“…The importance of paraffinicity of coal for generating and expelling liquid hydrocarbons has received great attention (Isasken et al, 1998;Killops et al, 1998). Coal is the major conventional source of energy, which has eventually made the industrial revolution possible and 70% of growing energy demand has been largely met by the coal (Chaurasia and Nikkam, 2016;Chaurasia et al, 2018;Sahu et al, 2018). The unconventional resources are becoming increasingly important for energy requirement and focus has been given by scientists, researchers, and policy makers (Akanksha et al, 2017(Akanksha et al, , 2019Suman et al, 2017;Yadav et al, 2017).…”