Coking Characteristics of Dry Methane Reforming by DBD-catalyst Hybrid Reaction with Cyclic Operation

S. Kameshima, K. Tamura, Y. Ishibashi, and T. Nozaki

Department of Mechanical Sciences and Engineering, Tokyo Institute of Technology, Japan

Abstract- Dry methane reforming is promising technology to reduce CO2 emission. However, high temperature (> 800ツーC) is favor for the dry methane reforming by thermal reaction, and catalysts are deactivated and destroyed by coking, which is the major issue in the dry methane reforming. In this work, we succeeded the long time operation at low temperature by using DBD-catalyst hybrid reaction combined with cyclic operation, which conducted reforming and decoking reactions alternatively by pulsed methane supply. Plasma heating promoted reactions, and de-coking time was reduced by 35% from thermal reaction. CO formation in reforming was dominated by the reactions of CO2-CHx and CO2- H. In contrast, Boudouard reaction (C + CO2 → 2CO) eliminating solid carbon on catalysts has small contribution in reforming. This is caused by the difference of the reaction rates.

Keywords-Corona discharge, electromagnetic environment, transmission line, aging, pollution severity class

[Full text PDF]

Back to table of contents

top