CATL 2 |
| Shigeru Kado, Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, 113-8656 Tokyo, Japan, Yasushi Sekine, Department of Applied Chemistry, School of Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, 169-8555 Tokyo, Japan, Tomohiro Nozaki, Department of Mechanical and Control Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, 152-8552 Tokyo, Japan, and Ken Okazaki, Department of Mechanical and Control Engineerign, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, 152-8552 Tokyo, Japan. |
| On the direct conversion of methane using atmospheric non-equilibrium plasmas, the comparison of the selectivity and the energy efficiency was made among dielectric-barrier discharge (DBD), corona discharge and spark discharge. There were striking differences observed in the composition of products. In DBD reaction, the formation of higher hydrocarbons (> C3) was dominant, whereas, in corona and spark discharge, C2 compounds were the main products. Especially in spark discharge, acetylene selectivity was higher than 85% with much higher energy efficiency than that in DBD and corona discharge. It is considered that these differences in the reactivity are derived from the differences in the gas temperature and plasma parameters among these three methods. As for spark discharge, the emission spectrum obtained in pure methane flow was almost the same as that in hydrogen atmosphere. This indicates that methane is highly dissociated into C and H in spark discharge channel. |
|
Plasma Technology and Catalysis
8:00 AM-12:00 PM, Monday, March 24, 2003 Convention Center -- Room 342, Oral
Catalysis & Surface Science Secretariat |