fulltext.study @t Gmail

Effect of N3− species on selective acetylene hydrogenation over Pd/SAC catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
53408 46968 2016 7 PDF Available
Title
Effect of N3− species on selective acetylene hydrogenation over Pd/SAC catalysts
Abstract

•NaN3 was added to Pd/SAC catalysts as Lewis base promoter.•NaN3 addition increased acetylene adsorption dramatically.•Dual function sites with N3− and Pd sites increased acetylene adsorption.•Acetylene adsorption type was critical for selective hydrogenation.

Selective hydrogenation of acetylene to ethylene is very important for removing a trace amount of acetylene from ethylene. Tuning catalyst acidity is critical for hydrogenation reaction to prevent oligomerization. In this work, NaN3 was introduced to Pd catalyst serving as Lewis base sites. NaN3-Pd/SAC catalysts with different N3− loadings (0–15 wt.%) were prepared by impregnation method and analyzed with BET, temperature-programmed reduction (TPR), Fourier-transferred Infrared (FTIR) spectroscopy, CO pulse chemisorption, temperature-programmed desorption (TPD) of hydrogen and acetylene. The results showed NaN3 covered some Pd species and increased the reduction temperatures of catalysts. Also NaN3 addition decreased the catalyst surface areas due to blocking some pores on the support. N3− on the catalysts lowered hydrogen adsorption capacity but showed superior adsorption capability for acetylene, the selectivity and conversion of the acetylene hydrogenation was negatively affected by N3− species under the current operation conditions. The amount of the adsorbed hydrogen and the types of acetylene adsorption played important roles for the hydrogenation reaction. This work provides insights on how to prepare an effective catalyst for removing acetylene impurity from ethylene.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (204 K)Download as PowerPoint slide

Keywords
Selective acetylene hydrogenation; NaN3; Lewis base; Dual functional sites; Pd/SAC
First Page Preview
Effect of N3− species on selective acetylene hydrogenation over Pd/SAC catalysts
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 263, 1 April 2016, Pages 98–104
Authors
, ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us