Selective Hydrogenation of Trace Acetylene in Ethylene Over Pd-Cu Alumina Catalysts PDF Download
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Author: Vinayan Nair
Publisher:
ISBN:
Category : Acetylene
Languages : en
Pages : 404
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Author: Vinayan Nair
Publisher:
ISBN:
Category : Acetylene
Languages : en
Pages : 404
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Author: Stephen Claude LeViness
Publisher:
ISBN:
Category : Acetylene
Languages : en
Pages : 500
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Author: Ying Ji
Publisher:
ISBN:
Category : Acetylene
Languages : en
Pages : 94
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Author: Ruijun Hou
Publisher: Springer
ISBN: 981100773X
Category : Science
Languages : en
Pages : 151
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Book Description
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>
Author: M. B. Taghavi
Publisher:
ISBN:
Category :
Languages : en
Pages : 20
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Author: Wentao Xie
Publisher:
ISBN:
Category : Chemical engineering
Languages : en
Pages : 124
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Author: Michael Walker
Publisher:
ISBN:
Category : University of Ottawa theses
Languages : en
Pages :
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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.
Author: Walter Plante
Publisher:
ISBN:
Category : Catalyst poisoning
Languages : en
Pages : 268
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Author: Tengteng Lyu
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 128
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Author: Yeung Ho Park
Publisher:
ISBN:
Category : Acetylene
Languages : en
Pages : 410
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