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CO (carbon monoxide) sulfur tolerant shift catalyst applicable to high pressure process and preparation method thereof

A technology of sulfur-resistant shift and catalyst, which is applied in the direction of catalytic treatment of combustible gas, etc., can solve the problems of high low-temperature activity, easy loss of potassium, etc., and achieves the effect of good thermal stability, no waste water discharge, and improved thermal stability.

Active Publication Date: 2012-12-26
福建三聚福大化肥催化剂国家工程研究中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main features of the catalyst are: it contains a higher concentration of K 2 CO 3 Accelerator, high activity at low temperature, but has the disadvantage of easy loss of potassium

Method used

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  • CO (carbon monoxide) sulfur tolerant shift catalyst applicable to high pressure process and preparation method thereof
  • CO (carbon monoxide) sulfur tolerant shift catalyst applicable to high pressure process and preparation method thereof
  • CO (carbon monoxide) sulfur tolerant shift catalyst applicable to high pressure process and preparation method thereof

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preparation example Construction

[0029] A method for preparing a CO sulfur-tolerant shift catalyst suitable for a high-pressure process comprises the following steps:

[0030] (1) Mix modified bauxite powder, pseudo-boehmite or aluminum nitrate with CeO 2 After the precursors of the mixture are mixed, they are kneaded with magnesium oxide or magnesium hydroxide to form a mixture;

[0031] (2) Add peptizer, binder, pore-forming agent, extrusion aid to the mixture obtained in step (1), and knead;

[0032] (3) drying the mixture obtained in step (2), extruding, and roasting to obtain the carrier of the catalyst;

[0033] (4) The catalyst carrier obtained in step (3) is impregnated with the proportioned catalyst active components CoO and MoO 3 , after drying and roasting, the finished catalyst is obtained.

[0034] The peptizer in the step (2) is a mixture of one or two of nitric acid and malonic acid, and its addition amount is 5-30% of the total mass of the carrier.

[0035] The binder in the step (2) is a mi...

Embodiment 1

[0041] Preparation of the carrier: 1097g of pseudoboehmite powder and 110g of modified bauxite powder were mixed evenly, and 6.5 grams of cerium nitrate (CeO 2 Accounting for about 0.3% of the total mass) dissolved in 400mL of 20% nitric acid, then added to the mixed powder together to form a gel, then added 360g of magnesium hydroxide and kneaded evenly, added 42g of squid powder, 24g of titanate, 40 g of citric acid was kneaded for 1 hour. The resulting slurry was dried at 110° C. for 1 hour, kneaded uniformly in a kneader, and extruded. The strip was calcined at 550° C. for 4 hours to obtain a catalyst carrier.

[0042] Catalyst preparation: impregnation with equal volume impregnation method, cobalt nitrate containing 3% CoO and MoO containing 8% 3 Ammonium molybdate was prepared as a complex solution, added to the prepared carrier, dried at 120°C for 2 hours, and calcined at 400°C for 2 hours to obtain the finished catalyst.

Embodiment 2

[0044] Preparation of the carrier: 877g of pseudoboehmite powder and 439g of modified bauxite powder were mixed evenly, and 15 grams of cerium nitrate (CeO 2 Accounting for about 1.0% of the total mass) dissolved in 300mL of 30% nitric acid, then added to the mixed powder together to form a gel, then added 295g of magnesium oxide and kneaded evenly, then added 40g of squash powder, 20g of boric acid, 40g of citric acid Knead for 1 hour. The resulting slurry was dried at 80° C. for 1 hour, then kneaded uniformly in a kneader, and extruded. The strip was calcined at 600° C. for 2 hours to obtain a catalyst carrier.

[0045] Catalyst preparation: Cobalt oxalate containing 3% CoO and MoO containing 8% 3 Ammonium molybdate was prepared as a complex solution, added to the prepared carrier, dried at 120°C for 2 hours, and calcined at 400°C for 2 hours to obtain the finished catalyst.

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Abstract

The invention relates to a CO (carbon monoxide) sulfur tolerant shift catalyst applicable to a high pressure process and a preparation method thereof. The CO sulfur tolerant shift catalyst applicable to the high pressure process comprises a carrier and a catalyst active component, wherein the carrier is prepared from the following materials by mass percent: 5-40% of modified bauxite powder, 20-60% of pseudoboehmite or aluminum nitrate, and 10-40% of magnesium oxide or magnesium hydroxide; the catalyst active component comprises CoO, MoO3 and CeO2; and CoO is 0.5-5% of the weight of the catalyst, MoO3 is 1.0-15% of the weight of the catalyst and CeO2 is 0.3-2% of the weight of the catalyst. The preparation method comprises the following steps: raw materials mixing; kneading; strip extruding; roasting; isometric impregnation, and the like. The preparation process is simple and no waste water is discharged. The prepared catalyst carrier has excellent hydration resisting property and strength. The activating temperature of the catalyst is low. Under the conditions of high pressure, high gas to steam ratio and high temperature, the catalyst has excellent thermal stability.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, and more specifically relates to a CO sulfur-tolerant shift catalyst suitable for high-pressure processes and a preparation method thereof. Background technique [0002] At present, the newly built and reformed coal gasification processes using coal or residual oil as raw materials to produce ammonia, hydrogen, and oxo gas require the use of sulfur-tolerant shift technology: that is, the sulfur-containing process gas after gasification is directly transformed without desulfurization, greatly The technological process is simplified, and the energy saving effect is remarkable. The key to this process is the use of carbon monoxide sulfur-resistant shift catalyst, which is mainly used for the shift in the process of producing ammonia synthesis gas, oxo synthesis gas, hydrogen and city gas by gasification of coal, heavy oil or residual oil; it can convert COS Cheng H 2 S; HCN converted to NH 3 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/887C10K3/04
Inventor 江莉龙魏可镁曹彦宁
Owner 福建三聚福大化肥催化剂国家工程研究中心有限公司
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