Features of the Kinetics and Mechanism of Stearic Acid Decarbonylation in the Presence of a Silica Gel-Supported Nickel Sulfide Catalyst

• Published in: Petroleum chemistry Vol. 57; no. 12; pp. 1190 - 1193
• Main Authors: Katsman, E. A., Danyushevsky, V. Ya, Kuznetsov, P. S., Karpov, V. M., Al-Wadhaf, H. A., Flid, V. R.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.12.2017; Springer; Springer Nature B.V
• Subjects: Adsorption; Aluminum oxide; Analysis; Catalysis; Catalysts; Chemistry; Chemistry and Materials Science; Industrial Chemistry/Chemical Engineering; Nickel; Nickel (Metal); Nickel sulfide; Reaction kinetics; Reaction mechanisms; Reagents; Saturated fatty acids; Silica gel; Silicon dioxide; Stearic acid; Substitution reactions; Sulfides; alumina; reaction mechanism; stearic acid; adsorption complexes; active sites; decarbonylation; silica gel; nickel sulfide catalyst
• ISSN: 0965-5441; 1555-6239
• DOI: 10.1134/S0965544117060172

The substitution of silica gel for γ-Al 2 O 3 to be used as a support for a nickel sulfide catalyst for stearic acid decarbonylation leads to a significant increase in the catalyst activity and a slight improvement of the heptadecene selectivity. Comparison with the γ-Al 2 O 3 -supported catalyst has been made in terms of the kinetic model based on experimental data. An increase in the catalyst activity is attributed to a decrease in the strength of the active site–reactant adsorption complexes on the basis of the Sabatier–Balandin principle. Relationships between the features of the reaction mechanism, the acidity of the support, and the nanoparticle size of the active substance have been discussed.