Treatment method for normal-temperature catalytic ignition of VOCs for self sustaining combustion

A technology of catalytic ignition and treatment methods, applied in the direction of combustion methods, combustion types, incinerators, etc., can solve the problems of small total amount, lack of economic benefits, dispersion, etc., and achieve the effect of protecting the environment and simple process

Active Publication Date: 2020-05-08
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, petrochemical small-scale and pilot-scale test devices produce VOCs containing a certain amount of low unsaturated hydrocarbons, nitrogen oxides, amine-containing gases, and oxygen-containing organic waste gases. The total amount is small and scattered, lacking economic benefits for recycling and comprehensive utilization. It is relatively difficult, and at the same time, the treatment of this kind of exhaust gas often fails to attract enough attention
So far, there is still a lack of catalytic combustion technology for this kind of VOCs exhaust gas at home and abroad, which is considered to have relatively high economic value.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Treatment method for normal-temperature catalytic ignition of VOCs for self sustaining combustion
  • Treatment method for normal-temperature catalytic ignition of VOCs for self sustaining combustion

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0033] This preparation example is used to illustrate the doped noble metal composite oxide catalyst used in the present invention.

[0034] (a) 100g of pseudo-boehmite powder (purchased from Zibo Taiguang Chemical Co., Ltd. GL-1 brand), 20g of cerium-zirconium solid solution (CZ), 4.5g of manganese carbonate, 4g of nickel carbonate and 400g of water in a ball mill (Nanjing Laibu Technology Industrial Co., Ltd. QM model) with 50rpm rotating speed ball milling 2h, obtain the slurry of suspension, then add this slurry and adopt the mode of impregnating to be coated on 1000g honeycomb type cordierite ceramics (purchased from Jiangxi Xingfeng chemical filler company’s square-hole carrier), and dried at 120°C for 24h, and then calcined at 500°C for 6h to obtain γ-Al 2 o 3 Coated honeycomb cordierite support.

[0035] (b) Immerse the carrier obtained in step (a) in an aqueous solution of 1% by weight of palladium chloride for 12h, then dry at 120°C for 4h, and then calcinate at 50...

Embodiment 1

[0037] This example is used to illustrate a method for treating VOCs waste gas containing a certain amount of low unsaturated hydrocarbons by catalytic ignition at room temperature of the present invention.

[0038] The doped noble metal composite oxide catalyst shown in the preparation example was loaded into the reactor, and the catalyst loading was 0.02L, accounting for 80% by volume of the fixed-bed reactor. When the temperature of the catalyst bed in the reactor equipped with the doped noble metal composite oxide catalyst was 33°C, the VOCs waste gas (composition shown in Table 1) and the hydrogen gas of 1.5L / h were mixed with a volume flow rate of 12L / h They are passed into the reactor together, and then 20L / h of air is passed in to make the VOCs exhaust gas catalytically ignite, and the temperature of the catalyst bed rises rapidly to 450°C; it enters the catalytic self-sustained combustion stage, and then stops the introduction of hydrogen and reduces the volume of the ...

Embodiment 2

[0053] This embodiment is used to illustrate a kind of room temperature catalytic ignition of the present invention contains the VOCs waste gas treatment method of a certain amount of low unsaturated hydrocarbons and hydrogen.

[0054] The doped noble metal composite oxide catalyst shown in the preparation example was loaded into the reactor, and the catalyst loading was 0.02L, accounting for 80% by volume of the fixed-bed reactor. When the temperature of the catalyst bed in the reactor equipped with the doped noble metal composite oxide catalyst was 33°C, the VOCs waste gas (composition shown in Table 4) with a volume flow rate of 12L / h was passed into the reactor, and then Introduce 20L / h of air to ignite the VOCs exhaust gas catalytically, and the temperature of the catalyst bed rises rapidly to 450°C; enter the catalytic self-sustaining combustion stage, then adjust the volume flow rate of the VOCs exhaust gas to 6L / h, and feed 75L / h With the volume flow of air, the temper...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a treatment method for normal-temperature catalytic ignition of VOCs for self sustaining combustion in the technical field of waste gas treatment. The treatment method can include the following steps that in the catalytic ignition stage, under the normal temperature and normal pressure, when the temperature of a catalytic bed in a reactor containing a doping type preciousmetal composite oxide catalyst is 30 DEG C to 45 DEG C, VOCs waste gas and H2 are led into the reactor, then air is led, and catalytic ignition of the VOCs waste gas is achieved; and the catalytic self sustaining stage is conducted, H2 is stopped being led in, the feeding flow of the VOCs waste gas is adjusted, the volume flow of the air which is led in is adjusted to 5-30 times of that of VOCs, the reaction is carried out, and the self sustaining combustion reaction of the VOCs waste gas is developed. The method is suitable for treating VOCs waste gas containing a certain amount of unsaturated hydrocarbon, the VOCs waste gas can be treated together with one or more of nitrogen-containing oxide, amine-containing gas and oxygen-containing organic matter gas at the same time. By means of themethod, the VOCs waste gas is ignited under the condition that external auxiliary heating energy is not needed, self sustaining combustion is achieved, the technology is simple, and the environment is better protected.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, and more particularly, relates to a treatment method for self-sustained combustion of VOCs catalyzed and ignited at room temperature. Background technique [0002] Common VOCs purification technologies include condensation method, adsorption method, absorption method, catalytic method, biological method, etc., and these methods are widely used. Among them, the catalytic method is to heat VOCs to the light-off temperature (200-450°C) to realize the catalytic and non-catalytic combustion reactions of VOCs to generate carbon dioxide and water. [0003] Patent CN106979526A provides a low-temperature plasma rapid ignition method for catalytic self-sustained combustion of VOCs at normal temperature and pressure. By placing a catalyst in the discharge area of ​​the plasma reactor, the gas discharge generates a low-temperature plasma after applying a voltage, and the reactor passes through t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): F23G7/07
CPCF23G7/07Y02A50/20
Inventor 杨沙沙王国清王育张利军刘小波彭晖刘俊杰马天石
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap