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Two-stage slurry bed hydrogenation process of high temperature coal tar

A high-temperature coal tar and slurry bed technology, applied in the field of coal chemical industry, can solve the problems of reducing the concentration of reactants, increasing hydrogen consumption, and low yield of liquid fuel, so as to improve the conversion rate of hydrogenation, improve product quality, and improve product performance. excellent effect

Active Publication Date: 2015-01-14
任相坤
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is that when coal tar is catalytically hydrogenated in the prior art, it is necessary to use light fractions or diluents to dilute the heavy fractions before hydrogenation, which will reduce the concentration of reactants, resulting in In the process of catalytic hydrogenation, the hydrogen consumption increases, and the yield of liquid fuel is low, so as to provide a kind of hydrogen that can be subjected to fixed bed hydrofinishing and slurry bed hydrocracking for different fractions after appropriate fractionation of high temperature coal tar. Combined hydrogenation process with low consumption and high liquid fuel yield

Method used

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  • Two-stage slurry bed hydrogenation process of high temperature coal tar
  • Two-stage slurry bed hydrogenation process of high temperature coal tar

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Purify the high-temperature coal tar by dehydrating and removing impurities in the purification treatment equipment, and the water content of the high-temperature coal tar after dehydration is less than 0.5wt%;

[0033] (2) Atmospheric distillation of the high-temperature coal tar purified in step (1), cutting into light oil fractions 350°C;

[0034] (3) Combine the heavy oil fraction >350°C in the step (2) with a hydrocracking catalyst, H 2 mixed, wherein the hydrocracking catalyst is a nanoscale material, its composition is 50wt% α-FeOOH, and the balance is γ-Al 2 o 3 , after mixing evenly, enter the first-stage slurry bed and the second-stage slurry bed in turn for two-stage hydrocracking reaction. The conditions of the hydrocracking reaction are as follows: the reaction temperature of the first-stage slurry bed is 350°C, The bed reaction temperature is 350°C, and the other reaction conditions of the first-stage slurry bed and the second-stage slurry bed are: p...

Embodiment 2

[0037] (1) Purify the high-temperature coal tar by dehydrating and removing impurities in the purification treatment equipment, and the water content of the high-temperature coal tar after dehydration is less than 0.5wt%;

[0038] (2) Distilling the high-temperature coal tar purified in step (1) under reduced pressure, and cutting it into light oil fractions 350°C;

[0039] (3) Combine the heavy oil fraction >350°C in the step (2) with a hydrocracking catalyst, H 2 mixing, wherein the hydrocracking catalyst is an oil-soluble nanoscale material, and its composition is 25wt%MoO 3 , 5wt%NiO, the balance is oil-soluble γ-Al 2 o 3 The carrier, after being mixed evenly, enters the first-stage slurry bed and the second-stage slurry bed for two-stage hydrocracking reaction. The conditions of the hydrocracking reaction are as follows: the reaction temperature of the first-stage slurry bed is 400°C, The reaction temperature of the state bed is 400°C, and the other reaction conditions...

Embodiment 3

[0043] (1) In the purification treatment equipment, the mixture of high-temperature coal tar, high-sulfur heavy residue, and high-heavy metal content heavy residue is dehydrated and purified. The mass ratio of the heavy metal content heavy residue oil is 5:0.5:0.5, and the water content of the dehydrated mixture is less than 0.5wt%;

[0044] (2) Atmospheric distillation of the high-temperature coal tar purified in step (1), cutting into light oil fractions 350°C;

[0045] (3) The heavy oil fraction > 350°C in the step (2) is preheated at 100°C, and then combined with a hydrocracking catalyst, H 2 mixed, wherein the hydrocracking catalyst is a nano-scale material, and its composition is 5wt%NiO, 30wt%WO 3 The balance is natural zeolite molecular sieve. After mixing evenly, it enters the first-stage slurry bed and the second-stage slurry bed for two-stage hydrocracking reaction. The conditions of the hydrocracking reaction are as follows: the reaction temperature of the first-s...

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Abstract

The invention provides a two-stage slurry bed hydrogenation process of high temperature coal tar, and belongs to the coal chemical technical field. The two-stage slurry bed hydrogenation process comprises the following steps: (1) performing purification on the high temperature coal tar; (2) performing decompression or atmospheric distillation on the high temperature coal tar purified by the step (1) for cutting into light oil fractions lower than 350DEG C and heavy oil fractions higher than 350 DEG C; (3) mixing the heavy oil fractions higher than 350 DEG C of the step (2) with a hydrocracking catalyst and H2, mixing evenly, and in turn getting into a first stage slurry bed and a second slurry bed for two-stage hydrocracking reaction, and processing the prepared hydrocracking products by fractionation. A liquid fuel prepared by the two-stage slurry bed hydrogenation process of the high temperature coal tar has the advantages of low hydrogen consumption and high product yield.

Description

technical field [0001] The invention relates to a two-stage slurry bed hydrogenation process for high-temperature coal tar, which belongs to the technical field of coal chemical industry. Background technique [0002] Liquid fuels play an important role in various energy sources. Various vehicles, ships, airplanes, construction machinery and other means of transportation all use liquid fuels in large quantities. Liquid fuels are mainly derived from petroleum extracted from the ground. In recent years, with the depletion of world oil resources and the continuous deepening of my country's energy crisis, it has become an urgent task for our country to find reasonable and economical alternative energy sources and change the energy consumption structure. [0003] In the prior art, with the rapid development of my country's iron and steel and coal chemical industries, the output of coal tar is increasing, and the effective utilization of coal tar is becoming more and more import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G69/00
CPCC10G69/00C10G2300/10C10G2300/1037C10G2300/1048C10G2300/4006
Inventor 井口宪二坂脇弘二
Owner 任相坤
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