A kind of iron-based catalyst for hydrogenation liquefaction of carbon-containing raw materials and its preparation method and application

Abstract

The invention discloses a creamy iron-based catalyst, its preparation method and application. The method comprises the steps of: (1) preparing a ferrous sulfate solution; (2) when the auxiliary agent contains SiO2 and / or Al2O3, adding a silicon source and / or an aluminum source to the ferrous sulfate solution, and adding a precipitation agent Carry out co-precipitation to obtain a precipitated slurry; (3) wash the precipitated slurry with water, and filter to obtain a filter cake; (4) obtain the creamy iron-based catalyst according to the following 1) or 2): 1) filter the Cake and solvent oil or a mixture of solvent oil and dispersant are mixed to obtain a mixture, and the mixture is crushed by mechanical stirring; the crushed material is sheared to obtain a creamy iron-based catalyst; the shearing process is accompanied by a dehydration process ; 2) When the auxiliary agent contains MgO and / or CaO, proceed according to the following a) or b). The emulsifiable oil catalyst system of the present invention is stable in state, does not delaminate during storage, and can be stored continuously for more than three months without deterioration, so it is very suitable for large-scale industrial use.

Description

technical field [0001] The invention relates to a carbon-containing resource hydrogenation liquefaction catalyst and its preparation method and application, in particular to an iron-based catalyst for carbon-containing raw material hydrogenation liquefaction and its preparation method and application, belonging to the field of energy and chemical catalysis. Background technique [0002] Coal, biomass, residual oil, heavy oil, etc. are all important and valuable carbon resources. my country is relatively rich in coal resources, especially young hydrogen-rich coal reserves such as lignite and bituminous coal, which can be directly liquefied by high-pressure catalytic hydrogenation to generate liquid fuels. Furthermore, liquid fuels can also be generated through the co-hydrogenation and liquefaction of the mixture of the above-mentioned carbon-containing resources, such as coal / residue oil, coal / heavy oil, biomass / coal, biomass / residue oil, biomass / heavy oil, etc. High-pressur...

AI Technical Summary

Problems solved by technology

The most industrial potential is the precipitation method of alkaline solution and iron salt, but it is difficult to make a highly dispersed ultrafine particle iron-based catalyst only by conventional precipitation method without taking special measures. In addition, the Fe(OH) produced by precipitation ) 2 , Fe(OH) 3 When the particles are dried and dehydrated or roasted Fe 2 o 3 During the process, the particle size will increase sharply, and ultrasonic dispersion or grinding is required during use, which will significantly increase the cost of the catalyst, and the process is more complicated

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