is a term used in petroleum geology to describe the cracking process which results in the conversion of organic kerogens into hydrocarbons.
Example: "Subsequent burial under more sediments, and thus at higher temperatures and pressures, allows catagenesis to complete the transformation of the biomass to fossil fuel by thermal cracking and decarboxylation."
[1]
R. C. Prince, “Crude Oil Releases to the Environment: Natural Fate and Remediation Options,” Reference Module in Earth Systems and Environmental Sciences, 2014, doi: 10.1016/b978-0-12-409548-9.09112-0.
ru: Катагенезис
Precursor
noun
is a compound that participates in a chemical reaction that produces another compound.
Example: "The question is whether these acids are indicators of algaenan precursors."
Snezana Bajc, André Amblès, Dragomir Vitorovic. “Preserved precursors in Pumpherston shale kerogen revealed by oxidative degradation,”, 2022, doi: 10.2298\/JSC0411923B
ru: предшественник
Residual
adjective
the remaining after most of something has gone.
Example: "Seven molecular models of initial and residual kerogens were established to trace the structure changes in kerogen with maturity."
[1]
Z. Huang, T. Liang, Z.-W. Zhan, Y.-R. Zou, M. Li, and P. Peng, “Chemical structure evolution of kerogen during oil generation,” Marine and Petroleum Geology, vol. 98, pp. 422–436, Dec. 2018, doi: 10.1016/j.marpetgeo.2018.08.039.
ru: остаточный
Stoichiometry parameter
noun
coefficient that stays before the symbol or formula of a substance in a chemical equation, reflecting the relative quantity of substances involved in the reaction.
Example: "Reaction rate parameters and stoichiometry coefficients determined from a variety of pyrolysis data are given for both type I and type II kerogen."
[1]
A. Burnham, “Chemical reaction model for oil and gas generation from type I and type II kerogen,” Academia.edu, Nov. 24, 2015.
ru: стехиометрический коэффициент
Volatile
adjective
(of a substance) easily evaporated at normal temperatures. Often it is describing a thing that changes rapidly.
Example: "The generation of methane and other hydrocarbon gases from coal occurs at the high volatile bituminous rank and higher."
[1]
W. H. Orem and R. B. Finkelman, “Coal Formation and Geochemistry,” Treatise on Geochemistry, pp. 191–222, 2003, doi: 10.1016/b0-08-043751-6/07097-3.
