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A low-temperature sulfur-tolerant shift catalyst and its preparation method

A sulfur-tolerant shift and catalyst technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Strong hydration resistance, good stability, good low temperature activity

Active Publication Date: 2020-09-29
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defects of poor stability of existing temperature-resistant sulfur shift catalysts, to provide a low-temperature sulfur-resistant shift catalyst and its preparation method

Method used

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  • A low-temperature sulfur-tolerant shift catalyst and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Mix 186.7g of pseudo-boehmite, 21.84g of solid magnesium hydroxide and 17.1g of cobalt nitrate hexahydrate, and mix evenly in the mixing hopper of the extruder. Weigh 70g of water and add the above-mentioned solid material to mix, and continue to mix in the mixing hopper of the extruder for 1 hour. The material is extruded on an extruder, and the diameter of the formed sample is 3 mm. The molded samples were oven-dried at 120°C and fired at 500°C. The primary carrier is obtained after calcination. Take out 5g of the primary carrier, and impregnate 0.7345g of potassium silicate in equal volume on the primary carrier. After the impregnation is sufficient, the sample is oven-dried at 120°C and calcined at 500°C. After calcination, 0.6278g of ammonium molybdate was impregnated on the sample in an equal volume. After the impregnation was sufficient, the sample was oven-dried again at 120°C and then calcined at 500°C. That is, the low-temperature sulfur-tolerant shift cata...

Embodiment 2

[0046] Mix 186.7g of pseudo-boehmite, 21.84g of solid magnesium hydroxide and 17.1g of cobalt nitrate hexahydrate, and mix evenly in the mixing hopper of the extruder. Weigh 70g of water and add the above-mentioned solid material to mix, and continue to mix in the mixing hopper of the extruder for 1 hour. The material is extruded on an extruder, and the diameter of the formed sample is 3 mm. The molded samples were oven-dried at 120°C and fired at 500°C. The primary carrier is obtained after calcination. Take out 5g of the primary carrier, impregnate 0.8161g of potassium silicate in equal volume on the primary carrier, and after the impregnation is sufficient, dry the sample in an oven at 120°C and bake at 500°C. After calcination, 0.6977g of ammonium molybdate was impregnated on the sample in an equal volume. After the impregnation was sufficient, the sample was oven-dried again at 120°C and then baked at 500°C. That is, the low-temperature sulfur-tolerant shift catalyst C...

Embodiment 3

[0048] Mix 186.7g of pseudo-boehmite, 21.84g of solid magnesium hydroxide and 17.1g of cobalt nitrate hexahydrate, and mix evenly in the mixing hopper of the extruder. Weigh 70g of water and add the above-mentioned solid material to mix, and continue to mix in the mixing hopper of the extruder for 1 hour. The material is extruded on an extruder, and the diameter of the formed sample is 3mm. The molded samples were oven-dried at 120°C and fired at 500°C. The primary carrier is obtained after calcination. Take out 5g of the primary carrier, and impregnate 0.8977g of potassium silicate in equal volume on the primary carrier. After the impregnation is sufficient, the sample is oven-dried at 120°C and calcined at 500°C. After calcination, 0.7675g of ammonium molybdate was impregnated on the sample in equal volume. After the impregnation was sufficient, the sample was oven-dried again at 120°C and then calcined at 500°C. That is, the low-temperature sulfur-tolerant shift catalyst...

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Abstract

The invention relates to the field of water vapor shift reactions, and particularly discloses a low-temperature sulfur-tolerant shift catalyst and a preparation method thereof. The preparation methodcomprises: (1) sequentially molding, drying and calcining the mixture of an aluminum source, a magnesium source and a cobalt source to obtain a primary carrier; and (2) impregnating the primary carrier by using a K2SiO3 aqueous solution, drying, calcining, impregnating with the aqueous solution of a molybdenum source, drying, and calcining. According to the present invention, the impregnating is performed sequentially with the K2SiO3 and the molybdenum source by using the step-by-step impregnation manner, such that the activity of the catalyst is ensured, and the stability of the catalyst is ensured.

Description

technical field [0001] The invention relates to the field of water vapor shift reaction, in particular to a low-temperature sulfur-tolerant shift catalyst, a preparation method of the low-temperature sulfur-tolerant shift catalyst, and a low-temperature sulfur-tolerant shift catalyst prepared by the method. Background technique [0002] CO reacts with water vapor under the action of a catalyst to form CO 2 with H 2 The process is called the water vapor shift (Water Gas Shift, WGS) reaction. Water vapor shift plays a very important role in the chemical industry and is widely used in production processes such as hydrogen production, ammonia synthesis industry, and chemical production using synthesis gas as raw material to adjust the hydrogen-to-carbon ratio. [0003] The water vapor shift process can be divided into (1) high temperature shift (High Temperature Shift, HTS), the commonly used catalyst is Fe-Cr catalyst, and the operating temperature is between 300-500 ° C; (2)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/882C01B3/16
CPCB01J23/882C01B3/16C01B2203/0233Y02P20/52
Inventor 蒋明哲田大勇孙守理
Owner CHNA ENERGY INVESTMENT CORP LTD
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