What Is Catalytic Reforming?

Catalytic reforming: Under the condition of catalyst, the process of rearranging the molecular structure of hydrocarbons in gasoline fractions into new molecular structures is called catalytic reforming. One of the petroleum refining processes, under the conditions of heating, hydrogen pressure and the presence of a catalyst, the light gasoline fraction (or naphtha) obtained from the distillation of crude oil is converted into high-octane gasoline (reformed gasoline) rich in aromatics Process of by-product liquefied petroleum gas and hydrogen. Reformed gasoline can be directly used as the blending component of gasoline, or benzene, toluene, and xylene can be produced by aromatics extraction. Hydrogen by-product is an important source of hydrogen used in hydrogenation units of petroleum refineries (such as hydrorefining and hydrocracking).

Catalytic reforming

1940s in

Including the following four main reactions:

In modern catalytic reforming catalysts, the metal component is mainly platinum, the acid component is halogen (fluorine or chlorine), and the support is alumina. Of which platinum

The raw material is naphtha or low-quality gasoline, which contains alkanes,

It mainly includes two steps of raw material pretreatment and reforming. When the purpose of producing aromatics is

Catalytic reforming is an important means of improving gasoline quality and producing petrochemical raw materials. It is a modern petroleum refinery and petrochemical industry.

Catalytic reforming

One of the most common installations in conglomerates (see color picture). According to statistics, in 1984 the annual processing capacity of catalytic reforming units worldwide has exceeded 350 Mt, most of which are used to produce high-octane gasoline components. China's existing plants are mostly used for the production of aromatics, and plants producing high-octane gasoline components are also being developed.

In order to solve the problem of catalyst coking caused by intensified operation, in addition to improving the performance of the catalyst, the following three ways have been opened in the way of catalyst regeneration: Semi-regeneration, that is, stopping the reformer after a period of operation The catalyst is regenerated in situ. Recycling. Several reactors are set up, and each reactor can be regenerated from the reaction system without affecting the continuous production of the device. Continuous regeneration. The catalyst can flow between the reactor and the regenerator. Under the conditions of normal operation of catalytic reforming, a part of the catalyst is sent to a special regenerator for regeneration. The regenerated catalyst is returned to the reactor.