Preparation and investigation of Pd doped Cu catalysts for selective hydrogenation of acetylene

Preparation and investigation of Pd doped Cu catalysts for selective hydrogenation of acetylene

A series of PdCu bimetallic catalysts with low Cu and Pd loadings and different Cu: Pd atomic ratios were prepared by conventionally sequential impregnation (CSI) and modified sequential impregnation (MSI) of Cu and Pd for selective hydrogenation of acetylene. Characterization indicates that the sup...

Full description

Saved in:
Bibliographic Details
Published in:Frontiers of chemical science and engineering Vol. 14; no. 4; pp. 522 - 533
Main Authors: Cao, Xinxiang, Lyu, Tengteng, Xie, Wentao, Mirjalili, Arash, Bradicich, Adelaide, Huitema, Ricky, Jang, Ben W.-L., Keum, Jong K., More, Karren, Liu, Changjun, Yan, Xiaoliang
Format: Journal Article
Language:English
Published: Beijing Higher Education Press 01-08-2020
Springer Nature B.V
Subjects:
Acetylene
Bimetals
Catalysis
Catalysts
Chemistry
Chemistry and Materials Science
Copper
Hydrogen storage
Hydrogenation
Impregnation
Industrial Chemistry/Chemical Engineering
Metal particles
Nanotechnology
Palladium
Research Article
Selectivity
Surface layers
copper
palladium
selective hydrogenation
acetylene
catalysts
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A series of PdCu bimetallic catalysts with low Cu and Pd loadings and different Cu: Pd atomic ratios were prepared by conventionally sequential impregnation (CSI) and modified sequential impregnation (MSI) of Cu and Pd for selective hydrogenation of acetylene. Characterization indicates that the supported copper (II) nitrate in the PdCu bimetallic catalysts prepared by MSI can be directly reduced to Cu metal particles due to the hydrogen spillover from Pd to Cu(NO 3 ) 2 crystals. In addition, for the catalysts prepared by MSI, Pd atoms can form PdCu alloy on the surface of metal particles, however, for the catalysts prepared by CSI, Pd tends to migrate and exist below the surface layer of Cu. Reaction results indicate that compared with CSI, the MSI method enables samples to possess preferable stability as well as comparable reaction activity. This should be due to the MSI method in favor of the formation of PdCu alloy on the surface of metal particles. Moreover, even Pd loading is super low, < 0.045 wt-% in this study, by through adjusting Cu loading to an appropriate value, attractive reactivity and selectivity still can be achieved.
ISSN:2095-0179
2095-0187
DOI:10.1007/s11705-019-1822-3