Coal direct hydro-liquefaction method

A hydrogenation liquefaction, direct technology, applied in the preparation of liquid hydrocarbon mixtures, petroleum industry, etc., can solve the problems of thick reactor wall, difficult manufacturing, high cost, etc., to shorten the reaction time, improve the utilization rate, and avoid manufacturing Effect

Inactive Publication Date: 2011-11-09
杨元一 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the need to use high temperature and high pressure multi-phase circulating pumps and large high temperature and high pressure reactors in the prior art for direct coal hydrogenation liquefaction methods, the reactor wall thickness is large, the tonnage is heavy, and the manufacturing diff

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Examples

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Embodiment 1

[0031] use figure 1 As shown in the process flow, the above-mentioned coal sample is dried and pulverized into coal powder of about 200 meshes, mixed with Shengli heavy oil and catalyst, the mixing ratio is coal: heavy oil: catalyst = 55:43:2 (weight ratio), at 160°C After swelling by stirring for 20 minutes, a stable and pumpable oil-coal slurry was formed. The oil-coal slurry is sent into a tubular reactor at a flow rate of 10,000kg / h using a high-pressure pump. The flow state in the tubular reactor is turbulent, with a diameter of Φ55mm, a length of 500m, and a reaction temperature of 380-460°C , the hydrogen partial pressure is 20MPa. Hydrogen is respectively from the entrance of the tubular reactor, 60m (accounting for 12% of the total length), 150m (accounting for 30% of the total length), 250m (accounting for 50% of the total length) and 350m (accounting for 70% of the total length) from the entrance of the tubular reactor Injection at five points, the amount of injec...

Embodiment 2

[0036] use figure 1 As shown in the process flow, the above-mentioned coal sample is dried and pulverized into coal powder of about 200 mesh, mixed with Shengli heavy oil and catalyst, the mixing ratio is coal: heavy oil: catalyst = 40:57:3 (weight ratio), at 160°C After swelling by stirring for 20 minutes, a stable and pumpable oil-coal slurry was formed. The oil-coal slurry is sent into a tubular reactor at a flow rate of 20,000kg / h using a high-pressure pump. The flow state in the tubular reactor is turbulent, with a diameter of Φ219mm, a length of 250m, and a reaction temperature of 380-460°C , the hydrogen partial pressure is 20MPa. Hydrogen respectively from the entrance of the tubular reactor, 40m (accounting for 16% of the total length), 90m (accounting for 36% of the total length), 150m (accounting for 60% of the total length) and 200m (accounting for 80% of the total length) from the entrance of the tubular reactor Injection at 5 points, the amount of hydrogen inje...

Embodiment 3

[0038] use figure 1 As shown in the process flow, the above-mentioned coal sample is dried and pulverized into coal powder of about 200 meshes, mixed with Shengli heavy oil and catalyst, the mixing ratio is coal: heavy oil: catalyst = 25:67:8 (weight ratio), at 160°C After swelling by stirring for 20 minutes, a stable and pumpable oil-coal slurry was formed. The oil-coal slurry is sent into a tubular reactor at a flow rate of 60,000kg / h using a high-pressure pump. The flow state in the tubular reactor is turbulent, with a diameter of Φ450mm, a length of 90m, and a reaction temperature of 380-460°C , the hydrogen partial pressure is 10MPa. Hydrogen is respectively from the tubular reactor entrance, 9m (accounting for 10% of total length) and 45m (accounting for 50% of total length) from entrance, and the amount of injected hydrogen is respectively 1% by weight, 0.7% by weight, 0.2% by weight of oil-coal slurry. % by weight, the reactor outlet material enters the high-temperat...

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Abstract

The invention provides a coal direct hydro-liquefaction method. According to the method, under a coal direct hydro-liquefaction reaction condition, a raw material mixture containing coal, a catalyst and a solvent contacts hydrogen in a tubular reactor, such that a liquefied product containing liquid hydrocarbon oil is obtained. According to the method, hydrogen is added into the tubular reactor from at least two positions of the tubular reactor. Compared with prior arts, the method employs a small-diameter tubular reactor which is easy to manufacture and to install. With the method provided by the invention, excess hydrogen amount during a reaction process is reduced, the utilance of hydrogen and the reactor is improved, the reaction time is reduced, secondary decomposition of the target product is reduced, and condensing and coking reactions of macro-molecule organic compounds are reduced.

Description

technical field [0001] The invention relates to a coal direct hydrogenation liquefaction method. Background technique [0002] With the increasing shortage of oil resources in the world and the high price of crude oil, how to convert the abundant and cheap coal resources into liquid products to replace oil has become an important development direction for the clean utilization of coal resources. At present, there are two main ways to produce liquid fuels from coal: direct coal liquefaction and indirect liquefaction. The direct liquefaction process is to react the mixture of coal, solvent and catalyst with hydrogen at a certain temperature (400-500°C) and pressure (15-30MPa) to form a liquid product. The catalysts used include cobalt, molybdenum, tungsten, tin, Oxides or halides of iron and lead, etc. Coal direct liquefaction processes mainly include the H-coal process in the United States, the NEDOL process in Japan, the IGOR process in Germany, and the Shenhua process in ...

Claims

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Application Information

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IPC IPC(8): C10G1/08
Inventor 杨元一牛嘉玉侯创业
Owner 杨元一
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