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A treatment method for organic waste gas containing low-carbon hydrocarbons

A technology of organic waste gas and treatment method, applied in gas treatment, separation methods, chemical instruments and methods, etc., can solve problems such as loss of active sites, decrease in catalytic activity, deactivation, etc., achieve low-cost treatment, and improve high-temperature stability performance , the effect of efficient processing

Active Publication Date: 2022-06-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the long-term high-temperature operation of cerium-based metal-organic framework materials, the active components will still aggregate into large-sized particles, resulting in the loss of active sites and the reduction or deactivation of catalytic activity.

Method used

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  • A treatment method for organic waste gas containing low-carbon hydrocarbons

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Effect test

Embodiment 1

[0027] The organic waste gas containing low carbon hydrocarbons discharged from the sewage treatment plant of a petrochemical enterprise, the maximum waste gas volume is 5000Nm 3 / h, the sulfide concentration is 100-500mg / m 3 , the concentration of non-methane total hydrocarbons is 3000-20000mg / m 3 , where the ethane and propane concentrations are 100-5000 mg / m 3 , the remaining pollutants are mainly benzene series, C4 and above hydrocarbons. The method of the present invention is adopted for processing, and the specific process is as follows:

[0028] Preparation of high-temperature catalytic oxidation catalyst: the Cu-BDC material was placed in a 25% manganese nitrate solution, stirred for 1 hour, filtered, dried at 120 °C for 6 hours, and calcined at 200 °C for 2 hours to obtain MnO 2 / Cu-BDC composites. The γ-Al 2 O 3 Powder, pseudo-boehmite powder, and 0.3mol / L nitric acid solution were mixed in a weight ratio of 1:1:1, and then placed in a ball mill for ball millin...

Embodiment 2

[0032] The organic waste gas containing low carbon hydrocarbons discharged from the sewage treatment plant and tank farm of a petrochemical enterprise, the maximum waste gas volume is 1000Nm 3 / h, the sulfide concentration is 500-5000mg / m 3 , the concentration of non-methane total hydrocarbons is 3000-100000mg / m 3 , in which the concentration of ethane and propane is 100-10000mg / m 3 , the remaining pollutants are mainly benzene series, C4 and above hydrocarbons. The method of the present invention is adopted for processing, and the specific process is as follows:

[0033] Preparation of high-temperature catalytic oxidation catalyst: the Cu-BTC material was placed in a 25% manganese nitrate solution, stirred for 1 hour, filtered, dried at 120 °C for 6 hours, and calcined at 200 °C for 2 hours to obtain MnO 2 / Cu-BTC composite. The γ-Al 2 O 3 Powder, pseudo-boehmite powder, and 0.3mol / L nitric acid solution were mixed in a weight ratio of 1:1:1, and then placed in a ball m...

Embodiment 3

[0037] The organic waste gas containing low carbon hydrocarbons discharged from the sewage treatment plant of a petrochemical enterprise, the maximum waste gas volume is 3000Nm 3 / h, the sulfide concentration is 100-300mg / m 3 , the total non-methane hydrocarbon concentration is 2000-15000 mg / m 3 , in which the concentration of ethane and propane is 100-2000 mg / m 3 , the remaining pollutants are mainly benzene series, C4 and above hydrocarbons. The method of the present invention is adopted for processing, and the specific process is as follows:

[0038] Preparation of high temperature catalytic oxidation catalyst: Cu-MOF-74 material was placed in 25% manganese nitrate solution, stirred for 1 hour, filtered, dried at 120 °C for 6 hours, and calcined at 200 °C for 2 hours to obtain MnO 2 / Cu-MOF-74 composite. The γ-Al 2 O 3 Powder, pseudo-boehmite powder, and 0.3mol / L nitric acid solution were mixed in a weight ratio of 1:1:1, and then placed in a ball mill for ball millin...

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Abstract

The invention relates to a method for treating organic waste gas containing low-carbon hydrocarbons. The waste gas is subjected to low-temperature catalytic oxidation treatment, and the treated gas is then subjected to high-temperature catalytic oxidation treatment. The high-temperature catalytic oxidation catalyst uses honeycomb ceramics as a carrier and is coated with metal oxide / The slurry obtained by mixing the MOFs composite material with the ball mill slurry, the ball mill slurry is prepared by ball milling after mixing activated alumina, pseudoboehmite powder, and dilute nitric acid solution, and the waste gas after treatment is discharged up to the standard. The invention adopts low-temperature catalytic oxidation treatment-high-temperature catalytic oxidation treatment process, which has the characteristics of good treatment effect, good operation stability, stable catalyst activity and the like.

Description

technical field [0001] The invention belongs to the technical field of organic waste gas treatment, and in particular relates to a treatment method for organic waste gas containing low-carbon hydrocarbons. Background technique [0002] Volatile organic pollutants (VOCs) are one of the main pollutants in the atmosphere, and their excessive emissions pose a serious threat to human health and the ecological environment. Catalytic oxidation technology is an effective method to degrade VOCs, and the core of the technology is catalytic oxidation catalyst. The currently widely used VOCs catalytic oxidation catalysts are noble metal catalysts with Pt and Pd as active components, which have good low-temperature (<400 °C) catalytic activity. However, VOCs organic waste gas containing high concentrations of low-carbon hydrocarbons (ethane and propane) is difficult to be completely oxidized under low temperature conditions, and it is necessary to increase the reaction temperature (&...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/86B01D53/44
CPCB01D53/869B01D53/8687B01D2257/7022B01D2255/705B01D2255/2073B01D2255/2065B01D2255/2092Y02A50/20
Inventor 赵磊汪鹏刘忠生王新王筱喃
Owner CHINA PETROLEUM & CHEM CORP