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Combined use method of high-oxygen-content hydrocarbon hydrogenation catalyst

A hydrogenation catalyst and high oxygen content technology, which is applied in the field of petrochemical industry, can solve the problems of device stoppage, unevenness, increase of flow channel bottleneck pressure drop, etc., and achieve the effect of reducing adsorption amount, avoiding corrosion process, and avoiding pulverization

Inactive Publication Date: 2021-03-26
DONGYING JIEDA CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the operation of the device, the dust is carried by the flow and moves downward along the catalyst bed, and the concentration will cause the porosity of the lower part of the catalyst bed to be severely reduced and uneven, which will induce uneven distribution of the process fluid and easily induce the concentration of the coking reaction. The overall result It is to accelerate the increase of the pressure drop at the flow channel bottleneck of the catalyst bed and generate the hot spot of the operating temperature of the catalyst bed, resulting in a rapid shutdown of the device

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for combined use of hydrogenation catalysts containing high oxygenated hydrocarbons, in which the high oxygenated hydrocarbons are firstly subjected to a pre-hydrogenation process through a non-active oxidation carrier catalyst bed, and the non-active oxide carrier catalyst is used in the pre-hydrogenation deoxygenation process ; The product of the pre-hydrogenation process passes through the subsequent hydrogenation process, and the subsequent hydrogenation process uses an active oxide carrier catalyst.

[0029] The high oxygen-containing hydrocarbons are animal and vegetable oils.

[0030] The pre-hydrogenation process adopts a downflow fixed-bed reactor; the subsequent hydrogenation process adopts a downflow fixed-bed reactor.

[0031] The non-active oxide carrier catalyst includes a silica gel carrier.

[0032] The active oxide carrier catalyst includes an alumina carrier.

[0033] The non-active oxide carrier catalyst and the active oxide carrier catalys...

Embodiment 2

[0038] The difference between this embodiment and above-mentioned embodiment 1 is:

[0039] The high oxygen-containing hydrocarbons are biomass liquefaction oils, including wood tar produced by dry distillation of biomass or liquefied oils produced by hydrogenation liquefaction or hydrothermal liquefaction of biomass.

[0040] The pre-hydrogenation process uses an upflow reactor.

[0041] The non-active oxide carrier catalyst includes activated carbon carrier.

[0042]The active oxide carrier catalyst includes a silica carrier.

[0043] The non-active oxide carrier catalyst and the active oxide carrier catalyst need to support the metal active component iron.

[0044] The operating conditions of the pre-hydrogenation process are: reaction temperature 200°C, pressure 8MPa, hydrogen / stock oil volume ratio 100, hydrogenation catalyst volume space velocity 0.1h -1 .

[0045] The operating conditions of the subsequent hydrogenation process are: reaction temperature 350°C, press...

Embodiment 3

[0047] The difference between this embodiment and above-mentioned embodiment 1 is:

[0048] The high-oxygen hydrocarbons are high-oxygen coal tar or coal liquefaction oil.

[0049] The pre-hydrogenation process uses an expanded bed.

[0050] The non-active oxide carrier catalyst includes a silica gel carrier.

[0051] The active oxide carrier catalyst includes a silica carrier.

[0052] The non-active oxide carrier catalyst and the active oxide carrier catalyst need to support the metal active component cobalt.

[0053] The operating conditions of the pre-hydrogenation process are: reaction temperature 240°C, pressure 15MPa, hydrogen / stock oil volume ratio 1000, hydrogenation catalyst volume space velocity 0.5h -1 .

[0054] The operating conditions of the subsequent hydrogenation process are: reaction temperature 390°C, pressure 15MPa, hydrogen / stock oil volume ratio 1000, hydrogenation catalyst volume space velocity 0.5h -1 .

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Abstract

The invention relates to the technical field of petrochemical engineering, particularly to a combined use method of a high-oxygen-content hydrocarbon hydrogenation catalyst. The method comprises the following steps: carrying out a pre-hydrogenation process on high-oxygen-content hydrocarbons through an inactive oxidation carrier catalyst bed layer, wherein the pre-hydrodeoxygenation uses an inactive oxide carrier catalyst; and carrying out a subsequent hydrogenation process on the pre-hydrogenation process product, wherein an active oxide carrier catalyst is adopted in the subsequent hydrogenation process. According to the invention, reaction materials are heated by utilizing reaction heat release in the pre-hydrogenation process, and the subsequent hydrogenation process is operated undera high-temperature condition, so that the adsorption capacity of the active oxide carrier to acidic raw materials is greatly reduced; and the fine deoxidation process is realized by utilizing the strong adsorption performance of the oxide carrier to the oxygen-containing compound in the subsequent hydrogenation process.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a method for combined use of high-oxygen hydrocarbon hydrogenation catalysts. Background technique [0002] Catalyst carrier, also known as support, is one of the components of the supported catalyst, and is the skeleton of the active component of the catalyst, supporting the active component to disperse the active component, and at the same time increasing the strength of the catalyst. However, the carrier itself generally does not have catalytic activity. [0003] Most carriers are products in the catalyst industry, commonly used are alumina carriers, silica gel carriers, activated carbon carriers, and some natural products such as pumice, diatomaceous earth, etc. [0004] Catalyst supports are divided into oxide supports and non-oxide supports. Oxide supports include alumina, silicon oxide, etc., and non-oxide supports include activated carbon, silica gel, etc....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G3/00
CPCC10G3/50C10G3/46Y02P30/20
Inventor 随石磊范文博
Owner DONGYING JIEDA CHEM TECH