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Properties of Pd/SiO2 catalyst doubly promoted with La oxide and Si for acetylene hydrogenation

Paper ID Volume ID Publish Year Pages File Format Full-Text
50601 46804 2012 4 PDF Available
Title
Properties of Pd/SiO2 catalyst doubly promoted with La oxide and Si for acetylene hydrogenation
Abstract

Pd/SiO2 for acetylene hydrogenation was doubly promoted with La oxide and Si, the latter being selectively deposited on Pd instead of on SiO2. La oxide promoted the ethylene selectivity of the catalyst due to its strong interaction with Pd after the catalyst had been reduced at high temperature, e.g., 500 °C, and Si prevented the migration of La oxide in the catalyst when the reduced catalyst was exposed to air. Consequently, the doubly promoted catalyst showed high ethylene selectivity comparable to that of 500 °C-reduced Pd–La/SiO2 even when the catalyst had been oxidized and subsequently reduced at low temperature, e.g., 300 °C.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Si was added to La oxide-promoted Pd/SiO2 as an anchor promoter. ► Added Si effectively suppressed La oxide migration during oxidation. ► Added Si preserved enhanced performance of the high-temperature reduced Pd-La/SiO2. ► Pd-La-Si/SiO2 showed high ethylene selectivity even after low-temperature reduction.

Keywords
Acetylene hydrogenation; Pd; La oxide; Si; Anchor
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Properties of Pd/SiO2 catalyst doubly promoted with La oxide and Si for acetylene hydrogenation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 24, 5 July 2012, Pages 52–55
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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