介质阻挡放电等离子体-Cu-Ni/-γ-Al_2O_3催化剂体系在甲烷二氧化碳重整反应中的协同作用

Synergistic Effect of CO_2 Reforming of Methane over a Combined System of Dielectric-Barrier Discharge Plasma and Cu-Ni/γ-Al_2O_3 Catalyst

将介质阻挡放电(DBD)等离子体与Cu-Ni/γ-Al2O3催化剂结合用于甲烷二氧化碳重整制合成气.结果表明:DBD等离子体与催化剂之间产生明显的协同作用,与单纯放电或是单纯催化相比较,DBD等离子体与催化剂相结合极大地提高了反应活性及稳定性.通过XRD,H2-TPR,XPS及O2-TPO表征发现,Cu与Ni之间存在明显的相互作用,改变了各自的还原性能;同时Cu的加入提高了Ni的分散程度;等离子体的引入减少了反应过程中积炭的形成,提高了反应稳定性.

The synergistic effects of CO2 reforming of methane over a combined system of DBD plasma and Cu-Ni/γ-Al2O3 catalyst were examined.Interaction between DBD plasma and catalyst led to the significant improvements in catalytic performance of CH4 and CO2 conversions and CO and H2 selectivities as compared to those which was only on the plasma or on the catalyst.A synergistic effect between plasma and catalysis hao or was achieved over a combined system of DBD plasma and Cu-Ni/γ-Al2O3 catalyst.XRD,H2-TPR,XPS and O2-TPO were employed for characterizing the physical and chemical properties of fresh and used Cu-Ni/γ-Al2O3 catalyst.The results showed that there was an interaction between Ni and Cu species that affected the reducibility of the species concerned and with the introduction of Cu species the Ni dispersion increases.Moreover,the combined system of DBD plasma and Cu-Ni/γ-Al2O3 catalyst enhanced the coke-resistance ability of the catalyst.