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Cobalt-molybdenum CO sulfur-tolerant shift catalyst and preparation method thereof

A technology of sulfur-resistant transformation and catalyst, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., which can solve the problems of selectivity and activity reduction, reduction of activity specific surface area, reduction of void ratio of catalyst bed, etc. problems, to achieve good economic benefits, strong anti-CO carbon deposition ability, and promote the effect of implementation and promotion

Active Publication Date: 2021-02-26
青岛联信催化材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the carbon evolution reaction occurs, not only the effective gas components in the synthesis gas will be lost, but also the precipitated carbon will cover the catalyst surface, wrap the catalyst active center, reduce its activity specific surface area, and ultimately lead to a decrease in the selectivity and activity of the catalyst for the CO shift reaction. At the same time, the presence of C powder will also reduce the void ratio of the catalyst bed and lead to an increase in pressure drop; therefore, in order to meet the needs of the development of high-pressure (6.0Mpa and above) pulverized coal gasification technology, reduce the high-pressure, high CO content, and low water-gas ratio process The risk of side reactions of CO carbon evolution during the CO shift reaction process under the same conditions, improving the performance of the catalyst to improve its anti-carbon evolution ability, and finally promoting the long-term stable operation of the sulfur-tolerant shift device has become a technical problem that needs to be solved urgently

Method used

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  • Cobalt-molybdenum CO sulfur-tolerant shift catalyst and preparation method thereof
  • Cobalt-molybdenum CO sulfur-tolerant shift catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Mix 100g of macroporous pseudo-boehmite with 5g of turnip powder evenly, add 30g of zirconium nitrate to form a solution, after aging for 24h, dry at 50°C, and roast at 550°C for 6h to obtain the carrier. Add the carrier to a medium-volume solution prepared by adding 12g of ammonium molybdate, 18g of cobalt nitrate, and 15g of potassium carbonate for impregnation, then dry at 50°C, and roast at 450°C for 4 hours to obtain the finished catalyst.

[0022] The catalyst number is QDB-01H, and its performance comparison is shown in Table 1.

Embodiment 2

[0024] Mix 100g of macroporous pseudo-boehmite with 8.5g of zirconia evenly, add a solution made of 12g of ammonium molybdate and 18g of cobalt nitrate. After drying under high temperature, crushing to 200 mesh, adding squat powder to shape, drying at 50°C, roasting at 550°C for 6 hours to obtain a semi-finished product, impregnated with potassium carbonate solution, and roasting at 450°C for 4 hours to obtain a finished catalyst.

[0025] The catalyst number is QDB-02H, and its performance comparison is shown in Table 1.

Embodiment 3

[0027] Add 100g of macroporous pseudo-boehmite to a solution made of 12g of ammonium molybdate, 18g of cobalt nitrate, and 30g of zirconium nitrate. After aging the resulting slurry or hard mud for 24 hours, dry it at 100°C. After pulverizing to 200 mesh, adding squat powder to shape, drying at 50°C, roasting at 550°C for 6 hours to obtain a semi-finished product, impregnated with potassium carbonate solution, and roasting at 450°C for 4 hours to obtain a finished catalyst.

[0028] The catalyst number is QDB-03H, and its performance comparison is shown in Table 1.

[0029] The performance of catalyst in the embodiment of table 1

[0030]

[0031] Remark:

[0032] (1) Catalyst evaluation conditions:

[0033] Catalyst loading 15g, particle size 8-20 mesh;

[0034] Reaction pressure 6.0MPa, reaction temperature 450°C, dry gas space velocity 3000h -1 , water / dry gas=0.5;

[0035] Raw gas composition: CO 60.00%, CO 2 9.85%, H 2 30.00%, H 2 S+COS 0.15%

[0036] (2) CO c...

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Abstract

The inveniton relates to cobalt-molybdenum CO sulfur-tolerant shift catalyst and a preparation method thereof. A macroporous raw material is selected in the preparation process of the catalyst, and anorganic bonding pore-enlarging agent is added to increase the pore diameter and prevent carbon precipitation in pores; one or more assistants of zirconium, nickel or / and rare earth elements and alkali metal or / and alkaline earth metal are added to inhibit CO carbon evolution reaction; the catalyst is prepared by an impregnation method. The catalyst prepared by the method is suitable for a CO sulfur-tolerant shift device under the process conditions of high-pressure pulverized coal gasification, high CO content and low water-gas ratio, has excellent CO shift activity, and also has the remarkable characteristics of strong CO carbon precipitation resistance and the like.

Description

technical field [0001] The invention relates to a cobalt-molybdenum-based CO sulfur-tolerant shift catalyst, and more specifically relates to a cobalt-molybdenum-based CO sulfur-tolerant shift catalyst suitable for a dry pulverized coal gasification high-pressure (≥6.0MPa) gasification process and a preparation method thereof. Background technique [0002] The raw material gas produced by dry pulverized coal gasification technology has effective gas (CO+H 2 ) high composition, wide range of coal types, long continuous operation period, etc., have been successfully applied in domestic large and medium-sized coal-to-methanol, synthetic ammonia, synthetic oil, ethylene glycol and other devices, and have been affirmed and favored by the industry. [0003] There are many kinds of dry pulverized coal gasification technologies. Typical ones at home and abroad that have a lot of performance in industrial installations are Shell pulverized coal gasification technology, HT-L pulverize...

Claims

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Application Information

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IPC IPC(8): B01J23/887B01J37/02B01J37/08C10J3/46
CPCB01J23/8872B01J23/002B01J37/08B01J37/0201C10J3/46Y02P20/52
Inventor 王利军肖杰飞纵秋云高辉杜伟东
Owner 青岛联信催化材料有限公司
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