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Magnesium-aluminum-carbon composite support sulfur-tolerant shift catalyst and preparation method thereof

A technology for sulfur-resistant conversion and catalysts, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., and can solve the problems affecting catalytic activity and stability, and carrier phase structure Changes, anti-sulfurization active components and other issues, to achieve good economic benefits, low production cost, simple production process

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, with the advancement of coal gasification technology, its high temperature (over 480 °C), high water-gas ratio, low sulfur (H 2 When applied under the condition of S lower than 0.05%, it is prone to the phenomenon of carrier phase structure change, reverse vulcanization and aggregation of active components, which affects the catalytic activity and stability

Method used

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  • Magnesium-aluminum-carbon composite support sulfur-tolerant shift catalyst and preparation method thereof
  • Magnesium-aluminum-carbon composite support sulfur-tolerant shift catalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] First, the industrial furfural slag is roasted at 70°C for 5 hours, and then crushed through a 120-mesh sieve to obtain pretreated furfural slag. Dissolve 8.6g of ammonium molybdate with 45.0mL of deionized water to obtain solution A containing molybdenum; dissolve 15.5g of cobalt nitrate with 100.0mL of deionized water; then add 8.0g of citric acid into the above solution, stir and dissolve to obtain Solution B containing cobalt.

[0049] Weigh 129.9g of pretreated furfural slag, 8.2g of magnesia, 29.8g of pseudoboehmite, 3.0g of Tianqing powder and mix evenly, add solution A, knead evenly; then add solution B, knead, shape, and let it dry naturally Dry, then roast. The heating process adopts a gradient heating method, from 20°C to 200°C over 1 hour, and then keep the temperature at 200°C for 1 hour; then raise the temperature to 550°C over 1 hour, roast for 3 hours, and then cool down naturally to room temperature to obtain the sulfur-tolerant shift catalyst C-1 . ...

Embodiment 2

[0051] First, the industrial furfural slag is roasted at 65°C for 7 hours, and then crushed through a 120-mesh sieve to obtain pretreated furfural slag. Dissolve 12.3g of ammonium molybdate in 50.0mL of deionized water to obtain ammonium molybdate solution A; dissolve 19.4g of cobalt nitrate in 100.0mL of deionized water, then add 5.0g of citric acid into the above cobalt nitrate solution, stir to dissolve , to obtain solution B containing cobalt.

[0052] Weigh 151.5g of pretreated furfural slag, 15.6g of magnesium oxalate, 15.4g of pseudoboehmite, and 3.0g of starch and mix evenly, add solution A, and knead evenly; then add solution B, knead, shape, and dry naturally. Re-roast. The heating process adopts a gradient heating method, from 20°C to 200°C over 1 hour, and at 200°C for 1 hour at a constant temperature; then after 1 hour, the temperature is raised to 530°C, calcined for 3 hours, and naturally lowered to room temperature to obtain the sulfur-tolerant shift catalyst ...

Embodiment 3

[0054] First, the industrial furfural slag is roasted at 70°C for 5 hours, and then crushed through a 120-mesh sieve to obtain pretreated furfural slag. Dissolve 11.0g of ammonium molybdate in 40.0mL of deionized water to obtain ammonium molybdate solution A; dissolve 11.7g of cobalt nitrate in 50.0mL of deionized water, then add 3.0g of citric acid into the above cobalt nitrate solution, stir to dissolve , to obtain solution B containing cobalt.

[0055] Weigh 108.2g of pretreated furfural slag, 38.8g of magnesium acetate, 39.0g of pseudo-boehmite, 4.0g of sucrose and mix evenly, add solution A, knead evenly; then add solution B, knead, shape, and dry naturally. Re-roast. The heating process adopts a gradient heating method, from 20°C to 200°C in 1 hour, and then keep the temperature at 200°C for 1 hour; then raise the temperature to 550°C in 1 hour, roast for 2 hours, and then cool down to room temperature naturally to obtain the sulfur-tolerant shift catalyst C-3 . The d...

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Abstract

The invention belongs to the technical field of sulfur-tolerant shift, and particularly relates to a magnesium-aluminum-carbon composite support sulfur-tolerant shift catalyst and a preparation method thereof. The active components of the catalyst are selected from binary components of cobalt nitrate and ammonium molybdate; the support raw materials comprise a magnesium-containing powdered compound, an aluminum-containing powdered compound and a furfural residue. According to the sulfur-tolerant shift catalyst disclosed by the invention, the magnesium-aluminum-carbon composite support structure, the cobalt and molybdenum binary active components, and the mixing and kneading method preparation technology are adopted, so that the magnesium-aluminum-carbon composite support sulfur-tolerant shift catalyst has the characteristics of simple preparation technology, low production cost, high crushing strength, appropriate pore volume and specific surface, good resistance to high temperature and the like; the sulfur-tolerant shift catalyst is suitable for the middle-high pressure, high airspeed and high-temperature sulfur-tolerant shift technologic conditions, meets the requirement of a shift section in the novel coal chemical industry on the shift catalyst, and has good economic benefit and good prospect of popularization and application.

Description

technical field [0001] The invention belongs to the technical field of sulfur-resistant shifting, and in particular relates to a magnesium-aluminum-carbon composite carrier sulfur-tolerant shifting catalyst and a preparation method thereof. Background technique [0002] CO conversion technology through CO and H 2 The chemical reaction of O can effectively adjust the hydrogen-to-carbon ratio in the synthesis gas, and it plays an indispensable role in the production process of coal-to-hydrogen, methanol, synthetic ammonia and subsequent chemicals. The high-performance sulfur-tolerant shift catalyst is the technology key. Cobalt-molybdenum-based sulfur-tolerant shift catalysts have achieved outstanding industrial application performance due to their advantages such as wide temperature range, high shift activity, good sulfur resistance and anti-poisoning performance. The active components of such catalysts are generally selected from Group VIII and VIB metal compounds represen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/882C01B3/16
CPCY02P20/52
Inventor 赵庆鲁余汉涛白志敏齐焕东田兆明王昊姜建波薛红霞
Owner CHINA PETROLEUM & CHEM CORP
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