Pd–Ag/SiO2 bimetallic catalysts prepared by galvanic displacement for selective hydrogenation of acetylene in excess ethylene

2015 ◽  
Vol 5 (8) ◽  
pp. 4123-4132 ◽  
Author(s):  
Yunya Zhang ◽  
Weijian Diao ◽  
John R. Monnier ◽  
Christopher T. Williams
Keyword(s):  
Selective Hydrogenation ◽  
Bimetallic Catalysts ◽  
Galvanic Displacement ◽  
Acetylene Hydrogenation ◽  
Selective Hydrogenation Of Acetylene

A series of bimetallic Pd–Ag/SiO2 catalysts with Ag enriched on the surface were prepared by galvanic displacement. The bimetallic effect for these catalysts on acetylene hydrogenation was discussed.

scholarly journals Selective Hydrogenation of Acetylene Catalysed by a B12N12 Cluster Doped with a Single Nickel Atom: A DFT Study

Catalysts ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 115 ◽  
Author(s):  
Yun Wang ◽  
Lihua Kang
Keyword(s):  
Selective Hydrogenation ◽  
Density Functional ◽  
Reaction Path ◽  
Nickel Atom ◽  
Single Atom ◽  
Functional Theory ◽  
Acetylene Hydrogenation ◽  
Selective Hydrogenation Of Acetylene ◽  
New Type ◽  
Catalytic Performances

To obtain a catalyst based on a non-precious metal that can replace traditional palladium-based selective catalysts of acetylene hydrogenation, the catalytic performances of two different configurations of a B12N12 cluster doped with a single nickel atom were studied by a density functional theory computational approach. After analysing the effect that the adsorption of reactants onto the clusters has on the reaction path, we determined the lowest energy path for the acetylene double hydrogenation. Comparing the acetylene hydrogenation activities and ethylene product selectivities of the B11N12Ni and B12N11Ni clusters, which have different doping sites, we determined the activities of these two catalysts to be similar to each other; however, the B11N12Ni cluster was calculated to have higher selectivity for ethylene as a product. This difference may be related to the moderate adsorption of hydrogen and acetylene on the B11N12Ni cluster. As a new type of nickel-based single-atom catalyst, B11N12Ni clusters may have research value in the selective hydrogenation of acetylene.

Selective hydrogenation of acetylene in an ethylene-rich stream over silica supported Ag-Ni bimetallic catalysts

2017 ◽  
Vol 545 ◽  
pp. 90-96 ◽  
Author(s):  
Guang Xian Pei ◽  
Xiao Yan Liu ◽  
Aiqin Wang ◽  
Yang Su ◽  
Lin Li ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Bimetallic Catalysts ◽  
Selective Hydrogenation Of Acetylene

Selective Hydrogenation of Acetylene and Physicochemical Properties of Pd–Fe/Al2O3 Bimetallic Catalysts

2018 ◽  
Vol 92 (5) ◽  
pp. 862-869 ◽  
Author(s):  
V. D. Stytsenko ◽  
D. P. Mel’nikov ◽  
O. P. Tkachenko ◽  
E. V. Savel’eva ◽  
A. P. Semenov ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Selective Hydrogenation ◽  
Bimetallic Catalysts ◽  
Selective Hydrogenation Of Acetylene

scholarly journals A DFT Study of Acetylene Hydrogenation Catalyzed by S-Doped Pd1/g-C3N4

Catalysts ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 887 ◽  
Author(s):  
Lihua Kang ◽  
Mingyuan Zhu ◽  
Yu Zhao
Keyword(s):  
Activation Energy ◽  
Selective Hydrogenation ◽  
High Efficiency ◽  
Layered Materials ◽  
Pd Catalyst ◽  
Acetylene Hydrogenation ◽  
2D Layered Materials ◽  
Selective Hydrogenation Of Acetylene ◽  
Metal Atoms ◽  
C And N

To exploit the excellent properties of g-C3N4, more and more studies have been carried out in various fields in recent years to improve the selectivity of catalysts, especially for selective acetylene hydrogenation. To our best knowledge, Pd catalyst is of great importance to hydrogenate acetylene in ethylene feed. Though we have explored the hydrogenation of acetylene catalyzed by Pd1/g-C3N4 before, doping with non-metals has never been studied. In this work, the mechanisms of selective hydrogenation of acetylene to ethylene on S-doped Pd1/g-C3N4 were investigated and we also compared this result with undoped Pd1/g-C3N4. By comparing the activation energy and selectivity of undoped Pd1/g-C3N4 with those of S-doped C and N sites of Pd1/g-C3N4, we found that S-doped C sites can improve the reactivity, but with a poor selectivity, while the activity of S atom doped N sites was not improved, but the selectivity has improved. Our work provides significant insights to explore the development of high efficiency non-metallic doping single metal atoms supported on 2D layered materials.

scholarly journals Selective Hydrogenation of Acetylene to Ethylene over Bimetallic Catalysts

2019 ◽  
Vol 58 (45) ◽  
pp. 20620-20629 ◽  
Author(s):  
Qingyuan Li ◽  
Yuxin Wang ◽  
George Skoptsov ◽  
Jianli Hu
Keyword(s):  
Selective Hydrogenation ◽  
Bimetallic Catalysts ◽  
Selective Hydrogenation Of Acetylene
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