Two-stage hydrogenation based direct coal liquefaction process

A technology of direct coal liquefaction and process, which is applied in the petroleum industry and the preparation of liquid hydrocarbon mixtures, etc. It can solve the problems of low production efficiency and low production efficiency of two-stage hydrogenated coal direct liquefaction process

Active Publication Date: 2015-03-18
任相坤
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the production efficiency of the two-stage hydrogenated coal direct liquefaction process in the prior art is very low, and those skilled in the art have not been able to find the reason for the low production efficiency of the process; Two-stage hydrogenated coal direct liquefaction process

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  • Two-stage hydrogenation based direct coal liquefaction process

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Effect test

Embodiment 1

[0027] (1) Bituminous coal pulverized coal and heavy oil are mixed to form a coal slurry with a pulverized coal content of 30wt%. After mixing 0.03wt% iron sulfide catalyst into the coal slurry, it is sent together with hydrogen into a 10L primary reactor for reaction. The reaction pressure is 15MPa, hydrogen partial pressure is 10MPa, reaction temperature is 420℃, space velocity is 0.25h -1 , the reaction is completed to obtain a first-order reaction product;

[0028] (2) The primary reaction product is sent to the upper part of the 8L secondary reactor, the gas phase components in the primary reaction product flow out from the top of the secondary reactor, and the solid-liquid components in the primary reaction product Downward flow, the flow rate is controlled at 1-5cm / s, countercurrent contact reaction with the hydrogen gas flowing upward in the secondary reactor, the hydrogen-oil ratio is 600, the reaction pressure is 15MPa, the hydrogen partial pressure is 10MPa, and the...

Embodiment 2

[0031](1) Bituminous coal powder and anthracite coal powder with a weight ratio of 1:1 are mixed with residual oil to form a coal slurry with a total coal powder content of 50wt%, and 5wt% ZnCl is mixed into the coal slurry 2 / S catalyst (where ZnCl 2 It is an active component, S is an auxiliary agent, and the atomic ratio of S and Zn is 0.5), and then sent together with hydrogen into a 10L primary reactor for reaction, the reaction pressure is 20MPa, the hydrogen partial pressure is 15MPa, and the reaction temperature is 460°C , airspeed is 0.25h -1 , the reaction is completed to obtain a first-order reaction product;

[0032] (2) The primary reaction product is sent to the upper part of the 8L secondary reactor, the gas phase components in the primary reaction product flow out from the top of the secondary reactor, and the solid-liquid components in the primary reaction product Downward flow, the flow rate is controlled at 6-10cm / s, countercurrent contact reaction with the...

Embodiment 3

[0035] (1) A mixture of sub-bituminous coal powder, heavy oil and residual oil with a weight ratio of 1:1 is mixed to form a coal slurry with a coal powder content of 40wt%, and 2wt% of iron-molybdenum metal catalyst (including iron, molybdenum The atomic ratio is 50) and sent together with hydrogen into a 10L primary reactor for reaction, the reaction pressure is 18MPa, the hydrogen partial pressure is 14MPa, the reaction temperature is 440°C, and the space velocity is 0.25h -1 , the reaction is completed to obtain a first-order reaction product;

[0036] (2) The primary reaction product is sent to the upper part of the 8L secondary reactor, the gas phase components in the primary reaction product flow out from the top of the secondary reactor, and the solid-liquid components in the primary reaction product Downward flow, the flow rate is controlled at 3-7cm / s, countercurrent contact reaction with the hydrogen gas flowing upward in the secondary reactor, the hydrogen-oil rati...

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Abstract

The invention discloses a two-stage hydrogenation based direct coal liquefaction process. The process comprises the following steps: subjecting coal slurry obtained by mixing pulverized coal with a hydrogen-donor solvent, hydrogen and a catalyst to reaction in a primary reactor at a reaction temperature of 420-460 DEG C, sending a primary reaction product to the upper part of a secondary reactor, enabling a gas phase component in the primary reaction product to flow out from the top of the secondary reactor, enabling solid and liquid components in the primary reaction product to flow down in the secondary reactor to carry out countercurrent contact reaction with hydrogen flowing up at a reaction temperature of 430-480 DEG C, and separating the product after the reaction ends. The process has the beneficial effects that the gas content of gases which do not participate in reaction in the secondary reactor can be reduced below 15%, thus obviously improving the production efficiency of direct coal liquefaction. The process is suitable for the large-scale direct coal liquefaction industry.

Description

technical field [0001] The invention relates to a two-stage hydrogenation coal direct liquefaction process, belonging to the technical field of coal direct liquefaction. Background technique [0002] Coal direct liquefaction is a technology that directly converts coal into liquid fuel through catalytic hydrogenation under high temperature and high pressure. At present, a variety of coal direct liquefaction processes have been successfully developed in the world, including the German IGOR process, the American H-Coal process, and the Japanese NEDOL process. and China Shenhua Craft. Among them, China Shenhua Technology built a 6,000-ton / day industrial demonstration device in 2008 and put it into use. [0003] Through long-term research, it has been found that in the direct liquefaction of coal, a large amount of pre-asphaltenes, asphaltenes and some small molecular hydrocarbons, CO 2 , CO and other gases, and then the pre-asphaltene and asphaltene will continue to be hydroge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/08
CPCC10G1/083
Inventor 井口宪二坂脇弘二
Owner 任相坤
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