Supported catalyzer for low-temperature catalytic combustion of VOCs and method for preparing supported catalyzer for low-temperature catalytic combustion of VOCs

A low-temperature catalysis and catalyst technology, applied in the fields of environmental protection and chemical engineering, can solve the problems of high cost, reduce the loading of precious metal active species, reduce production costs, etc. cost effect

Inactive Publication Date: 2014-11-12
孙超
3 Cites 50 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0004] Aiming at the problem of high cost of traditional noble metal catalysts, a new catalyst RTCC-1 and its preparation method are disclosed. Through the use of TSC-1 mesoporous carbon carrier, based on its unique pore structure ...
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

Abstract

The invention discloses a supported mesoporous carbon catalyzer RTCC-1 for low-temperature catalytic combustion of VOCs and a method for preparing the supported mesoporous carbon catalyzer RTCC-1. Due to the fact that the TSC-1 mesoporous carbon material which has the unique physicochemical property serves as the carrier of the catalyzer, the disadvantages of a traditional catalyzer for catalytic combustion that the active metal load is high and the cost is high are eliminated. The active components of the supported catalyzer, for low-temperature catalytic combustion, prepared with the carrier include one of the precious metal Pd and the precious metal Pt and one or more of copper oxide, cerium oxide, zirconium oxide, silicon oxide and aluminium oxide. The catalyzer has extremely high room-temperature catalytic combustion activity and enables complete catalytic combustion of the VOCs such as formaldehyde, methylbenzene and benzene to be achieved at room temperature or at even lower temperature.

Application Domain

Technology Topic

Examples

  • Experimental program(7)

Example Embodiment

[0013] Example 1
[0014] Pd/SiO 2 /TSC-1 catalyst preparation process:
[0015] Add 10.0 g of tetraethyl orthosilicate to 50 ml of deionized water, add an appropriate amount of Pd(NO 2 ) 2 (NH 3 ) 2 Then use nitric acid to adjust the pH value of the system to 2 to 3, aging for 2 hours to form a gel. Mix the gel with TSC-1 mesoporous carbon molecular sieve and let it stand for 12 hours to adjust Pd:SiO 2 The mass ratio of :TSC-1 is 0.25:25:250. After drying at 80 ℃, the temperature is raised to 500 ℃ under the protection of nitrogen and kept for 6 hours, and finally Pd/SiO is reduced by 350 ℃ in hydrogen atmosphere 2 /TSC-1 catalyst.
[0016] Press 1.0 g into 20-60 mesh Pd/SiO 2 The /TSC-1 catalyst is placed in a quartz reaction tube with a diameter of 5 mm. After mixing the formaldehyde and air, it is passed into the reactor tube and enters the catalytic bed for reaction. The total gas hourly space velocity is 20,000 h -1 The volume content of formaldehyde gas in the total gas is 0.5%, the reaction temperature is 50-60 ℃, the pressure of the reaction system is 0.1 MPa, and the formaldehyde conversion rate is 100%.

Example Embodiment

[0017] Example 2
[0018] Pt/CeO 2 /TSC-1 catalyst preparation process:
[0019] Dissolve 12.0 g cerium nitrate in 60 g deionized water, add an appropriate amount of Pd(NO 2 ) 2 (NH 3 ) 2 Then, add oxalic acid solution under stirring, the ratio of the amount of oxalic acid to cerium nitrate is 2:1, and age at 80°C until the gel is completely formed. Mix the gel with TSC-1 mesoporous carbon molecular sieve and let it stand for 12 hours to control Pt:CeO 2 The mass ratio of :TSC-1 is 0.25:25:250 and the pH value is 8-9. After 8 hours of aging, the gel will be formed. Mix the gel with TSC-1 mesoporous carbon molecular sieve and let it stand for 12 hours to adjust Pt:ZrO 2 The mass ratio of :TSC-1 is 0.25:20:250. After drying at 80 ℃ and roasting under the protection of nitrogen, the temperature is increased to 550 ℃ and kept for 6 hours, and finally Pt/ZrO is reduced by 350 ℃ in hydrogen atmosphere. 2 /TSC-1 catalyst.
[0020] Prepare 1.0 g of 20-60 mesh Pt/ZrO 2 The /TSC-1 catalyst is placed in a quartz reaction tube with a diameter of 5 mm. After mixing the formaldehyde and air, it is passed into the reactor tube and enters the catalytic bed for reaction. The total gas hourly space velocity is 20,000 h -1 The volume content of formaldehyde gas in the total gas is 0.5%, the reaction temperature is 40-45°C, the pressure of the reaction system is 0.1 MPa, and the formaldehyde conversion rate is 100%.

Example Embodiment

[0021] Example 3
[0022] Pd/Al 2 O 3 /TSC-1 catalyst preparation process:
[0023] Add 15.0 g of aluminum isopropoxide to 90 ml of deionized water, and add an appropriate amount of Pd(NO 2 ) 2 (NH 3 ) 2 Then use nitric acid to adjust the pH of the system to 8-10, aging for 2 hours under stirring to form a gel. Mix the gel with TSC-1 mesoporous carbon molecular sieve and let it stand for 12 hours to adjust Pd:Al 2 O 3 The mass ratio of :TSC-1 is 0.25:12.5:250. After drying at 80℃ and baking under the protection of nitrogen, the temperature is raised to 550℃ and kept for 6 hours. Finally, Pd/Al is reduced by 350℃ in hydrogen atmosphere. 2 O 3 /TSC-1 catalyst.
[0024] Prepare 1.0 g of 20-60 mesh Pd/Al 2 O 3 The /TSC-1 catalyst is placed in a quartz reaction tube with a diameter of 5 mm. After mixing the formaldehyde and air, it is passed into the reactor tube and enters the catalytic bed for reaction. The total gas hourly space velocity is 20,000 h -1 The volume content of formaldehyde gas in the total gas is 0.5%, the reaction temperature is 65-70°C, the pressure of the reaction system is 0.1 MPa, and the formaldehyde conversion rate is 100%.
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

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
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

Similar technology patents

Classification and recommendation of technical efficacy words

  • Reduce manufacturing cost
  • Reduce load

Bcencryption (BCE) - a public-key based method to encrypt a data stream

ActiveUS20070180230A1Increase safetyReduce loadData stream serial/continuous modificationUser identity/authority verificationClient-sideSession ID
Owner:KRONOS TECH SYST PARTNERSHIP
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