Preferred Label : coalification;
IUPAC definition : A geological process of formation of materials with increasing content of the element
carbon from organic materials that occurs in a first, biological stage into peats,
followed by a gradual transformation into coal by action of moderate temperature (about
500 K) and high pressure in a geochemical stage.;
Scope note : coalification is a dehydrogenation process with a reaction rate slower by many orders
of magnitude than that of carbonization. some specific reactions approach completion
before others have started. the dehydrogenation remains incomplete. the degree of
coalification reached by an organic material in the process of coalification increases
progressively and can be defined by means of the measured c/h ratio and of the residual
contents of oxygen, sulfur and nitrogen.;
Origin ID : C01120;
See also
A geological process of formation of materials with increasing content of the element
carbon from organic materials that occurs in a first, biological stage into peats,
followed by a gradual transformation into coal by action of moderate temperature (about
500 K) and high pressure in a geochemical stage.
