HYDROGENATION OF 1,3-BUTADIENE OVER CATALYSTS PREPARED FROM AMORPHOUSPD2NI50NB48 RIBBON - EFFECT OF SELF-POISONING ON COMPETITIVE ADSORPTION

Authors
SARKANY A SCHAY Z STEFLER G BORKO L HIGHTOWER JW GUCZI L
Citation
A. Sarkany et al., HYDROGENATION OF 1,3-BUTADIENE OVER CATALYSTS PREPARED FROM AMORPHOUSPD2NI50NB48 RIBBON - EFFECT OF SELF-POISONING ON COMPETITIVE ADSORPTION, Applied catalysis. A, General, 124(2), 1995, pp. 181-187
Citations number
35
Categorie Soggetti
Chemistry Physical","Environmental Sciences
Journal title
Applied catalysis. A, General → ACNP
ISSN journal
0926860X
Volume
124
Issue
2
Year of publication
1995
Pages
181 - 187
Database
ISI
SICI code
0926-860X(1995)124:2<181:HO1OCP>2.0.ZU;2-X
Abstract
Hydrogenation of 1,3-butadiene was investigated on catalysts prepared from an amorphous ribbon of composition Pd2Ni50Nb48, activated by oxyg en and hydrogen treatments at 683 K. The hydrogenation activity of the sample decreased gradually with time, indicating formation of carbona ceous materials (oligomers). As a consequence of oligomer formation th e butene selectivity remained constant even at 100% butadiene conversi on. Apparently n-butenes could not compete with oligomers. Restart exp eriments confirmed that diene, due to its high strength of complexatio n, is able to adsorb on metallic sites in the presence of oligomers. T he results emphasize the role of oligomers in selective semihydrogenat ions.