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Catalyst for inhibiting mercaptan low-temperature sulfur-tolerant shift as well as preparation method and application thereof

A technology of sulfur-resistant shift and catalyst, applied in chemical instruments and methods, chemical elements of heterogeneous catalysts, catalysts for physical/chemical processes, etc., can solve the problem of high mercaptan content

Inactive Publication Date: 2021-02-19
青岛中瑞泰达催化新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Previously, in the CO shift hydrogen production process, the change catalyst was generally cobalt oxide and molybdenum oxide supported on alumina; the conversion rate of CO in the first stage could only reach 90%, and the content of mercaptan in the product was high

Method used

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  • Catalyst for inhibiting mercaptan low-temperature sulfur-tolerant shift as well as preparation method and application thereof
  • Catalyst for inhibiting mercaptan low-temperature sulfur-tolerant shift as well as preparation method and application thereof
  • Catalyst for inhibiting mercaptan low-temperature sulfur-tolerant shift as well as preparation method and application thereof

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preparation example Construction

[0033] The present invention provides the preparation method of the mercaptan-suppressing low-temperature sulfur-resistant shift catalyst described in the technical solution, comprising the following steps:

[0034] Mixing gamma-alumina, soluble zirconium salt, binder and water for the first time to obtain a mixed slurry;

[0035] Carrying out the first roasting of the mixed slurry to obtain the first precursor;

[0036] The cobalt-containing compound, the molybdenum-containing compound, and the potassium-containing compound are mixed with water for a second time to obtain an active metal impregnating solution;

[0037] Immersing the first precursor in an active metal impregnation solution to obtain a second precursor;

[0038] The second precursor is subjected to second calcination to obtain the low-temperature sulfur-tolerant shift catalyst for suppressing mercaptans.

[0039] In the present invention, unless otherwise specified, all raw materials used are commercially ava...

Embodiment 1

[0067] Weigh 500g of γ-alumina (particle size 48~75μm, pore volume 0.2~0.45cm 3 / g, specific surface area 200~350m 2 / g), 20g of simple carbon (particle size 48-75μm) and 30g of cement are dry mixed, and the dry mixing time is 20min, so that they are fully mixed to obtain a dry mix;

[0068] Add 20g of zirconium chloride into 150g of pure water for dissolution to obtain a zirconium chloride solution, then add the zirconium chloride solution to the dry mix, add in batches, stir during the addition until it becomes muddy, install The abrasive tool is extruded through an extruder to obtain a Φ4mm cylindrical body, and the body is dried at 120°C for 2 hours, and then the first calcination is carried out at 450°C for 4 hours to obtain the first precursor;

[0069] Basic cobalt carbonate, ammonium tetramolybdate, potassium carbonate and water are configured into an active metal compound solution, wherein the mass content of cobalt element is 2.5%, the mass content of molybdenum ele...

Embodiment 2

[0073] Weigh 500g of γ-alumina (particle size 48~75μm, pore volume 0.2~0.45cm 3 / g, specific surface area 200~350m 2 / g), 20g attapulgite (particle size 48~75μm) and 30g cement carry out dry mixing, and the dry mixing time is 20min, make it fully mix, obtain dry mix;

[0074] Add 15g of zirconium chloride into 150g of pure water for dissolution to obtain a zirconium chloride solution, then add the zirconium chloride solution to the dry mix, add in batches, stir during the addition until it becomes muddy, install The abrasive tool is extruded through an extruder to obtain a Φ4mm cylindrical body, and the body is dried at 120°C for 2 hours, and then the first calcination is carried out at 450°C for 4 hours to obtain the first precursor;

[0075] Basic cobalt carbonate, ammonium tetramolybdate, potassium carbonate and water are configured into an active metal compound solution, wherein the mass content of cobalt element is 2.5%, the mass content of molybdenum element is 7%, and ...

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Abstract

The invention belongs to the technical field of shift catalysts, and particularly relates to a catalyst for inhibiting mercaptan low-temperature sulfur-tolerant shift as well as a preparation method and application thereof. According to the catalyst provided by the invention, gamma-aluminum oxide with a porous structure is used as a carrier, a metal oxide auxiliary agent and an active metal compound are loaded on the surface of the carrier and in pores, the metal oxide auxiliary agent comprises zirconium oxide, and the metal oxide auxiliary agent can effectively inhibit the generation of mercaptan during CO conversion hydrogen production; the effects of enhancing the stability of a carrier skeleton structure and prolonging the service life of the catalyst are achieved; and when the activemetal compound comprises cobalt oxide, molybdenum oxide and potassium carbonate, high CO conversion rate can be realized.

Description

technical field [0001] The invention belongs to the technical field of shift catalysts, and in particular relates to a low-temperature sulfur-resistant shift catalyst for inhibiting mercaptans and its preparation method and application. Background technique [0002] At present, the process route of coal utilization is mainly carried out through two important directions of coal-to-oil and coal-to-gas. Among them, the process route of coal-to-gas is gas-to-methanol or gas-to-synthetic ammonia, and gas-to-methanol or gas-to-gas The determination of the process route for producing synthetic ammonia all depends on the hydrogen-carbon ratio obtained from the shift reaction in the CO shift hydrogen production process. [0003] Previously, in the process of CO conversion to hydrogen production, the catalysts were generally changed to alumina-supported cobalt oxide and molybdenum oxide; the conversion rate of CO in the first stage could only reach 90%, and the content of mercaptan in...

Claims

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Application Information

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IPC IPC(8): B01J23/887B01J27/232C01B3/16C01B3/48
CPCB01J23/8872B01J27/232B01J2523/00C01B3/16C01B3/48C01B2203/1005C01B2203/1041C01B2203/1052C01B2203/1082C01B2203/1094B01J2523/13B01J2523/31B01J2523/68B01J2523/845Y02P20/52
Inventor 李博郑全利孙海燕胡爱众李友祝
Owner 青岛中瑞泰达催化新材料有限公司
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