Chemical looping reforming of waste cooking oil in packed bed reactor.
Chemical looping steam reforming for hydrogen production from waste cooking oil was investigated using a packed bed reactor. The steam to carbon ratio of 4 and temperatures between 600 and 700 degrees C yielded the best results of the range of conditions tested. Six cycles at two weighted hourly space velocities (WHSV of 2.64 and 5.28 h(-1)) yielded high (>0.74) and low (<0.2) oil conversion fractions, respectively, representing low and high coking conditions. The WHSV of 2.64 h(-1) yielded product concentrations closest to equilibrium values calculated assuming a fresh rapeseed oil composition. Repeated cycling revealed some output oscillations in reactant conversion and in the extent of Ni-NiO conversion, but did not exhibit deterioration by the 6th cycle. The selectivity of CO, CO(2) and CH(4) were remarkably constant over the performed cycles, resulting in a repeatable syngas composition with H(2) selectivity very close to the optimum.
Pimenidou
P
P
Energy and Resources Research Institute, The University of Leeds, Leeds, UK.
Rickett
G
G
Dupont
V
V
Twigg
M V
MV
D002245:Carbon Dioxide / Q000737:chemistry; D002248:Carbon Monoxide / Q000737:chemistry; D003296:Cooking; D006859:Hydrogen / Q000737:chemistry; D007554:Isotopes; D008697:Methane / Q000737:chemistry; D009532:Nickel / Q000737:chemistry; D009821:Oils
D007554:Isotopes; D009821:Oils; D002245:Carbon Dioxide; D009532:Nickel; D002248:Carbon Monoxide; D006859:Hydrogen; D008697:Methane