An alumina-coated, egg-shell Pd/α-Al2O3@SiC catalyst with enhanced ethylene selectivity in the selective hydrogenation of acetylene

RSC Advances ◽  
2016 ◽  
Vol 6 (62) ◽  
pp. 57174-57182 ◽  
Author(s):  
Huoli Zhang ◽  
Jianliang Cao ◽  
Baojun Wu ◽  
Wei Dai ◽  
Zehua Chen ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Complete Removal ◽  
Selective Hydrogenation Of Acetylene ◽  
Ethylene Selectivity ◽  
Egg Shell ◽  
Α Al2o3

The Pd–Ag/α-Al2O3@SiC catalyst showed higher ethylene selectivity than a Pd–Ag/α-Al2O3 catalyst when achieving complete removal of acetylene in an ethylene-rich stream.

Selective hydrogenation of acetylene over Pd catalysts supported on nanocrystalline α-Al2O3 and Zn-modified α-Al2O3

2008 ◽  
Vol 9 (14) ◽  
pp. 2297-2302 ◽  
Author(s):  
Suthana Chinayon ◽  
Okorn Mekasuwandumrong ◽  
Piyasan Praserthdam ◽  
Joongjai Panpranot
Keyword(s):  
Selective Hydrogenation ◽  
Pd Catalysts ◽  
Selective Hydrogenation Of Acetylene ◽  
Α Al2o3

TiO2-modified nano-egg-shell Pd catalyst for selective hydrogenation of acetylene

Particuology ◽  
2010 ◽  
Vol 8 (3) ◽  
pp. 251-256 ◽  
Author(s):  
Jin Gao ◽  
Qiufeng Zhu ◽  
Lixiong Wen ◽  
Jianfeng Chen
Keyword(s):  
Selective Hydrogenation ◽  
Pd Catalyst ◽  
Selective Hydrogenation Of Acetylene ◽  
Egg Shell

Performance of Pd catalysts supported on nanocrystalline α-Al2O3 and Ni-modified α-Al2O3 in selective hydrogenation of acetylene

2008 ◽  
Vol 131 (1-4) ◽  
pp. 553-558 ◽  
Author(s):  
Nitikon Wongwaranon ◽  
Okorn Mekasuwandumrong ◽  
Piyasan Praserthdam ◽  
Joongjai Panpranot
Keyword(s):  
Selective Hydrogenation ◽  
Pd Catalysts ◽  
Selective Hydrogenation Of Acetylene ◽  
Α Al2o3

Selective Hydrogenation of Acetylene to Ethylene Over Nanosized Gold and Palladium Supported Catalysts

2020 ◽  
Vol 20 (9) ◽  
pp. 5800-5803 ◽  
Author(s):  
Gyeongmin Lee ◽  
Woon-Jo Jeong ◽  
Ho-Geun Ahn
Keyword(s):  
Selective Hydrogenation ◽  
Supported Catalysts ◽  
Fixed Bed ◽  
Raw Material ◽  
Fixed Bed Reactor ◽  
Selective Hydrogenation Of Acetylene ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Polyethylene Production ◽  
Ethylene Selectivity

Ethylene, the main raw material for polyethylene production, is a by-product produced by thermally decomposing naphtha and it contains a small amount of acetylene. The acetylene reacts as a permanent catalyst poison for the ethylene polymerization catalyst. In this study, we wanted to improve the acetylene conversion and the ethylene selectivity by selective hydrogenation of acetylene for removing acetylene contained in ethylene. Catalyst was prepared by loading nanosized gold (Au) and palladium (Pd) particles on support (Al2O3, TiO2). Deposition order Au and Pd particles was changed. The activity of the catalyst was investigated using a flow-typed fixed bed reactor under atmospheric pressure. Au and Pd particles deposited on TiO2 were oxidized to Au2O3 and PdO due to strong metal support interaction (SMSI). It was considered that the Au/Pd/Al2O3 catalyst was more active than the Pd/Au/Al2O3 catalyst due to the formation of the interface between Au particles and Pd particles (or support). But Pd/Au/Al2O3 catalyst is considered to have poor activity because Pd particles cover part of the interface between Au and the support. Au/Pd/Al2O3 catalyst showed the best catalytic activity, and acetylene conversion and ethylene selectivity were 100% and about 80% at 40 °C, respectively.

An Effective Strategy to Prepare Pd–Ag/MgCO3@α-Al2O3 Catalyst for Selective Hydrogenation of Acetylene

2016 ◽  
Vol 147 (2) ◽  
pp. 483-490 ◽  
Author(s):  
Chunxia Che ◽  
Bingkai Wang ◽  
Changfu Shan ◽  
Hao Chen ◽  
Weisheng Liu ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Effective Strategy ◽  
Selective Hydrogenation Of Acetylene ◽  
Α Al2o3 ◽  
Al2o3 Catalyst

scholarly journals Highly Dispersed PdNPs/α-Al2O3 Catalyst for the Selective Hydrogenation of Acetylene Prepared with Monodispersed Pd Nanoparticles

Catalysts ◽  
2017 ◽  
Vol 7 (12) ◽  
pp. 128 ◽  
Author(s):  
Huoli Zhang ◽  
Youchao Wang ◽  
Yan Wang ◽  
Jianliang Cao ◽  
Peng Kang ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Pd Nanoparticles ◽  
Selective Hydrogenation Of Acetylene ◽  
Highly Dispersed ◽  
Α Al2o3 ◽  
Al2o3 Catalyst

scholarly journals Kinetic Study of the Selective Hydrogenation of Acetylene over Supported Palladium under Tail-End Conditions

Catalysts ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 180 ◽  
Author(s):  
Caroline Urmès ◽  
Jean-Marc Schweitzer ◽  
Amandine Cabiac ◽  
Yves Schuurman
Keyword(s):  
Selective Hydrogenation ◽  
Active Site ◽  
Reaction Conditions ◽  
Selective Hydrogenation Of Acetylene ◽  
End Conditions ◽  
Supported Palladium ◽  
Α Al2o3 ◽  
Intrinsic Kinetic ◽  
Kinetics Of ◽  
Al2o3 Catalyst

The kinetics of the selective hydrogenation of acetylene in the presence of an excess of ethylene has been studied over a 0.05 wt. % Pd/α-Al2O3 catalyst. The experimental reaction conditions were chosen to operate under intrinsic kinetic conditions, free from heat and mass transfer limitations. The data could be described adequately by a Langmuir–Hinshelwood rate-equation based on a series of sequential hydrogen additions according to the Horiuti–Polanyi mechanism. The mechanism involves a single active site on which both the conversion of acetylene and ethylene take place.

Effect of N2O pretreatment on fresh and regenerated Pd-Ag/α-Al2O3 catalysts during selective hydrogenation of acetylene

2007 ◽  
Vol 91 (2) ◽  
pp. 195-202 ◽  
Author(s):  
Joongjai Panpranot ◽  
Songphol Aungkapipattanachai ◽  
Thanapon Sangvanich ◽  
Pawin Boonyaporn ◽  
Piyasan Praserthdam
Keyword(s):  
Selective Hydrogenation ◽  
Selective Hydrogenation Of Acetylene ◽  
Α Al2o3
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