Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Supported nano-silver catalyst capable of eliminating formaldehyde at room temperature and preparation method thereof

A technology for eliminating formaldehyde and nano-silver, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems that formaldehyde cannot be eliminated and the required temperature is high, and achieve low cost, no secondary pollution, The effect of good water vapor resistance and longevity

Inactive Publication Date: 2013-06-05
SHANGHAI NAT ENG RES CENT FORNANOTECH
View PDF0 Cites 39 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of the catalyst is relatively simple, the cost is low, and there is no secondary pollution, but the temperature required for the complete conversion of formaldehyde is relatively high, and it cannot be used for the elimination of formaldehyde at room temperature

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 0.0514 g of manganese nitrate and dissolve it in 0.5 ml of deionized water to form a solution, place 0.5 g of ZSM-5 molecular sieve carrier in it, soak in equal volume at 25 °C for 2 h, dry at 120 °C for 6 h, and then roast at 600 °C 2 h, making manganese oxide modified ZSM-5 molecular sieve carrier;

[0022] Weighed 0.0157 g of silver nitrate to make 0.5 ml solution, placed the manganese oxide modified ZSM-5 molecular sieve carrier in it, soaked it at 25 °C for 1 h, dried at 120 °C for 4 h, and calcined at 450 °C for 3 h to obtain the finished catalyst. Where Ag: MnO 2 : ZSM-5 molecular sieve=2:5:100.

[0023] The formaldehyde purification performance of the finished catalyst was evaluated according to the aforementioned test conditions. The initial formaldehyde conversion rate at 20°C was 91.6%, and the formaldehyde conversion rate decreased to 85.2% after 2 hours.

Embodiment 2

[0025] Weigh 0.063 g of cerium nitrate and dissolve it in 0.5 ml of deionized water to form a solution, place 0.5 g of ZSM-5 molecular sieve carrier in it, soak in equal volume at 25 °C for 2 h, dry at 120 °C for 6 h, and then bake at 600 °C 2 h, making cerium oxide modified ZSM-5 molecular sieve carrier;

[0026] Weighed 0.0157 g of silver nitrate to make 0.5 ml solution, placed the ceria-modified ZSM-5 molecular sieve carrier in it, soaked it at 25 °C for 1 h, dried at 120 °C for 4 h, and calcined at 450 °C for 3 h to obtain the finished catalyst. where Ag: CeO 2 : ZSM-5 molecular sieve=2:5:100.

[0027] The formaldehyde purification performance of the finished catalyst was evaluated according to the aforementioned test conditions. The initial formaldehyde conversion rate at 20°C was 92.4%, and the formaldehyde conversion rate decreased to 76.8% after 2 hours.

Embodiment 3

[0029] Weigh 0.076 g of copper nitrate and dissolve it in 0.5 ml of deionized water to form a solution, place 0.5 g of ZSM-5 molecular sieve carrier in it, impregnate in equal volume at 25 °C for 2 h, dry at 120 °C for 6 h, and then bake at 600 °C 2 h, make copper oxide modified ZSM-5 molecular sieve carrier;

[0030] Weighed 0.0157 g silver nitrate to make 0.5 ml solution, put the copper oxide modified ZSM-5 molecular sieve carrier in it, soaked it at 25 °C for 1 h, dried at 120 °C for 4 h, and calcined at 450 °C for 3 h to obtain the finished catalyst. Among them, Ag: CuO: ZSM-5 molecular sieve=2:5:100.

[0031] The formaldehyde purification performance of the finished catalyst was evaluated according to the aforementioned test conditions. The initial formaldehyde conversion rate was 92.9% at 20°C, and the formaldehyde conversion rate decreased to 61.4% after 2 hours.

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

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a supported nano-silver catalyst capable of eliminating formaldehyde at room temperature. The catalyst uses ZSM-5 molecular sieves as carrier, and is prepared by supported nano-silver active components through metallic oxide modifying. The catalyst is composed of, by weight, 1% to 5% of nano-silver active components, 1% to 20% of metallic oxide, and 75% to 98% of ZSM-5 molecular sieves. The invention discloses a preparation method of the supported nano-silver catalyst capable of eliminating the formaldehyde at room temperature. The preparation method is characterized by comprising the following steps: the ZSM-5 molecular sieve carrier is modified, and drying and roasting are carried out to obtain the finished catalyst after the modified carrier is put into a solution to carry out equivalent-volume impregnation at 10 DEG C to 60 DEG C. The airspeed of the catalyst at room temperature is 10000 h-1 hour, the formaldehyde removal rate of the catalyst is up to more than 93.7%, the formaldehyde is catalyzed to be oxidated into harmless water and carbon dioxide to achieve green elimination, and a preparation process is simple, easy to operate, low in cost, and free of secondary pollution.

Description

Technical field [0001] The present invention involves a catalyst and preparation method in the field of purification in chemical and atmospheric environment, especially the load -type nanoscope catalyst and preparation methods involving a room temperature to eliminate formaldehyde. Background technique [0002] Formaldehyde is a kind of volatile organic matter, and it is a colorless, irritating gas with a strong smell.Formaldehyde generally exists in various daily necessities such as decoration materials, furniture, cosmetics, cleaner, insecticides, paper, textile fiber and other daily necessities in people's daily life.The release of formaldehyde in the adhesive of the decoration material is slow. For more than ten years, it often inhale a small amount of formaldehyde, which can cause chronic poisoning, headache, fatigue, mucosal congestion, skin irritation, allergic dermatitis and other systemic symptoms.The removal of formaldehyde has become one of the environmental protection...

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
IPC IPC(8): B01J29/48B01J29/46B01J29/44B01D53/86B01D53/72
Inventor 周洁姚炜刘洋张豪杰何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com