Nickel oxide (NiO) of different morphologies and with various dopants in CO2 methanation

Abstract

The synthesis of NiO micro-(MPs) and nanoparticles(NPs) with different morphologies is difficult process. The choice of chemical process, duration, and reaction conditions affect the size and properties of NiO MPs and NPs. In our work, we use solvothermal synthesis in the atmosphere of alcohols and high-temperature decomposition of nickel hydroxide. In the CO2 methanation, nickel oxide MPs and NPs have found greater use due to their selectivity for methane CH4. The conversion rate for CO2 is more than 70%, while the selectivity for CH4 is around 100%! This makes nickel oxide MPs and NPs a promising direction in the industrial production of methane,especially with the growing attractiveness of DAC(direct air capture) technology.