Preparation method of coal-oil slurry coprocessed by coal-oil hydrogenation, coal-oil slurry and its coprocessing method

Abstract

The invention relates to a preparation method of a coal-oil slurry coprocessed by coal-oil hydrogenation, the coal-oil slurry and its coprocessing method. The preparation method of the coal-oil slurry comprises the following steps of: predispersing FeOOH in a nanometer dimension onto coprocessed coal dust in the presence of an iron-containing main catalyst precursor under the action of a dispersing aid, and mixing the coprocessed coal dust, a sulfur containing auxiliary agent and coprocessed oil to prepare the coal-oil slurry. During the coal-oil coprocessing process, FeOOH undergoes in-situ decomposition and sulfuration to generate a nascent active component. The coal-oil slurry and the coprocessing method have advantages of high conversion rate, high oil yield, small catalyst amount and the like.

Description

technical field [0001] The invention relates to a method for preparing oil-coal hydrogenation co-refining coal slurry, the oil-coal slurry obtained by the preparation method and an application method of the oil-coal slurry in oil-coal hydrogenation co-refining. Background technique [0002] In recent years, the world's oil resources have become increasingly scarce, and the problem of heavy and inferior oil resources has become more and more obvious. However, with the rapid economic growth, the society's demand for oil products is increasing day by day. Heavy oil deep processing technology can not only effectively utilize oil resources, but also improve the economic benefits of oil processing enterprises. At the same time, my country is a country rich in coal resources. How to convert the abundant and cheap coal resources into liquid products has become an important development direction for the clean utilization of coal resources. [0003] Oil-coal hydroprocessing co-refini...

AI Technical Summary

Problems solved by technology

The second category is metal halide catalysts, such as zinc chloride and tin chloride, etc.; metal halide catalysts are strong acid catalysts, which have a strong catalytic effect on cracking reactions, but are severely corrosive to liquefaction equipment and difficult to industrialize

[0005] Due to the wide range of sources and low price, iron-based catalysts can be used once without recycling, and are discharged with liquefied residues, causing no additional impact on the environment. They have become a hot research topic at present, but there are still problems of low activity and oil yield. Reducing the size of the catalyst is one of the important means to improve the activity of iron-based catalysts. For example, CN1778871A discloses a highly dispersed iron-based catalyst for direct hydrogenation and liquefaction of coal. The preparation method adopts FeSO 4 Add the solution to the carrier coal, stir evenly, and then add an alkaline solution containing hydroxide ions to generate Fe(OH) 2 Precipitate on coal powder, then oxidize into active component γ-FeOOH with air or oxygen at 20-50°C, then filter and dry to make finished catalyst. The active component γ-FeOOH is strip-shaped, 60-200nm long , with a width of 20-100nm, the appropriate addition amount for direct coal liquefaction is 0.5-1.0% by weight of dry coal, the disadvantage is that the active component has a large size and the product oil yield is low