scholarly journals Global Activity Search Uncovers Reaction Induced Concomitant Catalyst Restructuring for Alkane Dissociation on Model Pt Catalysts

ACS Catalysis ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 1877-1885
Author(s):  
Geng Sun ◽  
Jack T. Fuller ◽  
Anastassia N. Alexandrova ◽  
Philippe Sautet
Keyword(s):  
Pt Catalysts ◽  
Catalyst Restructuring ◽  
Global Activity

Sunflower oil hydrogenation on Pt catalysts: Comparison between conventional process and homogeneous phase operation using supercritical propane

2008 ◽  
Vol 133-135 ◽  
pp. 836-841 ◽  
Author(s):  
Cristian M. Piqueras ◽  
Gabriela Tonetto ◽  
Susana Bottini ◽  
Daniel E. Damiani
Keyword(s):  
Sunflower Oil ◽  
Pt Catalysts ◽  
Homogeneous Phase ◽  
Conventional Process

Atomic Design and Fine-Tuning of Subnanometric Pt Catalysts to Tame Hydrogen Generation

ACS Catalysis ◽  
2021 ◽  
pp. 4146-4156
Author(s):  
Jie Yang ◽  
Wenzhao Fu ◽  
Chaoqiu Chen ◽  
Wenyao Chen ◽  
Wugen Huang ◽  
...  
Keyword(s):  
Hydrogen Generation ◽  
Fine Tuning ◽  
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 Ru surface composition on the CO tolerance of Ru modified carbon supported Pt catalysts

2004 ◽  
Vol 6 (8) ◽  
pp. 1792 ◽  
Author(s):  
E. M. Crabb ◽  
M. K. Ravikumar ◽  
D. Thompsett ◽  
M. Hurford ◽  
A. Rose ◽  
...  
Keyword(s):  
Surface Composition ◽  
Pt Catalysts ◽  
Co Tolerance ◽  
Supported Pt Catalysts

scholarly journals Validity of the Global Activity Limitation Indicator (GALI) to evaluate severity of disability

2020 ◽  
Author(s):  
Belisa Tarazona ◽  
Jesús González-Enríquez ◽  
Javier Almazán-Isla ◽  
Enrique Alcalde-Cabero ◽  
Jesús de Pedro-Cuesta ◽  
...  
Keyword(s):  
Confidence Interval ◽  
Gold Standard ◽  
Great Part ◽  
Activity Limitation ◽  
Item Questionnaire ◽  
Severity Of Disability ◽  
Degree Of Disability ◽  
Degree Of Severity ◽  
Global Activity ◽  
Limited Sensitivity

Abstract Our aim was to estimate the validity of the Global Activity Limitation Indicator (GALI) when measuring the severity level of disability. Data came from 153 residents of Spain, who requested an evaluation of their degree of disability. We compared disability classifications (severe vs. non-severe) from GALI against those from the 36-item questionnaire WHODAS 2.0, the current gold standard measure of disability. The sensitivity of GALI to detect severe disability was 58.3% [95% confidence interval (CI):43.2–72.4], and the specificity was 84.8% (95% CI: 76.4–91.0). Thus, the validity of GALI to accurately categorize the degree of severity of an individual’s disability is not high, this in great part due to its limited sensitivity.

Methanol electro-oxidation on mesocarbon microbead supported Pt catalysts

Carbon ◽  
2002 ◽  
Vol 40 (13) ◽  
pp. 2375-2380 ◽  
Author(s):  
Yi Cheng Liu ◽  
Xin Ping Qiu ◽  
Yu Qing Huang ◽  
Wen Tao Zhu
Keyword(s):  
Pt Catalysts ◽  
Supported Pt Catalysts ◽  
Electro Oxidation

Monte Carlo simulations of carbon monoxide oxidation on Pt catalysts

1989 ◽  
Vol 208 (1-2) ◽  
pp. L80-L90
Author(s):  
P. Araya ◽  
W. Porod ◽  
R. Sant ◽  
E.E. Wolf
Keyword(s):  
Carbon Monoxide ◽  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Carbon Monoxide Oxidation ◽  
Pt Catalysts
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