Comparative investigation of hydrogen chemisorption and benzene hydrogenation activity of supported rhodium catalysts

1991 ◽  
Vol 87 (20) ◽  
pp. 3449 ◽  
Author(s):  
Venkataraman Vishwanathan ◽  
M. Sangaiah Rajashekar ◽  
Gutala Sreekanth ◽  
Sankarasubbier Narayanan
Keyword(s):  
Comparative Investigation ◽  
Hydrogen Chemisorption ◽  
Benzene Hydrogenation ◽  
Rhodium Catalysts ◽  
Hydrogenation Activity

Correlating Benzene Hydrogenation Activity with Binding Energies of Hydrogen and Benzene on Co-Based Bimetallic Catalysts

ChemPhysChem ◽  
2009 ◽  
Vol 10 (11) ◽  
pp. 1763-1765 ◽  
Author(s):  
Shuliang Lu ◽  
Carl A. Menning ◽  
Yuexiang Zhu ◽  
Jingguang G. Chen
Keyword(s):  
Bimetallic Catalysts ◽  
Binding Energies ◽  
Benzene Hydrogenation ◽  
Hydrogenation Activity

scholarly journals Dependency of Phenol Hydrogenation Activity on Hydrogen Chemisorption over Supported Palladium Catalysts

1997 ◽  
Vol 15 (3) ◽  
pp. 165-172 ◽  
Author(s):  
Nagendranath Mahata ◽  
V. Vishwanathan
Keyword(s):  
Atmospheric Pressure ◽  
Palladium Catalysts ◽  
Hydrogen Adsorption ◽  
Vapour Phase ◽  
Hydrogen Chemisorption ◽  
Hydrogenation Activity ◽  
Phenol Hydrogenation ◽  
Acidic Sites ◽  
Supported Palladium ◽  
Increasing Temperature

A series of catalysts containing 1 wt.% Pd supported on various oxides of commercial origin have been characterised by hydrogen adsorption at 298 K and evaluated for vapour-phase phenol hydrogenation at 473 K employing an H/phenol ratio of 5.4 at atmospheric pressure. The activity of phenol hydrogenation showed a dependence on the irreversible uptake of hydrogen. Among the catalysts studied, Pd/Al2O3 showed a decrease in activity with increasing temperature while Pd/MgO passed through a maximum at 503 K. The Pd/MgO catalysts exhibited a higher dispersion of smaller Pd crystallites leading to higher activity and total selectivity for cyclohexanone. The higher resistance towards deactivation and better stability of the Pd/MgO catalysts suggest that the acidic sites of alumina may be responsible for deactivation, thereby accounting for the lowering of activity with Pd/Al2O3 catalysts.

Study of Benzene Hydrogenation on Ni/Bentonite Catalyst

2011 ◽  
Vol 287-290 ◽  
pp. 1708-1711
Author(s):  
Rong Bin Zhang ◽  
Liang Wang ◽  
Yan Ju
Keyword(s):  
Catalytic Activity ◽  
Strong Interaction ◽  
Ni Catalyst ◽  
Hydrogen Chemisorption ◽  
Benzene Hydrogenation ◽  
Particle Sizes ◽  
Reaction Condition

Ni-based catalysts supported on bentonite, Al2O3 and SiO2 were prepared and characterized by the techniques of BET, XRD, TPR, H2-TPD. Benzene hydrogenation was chosen as a probe reaction to evaluate the catalytic activity and the results shown that bentonite supporting Ni catalyst(Ni/Bentonite) was more active than catalysts supported on Al2O3 and SiO2 in benzene hydrogenation. XRD and hydrogen chemisorption analyses indicated that the higher activity of Ni/Bentonite could be associated with the smaller particle sizes and better dispersion of Ni. The strong interaction between Ni and bentonite support might prevent the growth of Ni particles, as evidenced by TPR results. TPD analysis demonstrated that Ni/Bentonite adsorbed more hydrogen under reaction condition, thus resulting in its higher activity.

Distribution of molybdenum oxidation states in reduced molybdenum/titania catalysts: correlation with benzene hydrogenation activity

1990 ◽  
Vol 94 (4) ◽  
pp. 1520-1526 ◽  
Author(s):  
Roger B. Quincy ◽  
Marwan. Houalla ◽  
Andrew. Proctor ◽  
David M. Hercules
Keyword(s):  
Oxidation States ◽  
Benzene Hydrogenation ◽  
Hydrogenation Activity
Sign in / Sign up

Export Citation Format

Share Document