จำนวน Repository ( 2 )
Development of hydrogen producing inoculum from cow dung for hydrogen production from food waste
The aim of this research was to develop a process for making an inoculum from cow dung. Consequently the inoculum together with food waste was employed to produce hydrogen gas. A total of four different inoculums were experimented including 1). Fresh inoculum 2). Autoclaved inoculum 3). Natural dried inoculum and 4). Hot air dried inoculum. The experimental results revealed that the autoclaved inoculum is the most effective in terms of producing a volatile fatty acid in a maximum value of 9.55 g/l. In addition a maximum hydrogen gas of 136.46 ml/g (of sugar) and also having an average pH of 4.85 and the sugar concentration of 0.33 g/l could be obtained. Furthermore it was found that creating an inoculum by using the autoclaved inoculum produces an inoculum powder having a concentration of 20%. This suggests that the autoclaved inoculum is the best in terms of producing the hydrogen gas from using food waste is 35 litre/litre (of food waste).
Dry reforming of methane reaction for hydrogen and syngas production using cobalt catalysts and nickel-cobalt bimetallic catalysts
The cobalt catalysts (cobalt content by weight: 7% 10% and 15%) and cobalt-nickel bimetallic catalysts (cobalt-nickel content by weight: 3.5%-3.5% 5%-5% and 7%-7%) were studied in dry reforming of methane for hydrogen and syngas production. All catalysts were synthesized by the wetness impregnation method. The dry reforming of methane was carried out at 700oC atmosphere pressure using a mixture; CH4 and CO2 in ratio 1:1. The result showed that the good activity and stability depend on metal content in catalysts and the combined 2 metals as bimetallic catalysts. The optimum amounts of catalysts are 10wt% Co for mono-metallic catalysts 75%CH4 and 75%CO2 conversion and 7wt% Ni-7wt% Co for bimetallic catalysts 87%CH4 and 89%CO2 conversion.