Pd-promoted Ni-Ca-Al bi-functional catalyst for integrated sorption-enhanced steam reforming of glycerol and methane reforming of carbonate

Abstract

Abstract The integration process of sorption-enhanced steam reforming (SESR) reaction and methane reforming (MR) of carbonates provides a promising way to produce high-purity H2 without CO2 emission. However, the huge different reaction temperature of SESR (∼550 oC) and MR (>750 oC) hinders this coupling process. Herein, we report that the Pd-promoted Ni-Ca-Al bi-functional catalyst can lower the MR reaction temperature to 650 oC by enhancing CH4 decomposition activity to provide H2 molecules or atoms. The low regeneration temperature significantly improves the stability of SESR of glycerol (SESRG) reaction with only 8% increase in Ni particle size and 25% decrease of sorption-enhanced effect after 10 SESRG-MR cycles. Thanks to the high stability of the catalyst, 98.3% hydrogen-enriched stream and syngas with RH2/CO