First of all, as we understand online references we've accessed, "silanes" are relatively common industrial chemicals, encompassing a range of formulas. But, they are, basically, the silicon-hydrogen counterparts of carbon-hydrogen compounds such as methane. The technicalities are far beyond us, but it seems they can be made by, essentially, reacting commodity hydrochloric acid with a variety of abundant silicon-containing minerals. Beach sand is a common silicon-containing mineral, but we've no idea if it's inertness would allow it to be a feasible raw material, or not.
But: Silicon is as common as, literally, dirt; and, hydrochloric acid is nearly so.
In any case, once you've made silane, or bought it from one of it's multiple major industrial suppliers, you can collect some Carbon Dioxide and make the gasoline and plastics raw material, Methanol, out of it.
As per the excerpt, comment appended:
"Conversion of Carbon Dioxide into Methanol with Silanes over N-Heterocyclic Carbene Catalysts
Siti Nurhanna Riduan, Yugen Zhanj, Dr. Jackie Y. Ying; Inst. of Bioengineering; Singapore
Abstract: Carbon Dioxide was reduced with silane using a stable organocatalyst to provide methanol under very mild conditions. Dry air can serve as feedstock, and the organocatalyst is much more efficient than transition metal catalysts for this reaction. This approach offers a very promising protocol for chemical CO2 activation and fixation."
There are multiple items of import to be gleaned from our sparse extract of the abstract. And, we're compelled to oversimplify them, thus: With a product you can, in essence, make from beach sand and stomach acid, you can make liquid fuel, "methanol", out of "dry air".
Left unstated is that this is a productive recycling of Carbon Dioxide, as opposed to an expensive, and deceptive, "disposal" of it. Also unstated are the possibilities of siting such an operation at the business end of a coal plant's smokestack, where the CO2 would be more concentrated, and waste heat would be available to help drive the process.
And, note: We have cited these researchers, and/or their colleagues, in small and isolated Singapore, previously, on the subject of true Carbon Dioxide utilization. They are at work figuring out how to do the best they can with what they have to work with. In their case, it's "dry air".
We are blessed with abundant coal and concentrated smoke stack emissions.