Composition for reducing discharge of NOx in regeneration flue gas of fluid catalytic cracking (FCC)

A technology for regenerating flue gas and composition, applied in the direction of chemical/physical process, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of high yield of dry gas and coke, poor performance High-level problems, achieve high conversion rate, low coke and dry gas yield, and reduce adverse effects

Active Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The reduction of NO prepared by the above prior art x Emission compositions or additives which reduce NO x The performance of emissions is not high, and it has a large adverse effect on the distribution of FCC products, and the yield of dry gas and coke is high

Method used

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  • Composition for reducing discharge of NOx in regeneration flue gas of fluid catalytic cracking (FCC)
  • Composition for reducing discharge of NOx in regeneration flue gas of fluid catalytic cracking (FCC)
  • Composition for reducing discharge of NOx in regeneration flue gas of fluid catalytic cracking (FCC)

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preparation example Construction

[0021] A preparation method of the composition provided by the present invention comprises the following steps: preparing a composition slurry containing macroporous pseudo-boehmite and a rare earth element component, spray-drying the composition slurry and roasting to obtain composition particles, and then mixing with Solution contact impregnation containing IIA, IIB, IVB and VIB group non-noble metal element compounds, and then roasting to obtain the described reduction of FCC regeneration flue gas NO x The discharged composition; a part of which is selected from IIA, IIB, IVB and VIB group non-noble metal element compounds can be introduced into the composition slurry before spray drying. When the prepared composition also contains a metal additive component, the additive is introduced during the preparation of the composition slurry containing the macroporous pseudo-boehmite and the rare earth element component or introduced into the composition particles by impregnation ....

Embodiment 1

[0031] This embodiment illustrates that the present invention reduces NO x Preparation of Emission Composition S1.

[0032] Based on the weight of oxides, the composition contains 65% by weight of alumina (30% by weight of alumina derived from conventional pseudo-boehmite, 30% by weight of alumina derived from macroporous pseudo-boehmite, Aluminum oxide derived from aluminum sol is 5% by weight), magnesium oxide is 14% by weight, zirconia (as ZrO 2 Meter) 6% by weight, cerium oxide (as CeO 2 Total) 15% by weight.

[0033]Take by weighing 1.48 kilograms of conventional pseudo-boehmite and 1.23 kilograms of large-pore pseudo-boehmite, add to 7.1 liters of deionized water for beating, then add 1200 milliliters of cerium nitrate aqueous solution that is dissolved with 1135 grams of cerium nitrate, and add 400 milliliters of cerium nitrate under stirring Acidify with dilute hydrochloric acid with a mass concentration of 19.8%, then add 698 grams of aluminum sol, stir evenly, the...

Embodiment 2

[0037] This embodiment illustrates that the present invention reduces NO x Preparation of Emission Composition S2.

[0038] Based on the weight of oxides, the composition contains 70% of alumina (30% by weight of conventional pseudo-boehmite, 40% by weight of macroporous pseudo-boehmite), 0.5% by weight of copper oxide, Zirconia (as ZrO 2 meter) 10% by weight, rare earth oxides (in RE 2 o 3 Total) 19.5% by weight.

[0039] Mix 1.48 kg of conventional pseudo-boehmite and 1.64 kg of macroporous pseudo-boehmite with 7.4 liters of deionized water for beating, add 2170 ml of lanthanum-rich mixed rare earth solution to the resulting slurry and stir, then add 450 ml of lanthanum-rich mixed rare earth solution to a concentration of 19.8 Acidify with weight % dilute hydrochloric acid, stir evenly, spray dry, and roast at 600° C. for 1 hour to obtain carrier M2 for use.

[0040] Weigh 10.6 grams of Zr(NO 3 ) 4 ·5H 2 O and 0.5 g Cu(NO 3 ) 2 ·3H 2 O was dissolved in 36 ml of wa...

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Abstract

The invention provides a non-noble metal composition for reducing discharge of NOx in regeneration flue gas of catalytic cracking. The bulk density of the composition is no more than 0.65 g / ml, and the composition comprises, based on the weight of the composition, in terms of oxides, (1) 50 to 99 wt % of an inorganic oxide carrier, (2) 0.5 to 40 wt % of one non-noble metal or more non-noble metals selected from the group consisting of Group IIA, Group IIB, Group IVB and Group VIB, and (3) 0.5 to 30 wt % of a rare earth element. When the composition prepared in the invention is utilized in FCC, the discharge of NOx in regeneration flue gas can be substantially reduced, low yield of dry gas and coke is obtained, and distribution of FCC products is better.

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 Emissions of non-precious metal compositions. Background technique [0002] In the fluid catalytic cracking (FCC) process, the raw oil and the regenerated catalyst are quickly contacted in the riser for catalytic cracking reaction, and the coke generated by the reaction is deposited on the catalyst to cause its deactivation. Enter the regenerator for burnt regeneration. During the regeneration process, the coke and the sulfur- and nitrogen-containing compounds in the coke will produce CO and SO under the action of regeneration air. x and NO x Pollutants such as CO, SO x and NO x And other pollutant control indicators are becoming increasingly strict, and reducing FCC regeneration flue gas pollution emissions has received more and more attention. [0003] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J23/83B01J23/28C10G11/18C10G11/04
Inventor 宋海涛田辉平蒋文斌朱玉霞达志坚陈蓓艳沈宁元范玉华张久顺
Owner CHINA PETROLEUM & CHEM CORP
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