Abstract
This study processed the water vapor entrained in the NaBH4 hydrogen production reaction inside the primary hydrogen production tank through the secondary hydrogen production tank, in order to increase total hydrogen production. γ-Al2O3 was used as the carrier for the hydrolytic hydrogen production reaction in the primary hydrogen production tank. The reaction was chelated with metal catalyst Co2+ at different concentrations to produce the catalyst. Next, the adopted catalyst concentration and different catalyst bed temperatures were tested. The secondary hydrogen production tank was tested using NaBH4 powder and multiple NaBH4+ Co2+ mixed powders at different ratios. The powder was refined by ball milling with different steel ball ratios to enlarge the contact area between the water vapor and powder. The ball milling results from carriers at different concentrations, different catalyst bed temperatures, NaBH4+ Co2+ mixed powders in different ratios and different steel ball ratios were discussed as the hydrogen production rate and hydrogen production in relation to the hydrolytic hydrogen production reaction. The experimental results show that the hydrolytic hydrogen production reaction is good when 45 wt% Co2+/γ-Al2O3 catalyst is placed in the primary hydrogen production tank at a catalyst bed temperature of 55 °C. When the NaBH4+ Co2+ mixed powder in a ratio of 7:3 and steel balls in a ratio of 1:4 were placed in the secondary hydrogen production tank for 2 h of ball milling, the hydrogen production increased favorably. The hydrogen storage can be increased effectively without wasting the water vapor entrained in the hydrolytic hydrogen production reaction, and the water vapor effect on back-end storage can be reduced.
Highlights
The demand for energy has increased and the dependence on fossil energy is high, as fossil fuels decrease, green energy has gradually become the trend
Kao et al [24] used mechanical lapping equipment to grind NaBH4 powder and the Co catalyst for 30 min, the powder particles were 5 μm, and dispersed uniformly. They indicated that the mixed powder was filled into the catalyst bed, and when the catalyst bed temperature increased, the hydrogen production rate was better
For 30 min, the powder particles were 5 μm, and dispersed uniformly
Summary
The demand for energy has increased and the dependence on fossil energy is high, as fossil fuels decrease, green energy has gradually become the trend. Vinokuov et al [15] used hallo site nanotubes as the carrier, carrying metal catalyst Co2+ as the catalyst for hydrolytic hydrogen production reaction, where the best Co2+ concentration was 16 wt%, and the maximum hydrogen production rate was 3 L/min g cat. Kao et al [24] used mechanical lapping equipment to grind NaBH4 powder and the Co catalyst for 30 min, the powder particles were 5 μm, and dispersed uniformly They indicated that the mixed powder was filled into the catalyst bed, and when the catalyst bed temperature increased, the hydrogen production rate was better. The surface area was 202.4 m 2/g, and the HGR for 30 min, the powder particles were 5 μm, and dispersed uniformly /Al2 O3iscatalyst used in the hydrogen production tank. tank, and the NaBH4 + Co catalyst is used in the secondary primary hydrogen production hydrogen production tank
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