The origin of light hydrocarbons

Closed-system programmed-temperature pyrolysis on n-octadecane: Implications for the conversion of oil to gas

“…In a more realistic geological system, other factors such as the presence of water, minerals and thermochemical sulphate reduction (TSR) could greatly influence the thermal evolution of sedimentary organic matter and reservoired petroleum bitumens in gaseous hydrocarbon generation. These factors can not only accelerate hydrocarbon generation rate, but also probably change reaction processes (Mango, 2000). Burnham et al (1997) have shown that mixture effect delays the thermal cracking of n-C 16 when mixed with various reservoir oils.…”

Thermal degradation of organic matter in the interlayer clay–organic complex: A TG-FTIR study on a montmorillonite/12-aminolauric acid system

“…Various techniques have been applied to analyze the products yielded from the thermal degradation of organics, such as gas chromatography and mass spectrometry (Mango, 2000;Pan et al, 2010;Wei et al, 2006), which provide compositional and structural information of the end products of thermal degradation. However, these techniques do not provide information about the intermediate products, which is vital for identifying the reaction sequences and understanding the related reaction mechanisms.…”

Geochemical characteristics and origin of light hydrocarbons in biogenic gas

“…The generation mechanisms of light hydrocarbon are very complicated, including thermal cracking of kerogen and crude oil [21][22][23], catalysis [24][25][26][27][28], and bacterial action [29][30][31]. Due to low concentration of light hydrocarbon in biogenic gas, even a little mixture from thermal genetic gas can change its original composition.…”

“…Hunt et al [30] reported that C 4 -C 7 light hydrocarbon could be generated by bacterial action according to the experiment on terpenoids with bacteria [30]. Therefore, it is no doubt that light hydrocarbon can be generated by bacteria [28].…”