毫秒级快速接触反应催化氧化乙烷的实验研究

以α-Al2O3为载体，采用浸渍法制备了Pt催化剂, 考察了Pt催化条件下毫秒级快速重整C2H6的催化反应特性.通过测定重整反应过程中的温度分布情况，讨论了直接反应模型和间接反应模型.结果表明：混合气中燃氧摩尔比（r=n（C2H6）/ n（O2））和反应进气中氮气体积分数（φ（N2））对产物的选择性产生重要影响，随着混合气中r和φ（N2）的提高，C2H4的选择性逐渐增大（最高达70%），H2和CO的选择性（S（H2）、S（CO））降低；混合气体积流量(qV)对产物的选择性也有明显影响，当qV=4 L/min时S（H2）和S（CO）达到最高，分别为40%和75%；C2H6快速催化氧化的产物比例受到多相催化反应与气相反应共同作用.

Study on the Catalytic Oxidation of Ethane in a Million Seconds Contact Time Reactor

The Pt catalyst samples were prepared by impregnation of α Al2O3 foam monolith. By changing the radio of C2H6/O2, the percentage of N2 and total flow rate, the property of short contact time reforming (SCTR) in a million seconds was investigated. In addition, direct and indirect oxidation models were discussed by checking the temperature layout in the catalyst monolith. The results show that when enhancing C2H6/O2 ratio and N2 dilution ratio, the selectivity of C2H4 increases (up to 70%) and selectivity of CO and H2 decreases. The contact time affects the selectivity of the products from ethane oxidation, the selectivity of synthesis gas reaches maximum (S（H2）=40%，S（CO）=75%) at the flow rate of 4 L/min. The experimental results prove that SCTR is a combination of homogeneous and heterogeneous reaction.
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