Syngas Production over Nanosized Multicomponent Co-Fe-Containing Catalysts.

Carbon dioxide reforming of methane is a promising technology to recycle and reduce greenhouse gases (CH4, CO2) into valuable chemicals and fuels. The Co-Fe catalysts modified with a small amount of Pt and supported on alumina were designed to be explored in dry reforming (DRM) and combined CO2-steam reforming (bireforming, BRM) of methane to produce syngas. The catalysts were characterized by physico-chemical methods (i.e., BET, XRD, TEM, SEM, and TPR-H2). The synthesized catalysts are the X-ray amorphous nanosized materials with particle sizes of less than 30 nm. The processes were carried out using a feed of CH4/CO2/H2O = 1/1/0-0.5 at varying temperature (400-800 °C) at atmospheric pressure and GHSV = 1000 h-1. The combination of Co and Fe in varying ratios with Pt allowed for high activity and selectivity to be maintained. Extents of methane and CO2 conversion are varied within a range of 79.5-97.5 and 64.2-85.2%, respectively, at 700-800 °C, while the H2/CO ratio in the resulting syngas ranged from 0.98 to 1.30, depending on the catalyst and feed composition. Stability tests conducted for up to 80 h on stream showed no loss of activity of the 10%Co-Fe-Pt/Al2O3 catalysts in BRM. We believe that high activity of the synthesized catalysts occurs due to synergy in the Co-Fe-Pt system.