Coal liquefied oil boiling bed hydrogenation treatment catalyst and preparation method thereof

Abstract

The invention discloses a catalyst for coal liquification oil hydrogenation on boiling bed and the preparation method. Besides normal hydrogenation catalyst, the catalyst aslo contains silicon oxide fiber, the content of which in catalyst is 3- 10wt%. The mechanical strength and wearing resistance of catalyst are strong, which increases catalyst stability and life length. It can remove nitrogen and sulfur from coal liquification oil maximumly, reduces olefin and aromatic hydrocarbons content, increases product stability and provides high performance coal liquification solvent oil.

Description

technical field [0001] The invention relates to an ebullating bed hydrogenation treatment catalyst and a preparation method thereof, in particular to an ebullation bed hydrogenation treatment catalyst for stable hydrogenation of coal liquefied oil and a preparation method thereof. Background technique [0002] Due to the characteristics of the ebullating bed hydrogenation reaction itself, the ebullating bed hydrogenation catalyst is always in a boiling state in the reactor, so the strength and wear resistance of the hydrogenation catalyst are higher than those of the fixed bed hydrogenation catalyst. At present, ebullating bed hydrogenation catalysts generally use fixed-bed hydrogenation catalysts, with refractory inorganic oxides as carriers, and Group VIB and / or Group VIII metals as active components, and each component is in the form of fine powder Sintered form exists. The strength and wear resistance of the catalyst still need to be further improved. [0003] CN 13624...

AI Technical Summary

Problems solved by technology

However, the hydroprocessing of coal liquefied oil by the fixed bed process has the following problems: because the coal liquefied oil is heavy and contains many mechanical impurities, the catalytic reaction conditions will be relatively harsh; high-nitrogen raw materials will accelerate catalyst deactivation, and the service life of the catalyst is very long. short, the product properties cannot be guaranteed; the pressure drop of the catalyst bed is high; in order to meet the product index, the fixed bed reactor system needs to adopt a more complicated design, which will increase the investment cost

Due to the large pore structure of the catalyst and no method for increasing the strength of the catalyst, the strength and wear resistance of the catalyst still need to be further improved.

Moreover, the catalyst contains alkali metal Na, which will affect the hydrogenation activity and stability of the catalyst.