Oxygenate

Chemical compounds containing oxygen often used as fuel additives

To oxygenate means to impregnate, combine, or supply something with oxygen, while oxygenates are hydrocarbons containing at least one oxygen atom that are used as fuel additives to promote complete combustion in fuel mixtures. Oxygenates can also be employed to reduce air pollution by reducing carbon monoxide production and soot particle size and compounds such as aromatic hydrocarbons, polyaromatic hydrocarbons, and nitrated polyaromatic hydrocarbons that are side-products caused by incomplete combustion.

This keyword could refer to multiple things. Here are some suggestions: