Figure 8
From: Carbon and Nitrogen Speciation in N-poor C-O-H-N Fluids at 6.3 GPa and 1100–1400 °C

Main chemical processes during formation of equilibrium fluids. (a) initial thermal formation of radical species from higher hydrocarbons in homolysis, rearrangement, their further rearrangement and β-scission reactions; (b) thermal decarboxylation of carboxylic acids; (c) processes involving carboxyl acids; (d) hydrogen reduction of carbonyl compounds.