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A typical fluid catalytic cracking unit in a petroleum refinery. Fluid catalytic cracking (FCC) is the conversion process used in petroleum refineries to convert the high-boiling point, high-molecular weight hydrocarbon fractions of petroleum (crude oils) into gasoline, alkene gases, and other petroleum products.
Hydrocracking is a catalytic cracking process assisted by the presence of added hydrogen gas. Unlike a hydrotreater, hydrocracking uses hydrogen to break C–C bonds (hydrotreatment is conducted prior to hydrocracking to protect the catalysts in a hydrocracking process). In 2010, 265 million tons of petroleum was processed with this technology.
Equilibrium Catalyst refers to the deactivated or spent catalyst after use in a chemical reaction.. The main player in oil refining processes such as fluid catalytic cracking (FCC), hydroprocessing, hydrocracking is the catalyst or zeolitic material, that breaks down complex and long-chain hydrocarbons into simple, useful hydrocarbons.
Most refineries, therefore, add vacuum distillation and catalytic cracking, which adds one more level of complexity by reducing fuel oil by conversion to light distillates and middle distillates. A coking refinery adds further complexity to the cracking refinery by high conversion of fuel oil into distillates and petroleum coke.
Naphtha must be desulfurized before sending it to a catalytic reformer unit. [1] [44] Catalytic reformer converts the desulfurized naphtha molecules into higher-octane molecules to produce reformate (reformer product). The reformate has higher content of aromatics and cyclic hydrocarbons which is a component of the end-product gasoline or petrol.
For catalytic cracking, the Y zeolite is often used in a rare earth-hydrogen exchanged form. [9] By using thermal, hydrothermal or chemical methods, some of the alumina can be removed from the Y zeolite framework, resulting in high-silica Y zeolites. Such zeolites are used in cracking and hydrocracking catalysts. Complete dealumination results ...
Some refinery naphthas include olefinic hydrocarbons, such as naphthas derived from the fluid catalytic cracking and coking processes used in many refineries. Some refineries may also desulfurize and catalytically reform those naphthas. However, for the most part, catalytic reforming is mainly used on the straight-run heavy naphthas, such as ...
Hydroprocessing is a catalytic term relating to the processes of hydrocracking and hydrotreating. [1] These process are for the removal of sulfur, oxygen, nitrogen and metals from crude oil, this is done in the refining of fuel to enable lower sulfur levels in fuels. [2] [3] [4] [5]