BIMETALLIC Co-Pd CATALYSTS FOR DRY AND BIREFORMING OF METHANE

Аннотация

Carbon dioxide reforming of methane represents a promising method to effectively convert both
greenhouse gases – CH4 and CO2 into valuable energy resources via syngas. Adding steam to a feed allow to adjust
syngas composition that is important for its following application. This work considers the bimetallic Co-based
catalyst modified with additive of noble metal – Pd and supported on alumina tested in the dry (DRM) and combined
steam-dry (CSDR) reforming so-called bireforming of methane (BRM) to produce synthesis gas with a controllable
ratio of H2/CO. The addition of small amount of noble metal (2-5% from total metal mass) to the Co-based catalyst
caused an increase in efficiency of the catalyst in the both processes. The bimetallic 5%Co-Pd/Al2O3 catalyst
revealed the high stable activity and selectivity during its long-term continuous testing. Thus, in BRM the extent of
conversion of CH4 and CO2 are 93 and 84% respectively at t = 700о
С, CH4:CO2:H2O = 1:1:0.5 under atmospheric
pressure. No losses of activity and selectivity of the 5%Co-Pd(4.9:0.1)/Аl2О3 catalyst were observed during for
100 hours of its continuous operation. The catalysts were characterized by BET, SEM, TEM, and TPR methods. The
catalysts studied can be considered as a prospective base to develop the effective catalysts for methane conversion
into valuable syngas with controllable ratio.