wood smoke gas
complete combustion chemicals
carbon monoxide (CO),
carbon dioxide (CO2),
sulfur oxides (SOx),
nitrogen oxides (NOx)

Wood Combustion Basics

https://is.muni.cz/el/1423/podzim2013/MEB423/um/Wood_Lesson_02.pdf

Carbon dioxide (CO2) reading: The CO2 level in the flue gas provides an indication of the efficiency of the combustion process. If the production of CO2 is as high as possible with slight excess air (complete combustion)

https://findanyanswer.com/which-molecules-contain-only-carbon-hydrogen-and-oxygen.

Aldehydes, Ketones, Carboxylic Acids, and Esters

https://opentextbc.ca/chemistry/chapter/20-3-aldehydes-ketones-carboxylic-acids-and-esters/

..

complete combustion chemical reduction.

Carbon
Oxygen
Hydrogen
Potassium
Aldehyde

https://en.m.wikipedia.org/wiki/Aldehyde

https://en.m.wikipedia.org/wiki/Hydroformylation