Hydrotreati

Oil refining is the process of distilling oil and then further reforming, catalytic cracking, hydrofining, blending, and sometimes coking, hydrocracking, alkylating various fractions of the distilled oil.

When gasoline is heated in the presence of hydrogen gas and a catalyst, the gasoline crack. The cracking gasoline decomposes to 1 mol of methane, 2 mol of ethane, and 1 mole of propane for jet fuel. It is a process known as hydrocracking.

There are two primary uses for hydrogen today. About half is used to produce ammonia (NH3) via the Haber process, which is then used directly or indirectly as fertilizer. Because both the world population and the intensive agriculture used to support it are growing, ammonia demand is growing. The other half of current hydrogen production is used to convert heavy petroleum sources into lighter fractions suitable for use as fuels. This latter process is known as hydrocracking. Hydrocracking represents an even larger growth area, since rising oil prices encourage oil companies to extract poorer source material, such as tar sands and oil shale. The scale economies inherent in large scale oil refining and fertilizer manufacture make possible on-site production and "captive" use. Smaller quantities of "merchant" hydrogen are manufactured and delivered to end users as well

Its used for processing foods.

Hydrogen is used in massive quantities in the petroleum and chemical industries. In a petrochemical plant, hydrogen is used for hydrodealkylation, hydrodesulfurization, and hydrocracking, all methods of refining crude oil for wider use. In the food industry, hydrogen is used to hydrogenate oils or fats, which permits the production of margarine from liquid vegetable oil. Hydrogen is used to produce Methanol and hydrochloric acid, as well as being used as a reducing agent for metal ores.