Method for removing mercury in flue gas using V2O5/carbon material catalyst

Abstract

Disclosed is a method for applying a V2O5 / carbon material catalyst to remove mercury in flue gas, which comprises: feeding the catalyst into a fixed bed reactor, controlling the reaction temperature at between 120 and 180DEG C, and inputting atmospheric mercury-bearing flue gas, wherein, the concentration of mercury is 0.5 to 3070mu g / m<3>, and the air speed ranges from 10000 to 100000h<-1>; and the catalyst is the V2O5 / carbon material catalyst, and has the compositions, in weight percentage: 90 to 99.5 percent of carbon material, and 0.5 to 10 percent of vanadium oxide by taking V2O5 as a unit of measurement. The invention has the advantages of rather high catalytic oxidation removal capability to mercury, reducing the running cost and solving the secondary pollution.

Description

technical field

[0001] The invention relates to a method for removing elemental mercury in flue gas, in particular to a method for applying V 2 o 5 A method for removing mercury in flue gas by catalytic oxidation of carbon material catalyst. Background technique

[0002] Coal is the main energy source in my country. In recent years, with the development of my country's economy, the utilization of coal is also increasing. The resulting environmental pollution has also become more prominent, seriously affecting the ecological environment, human health and sustainable economic development. Therefore, efficiently solving the problem of coal-burning pollution is an important part of my country's sustainable energy development. Mercury is one of the harmful heavy metal pollutants released by coal combustion, which will cause great harm to the environment and human body. Although developed countries have invested heavily in related research, economical and effective control tec...

Examples

Embodiment 1

[0015] 1 gram of activated coke with 1 ml of 0.1 mol / L NH 4 VO 3 -H 2 C 2 o 4 The solution was impregnated for 10 hours, then dried at 110°C for 12 hours, and calcined at 500°C for 2 hours under an argon atmosphere to obtain 1wt% V 2 o 5 / Activated coke catalyst.

[0016] The catalyst was packed in a fixed-bed quartz tube reactor, and both ends were fixed with quartz wool. After the catalyst is heated up to 120°C in the reactor, the Hg-containing 0 Simulated flue gas, air velocity 10000h -1 , Constant temperature adsorption for 24h. The simulated flue gas composition is: 6.3% O 2 , 6%H 2 O, 1500ppmSO 2 , N 2 is the balance gas, Hg 0 The concentration is 420μg / m 3 . Similarly, the mercury removal experiment of activated carbon under the same conditions was carried out as a comparison. The experimental results are: the mercury absorption amount of the catalyst reaches 206 μg / g-catalyst in 24 hours, and the mercury absorption amount of activated carbon is 19 μg / g-...

Embodiment 2

[0018] 1 gram of activated coke with 1 ml of 0.05 mol / L NH 4 VO 3 -H 2 C 2 o 4 The solution was soaked for 2 hours, then dried at 110°C for 12 hours, and calcined at 450°C for 5 hours under an argon atmosphere to obtain 0.5wt% V 2 o 5 / Activated coke catalyst.

[0019] The catalyst was packed in a fixed-bed quartz tube reactor, and both ends were fixed with quartz wool. After the catalyst is heated up to 120°C in the reactor, the Hg-containing 0 Simulated flue gas, air velocity 15000h -1 , Constant temperature adsorption for 24h. The simulated flue gas composition is: 6.3% O 2 , 6%H 2 O, 1000ppmSO 2 , N 2 is the balance gas, Hg 0 The concentration is 420μg / m 3 . The experimental result is: the mercury absorption amount of the catalyst reaches 140μg / g-catalyst in 24 hours.

Embodiment 3

[0021] 1 gram of activated carbon fiber

[0022] With 1 mL of 0.5 mol / L NH 4 VO 3 -H 2 C 2 o 4 The solution was impregnated for 5 hours, then dried at 110°C for 12 hours, and calcined at 350°C for 10 hours under an argon atmosphere to obtain 5wt% V 2 o 5 / Activated carbon fiber catalyst.

