Wenqian Xu ◽  
Zhenxing Feng ◽  
Hee-Young Park ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Electrocatalytic Activity ◽  
High Performance ◽  
Core Shell ◽  
Pt Catalysts ◽  
Oxidation Reactions ◽  
Shell Nanoparticles ◽  
Supported Pt Catalysts ◽  
Reduction And Oxidation ◽  
Core Shell Nanoparticles

Efficient bifunctional electrocatalytic activity for reduction and oxidation reactions based on the AuNP@PANI@PtFe core–multishell nanostructures is presented. The AuNP@PANI@PtFe exhibits an enhanced catalytic activity and durability for ORR and MOR than conventional carbon supported Pt catalysts.

scholarly journals Hollow MFI Zeolite Supported Pt Catalysts for Highly Selective and Stable Hydrodeoxygenation of Guaiacol to Cycloalkanes

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 362 ◽  
Author(s):  
Xiaopo Niu ◽  
Fuxiang Feng ◽  
Gang Yuan ◽  
Xiangwen Zhang ◽  
Qingfa Wang
Keyword(s):  
Catalytic Activity ◽  
Active Sites ◽  
Acid Sites ◽  
Pt Catalyst ◽  
Pt Catalysts ◽  
Mfi Zeolite ◽  
Long Term Stability ◽  
Supported Pt Catalysts ◽  
Hierarchical Porous ◽  
Ft Ir

Hollow Silicalite-1 and ZSM-5 zeolites with hierarchical porous shells have been synthesized by using a dissolution-recrystallization method. The morphology, structure, and acidity of these zeolites supported Pt catalysts were characterized by XRD, FT-IR, MAS-SSNMR, FE-SEM, FE-TEM, N2-BET, XPS, NH3-TPD, and CO pulse chemisorption. Compared to the conventional ZSM-5 supported Pt catalyst, the special structure in hollow ZSM-5 zeolite significantly promotes the dispersion of metallic Pt and the synergistic effect between metal active sites and acid sites. These boost the catalytic activity, selectivity of guaiacol hydrodeoxygenation toward cycloalkanes and long-term stability over the Pt/hollow ZSM-5 catalyst combined with improved mass transfer of products and reactants derived from the hierarchical hollow porous structure. Moreover, the Pt/hollow ZSM-5 catalyst exhibits excellent low temperature catalytic activity to completely transform guaiacol into cycloalkanes with the cyclohexane selectivity of more than 93% at 220 °C, suggesting that hollow ZSM-5 zeolite is a promising support for upgrading of bio-oils.

scholarly journals Mesoporous Co3O4 supported Pt catalysts for low-temperature oxidation of acetylene

RSC Advances ◽  
2017 ◽  
Vol 7 (30) ◽  
pp. 18592-18600 ◽  
Author(s):  
Qi Wang ◽  
Jian Liu ◽  
Yongheng Li ◽  
Zhen Zhao ◽  
Weiyu Song ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Good Stability ◽  
Pt Catalysts ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Supported Pt Catalysts

0.6Pt/meso-Co3O4 exhibits the highest catalytic activity of acetylene oxidation at 120 °C and good stability for at least 60 h.

scholarly journals Hydrogenation of Monoalkylbenzenes over Supported Pt Catalysts. Influence of Different Variables on the Catalytic Activity

1990 ◽  
Vol 63 (4) ◽  
pp. 1275-1277 ◽  
Author(s):  
M. Angeles Aramendía ◽  
Victoriano Borau ◽  
César Jiménez ◽  
J. María Marinas ◽  
Francisco Rodero ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Pt Catalysts ◽  
Supported Pt Catalysts
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