A study on the selective hydrogenation of 1,3-butadiene over Pd-Li/SiO2 catalysts

M. Kang, M. W. Song, J. H. Kim, C. H. Lee, K. L. Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Lithium addition to Pd supported on silica markedly improves the 1-butene selectivity and activity for hydrogenation of 1,3-butadiene without isomerization and over-hydrogenation of the 1-butene. The activity of 1,3-butadiene in hydrogenation increased linearly with lithium loading. This behavior indicates that there is not a physical blockage of the surface active sites. These results are in good agreement with XPS results that the addition of lithium aided Pd particles to be the metallic state as active site. The addition of lithium greatly improves 1-butene selectivity till a certain level, but over which it decreased and trans-2-butene increased due to isomerization. The ratio of trans- and cis-2-butene from the result of hydrogenation of 1-butene was about 2:1, i.e., 1-butene favored the trans isomer. Therefore, it was reasonably assumed that the increase in 1-butene selectivity was reflected in an decrease in the trans-2-butene selectivity. From NH3-TPD it is suggested that the addition of lithium affects the adsorption of reactant and product and consequently 1-butene selectivity. 1-Butene selectivity results also indicated there is an optimum value creating a better environment for the desorption of 1-butene without isomerization at a certain level of the lithium loading.

Original languageEnglish
Pages (from-to)261-268
Number of pages8
JournalJournal of the Chinese Institute of Chemical Engineers
Volume31
Issue number3
Publication statusPublished - 2000 May 1

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Butadiene
Butenes
Hydrogenation
Lithium
Catalysts
Isomerization
Thermodynamic properties
1,3-butadiene
1-butene
Temperature programmed desorption
Silicon Dioxide
Isomers
Desorption
X ray photoelectron spectroscopy
Adsorption
Silica

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

Cite this

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title = "A study on the selective hydrogenation of 1,3-butadiene over Pd-Li/SiO2 catalysts",
abstract = "Lithium addition to Pd supported on silica markedly improves the 1-butene selectivity and activity for hydrogenation of 1,3-butadiene without isomerization and over-hydrogenation of the 1-butene. The activity of 1,3-butadiene in hydrogenation increased linearly with lithium loading. This behavior indicates that there is not a physical blockage of the surface active sites. These results are in good agreement with XPS results that the addition of lithium aided Pd particles to be the metallic state as active site. The addition of lithium greatly improves 1-butene selectivity till a certain level, but over which it decreased and trans-2-butene increased due to isomerization. The ratio of trans- and cis-2-butene from the result of hydrogenation of 1-butene was about 2:1, i.e., 1-butene favored the trans isomer. Therefore, it was reasonably assumed that the increase in 1-butene selectivity was reflected in an decrease in the trans-2-butene selectivity. From NH3-TPD it is suggested that the addition of lithium affects the adsorption of reactant and product and consequently 1-butene selectivity. 1-Butene selectivity results also indicated there is an optimum value creating a better environment for the desorption of 1-butene without isomerization at a certain level of the lithium loading.",
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A study on the selective hydrogenation of 1,3-butadiene over Pd-Li/SiO2 catalysts. / Kang, M.; Song, M. W.; Kim, J. H.; Lee, C. H.; Kim, K. L.

In: Journal of the Chinese Institute of Chemical Engineers, Vol. 31, No. 3, 01.05.2000, p. 261-268.

Research output: Contribution to journalArticle

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T1 - A study on the selective hydrogenation of 1,3-butadiene over Pd-Li/SiO2 catalysts

AU - Kang, M.

AU - Song, M. W.

AU - Kim, J. H.

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AU - Kim, K. L.

PY - 2000/5/1

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AB - Lithium addition to Pd supported on silica markedly improves the 1-butene selectivity and activity for hydrogenation of 1,3-butadiene without isomerization and over-hydrogenation of the 1-butene. The activity of 1,3-butadiene in hydrogenation increased linearly with lithium loading. This behavior indicates that there is not a physical blockage of the surface active sites. These results are in good agreement with XPS results that the addition of lithium aided Pd particles to be the metallic state as active site. The addition of lithium greatly improves 1-butene selectivity till a certain level, but over which it decreased and trans-2-butene increased due to isomerization. The ratio of trans- and cis-2-butene from the result of hydrogenation of 1-butene was about 2:1, i.e., 1-butene favored the trans isomer. Therefore, it was reasonably assumed that the increase in 1-butene selectivity was reflected in an decrease in the trans-2-butene selectivity. From NH3-TPD it is suggested that the addition of lithium affects the adsorption of reactant and product and consequently 1-butene selectivity. 1-Butene selectivity results also indicated there is an optimum value creating a better environment for the desorption of 1-butene without isomerization at a certain level of the lithium loading.

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