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Catalytic cracking oxygen-poor regeneration denitration agent and preparation method thereof

A technology for catalytic cracking and denitration agent, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve problems such as difficulty in popularization, high operating energy consumption, and salt formation in flue equipment

Active Publication Date: 2021-02-12
山东骏飞环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) Selective non-catalytic reduction (SNCR) process is difficult to ensure the reaction temperature and residence time in actual operation, resulting in unstable and low denitrification rate. The average denitrification rate is 30% to 50%, resulting in the process The technology is limited in a wide range and is difficult to popularize
[0007] (2) low temperature O 3 oxidation (LoTOx) process due to the presence of O in operation 3 The disadvantages of escaping and destroying the atmosphere and extremely high energy consumption; at the same time, the biggest disadvantage of this process has not been fundamentally solved from NO x Pollution of the environment, just NO x From air pollution to water pollution
[0008] (3) Selective Catalytic Reduction (SCR) process technology has a high denitrification rate, an average of over 80%, but the investment cost and construction cost are relatively high, and the reducing agent (liquid ammonia) is consumed during operation, and NH is common. 3 Escape, flue equipment salt accumulation and serious corrosion, and the ammonia nitrogen index of the effluent sewage exceeding the standard
However, due to the NO in the oxygen-poor regeneration process x The formation mechanism is completely different from oxygen-enriched regeneration, so there are basically no denitrification agent products or technologies suitable for reducing catalytic oxygen-lean regeneration in refineries

Method used

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  • Catalytic cracking oxygen-poor regeneration denitration agent and preparation method thereof
  • Catalytic cracking oxygen-poor regeneration denitration agent and preparation method thereof
  • Catalytic cracking oxygen-poor regeneration denitration agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] This implementation raw material component is as follows:

[0053]

[0054] The preparation method is as follows:

[0055] Take 15 parts of ammonium dihydrogen phosphate to prepare an aqueous solution, add active 855 parts of γ-Al 2 o 3 , stirred, and soaked for 14 hours to obtain the intermediate; the intermediate was dried at 120°C for 4 hours, and then roasted at 550°C for 6 hours to obtain the modified active γ-Al 2 o 3 ;

[0056] Take 30 parts of silver nitrate, 80 parts of cerium nitrite, 10 parts of ferrous nitrate, 25 parts of sulfonated cobalt phthalocyanine, and 5 parts of copper nitrate to form solutions with chemical water and stir evenly; add all the obtained metal solutions to the modified Active γ-Al 2 o 3 Stir evenly in the intermediate product, impregnate for 24 hours, dry at 120°C for 6 hours, and roast at 700°C for 4 hours to obtain the final catalytic cracking oxygen-lean regeneration denitrification agent.

[0057] Equipment: The 2.8 milli...

Embodiment 2

[0069] This implementation raw material component is as follows:

[0070]

[0071] The preparation method is as follows:

[0072] Take 25 parts of ammonium phosphate to prepare an aqueous solution, add active 790 parts of γ-Al 2 o 3 , stirred, and soaked for 24 hours to obtain the intermediate; the intermediate was dried at 160°C for 3 hours, and then roasted at 600°C for 3 hours to obtain the modified active γ-Al 2 o 3 ;

[0073] Get 5 parts of chloroiridic acid, 20 parts of chloropalladic acid, 60 parts of cerium nitrate, 40 parts of lanthanum nitrate, 5 parts of ferrous nitrate, 5 parts of copper nitrate, 50 parts of antimony tartrate respectively and chemical water to be configured into solution and stir evenly; The resulting metal solution is all added to the modified active γ-Al 2 o 3 Stir evenly in the intermediate product, impregnate for 32 hours, dry at 140°C for 6 hours, and roast at 720°C for 4 hours to obtain the final catalytic cracking oxygen-lean regene...

Embodiment 3

[0088] This implementation raw material component is as follows:

[0089]

[0090]

[0091] The preparation method is as follows:

[0092] Take 30 parts of diammonium hydrogen phosphate to prepare an aqueous solution, add 820 parts of active γ-Al 2 o 3 , stirred, and soaked for 18 hours to obtain the intermediate; the intermediate was dried at 140°C for 4 hours, and then roasted at 560°C for 4 hours to obtain the modified active γ-Al 2 o 3 ;

[0093] Take 5 parts of chloroplatinic acid, 15 parts of chloropalladium acid, 50 parts of cerium nitrate, 30 parts of lutetium nitrate, 5 parts of vanadium sol, 5 parts of copper nitrate, and 40 parts of sulfonated phthalocyanine respectively with chemical water and stir them uniformly; All the metal solution is added to the modified active γ-Al 2 o 3 Stir evenly in the intermediate product, impregnate for 30 hours, dry at 180°C for 5 hours, and roast at 750°C for 3 hours to obtain the final catalytic cracking oxygen-lean reg...

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Abstract

The invention relates to a catalytic cracking oxygen-poor regeneration denitration agent and a preparation method thereof, and belongs to the field of catalytic cracking assistants. The catalytic cracking oxygen-poor regeneration denitration agent comprises a carrier and an active component, the carrier is active gamma-Al2O3, and the active component is a noble metal compound, a metal compound anda rare earth element compound; the catalytic cracking oxygen-poor regeneration denitration agent is prepared from the following raw materials in percentage by mass: 70 to 90 percent of active gamma-Al2O3, 1.5 to 5 percent of a noble metal compound, 4 to 10 percent of a rare earth element compound, 3 to 10 percent of a metal compound and 1.5 to 5 percent of phosphate. The catalytic cracking oxygen-poor regeneration denitration agent provided by the invention is high in denitration rate; the using process is easy and convenient to operate, secondary pollution is avoided, smoke can meet the emission standard, economic benefits are high, CO components in a regenerator are not consumed at all, and the safety is high; meanwhile, the invention further provides a preparation method.

Description

technical field [0001] The invention relates to a catalytic cracking oxygen-poor regeneration denitrification agent and a preparation method thereof, belonging to the field of catalytic cracking additives. Background technique [0002] Nitrogen oxides (NO x ) is one of the main air pollutants, which can form acid rain, destroy the atmosphere, and seriously endanger human health. Among them, oil refineries, especially catalytic cracking units, emit NO into the atmosphere due to heavy and inferior raw materials x The proportion is constantly increasing, accounting for about NO x 10% of the total source, so research and control of NO in the FCC process x become more and more important. [0003] As early as the 1990s, developed countries in the world have made great technological progress in flue gas desulfurization and denitrification. For example, the United States, Germany, and Japan have basically completed the transformation of flue gas desulfurization and denitrificati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/96B01J27/185B01D53/56
CPCB01D53/8625B01D53/96B01J27/1856B01J27/1853B01D2251/2062
Inventor 杨大伟谭卫东
Owner 山东骏飞环保科技有限公司
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