- Petroleum refining processes : The chemical engineering processes used in petroleum refining.
- Amine gas treating : A process using aqueous solutions of amines to remove hydrogen sulfide (H2S) and carbon dioxide (CO2) from gases
- Catalytic reforming : A catalytic chemical process that converts petroleum naphthas into high-octane gasoline components.
- Hydrodesulfurization : A catalytic chemical process used in petroleum refining to remove sulfur compounds from intermediate and refined end-products.
- Hydrogen sulfide : A chemical compound with the formula H2S, which is a colorless, highly toxic, flammable gas with a characteristic foul odor.
- Natural gas processing : Industrial facilities that process raw natural gas to remove contaminants as well as to separate out and recover by product natural gas liquids.
- Petroleum naphtha : An intermediate hydrocarbon liquid stream derived from the refining of petroleum crude oil and which may be further processed to obtain a gasoline blending component.