Abstract
Co-precipitated Ni-Mg-Al hydrotalcite-derived catalyst promoted with vanadium were synthesized with different V loadings (0–4 wt%) and studied in CO2 methanation. The promotion with V significantly changes textural properties (specific surface area and mesoporosity) and improves the dispersion of nickel. Moreover, the vanadium promotion strongly influences the surface basicity by increasing the total number of basic sites. An optimal loading of 2 wt% leads to the highest activity in CO2 methanation, which is directly correlated with specific surface area, as well as the basic properties of the studied catalysts.
Highlights
The emission of greenhouse gases, especially CO2, is an important problem that society is currently facing [1]
Samples were tested in the CO2 methanation reaction as a function of temperature
Ni-CP-V1.0 resulted in slightly better catalytic performance than Ni-CP-V4.0, which may suggest that the increase of vanadium loading is not favorable
Summary
The emission of greenhouse gases, especially CO2, is an important problem that society is currently facing [1]. The fully decarbonized global industry is crucial to limit the climate change and to limit the global warming up to 2 ◦C by 2050–2070 [5]. This will involve an increase in energy efficiency for carbon capture, electrification, and sustainable production of hydrogen [5]. In this regard, carbon dioxide can be utilized in several chemical processes. The CO2 hydrogenation process to methane is an emerging technology and has been industrialized by companies such as Audi, DVGW, etc. [7]
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