• 迪宝催化剂


  • 迪宝催化剂


  • 迪宝


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News Detail

Introduction to the reformation function of Pre-reforming Catalysts

Catalyst News
Release time:
2021/11/29 14:01
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Catalytic reforming is one of the main processing methods in modern oil refining and petrochemical industry. The purpose is to use the role of Pre-reforming Catalysts to rearrange the hydrocarbon molecules in straight-run gasoline to increase the octane number of gasoline and produce valuable products at the same time of aromatics.

Pre-reforming Catalysts

The so-called "catalytic reforming" means that the molecular structure of hydrocarbons is rearranged into a new structure: in the presence of Pre-reforming Catalysts, reforming gasoline fractions is called catalytic reforming. The main purpose of catalytic reforming is to produce aromatic hydrocarbons such as benzene, toluene and xylene, or to produce high-octane gasoline. The reforming process of gasoline under the action of heat is called thermal reforming, which needs to be carried out at a high temperature of 530 to 580°C and a pressure of 3 to 7 MPa. Under these conditions, the gasoline octane number can also be increased, but the yield of the process is low and the product quality is not good.

The catalytic reforming reaction is very complicated. Only in terms of the paraffin aromatization process, there are several steps in the middle, all of which can take place in the presence of Pre-reforming Catalysts, which requires Pre-reforming Catalysts to have multiple functions . One is the acidic function to promote isomerization; the other is the dehydrogenation function.

The initial catalytic reforming is carried out in a fixed-bed reactor using a catalyst with metal oxides such as chromium, molybdenum, and cobalt as active components. Due to the low activity and short lifespan of Pre-reforming Catalysts, they have not been developed .

This is a major innovation in catalytic reforming. Platinum is a metal that has the ability to strongly attract hydrogen atoms. It has a good catalytic function for dehydroaromatization reactions, so it has become a commonly used Pre-reforming Catalysts metal for catalytic reforming. The advent of platinum reforming has greatly improved the reforming conversion rate and aromatic yield, and the operating temperature and pressure have dropped. In the future, with the emergence of bimetallic (such as platinum-rhenium) catalysts and multimetallic catalysts, the activity and stability of Pre-reforming Catalysts have been greatly improved, and the reforming process has become more reasonable.