Direct Hydrogenation and Hydrotreating of Neat Vegetal Oil into Renewable Diesel Using Alumina Binder with Zeolite

Abstract

Hydrodeoxygenation of vegetal oil and methyl oleate studied using Pt and Pd supported with alumina-beta-zeolite (a-Al2O3-H-a) and comparing its performance with NiMo/a-Al2O3 and Pd/C in a semi-batch reactor, at 300 - 340 oC and 2.0 MPa. This study has used Pd and Pt on H-a zeolites with alumina binder as extrudate and it examines over triglycerides hydrogenolysis. Pd/C showed higher rate of deoxygenation and the selectivity of C18/C17 was higher for NiMo-S/a-Al2O3 and PdPt/a-Al2O3-H-a. PdPt/a-Al2O3-H-a enhanced the hydrogenation and hydrogenolysis, while conversion and yield in deoxygenation and decomposition has reached identicical performance as NiMo-S/a-Al2O3 catalytic deoxygenation process. Both the thermal decomposition and the hydrogenation of unsaturated triglycerides were mainly affected by H2 partial pressure. Transition metals like Pd and Pt on H-a and alumina binder ratio of 40:60 wt% showed effective hydrodeoxygenation of vegetal oil without substituting sulfur feed.

Indigenous Materials as Catalyst Supports for Renewable Diesel Production in Malaysia

“…As hydroisomerization requires a bifunctional catalyst, the β-zeolites are chosen based on their good balance between acid and metal functions, and Al 2 O 3 is used as a binder where the amount of zeolite influences the ratio of acid/hydrogenation activity [128]. It was reported that the optimum ratio of H-β zeolites and γ-Al 2 O 3 binder was 40:60 wt% in the hydrodeoxygenation of vegetal oil without sulfur feed substitution using Pd and Pt as catalyst [129]. Although the deoxygenation rate was better using Pd/AC, Pt-Pd/γ-Al 2 O 3 -H-β zeolites boosted the activity of hydrogenolysis and hydrogenation with the H 2 partial pressure as the key parameter for thermal decomposition of unsaturated triglycerides.…”

Hydro-treating and Hydro-isomerisation of Sunflower Oil using Pt/SAPO-11: Influence of Templates in Ultrasonic Assisted with Hydrothermal Synthesis

“…The HDO of sunflower oil contains unsaturated double bonds of triolein, trilinolein, tripalmitin, and tristearin triglycerides in the sunflower oil. These higher level unsaturated triglycerides demand higher consumption of hydrogen on hydrotreatment i.e., HDO pathway [35][36][37][38][39][40].…”