Development of 2-Ethyl-2-Hexenal Hydrogenation Tin-Nickel Based Catalyst for 2-Ethyl Hexanol Production by Hydrothermal Impregnation

• Main Author: Najibah, Malikah
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/38510
• Institution: Institut Teknologi Bandung

2-ethylhexanol (2-EH) compound is a saturated alcohol compound that is widely used in the petrochemical and polymer industries. In making 2-EH there is 2-ethyl-2-hexenal (EPA) catalytic hydrogenation through 2-ethylhexanal to 2-EH. In this study, the hydrogenation reaction of EPA was studied to produce 2-EH using nickel-based catalyst (Ni). The catalyst synthesis used the method of precipitation with Ni source in the form of nickel (II) nitrate hexahydrate (Ni (NO3) 2.6H2O). The catalyst that has been developed is nickel / alumina with a metal content of 50% -b with a buffer consisting of AlO (OH) (catapult) and SiO2 (Cab-O-Sil) which are varied with the addition of tin (Sn) promoters with variations in the Ni mol ratio -Sn in the catalyst is 8.5; 10.5; 12.5 and 20. Variations in the addition of promoters are carried out by the hydrothermal method on the catalyst that has been formed by the sol-gel method and vice versa. The catalyst activity test for the hydrogenation reaction of EPA to 2-EH was carried out in the partisan reactor for 10 hours at a temperature of 120 ° C and a pressure of 30 bar. The reaction mixture was observed every 1 hour and the composition was analyzed using gas chromatography with the FID type detector and RTX-5 column. The results of this study obtained the best synthesis catalyst performance is a catalyst with a Ni- Sn 8.5 ratio by the synthesis method namely hydrothermal after the supported catalyst is formed. The results of performance testing showed that the addition of Sn promoter metal gave an increase in conversion performance from 93.10% to 99.22% and selectivity from 72.73% to 75.95% against commercial catalysts. When compared with the catalyst without the addition of Sn, there was an increase in performance and an increase in the catalyst age from 7 hours to 9 hours against the catalyst without the addition of Sn.