FCC method for reducing NO concentration in regenerated flue gas

A technology for regenerating flue gas and concentration, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of easy deactivation of NO oxidation catalysts, and achieve the effects of saving equipment investment, saving costs, and high NO conversion rate

Active Publication Date: 2020-11-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the NO oxidation catalyst is easily deactivated

Method used

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  • FCC method for reducing NO concentration in regenerated flue gas
  • FCC method for reducing NO concentration in regenerated flue gas
  • FCC method for reducing NO concentration in regenerated flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0031] In the catalytic cracking method provided by the present invention, the NO oxidation catalyst can be prepared according to existing methods, such as forming a mixture containing an oxidation active component and a magnesium oxide component, molding, roasting or molding a material containing a magnesium oxide component , impregnation to introduce oxidation active components, roasting. In one embodiment, the NO oxidation catalyst includes a magnesium component, an oxidation active component and a matrix, which can be obtained by forming a mixture of the magnesium component, an oxidation active component and a matrix, molding, and roasting, or by forming a part comprising Or the mixture of all matrix and magnesium oxide components, impregnated to introduce oxidation active components and then mixed with the rest of the matrix, shaped and roasted. The step of drying may also be included before firing. Based on the dry weight of the NO oxidation catalyst, the content of the...

Embodiment 1

[0066] Under the condition of vigorous stirring, 216g of triethanolamine (TEA), 25.56g of magnesium acetate and 54g of deionized water were added dropwise to 300g of TEOS, and reacted for 40min to obtain the first mixture, and then 300g of TEAOH was added dropwise to the above The second mixture is obtained from the first mixture. The second mixture was aged at 30° C. for 24 h, and then heated at 98° C. for 24 h in an air atmosphere to obtain a gel. The gel was placed in a reaction kettle and reacted at 180° C. for 16 h. Finally, the product was heated up to 600° C. for 10 h in an air atmosphere at a rate of 1° C. per minute and calcined to obtain a calcined product. Dissolve 30.56g of magnesium nitrate hexahydrate in 86.5g of deionized water, impregnate an equal volume on the roasted product, place it at room temperature for aging for 24h, then dry it in the air at 100°C for 12h, and roast at 500°C for 4h to obtain the carrier material of this example. It is the carrier mat...

Embodiment 2

[0070] 284.16g of TEOS, 18.39g of magnesium nitrate hexahydrate and 136.87g of deionized water were mixed to obtain a first mixture. Under the condition of vigorous stirring, 52.11 g of TEA was added dropwise into the first mixture at a rate of 4-6 g per minute to obtain the second mixture. The second mixture was matured at 25° C. for 16 h, and then heated at 99° C. for 24 h in an air atmosphere to obtain a gel. The gel was placed in a reaction kettle and reacted at 190°C for 48h. Finally, the product was heated to 550° C. for 10 h in air at a rate of 1° C. per minute and calcined to obtain a calcined product. Dissolve 61.53g of magnesium acetate in 81.9g of deionized water, impregnate an equal volume on the roasted product, place it at room temperature for aging for 18 hours, then dry it in the air at 120°C for 18 hours, and roast it at 450°C for 5 hours to obtain the carrier material of this example, which is referred to as carrier Material B.

[0071] The specific surfac...

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Abstract

The invention discloses an FCC method for reducing the concentration of NO in regenerated flue gas. The FCC method comprises the following steps: contacting hydrocarbon oil with a catalytic cracking catalyst for a catalytic cracking reaction, separating oil gas obtained by the reaction from a catalyst mixture to obtain an oil gas product and a spent catalyst, separating the oil gas product to obtain catalytic cracking dry gas, and subjecting the spent catalyst and oxygen to a contact reaction for regeneration to obtain catalytic cracking regenerated flue gas and a regenerated catalys, whereinthe regenerated catalyst is cyclically used for a catalytic cracking reaction process; subjecting the catalytic cracking regenerated flue gas to a contact reaction with an NO oxidation catalyst so asto obtain reacted flue gas; and regenerating a spent NO oxidation catalyst with reduced activity, and cyclically applying the regenerated NO oxidation catalyst to contact with FCC regeneration flue gas, wherein catalytic cracking dry gas regeneration is adopted for regeneration of the spent NO oxidation catalyst, and comprises the step that the spent NO oxidation catalyst and the catalytic cracking dry gas are subjected to a contact reaction to obtain the regenerated NO oxidation catalyst and regenerated dry gas. According to the method provided by the invention, dry gas is used for regeneration, the activity of the NO oxidation catalyst can be recovered, a relatively high NO conversion rate is maintained, high-purity hydrogen is not required to be used, and used dry gas can be recycled.

Description

technical field [0001] The invention relates to an FCC method for reducing NO concentration in regeneration flue gas. Background technique [0002] Catalytic cracking is an important processing method of hydrocarbon oil, which usually includes the process of catalytic cracking reaction and catalyst regeneration, in which the catalytic cracking reaction contacts the hydrocarbon oil raw material with the cracking catalyst to obtain oil and gas products and unborn catalysts. After further separation, the oil and gas products can be Products such as dry gas, liquefied petroleum gas, gasoline, diesel oil, and heavy oil are obtained, and the catalyst to be regenerated is regenerated to obtain a regenerated catalyst, and at the same time, regenerated flue gas from catalytic cracking is generated. [0003] In the catalytic cracking (FCC) process, part of the sulfur and nitrogen compounds in the raw material enter the coke during the riser reaction process and deposit on the ungenera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/00C10G55/06B01D53/75B01D53/86B01D53/56
CPCC10G11/00C10G55/06B01D53/8628B01D53/75B01D2255/30B01D2255/2047B01D2258/0283B01D2257/404B01D2257/40B01D2257/302B01D2255/1021B01D2255/1023B01D2255/1025B01D2255/1026B01D2255/1028C10G2400/02C10G2400/04C10G2400/26C10G2300/202
Inventor 姜秋桥林伟杨雪宋海涛关淇元王林
Owner CHINA PETROLEUM & CHEM CORP
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