[0023] The catalyst was packed in a fixed-bed quartz tube reactor, and both ends were fixed with quartz wool. After the catalyst is heated up to 120°C in the reactor, the Hg-containing 0 Simulated flue gas, air velocity 10000h -1 , Constant temperature adsorption for 24h. The simulated flue gas composition is: 6.3% O 2 , 6%H 2 O, 1500ppmSO 2 , N 2 is the balance gas, Hg 0 The concentration is 420μg / m 3 . The experimental result is: the mercury absorption amount of the catalyst reaches 234μg / g-catalyst in 24 hours.

technical field

[0001] The invention relates to a method for removing elemental mercury in flue gas, in particular to a method for applying V 2 o 5 A method for removing mercury in flue gas by catalytic oxidation of carbon material catalyst. Background technique

[0002] Coal is the main energy source in my country. In recent years, with the development of my country's economy, the utilization of coal is also increasing. The resulting environmental pollution has also become more prominent, seriously affecting the ecological environment, human health and sustainable economic development. Therefore, efficiently solving the problem of coal-burning pollution is an important part of my country's sustainable energy development. Mercury is one of the harmful heavy metal pollutants released by coal combustion, which will cause great harm to the environment and human body. Although developed countries have invested heavily in related research, economical and effective control tec...

Examples

Embodiment 1

[0015] 1 gram of activated coke with 1 ml of 0.1 mol / L NH 4 VO 3 -H 2 C 2 o 4 The solution was impregnated for 10 hours, then dried at 110°C for 12 hours, and calcined at 500°C for 2 hours under an argon atmosphere to obtain 1wt% V 2 o 5 / Activated coke catalyst.

[0016] The catalyst was packed in a fixed-bed quartz tube reactor, and both ends were fixed with quartz wool. After the catalyst is heated up to 120°C in the reactor, the Hg-containing 0 Simulated flue gas, air velocity 10000h -1 , Constant temperature adsorption for 24h. The simulated flue gas composition is: 6.3% O 2 , 6%H 2 O, 1500ppmSO 2 , N 2 is the balance gas, Hg 0 The concentration is 420μg / m 3 . Similarly, the mercury removal experiment of activated carbon under the same conditions was carried out as a comparison. The experimental results are: the mercury absorption amount of the catalyst reaches 206 μg / g-catalyst in 24 hours, and the mercury absorption amount of activated carbon is 19 μg / g-...

Embodiment 2

[0018] 1 gram of activated coke with 1 ml of 0.05 mol / L NH 4 VO 3 -H 2 C 2 o 4 The solution was soaked for 2 hours, then dried at 110°C for 12 hours, and calcined at 450°C for 5 hours under an argon atmosphere to obtain 0.5wt% V 2 o 5 / Activated coke catalyst.

[0019] The catalyst was packed in a fixed-bed quartz tube reactor, and both ends were fixed with quartz wool. After the catalyst is heated up to 120°C in the reactor, the Hg-containing 0 Simulated flue gas, air velocity 15000h -1 , Constant temperature adsorption for 24h. The simulated flue gas composition is: 6.3% O 2 , 6%H 2 O, 1000ppmSO 2 , N 2 is the balance gas, Hg 0 The concentration is 420μg / m 3 . The experimental result is: the mercury absorption amount of the catalyst reaches 140μg / g-catalyst in 24 hours.

Embodiment 3

[0021] 1 gram of activated carbon fiber

[0022] With 1 mL of 0.5 mol / L NH 4 VO 3 -H 2 C 2 o 4 The solution was impregnated for 5 hours, then dried at 110°C for 12 hours, and calcined at 350°C for 10 hours under an argon atmosphere to obtain 5wt% V 2 o 5 / Activated carbon fiber catalyst.

[0023] The catalyst was packed in a fixed-bed quartz tube reactor, and both ends were fixed with quartz wool. After the catalyst is heated up to 120°C in the reactor, the Hg-containing 0 Simulated flue gas, air velocity 10000h -1 , Constant temperature adsorption for 24h. The simulated flue gas composition is: 6.3% O 2 , 6%H 2 O, 1500ppmSO 2 , N 2 is the balance gas, Hg 0 The concentration is 420μg / m 3 . The experimental result is: the mercury absorption amount of the catalyst reaches 234μg / g-catalyst in 24 hours.