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Composition for reducing discharge of NOx in FCC stack gas

A technology for regenerating flue gas and composition, applied in catalytic cracking, petroleum industry, cracking and other directions

Active Publication Date: 2008-11-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Existing transition metal-containing NO reduction x Emission aid for FCC process, NO reduction x Emission performance could be improved

Method used

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  • Composition for reducing discharge of NOx in FCC stack gas
  • Composition for reducing discharge of NOx in FCC stack gas
  • Composition for reducing discharge of NOx in FCC stack gas

Examples

Experimental program
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Effect test

preparation example Construction

[0026]The preparation method of the composition provided by the present invention can adopt any existing method, such as a dipping method, a mixing and gelling method or a combination of the two. For example, prefabricated alumina microspheres can be impregnated with phosphorus-containing compounds, compounds containing the IB and IIB group metal elements, compounds containing the metal additive elements, and compounds containing the rare earth elements, and dried and calcined. Composition particles are obtained; the above compounds can also be added to the slurry containing the oxide carrier (for example, alumina carrier), mixed and beaten, and then spray-dried to obtain microsphere particles, and the composition particles are obtained after roasting; or the above-mentioned One or more of the compounds are added to the slurry containing the oxide carrier (such as alumina), mixed and beaten to form a gel, and spray-dried to obtain microsphere particles. After the microsphere pa...

Embodiment 1-6

[0035] This embodiment illustrates the reduction of flue gas NO provided by the present invention x Preparation of Emission Composition.

[0036] Pseudo-boehmite, phosphorus-containing compound and water are mixed and beaten (the solid content of the slurry is 12% by weight), acidified by adding hydrochloric acid at a ratio of 0.10 by weight of hydrochloric acid and aluminum oxide, beaten, and ferric chloride and / or V 2 o 5 - oxalic acid complex solution (or not), beating, adding rare earth solution, beating, and then spray drying to obtain microsphere particles.

[0037] The microsphere particles are calcined at 600°C for 1 hour in a muffle furnace, then saturated with cupric chloride and / or zinc chloride solution to impregnate the microspheres, then dried at 120°C, and then calcined at 600°C for 1 hour to obtain Compositions A1-A6 provided by the present invention.

[0038] During the preparation of compositions A1-A6, pseudo-boehmite, types and amounts of phosphorus-con...

Embodiment 7-12

[0062] This group of examples illustrates that compositions A1-A6 provided by the invention have a significant effect on NO in catalytic cracking regenerated flue gas. x Effects on emissions and product distribution.

[0063] Compositions A1-A6 were aged for 12 hours at 800° C. under 100% water vapor atmosphere, then mixed with the industrial balancing agent respectively, and evaluated in a small fixed fluidized bed device. In the mixture, the content of the composition of the present invention accounts for 4% by weight of the total weight of the mixture.

[0064]NO in flue gas x The concentration and its changes are listed in Table 5, and the distribution of catalytic cracking products is listed in Table 6.

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Abstract

A combination used for decreasing the discharge of regeneration fume NOx in catalytic cracking comprises the following components according to oxide content by taking the weight of the combination as benchmark: (1) an acid oxide solid support with the weight percentage of 5 to 98.9; (2) phosphorus with the weight percentage of 0.5 to 30; (3) one or a plurality of metal components selected from group IB and IIB with the weight percentage of 0.1 to 35; (4) rare earth metal components with the weight percentage of 0.5 to 30. The combination of the invention is used for catalytic cracking and can reduce the discharge of the regeneration fume NOx with high product yield of catalytic cracking liquid product and low catalyst carbon deposition.

Description

technical field [0001] The invention relates to a method for reducing NO in flue gas x The emission composition, more specifically, relates to a method for reducing NO in catalytic cracking regeneration flue gas x composition of emissions. Background technique [0002] Nitrogen oxides (NO x ) can form acid rain and photochemical smog, destroy the ozone layer, seriously damage human health, and is one of the main pollutants in the atmosphere. x Regulations on emissions are getting stricter. [0003] NO x Mainly from automobile exhaust, power plants and refinery chemical plants. NO emissions from refineries and chemical plants, especially catalytic cracking units x Accounts for about NO in the air x 10% of the total discharge, although much less than other pollution sources, but because of the relatively concentrated discharge, it will cause serious pollution to the environment in the area where it is located. [0004] In the fluid catalytic cracking process, the deact...

Claims

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Application Information

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IPC IPC(8): C10G11/02C10G11/18B01D53/88
Inventor 宋海涛田辉平蒋文斌朱玉霞郑学国唐立文陈蓓艳达志坚张久顺龙军
Owner CHINA PETROLEUM & CHEM CORP
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