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Catalyst for simultaneously reducing SO2 and NO with CO as well as preparation and application of catalyst

A catalyst, SO2 technology, used in catalyst activation/preparation, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low space velocity and high catalyst reaction temperature, and achieve a simple process. , the effect of increased specific surface area and high reactivity

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, domestic and foreign relevant CO reduction SO 2 There are few patents on NO and NO catalysts, and the catalysts with published patents have the disadvantages of high reaction temperature and low space velocity

Method used

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  • Catalyst for simultaneously reducing SO2 and NO with CO as well as preparation and application of catalyst
  • Catalyst for simultaneously reducing SO2 and NO with CO as well as preparation and application of catalyst
  • Catalyst for simultaneously reducing SO2 and NO with CO as well as preparation and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Will Al 2 o 3 Soak in an appropriate amount of butyl titanate ethanol solution, stir and evaporate to dryness, let stand for 12 hours, dry at 100°C for 12 hours, and roast at 500°C for 4 hours to obtain TiO 2 -Al 2 o 3 Composite carrier;

[0029] TiO 2 -Al 2 o 3 The composite carrier was immersed in an aqueous ferric nitrate solution, stirred and evaporated to dryness, dried at 110°C for 12 hours, and calcined at 600°C for 2 hours to obtain a catalyst loaded with iron oxide, coded as C 1 ;

[0030] The above catalyst was passed through H at 400°C 2 S gas vulcanization for 5 hours.

[0031] In the obtained catalyst, TiO 2 Accounting for 5% of the weight of the carrier; the loading of iron oxide is 5%.

Embodiment 2

[0033] Will Al 2 o 3 Soak in an appropriate amount of ethanol solution of titanium tetrachloride, stir and evaporate to dryness, let stand for 12 hours, dry at 110°C for 8 hours, and roast at 600°C for 2 hours to obtain TiO 2 -Al 2 o 3 Composite carrier;

[0034] TiO 2 -Al 2 o 3 The composite carrier was impregnated in an appropriate amount of cobalt nitrate aqueous solution, stirred and evaporated to dryness, dried at 100°C for 12 hours, and calcined at 500°C for 3 hours to obtain a catalyst supporting cobalt oxide, coded as C 2 ;

[0035] The above catalyst was passed through H at 500°C 2 S gas vulcanization for 3 hours.

[0036] In the obtained catalyst, TiO 215% by weight of support; 10% cobalt oxide loading

Embodiment 3

[0038] Will Al 2 o 3 Soak in an appropriate amount of titanium sulfate aqueous solution, stir and evaporate to dryness, let stand for 12 hours, dry at 120°C for 6 hours, and roast at 400°C for 5 hours to obtain TiO 2 -Al 2 o 3 Composite carrier;

[0039] TiO 2 -Al 2 o 3 The composite carrier was impregnated in an appropriate amount of mixed aqueous solution of cobalt nitrate and ammonium molybdate, stirred and evaporated to dryness, dried at 120°C for 6 hours, and calcined at 400°C for 5 hours to obtain a catalyst supporting cobalt oxide and molybdenum oxide, coded as C 3 ;

[0040] The above catalyst was passed through SO at 500°C 2 / CO gas vulcanization for 5 hours.

[0041] In the obtained catalyst, TiO 2 Accounting for 10% of the weight of the carrier; the loading of cobalt oxide is 10%, and the loading of molybdenum oxide is 10%.

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Abstract

The invention discloses a catalyst for simultaneously reducing SO2 and NO with CO as well as a preparation method of the catalyst. In the catalyst, a TiO2-Al2O3 compound is used as a carrier, wherein the weight of TiO2 accounts for 5-20% of the weight of the carrier; and an active component is one or more of transition metal oxides, and the load amount of the active component is 5-30% based on anoxide by weight. The catalyst is prepared by the following steps: firstly, adopting an immersion method to load TiO2 on Al2O3; and then introducing active component through a precursor solution used for immersing the active component. The catalyst has high activity in the reaction that SO2 and NO are reduced by CO at the same time; and under the lower reaction temperature and high airspeed, the conversion rate of SO2 can reach 98%, and the conversion rate of NO is nearly 100%.

Description

technical field [0001] The invention relates to a simultaneous reduction of SO 2 Catalyst and preparation method thereof of NO and NO, especially relate to a kind of CO reduction SO at the same time 2 Catalyst for NO and NO and its preparation method and application. Background technique [0002] Sulfur dioxide (SO 2 ) and nitrogen oxides (NOx) are the main pollutants in the atmosphere. They can produce acid rain, form photochemical smog, destroy ozone, and bring great harm to the environment and human health. my country is a country where coal is the main energy source, SO in the flue gas emitted by coal-fired power plants 2 NOx and NOx account for 90% of the total, and the rest comes from flue gas emitted from industrial production such as petroleum refining. At present, my country's annual SO 2 The emission of SO has exceeded 25 million tons, becoming the world's largest SO 2 The largest emission country; the annual emission of NOx also exceeds 10 million tons. Des...

Claims

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Application Information

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IPC IPC(8): B01J23/745B01J23/75B01J23/882B01J23/755B01J37/20B01D53/86B01D53/60
CPCY02A50/20
Inventor 王学海方向晨
Owner CHINA PETROLEUM & CHEM CORP
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