Selective Hydrogenation of Trace Acetylene in Ethylene Over Pd-Cu Alumina Catalysts
Title | Selective Hydrogenation of Trace Acetylene in Ethylene Over Pd-Cu Alumina Catalysts PDF eBook |
Author | Vinayan Nair |
Publisher | |
Pages | 404 |
Release | 1983 |
Genre | Acetylene |
ISBN |
The Selective Hydrogenation of Acetylene Over Pd and Pd-Cu on Alumina Catalysts
Title | The Selective Hydrogenation of Acetylene Over Pd and Pd-Cu on Alumina Catalysts PDF eBook |
Author | Stephen Claude LeViness |
Publisher | |
Pages | 500 |
Release | 1984 |
Genre | Acetylene |
ISBN |
Selective Hydrogenation of Acetylene in the Presence of Ethylene Over Supported Pd and Pd-Mg Catalysts
Title | Selective Hydrogenation of Acetylene in the Presence of Ethylene Over Supported Pd and Pd-Mg Catalysts PDF eBook |
Author | Ying Ji |
Publisher | |
Pages | 94 |
Release | 2009 |
Genre | Acetylene |
ISBN |
Catalytic and Process Study of the Selective Hydrogenation of Acetylene and 1,3-Butadiene
Title | Catalytic and Process Study of the Selective Hydrogenation of Acetylene and 1,3-Butadiene PDF eBook |
Author | Ruijun Hou |
Publisher | Springer |
Pages | 151 |
Release | 2017-01-05 |
Genre | Science |
ISBN | 981100773X |
This thesis offers novel methods for catalyst and process design for the selective hydrogenation of acetylene and 1,3-butadiene. The author predicts the properties of supported Pd–Ni bimetallic catalysts using density functional theory (DFT) calculations and temperature-programmed desorption (TPD). The excellent correlation between model surfaces and supported catalysts demonstrates the feasibility of designing effective bimetallic catalysts for selective hydrogenation reactions. The author also proposes a method for designing non-precious metal catalysts to replace precious metals. She modifies the process of selective hydrogenation of acetylene by coupling the selective adsorption to the selective hydrogenation in the liquid phase, as a result of which the ethylene selectivity is greatly improved and heat transfer is greatly enhanced. Lastly, by analyzing the mechanism of liquid-phase hydrogenation, the author proposes a multi-stage slurry bed reactor for industrial applications.“/p>
Selective Gas-phase Hydrogenation of Acetylene Into Ethylene in the Presence of Copper Catalysts Deposited on Alumina, Magnesia and Silica
Title | Selective Gas-phase Hydrogenation of Acetylene Into Ethylene in the Presence of Copper Catalysts Deposited on Alumina, Magnesia and Silica PDF eBook |
Author | M. B. Taghavi |
Publisher | |
Pages | 20 |
Release | 1978 |
Genre | |
ISBN |
Investigation of Pd-ceria Catalysts for Selective Hydrogenation of Acetylene in Ethylene
Title | Investigation of Pd-ceria Catalysts for Selective Hydrogenation of Acetylene in Ethylene PDF eBook |
Author | Wentao Xie |
Publisher | |
Pages | 124 |
Release | 2017 |
Genre | Chemical engineering |
ISBN |
Selective Hydrogenation of Acetylene Over Pd, Au, and PdAu Supported Nanoparticles
Title | Selective Hydrogenation of Acetylene Over Pd, Au, and PdAu Supported Nanoparticles PDF eBook |
Author | Michael Walker |
Publisher | |
Pages | |
Release | 2013 |
Genre | University of Ottawa theses |
ISBN |
The removal of trace amounts of acetylene in ethylene streams is a high-volume industrial process that must possess high selectivity of alkyne hydrogenation over hydrogenation of alkenes. Current technology uses metallic nanoparticles, typically palladium or platinum, for acetylene removal. However, problems arise due to the deactivation of the catalysts at high temperatures as well as low selectivities at high conversions. Pore expanded MCM-41 is synthesized via a two-step strategy in which MCM-41 was prepared via cetyltrimethylammonium bromide (CTMABr) followed by the hydrothermal treatment with N,N-dimethyldecylamine (DMDA). This material was washed with ethanol to remove DMDA, or calcined to remove both surfactants. PE-MCM-41 based materials were impregnated with palladium, gold, and palladium-gold nanoparticles. The removal of DMDA had an effect on both the conversion and selectivity, in which they were found to drop significantly. However, by using the bimetallic PdAu catalysts, higher selectivity could be achieved due to increased electron density.