Artificial maturation of a high volatile bituminous coal from Asturias (NW Spain) in a confined pyrolysis system

Stratigraphic distribution of macerals and biomarkers in the Donets Basin: Implications for paleoecology, paleoclimatology and eustacy

“…These results agree with artificial maturation experiments (Eglinton et al, 1988;Han et al, 2001;Piedad-Sánchez et al, 2005) and with studies in other coal basins. A thermal effect was observed in British coals and in Ruhr Basin coals (Allan and Douglas, 1977;Littke et al, 1989a,b;Radke et al, 1980), where a set of coals with a VR of 0.7%, 0.9% and 1.3% R r exhibits n-alkane maxima at C 27 , C 21 and C 17 , respectively.…”

“…The same applies for diterpanes and hopanes. For higher ranks, Piedad-Sánchez et al (2005) showed by pyrolysis that proportion of nalkanes, steranes, diterpanes and hopanes change.…”

Distribution of thermogenic methane in Carboniferous coal seams of the Donets Basin (Ukraine): “Applications to exploitation of methane and forecast of mining hazards”

“…There is a limited amount of data on the generation of gas from Carboniferous coals during heating experiments. Different pyrolysis systems, such as open (Krooss et al, 1995;Friberg et al, 2000;Cramer, 2004), anhydrous closed (Higgs, 1986), hydrous (Kotarba and Lewan, 2004), MSSV (Schenk and Horsfield, 1998), and confined (Piedad-Sánchez et al, 2005) have been used to estimate the gas-generating potential of Carboniferous coals. Two Carboniferous coals from the Donets Basin in the Ukraine (Alsaab et al, 2007b) were pyrolysed in a confined pyrolysis system, covering a maturity range from 1.07 to 2.78%R r .…”

Evolution of Pennsylvanian (Late Carboniferous) peat swamps of the Ruhr Basin, Germany: Comparison of palynological, coal petrographical and organic geochemical data

“…Organic geochemical data provide information on bacterial, algal or vascular plant input, on salinity and on redox conditions of coals (e.g. Littke et al, , 1990Piedad-Sánchez et al, 2004). Palynology can be used in palaeoecological reconstructions provided that the dispersed miospores can be assigned to the spore producing plants.…”