Selective Hydrogenation of Stearic Acid to 1-Octadecanol Using Bimetallic Palladium-Tin Supported on Carbon Catalysts at Mild Reaction Conditions

• Published in: Bulletin of chemical reaction engineering & catalysis Vol. 16; no. 4; pp. 888 - 903
• Main Authors: Rodiansono, Rodiansono, Hayati, Elisa, Azzahra, Atina Sabila, Astuti, Maria Dewi, Mustikasari, Kamilia, Husain, Sadang, Sutomo, Sutomo
• Format: Journal Article
• Language: English
• Published: Semarang Department of Chemical Engineering, Diponegoro University 01.12.2021; Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)
• Subjects: 1-octadecanol; Alcohols; bimetallic pd-sn catalyst; Bimetals; Carbon; Catalysts; Chemical synthesis; Hydrogenation; Palladium; Reaction time; Selectivity; Stearic acid; Tin; Tin base alloys
• ISSN: 1978-2993; 1978-2993
• DOI: 10.9767/bcrec.16.4.11895.888-903

Bimetallic palladium-tin catalysts supported on microporous carbon (denoted as Pd-Sn(x)/C, loading amount of Pd = 5 wt% and x = Pd/Sn molar ratio; c.a. 3.0; 1.5; and 1.0) showed high selectivity in the hydrogenation of stearic acid towards 1-octadecanol (stearyl alcohol) under mild reaction conditions. Pd-Sn(x)/C catalysts were synthesized via the hydrothermal method at temperature of 150 °C for 24 h, and reduced with H2 at 400 °C for 3 h. Pd-Sn(1.5)/C catalyst exhibited the highest yield of stearyl alcohol (1-octadecanol) (up to 73.2%) at 100% conversion of stearic acid at temperature 240 °C, initial H2 pressure of 3.0 MPa, a reaction time of 13 h, and in 2-propanol/water solvent. The high selectivity of alcohols over Pd-Sn(1.5)/C catalyst can be attributed to the formation of bimetallic Pd-Sn alloy phases (e.g. Pd3Sn and Pd3Sn2) as obviously depicted by XRD analysis. The presence of co-promotor Sn and the formation of bimetallic may play a pivotal role in the high selectivity of 1-octadecanol. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).