Mesoporous Silica Gel Doped with Dysprosium, Lanthanum and Modified with Silver as a Catalyst for Selective Hydrogenation of a 1-Heptyne/1-Heptene Mixture.

Autor: Tokranov, A. A., Tokranova, E. O., Shafigulin, R. V., Pavlova, L. V., Platonov, I. A., Bulanova, A. V.
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Zdroj: Catalysis Letters; Apr2024, Vol. 154 Issue 4, p1684-1693, 10p
Abstrakt: Mesoporous silica gel doped with dysprosium, lanthanum and modified with silver (Dy-Ag/MPS, La-Ag/MPS) was obtained by the template method. The physicochemical characteristics of the obtained catalyst were studied by scanning electron microscopy, X-ray fluorescence and X-ray diffraction analysis, inductively coupled plasma mass spectrometry and temperature-programmed reduction. In addition, the possibility of using obtained materials as an efficient and selective catalysts in the hydrogenation of a 1-heptyne/1-heptene mixture (with 30% of alkyne content) in a temperature range of 140–160 °C and a hydrogen pressure of 3 atm was studied. It was found that after 15 min from the start of the hydrogenation reaction at 140 °C on the La-Ag/MPS catalyst, total conversion of 1-heptyne was observed and selectivity for 1-heptene was 84%. Moreover, it was shown that on a Dy-Ag/MPS at 150 °C 1-heptyne conversion was 84%, the selectivity for alkene was 79%. Furthermore, with an increase in temperature to 160 °C, the conversion of 1-heptyne reaches 95%, the selectivity for 1-heptene—84%. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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