title: Hydrotreating of waste cooking oil for biodiesel production. Part II: effect of temperature on hydrocarbon composition.
abstract: 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 x 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=1200 psig, LHSV=1.0 h(-1), H(2)/oil ratio=4000 scfb, liquid feed=0.33 ml/min, and gas feed=0.4 scfh).
authors.affiliation: Center for Research and Technology Hellas-CERTH, Chemical Process Engineering Research Institute-CPERI, Thermi-Thessaloniki, Greece. sbezerg@cperi.certh.gr
authors.forename: Stella
authors.initials: S
authors.lastname: Bezergianni
authors.forename: Athanasios
authors.initials: A
authors.lastname: Dimitriadis
authors.forename: Themistoklis
authors.initials: T
authors.lastname: Sfetsas
authors.forename: Aggeliki
authors.initials: A
authors.lastname: Kalogianni
mesh_terms: D056804:Biofuels; D019149:Bioreactors; D003296:Cooking; D009821:Oils / Q000737:chemistry*; D010232:Paraffin / Q000032:analysis*; D013696:Temperature; D014866:Waste Products / Q000032:analysis*; D014867:Water / Q000737:chemistry*
chemical_list: D056804:Biofuels; D009821:Oils; D014866:Waste Products; D014867:Water; D010232:Paraffin