(45c) Novel High Stability Hydrogen Production from Ethanol Steam Reforming Over Catalyst of Nano-NiO Particles Based on Flowerlike CeO2 Microspheres for EH Hybrid Vehicle Application

Ethanol is renewable, safe and non-toxic as well as environmentally friendly that it will to be one of the replacers of gasolene to vehicles in China. That ethanol-H and petrolic hybrid vehicle (EHV) was a kind of vehicel to use the waste heat from vent-pipe to reform ethanol water mixture to produce H2, CH4 and CO by a micro-ethanol steam reformer which was setted in the vent- pipe to promote the combustion of gasolene and to decrease the use of gasolene obviously (about 30 vol.%). So, EHV could be a transitional products before the industrialization of fuel cell and pure H2 engine vehicles in China.

Catalysts of nickle oxide based on flowerlike ceria microspheres with high disperse and stable structure were made by hydrothermal method to achieve simultaneous dehydrogenation of ethanol and water molecules on multi-active sites. This special morphology catalyst represented novel stability more than 2000 hours with H2 average selectivity value of 70mol.%, and >99.9% ethanol conversion from low temperature (350oC) ethanol steam re-reforming, Which were very good for the EHV application. And the discontinuous stability test with 15 times restarts was more than 600 hours. Catalytic parameters with respect to activitry, selectivity towards hydrogen production and stability with time on stream were determined and optimized. Apparent reaction mechanisms were investigated using transient (TPD) techniques.

Key words: Hydrogen production, high stability, ethanol steam reforming, EHV.