Thermodynamic and kinetic characteristics of liquid phase hydrogenation of substituted nitrobenzenes

2012 ◽  
Vol 86 (6) ◽  
pp. 908-912
Author(s):  
Yu. V. Minenkov ◽  
O. V. Lefedova ◽  
I. V. Smirnova ◽  
M. P. Nemtseva
Keyword(s):  
Liquid Phase ◽  
Kinetic Characteristics ◽  
Liquid Phase Hydrogenation

scholarly journals Liquid-Phase Hydrogenation of 1-Phenyl-1-propyne on the Pd1Ag3/Al2O3 Single-Atom Alloy Catalyst: Kinetic Modeling and the Reaction Mechanism

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3286
Author(s):  
Alexander V. Rassolov ◽  
Igor S. Mashkovsky ◽  
Galina N. Baeva ◽  
Galina O. Bragina ◽  
Nadezhda S. Smirnova ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Liquid Phase ◽  
Reaction Kinetic ◽  
Single Atom ◽  
Kinetic Characteristics ◽  
Liquid Phase Hydrogenation ◽  
Alkyne Hydrogenation ◽  
Kinetics Of ◽  
Al2o3 Catalyst ◽  
Single Atom Alloy

This research was focused on studying the performance of the Pd1Ag3/Al2O3 single-atom alloy (SAA) in the liquid-phase hydrogenation of di-substituted alkyne (1-phenyl-1-propyne), and development of a kinetic model adequately describing the reaction kinetic being also consistent with the reaction mechanism suggested for alkyne hydrogenation on SAA catalysts. Formation of the SAA structure on the surface of PdAg3 nanoparticles was confirmed by DRIFTS-CO, revealing the presence of single-atom Pd1 sites surrounded by Ag atoms (characteristic symmetrical band at 2046 cm−1) and almost complete absence of multiatomic Pdn surface sites (<0.2%). The catalyst demonstrated excellent selectivity in alkyne formation (95–97%), which is essentially independent of P(H2) and alkyne concentration. It is remarkable that selectivity remains almost constant upon variation of 1-phenyl-1-propyne (1-Ph-1-Pr) conversion from 5 to 95–98%, which indicates that a direct alkyne to alkane hydrogenation is negligible over Pd1Ag3 catalyst. The kinetics of 1-phenyl-1-propyne hydrogenation on Pd1Ag3/Al2O3 was adequately described by the Langmuir-Hinshelwood type of model developed on the basis of the reaction mechanism, which suggests competitive H2 and alkyne/alkene adsorption on single atom Pd1 centers surrounded by inactive Ag atoms. The model is capable to describe kinetic characteristics of 1-phenyl-1-propyne hydrogenation on SAA Pd1Ag3/Al2O3 catalyst with the excellent explanation degree (98.9%).

Intermetallic Pd1–Zn1 nanoparticles in the selective liquid-phase hydrogenation of substituted alkynes

2017 ◽  
Vol 58 (4) ◽  
pp. 480-491 ◽  
Author(s):  
I. S. Mashkovsky ◽  
P. V. Markov ◽  
G. O. Bragina ◽  
A. V. Rassolov ◽  
G. N. Baeva ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Liquid Phase Hydrogenation

scholarly journals Liquid Phase Hydrogenation of Nitrobenzene over Nickel Supported on Titania

2012 ◽  
Vol 33 (7-8) ◽  
pp. 1299-1305 ◽  
Author(s):  
K. Joseph Antony RAJ ◽  
M.G. PRAKASH ◽  
R. MAHALAKSHMY ◽  
T. ELANGOVAN ◽  
B. VISWANATHAN
Keyword(s):  
Liquid Phase ◽  
Liquid Phase Hydrogenation

Silicon carbide foam decorated with carbon nanofibers as catalytic stirrer in liquid-phase hydrogenation reactions

2014 ◽  
Vol 469 ◽  
pp. 81-88 ◽  
Author(s):  
Lai Truong-Phuoc ◽  
Tri Truong-Huu ◽  
Lam Nguyen-Dinh ◽  
Walid Baaziz ◽  
Thierry Romero ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Liquid Phase ◽  
Carbon Nanofibers ◽  
Liquid Phase Hydrogenation ◽  
Hydrogenation Reactions

scholarly journals Influence of Sulfuric Acid on the Performance of Ruthenium-based Catalysts in the Liquid-Phase Hydrogenation of Levulinic Acid to γ-Valerolactone

ChemSusChem ◽  
2017 ◽  
Vol 10 (14) ◽  
pp. 2891-2896 ◽  
Author(s):  
Jamal Ftouni ◽  
Homer C. Genuino ◽  
Ara Muñoz-Murillo ◽  
Pieter C. A. Bruijnincx ◽  
Bert M. Weckhuysen
Keyword(s):  
Sulfuric Acid ◽  
Liquid Phase ◽  
Levulinic Acid ◽  
Liquid Phase Hydrogenation
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