Effect of the NO plus CO reaction on the consumption of carbon supports: An in situ TG-FTIR analysis

Activated semi-coke-based catalysts were prepared for the NO + CO reaction. In this paper, the consumption of the supports was systematically investigated. The reaction of NO + CO and the decomposition of loaded metals were also examined using in situ thermogravimetric-Fourier transform infrared spectroscopy (TG-FTIR). Kinetic analysis on the carbon consumption was also carried out. Further, the influence of the reaction temperature was explored. It is found O-2 was the major contributor to the consumption of the supports, whereas NO only assisted the consumption. The presence of O-2 could weaken the activity of the NO + CO reaction. A low concentration of CO2 promoted consumption of the supports to some extent, while the high concentration of CO2 inhibited the reaction. CO showed an excellent performance for promoting the NO + CO reaction. It could protect the supports, but it also promoted the decomposition of metals. After these analysis, the sustainable use of carbon-based catalysts is supported by some theories obtained in this paper.