CO2 reduction via Methane partial oxidation

This was referenced in the promotional supplement to the Dec 2019 issue of Scientific American. The idea is to combine methane and carbon dioxide to produce just water and unoxidized carbon – with the carbon in an economically attractive form such as nanotubes or fibres. If it works, and there is sufficient demand for the product, then it could perhaps eventually pull a significant amount of CO2 from the atmosphere while at the same time providing advanced materials for high tech applications.

Source: Texas A&M University at Qatar | Researchers develop natural gas processing technology that could reduce Qatar’s carbon footprint

Here’s an earlier theoretical discussion of the chemistry involved.