Hydrogenation of 1,3-butadiene over catalysts prepared from amorphous Pd2Ni50Nb48 ribbon: Effect of self-poisoning on competitive adsorption

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Abstract

Hydrogenation of 1,3-butadiene was investigated on catalysts prepared from an amorphous ribbon of composition Pd2Ni50Nb48, activated by oxygen and hydrogen treatments at 683 K. The hydrogenation activity of the sample decreased gradually with time, indicating formation of carbonaceous materials (oligomers). As a consequence of oligomer formation the butene selectivity remained constant even at 100% butadiene conversion. Apparently n-butenes could not compete with oligomers. Restart experiments confirmed that diene, due to its high strength of complexation, is able to adsorb on metallic sites in the presence of oligomers. The results emphasize the role of oligomers in selective semihydrogenations.

Original languageEnglish
JournalApplied Catalysis A: General
Volume124
Issue number2
DOIs
Publication statusPublished - Apr 13 1995

Fingerprint

Butadiene
Oligomers
Hydrogenation
Adsorption
Catalysts
Butenes
Complexation
Hydrogen
1,3-butadiene
Oxygen
Chemical analysis
Experiments
butylene

Keywords

  • Butadiene hydrogenation
  • Butenes
  • Oligomerization
  • Palladium-nickel-niobium

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

Cite this

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title = "Hydrogenation of 1,3-butadiene over catalysts prepared from amorphous Pd2Ni50Nb48 ribbon: Effect of self-poisoning on competitive adsorption",
abstract = "Hydrogenation of 1,3-butadiene was investigated on catalysts prepared from an amorphous ribbon of composition Pd2Ni50Nb48, activated by oxygen and hydrogen treatments at 683 K. The hydrogenation activity of the sample decreased gradually with time, indicating formation of carbonaceous materials (oligomers). As a consequence of oligomer formation the butene selectivity remained constant even at 100{\%} butadiene conversion. Apparently n-butenes could not compete with oligomers. Restart experiments confirmed that diene, due to its high strength of complexation, is able to adsorb on metallic sites in the presence of oligomers. The results emphasize the role of oligomers in selective semihydrogenations.",
keywords = "Butadiene hydrogenation, Butenes, Oligomerization, Palladium-nickel-niobium",
author = "A. S{\'a}rk{\'a}ny and Z. Schay and G. Stefler and L. Bork{\'o} and Hightower, {J. W.} and L. Guczi",
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T1 - Hydrogenation of 1,3-butadiene over catalysts prepared from amorphous Pd2Ni50Nb48 ribbon

T2 - Effect of self-poisoning on competitive adsorption

AU - Sárkány, A.

AU - Schay, Z.

AU - Stefler, G.

AU - Borkó, L.

AU - Hightower, J. W.

AU - Guczi, L.

PY - 1995/4/13

Y1 - 1995/4/13

N2 - Hydrogenation of 1,3-butadiene was investigated on catalysts prepared from an amorphous ribbon of composition Pd2Ni50Nb48, activated by oxygen and hydrogen treatments at 683 K. The hydrogenation activity of the sample decreased gradually with time, indicating formation of carbonaceous materials (oligomers). As a consequence of oligomer formation the butene selectivity remained constant even at 100% butadiene conversion. Apparently n-butenes could not compete with oligomers. Restart experiments confirmed that diene, due to its high strength of complexation, is able to adsorb on metallic sites in the presence of oligomers. The results emphasize the role of oligomers in selective semihydrogenations.

AB - Hydrogenation of 1,3-butadiene was investigated on catalysts prepared from an amorphous ribbon of composition Pd2Ni50Nb48, activated by oxygen and hydrogen treatments at 683 K. The hydrogenation activity of the sample decreased gradually with time, indicating formation of carbonaceous materials (oligomers). As a consequence of oligomer formation the butene selectivity remained constant even at 100% butadiene conversion. Apparently n-butenes could not compete with oligomers. Restart experiments confirmed that diene, due to its high strength of complexation, is able to adsorb on metallic sites in the presence of oligomers. The results emphasize the role of oligomers in selective semihydrogenations.

KW - Butadiene hydrogenation

KW - Butenes

KW - Oligomerization

KW - Palladium-nickel-niobium

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