Data from: Plasma assisted CO2 methanation: effects on the low-temperature activity of a Ni-Ce catalyst and reaction performance

Ni-Ce three-dimensional material with macropore diameter of 146.6±8.4 nm
were synthesized and used for methanation catalyst. Firstly, H2-reduction
of catalyst was conducted in thermal fixed bed and plasma reactor
respectively, then X-ray diffraction (XRD) and CO2 Temperature Programmed
Desorption (TPD) experiments on the two reduced samples were carried out
to reveal the plasma effect on catalyst’s physicochemical properties. It
was found that plasma reduction created more abundant basic sites for CO2
adsorption, especially the medium basic sites were even doubled compared
with the thermal reduced catalysts. The plasma reduced catalyst exhibited
excellent low-temperature activity, ca. 50~60 oC lower than the thermal
catalyst (the maximum CO2 conversion point). Based on the optimum reduced
catalyst, plasma effect in the reactor level was further investigated
under high gas hour space velocity (GHSV) ~50000 h-1. The plasma reactor
showed higher CO2 conversion capacity and efficiency than the thermal
reactor.