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Hydrotreating of waste cooking oil for biodiesel production. Part II: Effect of temperature on hydrocarbon composition
- Bezergianni, Stella, Dimitriadis, Athanasios, Sfetsas, Themistoklis, Kalogianni, Aggeliki
- Bioresource technology 2010 v.101 no.19 pp. 7658-7660
- biodiesel, catalysts, cooking fats and oils, feedstocks, gases, hydrocarbons, isomerization, qualitative analysis, quantitative analysis, temperature
- This study focuses on the use of waste cooking oil (WCO) as the main feedstock for hydrotreatment to evaluate the effect of temperature on the product hydrocarbon composition. A qualitative analysis was initially performed using a GC×GC-TOFMS indicating the presence of mainly paraffins of the C15-C18 range. A quantitative analysis was also performed via a GC-FID, which gave both n-paraffins and iso-paraffins in the range of C8-C29. The results indicate that hydrotreating temperature favors isomerization reactions as the amount of n-paraffins decreases while the amount of iso-paraffins increases. For all experiments the same commercial hydrotreating catalyst was utilized, while the remaining operating parameters were constant (pressure=1200psig, LHSV=1.0h⁻¹, H₂/oil ratio=4000scfb, liquid feed=0.33ml/min, and gas feed=0.4scfh).