Amplification And Integration Study Of Self-heating Microreactor For Methanol Reforming Hydrogen Production

With the rapid advancement of energy transformation,the application of hydrogen as an energy source has developed rapidly.However,traditional hydrogen storage methods still have problems such as insufficient hydrogen storage density and high storage and transportation costs.In order to provide a continuous online hydrogen source for high-power hydrogen fuel cell power devices and to achieve continuous production of large-scale hydrogen,this paper proposes the design of a high-power methanol autothermal reforming hydrogen production reactor.The amplification performance of methanol reforming hydrogen production reaction was analyzed.The heat transfer performance,thermal control and heat distribution of methanol catalytic combustion were studied.The self-heating hydrogen production performance was tested.The main research contents are as follows:(1)CFD numerical simulation on size and quantity amplification of microreactor for methanol reforming hydrogen productionTwo different sizes and series-parallel integrated amplification microreactors reaction watershed models were established with SolidWorks.The fluid velocity distribution,pressure drop,temperature and hydrogen concentration in the reaction results were analyzed by Fluent simulation.By comparing the performance of different types of microreactors,it is concluded that the small size and parallel microreactors have better mass transfer heat transfer characteristics and lower pressure drop and high methanol conversion.(2)Experimental study on size and quantity amplification of microreactor for methanol reforming hydrogen productionThe foamed copper was selected as the catalyst reaction carrier,and the surface morphology analysis and catalyst loading strength test were carried out.The experimental study on the amplification model of hydrogen production microreactor was carried out,focusing on the microreactors assembled by size amplification and series-parallel assembly.The hydrogen production performance at the flow rate and reaction temperature confirmed that the parallel-mounted microreactor of the smaller-sized reaction chamber has a better hydrogen flow rate and exhibits a linear growth law.(3)Catalytic combustion chamber heat transfer performance test and temperature controlThe heating capacity of the methanol air combustion chamber is tested,exploring the effect of the flow mode of the fluid and the arrangement of the porous foam copper in the heat exchange chamber on the heat exchange capacity of the combustion chamber.The heating capacity of the methanol catalytic combustion chamber was analyzed.It was confirmed that the combustion chamber had enough reaction heat to meet the requirements.The heat of hydrogen production from methanol reforming is required.Through the optimization of the PID parameter of the SCM,the temperature response of the combustion chamber is fast,the static temperature is stable,and the temperature is stable without oscillation.(4)Analysis of temperature distribution of catalytic combustion reaction chamber and study of coupling hydrogen production performanceIn order to explore and optimize the ability of the catalytic combustion chamber to uniformly supply heat,three arrangements of catalysts in the combustion chamber were proposed.Observing and analyzing the different combustion chamber internal and surface temperature time curves and their distributions in different combustion chambers internal and surface under different fuel flow rates.Finally,the combustion reaction was coupled with methanol steam reforming hydrogen production reaction and the hydrogen production performance was tested.It was concluded that the foamed copper graded catalyst filled combustion chamber had better coupling hydrogen production performance.