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...Recent advances in petrochemical science issn mini review adv petrochem sci volume issue june copyright all rights are reserved by mohan sr doi rapsci heavy oil refining processes and petrochemicals a role of catalysis s rana petroleum research center kuwait institute for scientific kisr submission published corresponding author emai abstract crude not only difficult to process but also its composition contains large amount undesirable elements considering an eco friendly approach towards fossil fuel based chemical transformations then one should use appropriate catalyst which may be economic intent toward the better environment however complexity feedstock catalytic method enough get best commodity product hence combination thermal methods can effectively used case primary need is lower boiling point complex hydrocarbon along with removal hetero atoms such sulfur nitrogen metals hydroprocessing plays important convert into various hc streams desire products specifications cracking hyd...