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Vanadium-based oxide catalyst and application thereof

A technology of oxides and catalysts, applied in the field of vanadium-based oxide catalysts and its applications, can solve the problems of high sulfur content and poor fuel quality, and achieve the effects of low cost, simple preparation method, and excellent anti-SO2 poisoning ability

Inactive Publication Date: 2018-07-03
NINGBO URBAN ENVIRONMENT OBSERVATION & RES STATION NUEORS CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, because the fuel quality of diesel vehicles in my country is generally poor, the sulfur content is relatively high

Method used

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  • Vanadium-based oxide catalyst and application thereof
  • Vanadium-based oxide catalyst and application thereof
  • Vanadium-based oxide catalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Cerium nitrate was used as Ce source, ammonium tungstate was used as W source, titanium sulfate was used as Ti source, ammonium metavanadate was used as V source, oxalic acid was used as co-solvent, and urea was used as slow-release precipitant.

[0043] According to Ce:W:Ti molar ratio is 0.2:0.1:1, cerium nitrate and ammonium tungstate are dissolved in titanium sulfate solution, stir continuously until all dissolve completely, then add excessive precipitating agent urea in this solution, and in 90 Continue to stir for 12 hours under the condition of ℃, then carry out suction filtration and washing, then put the obtained solid in an oven and dry at 110℃ for 12 hours, and then roast in the air at 500℃ for 5 hours in a muffle furnace to obtain powdered cerium tungsten titanium oxide material carrier.

[0044] Dissolve ammonium metavanadate in oxalic acid solution, then follow V 2 o 5 The loading amount is 1wt%, adding cerium tungsten titanium oxide carrier, rotary evap...

Embodiment 2

[0046] Other conditions are as embodiment 1 constant, change Ce:W:Ti mol ratio, make 2% V 2 o 5 / C 0.5 W 0.1 TiO x catalyst.

Embodiment 3

[0048] Other conditions are as embodiment 1 constant, change Ce:W:Ti mol ratio, make 1.5% V 2 o 5 / C 1 W 0.1 TiO x catalyst.

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Abstract

The invention relates to a catalyst, and in particular relates to a vanadium-based oxide catalyst and application thereof, belonging to the technical field of catalysts. The chemical formula of the vanadium-based oxide catalyst is V2O5 / CeaWbTiOx, wherein a, b and x in the V2O5 / CeaWbTiOx are separately atomic ratios relative to Ce, W and O, the data range of a is 0.1-1, the data range of b is 0.05-1, and the data range of x is determined by valence numbers of Ce, W and Ti in the V2O5 / CeaWbTiOx. The vanadium-based oxide catalyst can be applied to tail gas NOx treatment. The vanadium-based oxidecatalyst has the advantages of very excellent low-temperature activity, a very wide temperature window, excellent N2 generation selectivity and excellent anti-SO2 poisoning ability.

Description

technical field [0001] The invention relates to a catalyst, in particular to a vanadium-based oxide catalyst and its application, and belongs to the technical field of catalysts. Background technique [0002] Nitrogen oxides (NO x ) can cause important air pollution problems such as haze, acid rain and photochemical smog, and control NO x Emissions are a major challenge in the field of environmental protection. Since the 1970s, NH 3 Selective Catalytic Reduction of NO x (i.e. NH 3 -SCR) technology is widely used in coal-fired power plants, industrial boilers and other fixed source flue gas denitrification and diesel vehicle exhaust nitrogen oxide purification. The technology is under the action of catalyst, using reducing agent NH 3 NO in flue gas x Selective reduction to N 2 and H 2 O. [0003] Traditional V 2 o 5 -WO 3 -TiO 2 As a commercial SCR catalyst, the catalyst has been used for many years in the field of stationary source denitrification such as coal-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01D53/86B01D53/56
CPCB01D53/8628B01D2251/2062B01D2251/2067B01D2258/0283B01J23/002B01J23/30B01J2523/00B01J2523/3712B01J2523/47B01J2523/69B01J2523/55
Inventor 贺泓单文坡连志华邓华张燕李要彬
Owner NINGBO URBAN ENVIRONMENT OBSERVATION & RES STATION NUEORS CHINESE ACADEMY OF SCI
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