การศึกษาเชิงเปรียบเทียบของการแตกตัวเชิงเร่งปฏิกิริยาของไขมันวัวบนแมกนีเซียมออกไซด์และโดโลไมต์ที่ผสมด้วยถ่านกัมมันต์ / ภัทราพร พรหมทันต์ = Comparative study of beef tallow catalytic cracking on magnesium oxide and dolomite mixed with activated carbon / Pattaraporn Prommatun
The main objective of this research focused on a comparative study of the catalytic cracking on MgO, a mixture of MgO and activated carbon at 1:1 ratio, and a mixture of dolomite and activated carbon at 1:1 ratio. Variables consisted of the temperatures at 380 to 440 oC, time of reactivity ranging from 30 to 75 minutes, initial hydrogen pressure at without presence of hydrogen pressure to 5 bars, and the amount of the foregoing catalysts at 0 to 5 wt%. The results show that without presence of catalysts (Thermal Cracking) is 440 oC, time of reactivity is 45 minute, initial hydrogen pressure is 1 bar ; with MgO, a mixture of MgO and activated carbon at 1:1 ratio and a mixture of dolomite and activated carbon at 1:1 ratio is 420 oC, time of reactivity is 45 minute, initial hydrogen pressure is 1 bar, the amount of the MgO, MgO and activated carbon at 1:1 ratio catalysts at 2.5 wt%. and the amount of the dolomite and activated carbon at 1:1 ratio 5 wt%. An analysis of liquid fuel component with Distillation Gas Chromatography (DGC) found that the percentage of residual oil is at 29.89 wt%, 24.69 wt%, 23.91 wt%, and 18.64 wt% respectively. When a catalyst is introduced, the reactivity temperature decreases by 20 oC. Liquid fuels processed with catalytic cracking promotes decarboxylation and decarbonylation resulting in a decrease in oxygen component to only 3.75 wt%, compared to that of beef tallow at 23.03 wt%. A high oxygen component in beef tallow contributes to its fuel properties of 39.87 MJ/kg, lower than the liquid fuel processed with catalytic cracking which offers 49.32 MJ/kg.