STEAM-BIOGAS REFORMING OVER A METAL- FOAM-COATED (PD-RH)/(CEZRO2-AL2O3) CATALYST COMPARED WITH PELLET TYPE ALUMINA-SUPPORTED RH, RU AND NI CATALYSTS

摘要

Renewable Natural Gas (RNG) is a very low carbon fuel that can be produced from biogas, landfill gas, and a wide range of other renewable raw materials through pathways such as gasification and pyrolysis. A major obstacle to the commercial viability of RNG production projects is the high CO2 content (typically 30~60%) of the raw gas streams. CO2 separation is often capital-intensive and has a severely negative effect on the economic viability of the potential projects. Converting the CO2 along with the CH4 into syngas or hydrogen can help address this problem. The CO2 conversion option, if available, is very attractive since it has the potential to create new revenue streams while eliminating CO2 separation costs. This study compares a newly developed metal-foam-coated 1.31 wt% [Pd(7)- Rh(1)]/(CeZrO2-Al2O3) catalyst with pellet type alumina-supported 0.5 wt% Rh, 8 wt% Ru and 13 wt% Ni catalysts for steam-biogas reforming.