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Sulfur-tolerant shift catalyst and preparation method thereof

A sulfur-resistant conversion and catalyst technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., to achieve the effect of simple preparation method, good activity, and improved catalytic activity and strength

Active Publication Date: 2019-01-15
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Existing methods have improved the catalytic activity and strength of sulfur-tolerant shift catalysts to a certain extent, but still need to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] 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.

[0027] A second aspect of the present invention provides a method for preparing the sulfur-tolerant shift catalyst of the present invention, the method comprising the following steps:

[0028] (1) kneading the cobalt-containing compound, the molybdenum-containing compound, the niobium-containing compound, the carrier precursor and water;

[0029] (2) extruding the product obtained by the kneading, and performing the first drying and the first roasting;

[0030](3) The product obtained in step (2) is subjected to water treatment at 20-150° C. for 0.5-10 hours, and then subjected to second drying and second calcination to obtain a sulfur-tolerant shift catalyst.

[0031] The method provided by the invention does not need to prepare the car...

Embodiment approach

[0042] According to a preferred embodiment of the present invention, the method further includes: introducing a peptizer during the kneading process described in step (1). The present invention has a wide range of options for the type of peptizer, for example, it can be at least one of calcium nitrate, nitric acid, sulfuric acid, oxalic acid, citric acid and acetic acid, preferably calcium nitrate.

[0043] It should be noted that the peptizing agent may partially remain in the catalyst through subsequent treatment, therefore, the catalyst provided by the present invention may contain a small amount of peptizing agent in the form of an oxide.

[0044] According to the present invention, preferably, the peptizing agent is used in an amount of 1-10% by weight of the total weight of the cobalt-containing compound, the molybdenum-containing compound, the niobium-containing compound and the carrier precursor.

[0045] In the present invention, as long as the cobalt-containing compo...

Embodiment 1

[0060] Weigh 65g of pseudoboehmite, 23g of light magnesium oxide, 10g of ammonium heptamolybdate, 15g of cobalt nitrate, 2.5g of niobium pentoxide, 20g of metatitanic acid and 20g of water and knead in a kneader for 30min. Then add 10mL of calcium nitrate solution (concentration: 0.3g / mL), and continue kneading for 1h to form a plastic mixture.

[0061] The above mixture was extruded on an extruder to prepare a strip sample with a diameter of 2.5 mm. Then dry in an oven at 120°C for 12h, and bake at 500°C for 3h to obtain the sample;

[0062] The above sample was put into a beaker and subjected to water treatment at 25°C for 5 hours; then taken out and subjected to second drying at 120°C for 12 hours, and second calcination at 700°C for 3 hours to obtain a sulfur-tolerant shift catalyst.

[0063] The composition of the catalyst is: 4.8% by weight Co 2 o 3 , 9.2 wt% MoO 3 , 2.7 wt% Nb 2 o 5 , 8 wt% TiO 2 , 47.3 wt% Al 2 o 3 and 28% by weight MgO.

[0064] Catalyst str...

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PUM

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Abstract

Relating to the field of catalysts for water-gas shift reaction, the invention discloses a sulfur-tolerant shift catalyst and a preparation method thereof. The sulfur-tolerant shift catalyst containsa carrier, a metal active component and an active assistant. The metal active component is composed of a cobalt oxide and a molybdenum oxide. And the catalyst is characterized in that the active assistant is a niobium oxide. The method includes: (1) mixing and kneading a cobalt element-containing compound, a molybdenum element-containing compound, a niobium element-containing compound, a carrier precursor and water; (2) subjecting the mixing and kneading product to extrusion moulding, and conducting first drying and first roasting; and (3) conducting water treatment on the product obtain in step (2) at 20-150DEG C for 0.5-10h, and then conducting second drying and second roasting, thus obtaining the sulfur-tolerant shift catalyst. The preparation method of the catalyst provided by the invention is simple, and the obtained catalyst has high activity and good strength.

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 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 shift catalyst and low temperature sulfur resistant shi...

Claims

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Application Information

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IPC IPC(8): B01J23/887
CPCB01J23/002B01J23/8877B01J2523/00B01J2523/22B01J2523/31B01J2523/47B01J2523/56B01J2523/68B01J2523/845
Inventor 邓甜音田大勇蒋明哲赵华博孙守理
Owner CHNA ENERGY INVESTMENT CORP LTD