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Cobalt-doped modified vanadium phosphorus oxide supported type catalyst for catalyzing and oxidizing NO and preparation method thereof

A supported catalyst, vanadium phosphorus oxide technology, applied in the field of air pollution control, can solve problems such as impact, and achieve the effect of strong ability, high NO oxidation rate, strong resistance to SO2 and water vapor poisoning

Active Publication Date: 2018-06-08
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the catalytic activity that existing NO uses SCO catalyst to be easily affected by SO 2 Insufficient and water vapor influence, provide a kind of cobalt-doped modified vanadium phosphorus oxide supported catalyst and preparation method of catalytic oxidation NO

Method used

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  • Cobalt-doped modified vanadium phosphorus oxide supported type catalyst for catalyzing and oxidizing NO and preparation method thereof
  • Cobalt-doped modified vanadium phosphorus oxide supported type catalyst for catalyzing and oxidizing NO and preparation method thereof
  • Cobalt-doped modified vanadium phosphorus oxide supported type catalyst for catalyzing and oxidizing NO and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0049] A method for preparing a cobalt-modified vanadium-phosphorus oxide-supported catalyst in this embodiment specifically includes the following steps:

[0050] (1) Preparation of active component Co-VPO

[0051] The first step, weigh a certain amount of ammonium metavanadate (NH 4 VO 3 ) was calcined in a muffle furnace at 435°C for 5.5h to form V 2 o 5 . In the second step, weigh the V prepared in the first step 2 o 5 2g of powder, add it to the organic matter with isobutanol as reducing agent and benzyl alcohol as solvent, including 12ml of isobutanol and 8ml of benzyl alcohol, stir and heat to 140°C and reflux for 2.8h; the third step, to the second step Phosphoric acid (H 3 PO 4 ) and Co(NO 3 ) 2 , where NH 4 VO 3 and H 3 PO 4 The molar ratio is 1, Co(NO 3 ) 2 and NH 4 VO 3 The molar ratio is 0.08, continue stirring and heating to 145°C for reflux for 2h, then perform suction filtration, calcinate the obtained particles at 145°C for 5h, and grind them...

Embodiment 2

[0057] A method for preparing a cobalt-modified vanadium-phosphorus oxide-supported catalyst in this embodiment specifically includes the following steps:

[0058] (1) Preparation of active component Co-VPO

[0059]The first step, weigh a certain amount of ammonium metavanadate (NH 4 VO 3 ) was calcined in a muffle furnace at 447°C for 4.8h to form V 2 o 5 . In the second step, weigh the V prepared in the first step 2 o 5 2g of powder, add it to the organic matter with isobutanol as reducing agent and benzyl alcohol as solvent, including 12ml of isobutanol and 8ml of benzyl alcohol, stir and heat to 146°C and reflux for 3.5h; the third step, to the second step Phosphoric acid (H 3 PO 4 ) and Co(NO 3 ) 2 , where NH 4 VO 3 and H 3 PO 4 The molar ratio is 2, Co(NO 3 ) 2 and NH 4 VO 3 The molar ratio is 0.01, continue to stir and heat to 151°C and reflux for 1.8h, then carry out suction filtration, roast the obtained particles at 149°C for 6h, and then grind them...

Embodiment 3

[0065] A method for preparing a cobalt-modified vanadium-phosphorus oxide-supported catalyst in this embodiment specifically includes the following steps:

[0066] (1) Preparation of active component Co-VPO

[0067] The first step, weigh a certain amount of ammonium metavanadate (NH 4 VO 3 ) was calcined in a muffle furnace at 455°C for 4h to form V 2 o 5 . In the second step, weigh the V prepared in the first step 2 o 5 2g of powder, add it to the organic matter with isobutanol as reducing agent and benzyl alcohol as solvent, including 12ml of isobutanol and 8ml of benzyl alcohol, stir and heat to 155°C and reflux for 3.3h; the third step, to the second step Phosphoric acid (H 3 PO 4 ) and Co(NO 3 ) 2 , where NH 4 VO 3 and H 3 PO 4 The molar ratio is 4, Co(NO 3 ) 2 and NH 4 VO 3 The molar ratio is 0.04, continue stirring and heating to 153°C and reflux for 1.5h, then perform suction filtration, calcinate the obtained particles at 155°C for 5.5h, and grind th...

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Abstract

The invention discloses a cobalt-doped modified vanadium phosphorus oxide supported type catalyst for catalyzing and oxidizing NO and a preparation method thereof, and belongs to the technical field of atmospheric pollution regulation. The catalyst takes TiO2 with a great specific surface area as a carrier and isfor supported withing Co-doped modified vanadium phosphorus oxide, and is prepared through the following method: firstly, roasting TiO2 with great specific surface area to obtain the carrier; taking ammonium metavanadate as a vanadium source, roasting, adding ammonium metavanadate intomixed organic substances of a reducing agent isobutanol and a solvent benzyl alcohol, heating and reflowing; adding phosphoric acid and cobalt nitrate in proportion, heating, reflowing, performing suction filtration, and roasting to prepare a VPO-Co active component; and finally, adding the carrier and VPO-Co active ingredient into distilled water in certain proportion to mix, and performing water-bath evaporation, drying, heating, roasting and grinding to obtain the catalyst. The catalyst prepared by the preparation method has relatively high activity for catalyzing and oxidizing NO, and hasrelatively strong SO2 and H2O steam poison resistance.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, and in particular relates to a Co-doped modified vanadium phosphorus oxide (VPO-Co) supported catalyst for catalytic oxidation of NO and a preparation method thereof. Background technique [0002] Nitrogen oxides (NOx) from coal-fired flue gas x ) is a major cause of air pollution such as acid deposition, photochemical smog and smog. According to the prediction of relevant experts: by the middle of this century, coal consumption will still occupy the largest proportion in my country's primary energy consumption, which shows that my country's purification treatment is based on NO x The main air pollutants still have a long way to go. Strengthening the control of NOx is one of the urgent problems to be solved in my country's air pollution control. [0003] NO contained in coal combustion flue gas x The water-insoluble NO is the main one (the proportion of NO is more than 95%), and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/198B01J37/08B01J37/16B01J37/03B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J23/002B01J27/198B01J37/038B01J37/08B01J37/088B01J37/16B01J2523/00B01J2523/47B01J2523/51B01J2523/55B01J2523/845
Inventor 贾勇顾明言邵娜娜龙红明戴波陈宜华盛广宏郭丽娜田迎春吴胜华
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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