In order to investigate the effects of electrode structure and packing materials on plasma discharge and carbon dioxide reforming effect

we measured the electrical signals of the linear tube DBD reaction device with three different electrode structures. At the same time

we analyzed the effects of different electrode structures and different packing materials media on reforming effect. The results show that when the internal electrode of the DBD reaction device is smooth electrode

bolt electrode

and coil electrode

the initial voltage decreases in turn. Under the same discharge voltage

the discharge power and the CO

2

a

s well as CH

4

conversion rates with coil electrode are all higher than those of other two electrodes. However

the selectivity of CO with coil electrode is much lower than that with other two electrodes. Packing dielectric materials into discharge gap of DBD reactor enables the production of partial discharges at the contact points and forms a polarized electric field on the surface of materials

which can accelerate the conversion of CH

4

and CO

2

. Compared to packing glass beads

the alumina balls have better performances for the adsorption of CO

2

. When packing alumina bulks

the reactor shows significant increases in the conversion of CH

4

because of the increasing part field strength generated at the edge of alumina bulks

but no obvious effect on the conversion of CO

2

is observed when packing alumina bulks compared with no packing.