Temperature effect and hydrogen elimination performance of hydrogen-oxygen catalytic recombination reaction in confined space
In order to investigate the influence of initial hydrogen volume fraction,oxygen flow rate and catalyst quality on the temperature of the hydrogen-oxygen catalytic recombination reaction and the effect of hydrogen elimination at room tempera-ture,the hydrogen-oxygen composite catalytic hydrogen elimination experiments were carried out in a self-designed cylindrical vessel using platinum/carbon (Pt/C) catalysts,and the development pattern was investigated on the basis of the temperatures and hydrogen volume fraction collected by the thermocouples and hydrogen concentration sensors. The results show that the distribution pattern of temperaturepeak is greatly affected by the reaction parameters. When the hydrogen volume fraction is less than the equivalent ratio,the hydrogen conversion rate reaches 100％ under the conditions in this study. The change of re-action temperature is mainly dominated by the hydrogen volume fraction,and when the hydrogen volume fraction is less than the equivalent ratio,the temperature peak increases with the increase of hydrogen volume fraction. The oxygen flow rate has a limited effect on the direction of temperature transfer,but its excessively high level increases the heat dissipation capacity of the system,thus affecting the heat accumulation of catalyst. The research results can provide reference basis for the design of hydrogen elimination in confined environments.
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