甲烷二氧化碳重整热化学储能实验研究

Experimental Study on Methane Reforming with Carbon Dioxide for Thermochemical Energy Storage

实验研究固定床反应器内CH_4-CO_2重整热化学储能过程,揭示加热温度、反应物流量及CH_4/CO_2摩尔比等参数对热化学储能过程的影响机制。实验结果显示:反应器内部轴向与径向均存在较大温度差;提高加热温度能够提高甲烷转化率和化学储能效率,但反应温度升高会导致反应器轴向温差变大,对反应器稳定运行不利;随着反应物流速的增大,甲烷转化率降低,化学储能效率先增后减存在极大值;提高CO_2含量有利于提高甲烷转化率,但会导致化学储能效率的降低。

The heat transfer and storage performances of methane reforming with carbon dioxide in fixed bed reactor are experimental investigated under different heating temperature,reactant flow rate and CH_4/CO_2 mole ratio.Experimental results showed that temperature difference in the reactor is very large.As the heating temperature rises,the methane conservation and thermochemical storage efficiency both increase,while the temperature difference in the bed also increases which is bad for the reactor.When the reactant flow is increased,the methane conservation decreases,while the thermochemical storage efficiency first increases and then decreases with a peak.In addition,the methane conservation will increase with carbon dioxide fraction,while the thermochemical storage efficiency decreases.