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Hydrocarbon Steam Reforming Catalyst Low Purity Hydrogen Reduction Method

A catalyst and steam technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problem of high catalyst reduction costs, reduce procurement costs, reduce device start-up costs, and speed up start-up speed Effect

Active Publication Date: 2020-07-10
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a low-purity hydrogen reduction method for hydrocarbon steam reforming catalysts, which can be used in hydrocarbon steam reforming devices in the petrochemical industry to solve the problem of high catalyst reduction costs and make full use of by-product low-purity hydrogen. Reduced plant operating costs for conversion catalyst activation

Method used

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  • Hydrocarbon Steam Reforming Catalyst Low Purity Hydrogen Reduction Method
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  • Hydrocarbon Steam Reforming Catalyst Low Purity Hydrogen Reduction Method

Examples

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Effect test

Embodiment 1

[0035] The present invention is applied to a certain hydrocarbon steam reforming hydrogen production device with a hydrogen production capacity of 10000Nm 3 / h, using the traditional process flow of PSA purification method. The device uses Z417 / Z418 catalyst, and the catalyst loading ratio is 1:1. The enterprise uses n-butane oxidation to produce maleic anhydride without additional hydrogen sources. By adopting the method of the invention, a small amount of low-purity hydrogen produced in the process of oxidative dehydrogenation of n-butane is used to reduce and activate the catalyst.

[0036] The raw materials are unreacted n-butane, some C3 and C4 olefins and 20-22% hydrogen.

[0037] Establish a cycle: raw material—hydrogenation—desulfurization—conversion—transformation. After transformation, most of the process gas returns to the hydrodesulfurization inlet, and a small part is discharged to the flare or fuel gas system. Control the ratio of hydrocarbon feedstock and ste...

Embodiment 2

[0040] The present invention is applied to a certain hydrocarbon steam reforming hydrogen production device with a hydrogen production capacity of 40000Nm 3 / h, using the traditional process flow of PSA purification method. The device uses Z417 / Z418 catalyst, and the catalyst loading is 4.5:5.5. By adopting the method of the invention, the continuous reforming tail gas is used to reduce and activate the catalyst.

[0041] Raw material is C 1 -C 5 Hydrocarbons and 45-50% hydrogen.

[0042] Establish a cycle: raw material—hydrogenation—desulfurization—conversion—transformation. After transformation, most of the process gas returns to the hydrodesulfurization inlet, and a small part is discharged to the flare or fuel gas system. Control the ratio of hydrocarbon feedstock and steam entering the reformer to H 2 O / C=5.5, reformer inlet temperature 460°C, outlet temperature 650°C, reformer inlet pressure 2.0MPa, feed load 40% of normal production load.

[0043] Analyze the refo...

Embodiment 3

[0045] The present invention is applied to a certain hydrocarbon steam reforming hydrogen production unit with a hydrogen production capacity of 4000Nm 3 / h, using the traditional process of PSA purification method. The device uses Z417 / Z418 catalyst, and the catalyst loading ratio is 1:1. By adopting the method of the invention, the catalytic dry gas is used to reduce and activate the catalyst.

[0046] Raw material is C 1 -C 5 Hydrocarbons and 30-35% hydrogen.

[0047] Establish a cycle: raw material—hydrogenation—desulfurization—conversion—transformation. After transformation, most of the process gas returns to the hydrodesulfurization inlet, and a small part is discharged to the flare or fuel gas system. Control the ratio of hydrocarbon feedstock and steam entering the reformer to H 2 O / C=7, reformer inlet temperature 450°C, outlet temperature 550°C, reformer inlet pressure 1.0MPa, feed load 60% of normal production load.

[0048] Analyze the reforming process gas com...

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Abstract

The invention belongs to the technical field of hydrocarbon steam conversion, and concretely relates to a method for low-purity hydrogen reduction of a hydrocarbon steam conversion catalyst. Low-purity hydrogen undergoes hydrogenation and desulphurization treatment, and then is mixed with steam, the obtained mixture enters a conversion furnace, and reduction activation of the hydrocarbon steam conversion catalyst is completed in a conversion furnace tube. The method has the advantages of solving of the problem of high catalyst reduction cost, full utilization of the byproduct low-purity hydrogen, reduction of the device operating cost for the activation of the conversion catalyst, and acceleration of the device running speed.

Description

technical field [0001] The invention belongs to the technical field of hydrocarbon steam reforming, and in particular relates to a low-purity hydrogen reduction method for a hydrocarbon steam reforming catalyst. Background technique [0002] Most of the hydrocarbon steam reforming catalysts currently on the market, the active component nickel is generally in an oxidation state, and the oxidation state of nickel has no hydrocarbon steam reforming activity, so activation must be performed before using the reforming catalyst. [0003] On the one hand, the purpose of activation is to reduce the inactive nickel oxide to active metal nickel, and on the other hand, it is to remove a small amount of poison contained in the catalyst (such as a small amount of sulfide brought in during the catalyst production process). [0004] The reduction of conversion catalyst is mainly carried out according to the following reactions: [0005] [0006] [0007] [0008] Although the red...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/18B01J23/755
Inventor 王昊薛红霞姜建波白志敏齐焕东梁卫忠
Owner CHINA PETROLEUM & CHEM CORP