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Sulfur-tolerant shift catalyst modified by titanium compound containing sulfate ion and preparation method thereof

A technology of sulfur-resistant conversion and titanium compounds, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve the effect of simple preparation process, low cost, and improved anti-hydration stability

Active Publication Date: 2022-04-15
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Existing methods have improved the catalytic activity and stability of sulfur-tolerant shift catalysts to a certain extent, but still need to be further improved

Method used

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  • Sulfur-tolerant shift catalyst modified by titanium compound containing sulfate ion and preparation method thereof

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preparation example Construction

[0034] The present invention has no particular limitation on the preparation method of the sulfur-tolerant shift catalyst, as long as the above-mentioned catalyst can be obtained, any preparation method can be used in the present invention.

[0035] A second aspect of the present invention provides a method for preparing a sulfur-tolerant shift catalyst, the method comprising the following steps:

[0036] (1) The carrier is impregnated in the solution containing the coagent precursor and the titanium compound component containing sulfate ions, followed by drying and roasting;

[0037] (2) Immersing the product obtained in step (1) in a solution containing the precursor of the metal active component, followed by drying and calcining in sequence to obtain the sulfur-tolerant shift catalyst.

[0038] A third aspect of the present invention provides a method for preparing a preferred sulfur-tolerant shift catalyst, the method comprising the following steps:

[0039] (1) impregnat...

Embodiment 1

[0071] This example is used to illustrate the sulfur-tolerant shift catalyst provided by the present invention and its preparation method

[0072] Weigh 1.2g of industrial grade titanyl sulfate, 6.5g of magnesium nitrate, and 0.6g of lanthanum nitrate, dissolve in deionized water, impregnate isometrically on 15.5g of alumina balls, dry at room temperature, dry at 120°C for 12h, and roast at 500°C 3h, the modified carrier was obtained.

[0073] Weigh 2.0g of ammonium heptamolybdate and dissolve it with ammonia water, add 1.9g of citric acid and 2.5g of cobalt acetate, stir and dissolve to prepare a co-impregnation solution, then carry out isovolumic impregnation, dry at room temperature, dry at 12°C for 12h, and roast at 500°C 3h, the sulfur-tolerant shift catalyst was obtained.

[0074] The composition of the catalyst is: 77.5% by weight carrier, 3.2% by weight Co 2 o 3 , 8.0 wt% MoO 3 , 5.1% by weight MgO, 0.7% by weight La 2 o 3 and 5.5% by weight titanyl sulfate.

[...

Embodiment 2

[0094] This example is used to illustrate the sulfur-tolerant shift catalyst provided by the present invention and its preparation method

[0095] Weigh 0.45g of industrial-grade titanyl sulfate, 7.6g of magnesium nitrate, and 1.3g of lanthanum nitrate, dissolve them in deionized water, impregnate isometrically on 16.7g of alumina balls, dry at room temperature, dry at 100°C for 8h, and roast at 400°C 5h, the modified carrier was obtained.

[0096] Weigh 1.25g of ammonium heptamolybdate and dissolve it with ammonia water, add 1.8g of citric acid and 0.63g of basic cobalt carbonate, stir and dissolve to prepare a co-immersion water soaking solution, then carry out isovolumic impregnation, dry at room temperature and then dry at 150°C for 10h. Calcined at 600°C for 3 hours to obtain a sulfur-tolerant shift catalyst.

[0097] The composition of the catalyst is: 83.5% by weight carrier, 2% by weight Co 2 o 3 , 5 wt% MoO 3 , 6 wt% MgO, 1.5 wt% La 2 o 3 and 2% by weight titany...

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Abstract

The invention relates to the field of catalysts used in water-gas shift reactions, and discloses a sulfur-tolerant shift catalyst and a preparation method thereof. The sulfur-tolerant shift catalyst contains a carrier and a metal active component loaded on the carrier, and the carrier is modified with sulfate ions titanium compounds and coagents. The method comprises: impregnating the carrier in a solution containing a coagent precursor and a titanium compound containing sulfate ions, followed by drying and roasting; impregnated in the solution of the precursor, followed by drying and calcining in sequence to obtain the sulfur-tolerant shift catalyst. The preparation method of the catalyst provided by the invention is simple and convenient, and the obtained catalyst has high activity and good hydration resistance.

Description

technical field [0001] The invention relates to the field of catalysts used in water-gas shift reactions, in particular to a sulfur-resistant shift catalyst modified by a titanium compound containing sulfate ions and a preparation method thereof. Background technique [0002] Sulfur-tolerant shift reaction is a reaction process that must be experienced in the fields of ammonia synthesis, methanol synthesis, and hydrogen production, and sulfur-tolerant shift catalysts play an essential role in it. With the development of my country's residual oil, heavy oil hydrogenation and coal-to-hydrogen technology, especially the rapid progress of my country's coal chemical technology in recent years, the demand for sulfur-tolerant shift catalysts is more than 2,500 tons per year. [0003] The main components of the sulfur-tolerant shift catalyst are Co, Mo, K, Mg, Al, rare earth and other metals. According to the use temperature, it can be divided into high temperature sulfur resistant...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/053C01B3/16
CPCB01J27/053C01B3/16C01B2203/1052C01B2203/0283Y02P20/52
Inventor 邓甜音蒋明哲李海千赵华博田大勇
Owner CHNA ENERGY INVESTMENT CORP LTD
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