The organic hydrogen content of coal reduces with increasing coalification degree.
The organic nitrogen content of coal decreases with increasing coalification degree at greater depths.
Coalification has occurred naturally as a process mitigating high concentrations of atmospheric C[O.
The latter technique was developed early in the 20th Century with the aim of understanding the mechanisms of coal formation (Bergius and Specht 1913; Berl and Schmidt 1932), as the process of low-temperature HTC is considered to simulate natural coalification at accelerated rates (Hu et al.
13]CNMR, micro-FTIR and fluorescence spectra, and pyrolysis-gas chromatograms of coalified foliage of late Carboniferous medullosan seed ferns, Nova Scotia, Canada: implications for coalification
includes low-temperature biogeochemical processes from burial of plants to coal formation .
Distribution of coalification
patterns in Canadian bituminous and anthracite coals.
About peculiarities of coalification
of sapropelic coals, oil shales and dispersed organic matter of sediments // Organic Matter in Geological Processes.
Coal rank indicates the progressive alteration, or coalification
, from lignite to anthracite, Lignite contains approximately 9 to 17 million BTU per ton.