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...Petroleum refining general description the industry converts crude oil into more than refined products including liquefied gas gasoline kerosene aviation fuel diesel oils lubricating and feedstocks for petrochemical refinery activities start with receipt of storage at include all handling operations terminate preparatory to shipping from employs a wide variety processes s processing flow scheme is largely determined by composition feedstock chosen slate example presented in figure shows arrangement used refineries united states major these will vary among few if any employ having direct emission sources are on bold line boxes listed below categories associated separation atmospheric distillation b vacuum c light ends recovery conversion cracking thermal catalytic reforming alkylation d polymerization e isomerization f coking g visbreaking treating hydrodesulfurization hydrotreating chemical sweetening acid removal deasphalting product blending loading unloading auxiliary facilities boi...