LAUSR

Abstract Methane decomposition was conducted by using K 2 CO 3 /carbon hybrids as the catalysts, and hydrogen-rich gas (with hydrogen content of about 87%) and fibrous carbons can be simultaneously obtained together with high and stable methane conversion (up to about 90% at 850 °C). Effects of K 2 CO 3 on methane conversion, hydrogen content and fibrous carbons were investigated by changing the reaction temperature and space velocity. The results indicate that K 2 CO 3 can greatly promote methane activation and conversion, taking responsibility for the continuous formation of CO and a trace of CO 2 . The oxygen transfer from K 2 CO 3 probably provides convenience for the formation and growth of fibrous carbons.