Experimental study of availability of using of co2 coming from exhaust in hydrogen production technology of nabh4

It has been extensively studied over the last years on hydrogen-containing chemical compounds to produce hydrogen on demand, and in the amount needed. Especially, sodium borohydride is a preferred compound because of its excellent characteristics for hydrogen production. Aqueous alkaline sodium borohydride solution is safely stored and transported as it is stable at room temperature. Expensive compounds such as containing, nickel, ruthenium and cobalt are generally used to produce hydrogen from aqueous alkaline sodium borohydride solution as catalysts. But, some studies have shown that there is a direct correlation between pH value and stability of sodium borohydride solutions. Carbon dioxide gas having acidic effect has potential to easily change pH value of solutions. In this study, hydrogen was obtained from alkaline sodium borohydride solutions by using the new method described above. Hydrolysis experiments were carried out at different temperatures by sending carbon dioxide gas to sodium borohydride solution containing potassium hydroxide for one minute. Solution concentration, solution temperature, amount of sodium borohydride, and flow rate of carbon dioxide gas were selected as variable. Thus, the effects of solution concentration, solution temperature, amount of sodium borohydride, flow rate of carbon dioxide gas and pH value of solution to rate of obtained hydrogen were investigated experimentally. As a result of this study, it has been considered that a system can be designed that allows to be produced hydrogen without using of expensive catalysts by changing pH value of solutions through carbon dioxide gas generated at the end of combustion in systems where fossil fuels are used. It has been thought that combustion efficiency will increase, and fuel consumption and amount of waste gas will decrease by transferring the obtained hydrogen to combustion system.