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

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
Comparison scheme
Effect test

Example Embodiment

[0026]The preparation method of the composition provided by the present invention can adopt any existing method, such as dipping method, mixing gelation method or a combination of the two methods. For example, the preformed 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. To obtain composition particles; or add the above-mentioned compound to the slurry containing the oxide carrier (for example, alumina carrier), mix and beat the slurry, and then spray-dry to obtain microsphere particles, which are calcined to obtain the composition particles; or One or more of the compounds are added to the slurry containing the oxide carrier (such as alumina), mixed and made into a gel, spray-dried to obtain microsphere particles. After the microsphere particles are calcined, the remainin...

Example Embodiment

[0034] Example 1-6

[0035] This example illustrates the reduction of NO in flue gas 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), hydrochloric acid is added at a ratio of 0.10 by weight of hydrochloric acid to alumina to acidify, beaten, and ferric chloride and / or V 2 O 5 -Oxalic acid complex solution (or not added), beating, adding rare earth solution, beating, and then spray drying to obtain microsphere particles.

[0037] The microsphere particles were calcined in a muffle furnace at 600°C for 1 hour, and then saturated with copper 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 The present invention provides compositions A1-A6.

[0038] In the preparation process of composition A1-A6, pseudo-boehmite, type and amount of ph...

Example Embodiment

[0061] Example 7-12

[0062] This group of examples illustrates the effect of the composition A1-A6 provided by the present invention on NO in the catalytic cracking regeneration flue gas x The impact of emissions and product distribution.

[0063] The compositions A1-A6 were aged for 12 hours at 800° C. under a 100% steam atmosphere, and then mixed with the industrial balancer 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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