Suspended bed hydrogenation multicomponent composite iron-based catalyst and preparation method thereof

Abstract

The invention discloses a suspended bed hydrogenation multicomponent composite iron-based catalyst and a preparation method thereof. The catalyst uses layered bimetallic hydroxide Fe<3+> based hydrotalcite as an active component and uses at least one of coal powder, semi-coke and a porous carbon material as carriers. The composition of the active component is [(M<2+>)1-x(Fe<3+>M<e+>)x(OH)<2>]<X+>(A<n->)x / n.mH2O]<x->, wherein the M<2+> is one or more of Mg<2+>, Zn<2+>, Cu<2+>, Ni<2+>, Co<2+>, Ca<2+>, Mn<2+> and Fe<2+>, the M<e+> is 0-3 of Al<3+>, Co<3+>, Cr<3+>, Ti<3+> and Mo<5+>, the A<n-> is1-3 of OH<->, SO4<2->, NO3<->, CO3<2-> and Cl<->, 0.2<=x<=0.33, and m=0-10. The catalyst of the invention uses the Fe<3+> based hydrotalcite as the active component, the active component is uniformlydistributed on the surfaces of the carriers, and so the dispersion is better and the activity of the catalyst is higher. Moreover, the catalyst has the advantages of mild preparation conditions, simple preparation process and low raw material cost. The composition of the active component is flexible and changeable and can be flexibly adjusted according to needs of a suspended bed hydrogenation process and products.

Description

technical field [0001] The invention belongs to the technical fields of petroleum processing and coal chemical industry, and in particular relates to a high-activity multi-element composite iron-based catalyst applied to a suspension bed hydrogenation reaction (also called a slurry bed hydrogenation reaction) and a preparation method thereof. Background technique [0002] Suspended bed hydrogenation technology has a long history. Since Germany applied it in the field of coal-to-oil during World War II, the technology has been continuously updated and iterated. At present, the suspended bed hydrogenation technology has been widely used in the field of lightening heavy and inferior oil, the field of direct coal to oil, the field of kerosene co-refining (or the field of coal and oil co-processing, or the field of coal and oil co-hydrogenation) and the field of coal tar The field of hydrogenation technology, etc., involves two important aspects of energy and chemical industry, p...

AI Technical Summary

Problems solved by technology

Compared with industrial waste residue and natural ore catalysts, the dispersion of the active components of the above two catalysts is significantly improved, and the amount of iron used is significantly reduced. However, the catalysts are dominated by a single active component of iron, and the catalytic activity is still poor.

Patent CN104888797A discloses a FeOOH catalyst containing a structural aid and a second active element. The catalyst structure is doped with other components, but without a carrier, it is not easy to be effective in the suspension bed hydrogenation reaction system. spread out, the catalytic activity is limited

Patent CN104096563A discloses a FeOOH supported catalyst containing structural aids, patent 106732606A discloses a FeOOH supported catalyst doped with Ni, Co second active elements and Al, Zn structural aids, the above two patents Both have a certain effect on improving the dispersion of FeOOH catalyst active components and catalyst activity, but all use FeOOH as the main active component. Although the second active metal is doped, the catalyst activity is still limited and still needs to be improved.

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