Biomethane conversion into ethylene : investigating the potential of a plasma-catalyst system

Abstract

In this study, methane pyrolysis using atmospheric microwave (MW) plasma reactor was investigated, with focus on the production of C₂ hydrocarbons, specifically acetylene and ethylene, alongside hydrogen. The research explores the effect of various parameters, including CH₄:H₂ ratios, total flow rates, MW power, and methane concentrations on the efficiency of methane conversion and the selectivity, yield, and the energy cost of C₂ hydrocarbon products. Key findings include achieving a soot-free methane pyrolysis process and evaluating the formation of aromatics, heavier hydrocarbons, and potential hydrogen cyanide formation. The study also investigates the selective catalytic hydrogenation of acetylene to ethylene using Palladium (Pd) catalyst. Overall, this work underscores the potential of MW plasma as a viable alternative to traditional thermal and catalytic methods, as well as other plasma techniques, providing insights into optimizing conditions for maximum yield and efficiency in methane pyrolysis and the potential of a plasma-catalyst system, contributing to sustainable energy production by offering a more environmentally friendly approach to hydrogen generation and the production of valuable hydrocarbons from methane.