Ethylene oxide combustion catalyst with double active sites and production and application of ethylene oxide combustion catalyst with double active sites

A combustion catalyst and ethylene oxide technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, combustion method, etc., can solve problems such as hidden dangers, prone to explosion, high safety, etc. , to achieve strong thermal shock resistance and stability, simple and flexible preparation method, and excellent low-temperature activity

Inactive Publication Date: 2020-02-04
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cordierite monolithic catalyst reported on the market has a low-temperature catalytic combustion ability T for ethylene oxide. 90 Generally around 300°C, for example, the catalytic combustion of ethylene oxide at this temperature has a very high safety hazard, and it is very prone to explosion, and the explosive equivalent of ethylene oxide is 2.7 to 5 times that of TNT

Method used

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  • Ethylene oxide combustion catalyst with double active sites and production and application of ethylene oxide combustion catalyst with double active sites
  • Ethylene oxide combustion catalyst with double active sites and production and application of ethylene oxide combustion catalyst with double active sites
  • Ethylene oxide combustion catalyst with double active sites and production and application of ethylene oxide combustion catalyst with double active sites

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Weigh 9.32g of Ce(NO 3 ) 3 ·6H 2 O powder and 5.98g of Mn(NO 3 ) 2 4H 2 O powder was added to a 50ml centrifuge tube, and then 40ml of deionized water was added. After dissolving and mixing evenly, 8.5246g of integral honeycomb cordierite was added and immersed at room temperature for 24 hours; centrifuged at 5000r / min for 10min to obtain precipitates a and above Clear a; take the precipitate a and put it in a vacuum drying oven at 100°C for 1 hour to dry until no water flows out, then put it in a muffle furnace and roast it at 400°C for 4 hours to obtain the precipitate a after roasting; cool the precipitate a after roasting After reaching room temperature, put it into the supernatant a and immerse at room temperature for 24 hours, centrifuge to obtain the precipitate b and supernatant b; take the precipitate b and dry it at room temperature until no water flows out, put it in a muffle furnace and bake it at 400°C for 4 hours to obtain the loaded MnCe Composit...

Embodiment 2

[0046] (1) Weigh 9.32g of Ce(NO 3 ) 3 ·6H 2 O powder, 5.98g of Mn(NO 3 ) 2 4H 2 Add O powder and 4.82g citric acid to a 100ml beaker, add 50ml deionized water, mix evenly, stir and evaporate in a water bath at 90°C to form a gel, then dry at 110°C for 6h to form a fluffy gel, and finally remove the formed gel The glue was placed in a muffle furnace and calcined at 400° C. for 4 hours to obtain 2.52 g of MnCe powder.

[0047] (2) Take by weighing 0.5g PVP (polyvinylpyrrolidone) as a dispersant, 0.05g sodium borohydride as a reducing agent, 200uL of 150g / L aqueous palladium chloride solution, add 40ml of deionized water, and stir for 30min to prepare Pd nanoparticles , washed twice with acetone and then fully shaken and mixed with 18ml of absolute ethanol to obtain 20.18g of uniformly dispersed Pd nano-sol, and the mass of metal palladium was 0.03g.

[0048] (3) Add 2.52g of MnCe powder to 20.18g of Pd nano-sol, evaporate to dryness in a water bath at 90°C, force the Pd na...

Embodiment 3

[0051] Weigh Mn(NO 3 ) 2 4H 2 O powder 3.84g and Ce(NO 3 ) 3 ·6H 2 O powder 10.46g, other operation is the same as embodiment 1, obtains Pd / MnCe catalyst 9.125g, is recorded as Pd / Mn 1 Ce 2 , the mass loading of Pd is 0.174%, the mass loading of Mn is 1.65%, and the mass loading of Ce is 3.21%.

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Abstract

The invention discloses an ethylene oxide combustion catalyst with double active sites and production and application of the ethylene oxide combustion catalyst with the double active sites. Accordingto the catalyst with the double active sites, cordierite is used as a carrier, noble metal and compound metal are used as active components respectively, the noble metal is one of Pt, Pd and Au, massloading of the noble metal is 0.1-0.7%, the compound metal is obtained by mixing any two of Co, Zn, Cu, Ce, Ni and Mn according to a mass ratio ranging from 1:1 to 1:10, and total mass loading of thecompound metal is 3-10%. According to the ethylene oxide combustion catalyst with the double active sites and production and application of the ethylene oxide combustion catalyst with the double active sites, the catalyst with the double active sites is produced by means of an impregnation method, a production method is simple and flexible, the catalyst shows excellent low-temperature activity incatalytic combustion of ethylene oxide, T50=142 DEGC, and T90=147 DEG C. The activity of the ethylene oxide combustion catalyst with the double active sites is reduced by 80 DEG C or more compared with that of an industrialized catalyst on the current market.

Description

[0001] (1) Technical field [0002] The invention relates to the technical field of catalysts, in particular to a preparation method for a catalyst used for low-temperature catalytic combustion to purify ethylene oxide. [0003] (2) Background technology [0004] Ethylene oxide (EO) is the simplest cyclic ether organic compound with the chemical formula C 2 h 4 O, is the second generation of high-efficiency low-temperature disinfection preparations after formaldehyde. EO not only has an efficient inhibitory effect on microorganisms, but also has a significant destructive effect on spores and germs; EO has a large vapor pressure and has strong penetrability to sterilized items. It can penetrate the micropores of the sterilized material to the deep part of the item to ensure its sterilization Effect, so based on the high-efficiency broad-spectrum bactericidal properties of EO. Since the 1990s in the United States, almost all medical devices and articles have been sterilized wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/656F23G7/07
CPCB01J23/6562F23G7/07F23G2209/14
Inventor 卢晗锋王宁李剑宇周瑛
Owner ZHEJIANG UNIV OF TECH
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