ScienceDaily have an ongoing roundup of organic-chemistry engineering under the "Fossil Fuels" heading. I'll mix up some mint tea as to approach all this with a sober and calm mind. The Baghestan's standpoint is that we don't care about "climate"; and we care about "carbon" inasmuch as we'd rather use it before we let the trees have it. We are also keen to do this chemistry on other planets.
For carbon-dioxide we already got, electrochemical reduction "CO2R" sometimes blows out unwanted byproducts. Among these: if we reduce with a hydrate - like water - said reduction gives off hydrogen. That hydrogen will probably escape - taking with it, the useful chemicals we want, like methanol. Acid and a metal catalyst makes CO2R efficient. The catalyst being gold or zinc.
Meanwhile catalysts could stand, themselves, to use less power. Magnets might help.
Among what we can convert CO2 into is formic acid. Which we've looked at. Also acetates, also looked-at; but now they're saying they can do it by the kilo.
As to the chemicals from CO2R proper, carbon-monoxide seems most-obvious. One of many uses Robert Zubrin had for CO, was for methanol. Enjoy. I prefer tea.
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