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Catalyst for removing nitrogen oxide in FCC stack gas at low temperature and production method thereof

A technology for regenerating flue gas and nitrogen oxides, which is applied in the field of catalysis and can solve problems such as poor removal activity

Active Publication Date: 2011-02-02
SINOPEC NANJING RES INST OF CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The optimal active temperature range of the catalyst in this system is 350°C to 400°C, and NO at lower temperatures (below 220°C) X Poor removal activity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] ① Take 100g Fe 2 o 3 , 30g MnO 2 , 30g CuO kneaded evenly; ②Roast the kneaded material at 300℃~450℃ for 2h~4h; ③Put the roasted material in a colloid mill and add an appropriate amount of water to grind it into a stable slurry with good fluidity; Immerse 100g cordierite honeycomb carrier in the above slurry for 0.5h~1h, take it out and dry it at 100℃~120℃ for more than 12h, and then bake it at 300℃~450℃ for 2h~4h; ⑤Repeat step ④until the weight of the carrier increases by 20g , the prepared catalyst I.

Embodiment 2

[0022] ①Take 100g TiO2 2 , 30g Cr 2 o 3 , 30g CuO kneaded evenly; ②Roast the kneaded material at 300℃~450℃ for 2h~4h; ③Put the roasted material in a colloid mill and add an appropriate amount of water to grind it into a stable slurry with good fluidity; Immerse 100g cordierite honeycomb carrier in the above slurry for 0.5h~1h, take it out and dry it at 100℃~120℃ for more than 12h, and then bake it at 300℃~450℃ for 2h~4h; ⑤Repeat step ④ until the weight of the carrier increases by 40g , the prepared catalyst II.

Embodiment 3

[0024] ① Take equivalent to 100g Fe 2 o 3 of ferric nitrate, equivalent to 20g MnO 2 Manganese nitrate equivalent to 30g CuO and copper nitrate equivalent to 30g CuO were dissolved in water to prepare a mixed solution; ②Immerse 100g cordierite honeycomb carrier in the above solution for 0.5h~1h, take it out and dry it at 100℃~120℃ for more than 12h, then Calcining at 300°C-450°C for 2h-4h; ③repeating step ②until the weight of the carrier increases by 40g, and the prepared catalyst III is obtained.

[0025] The above-mentioned catalysts were packed in a fixed-bed reactor (filling volume: 2 mL) for activity determination. Feed containing NO 500ppm, O 2 3%, n (NH3) / n (NO) 1.0 feed gas (N 2 For the balance gas), the reaction space velocity is 5000h -1 , the reaction pressure is 0.1MPa, and the reaction temperature is 180°C-300°C for NO selective catalytic reduction reaction, and the NO content in the inlet and outlet gas of the reactor is detected online with a trace NO an...

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PUM

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Abstract

The invention provides a catalyst for removing nitrogen oxide in FCC regenerated flue gas at low temperature and a preparation method of the catalyst. The catalyst is prepared by loading metallic oxides including titanium oxide, ferrum oxide, alumina, chromic oxide, manganese oxide, copper oxide and the like onto a faviform carrier. Compared with traditional catalysts that consist of vanadium, molybdenum, titanium and tungsten, the catalyst prepared by the method can remove the nitrogen oxide in the FCC regenerated flue gas at low temperature.

Description

Technical field: [0001] The invention belongs to the technical field of catalysis, and in particular relates to a catalyst for removing nitrogen oxides in FCC regenerated flue gas and a preparation method thereof. The catalyst is used for removing NO in industrial waste gas with high oxygen content at low temperature X . Background technique: [0002] Nitrogen oxides (including NO, NO 2 , N 2 O) is one of the main air pollutants, it and CO 2 The same is the main pollutant causing the greenhouse effect, it and SO 2 It is also the chief cause of atmospheric acidification and acid rain, NO X It is also the main factor that produces photochemical smog. With the development of the economy, human beings have an increasing demand for energy. Automobiles and power plants burn a lot of fuel and emit a lot of waste gas, which contains a lot of SO 2 , NO X , the massive discharge of these pollutants has become a restrictive factor for the sustainable development of human beings....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J23/86B01D53/56
Inventor 魏士新蔡成伟张杰田先国祁德祥吴学其陈长新孙远龙董天雷
Owner SINOPEC NANJING RES INST OF CHEM IND CO LTD
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