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Ethane catalytic combustion monolithic catalyst and preparation method thereof

A monolithic catalyst and catalytic combustion technology, applied in the direction of combustion methods, physical/chemical process catalysts, catalyst carriers, etc., can solve the problem of weak bonding between the coating and the carrier, affecting the reactivity and service life of the catalyst, and low loading of the coating, etc. problems, to achieve the effects of improving catalytic activity and structural stability, reducing Pd loading, and improving uniformity and stability

Active Publication Date: 2020-06-12
大连圣迈化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned catalysts have the problems of weak binding force between the coating and the carrier, and low loading of the coating, thus affecting the reactivity and service life of the catalyst.

Method used

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  • Ethane catalytic combustion monolithic catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh 0.5g of sodium alginate and add it to 100g of alkaline silica sol (PH value of 8.5~10) and stir thoroughly for 40 minutes, then immerse in a cordierite honeycomb ceramic carrier with a φ1.01×2.1cm and a pore density of 400cpsi for 10 minutes, and take out Finally, remove the residual slurry in the carrier channel, microwave dry for 10 minutes, and bake at 550 ° C for 4 hours to obtain coated SiO 2 Tie-coated honeycomb ceramic substrates. Among them, the transition coating load is 7.5%, and the shedding rate is 0.1%.

[0036] Weigh 35g of γ-AL2O3 powder, 5g of pseudoboehmite powder, 5g of aluminum sol and 0.5g of sodium alginate into 55g of deionized water, stir thoroughly for 30 minutes, add 1ml of nitric acid solution with a mass fraction of 18%, and measure the slurry with a pH meter. The material pH is 5.78, then the slurry is placed in a ball mill for ball milling for 4 hours, after taking it out, it is allowed to stand for 24 hours, and then 1ml of ammonia w...

Embodiment 2

[0039] Change the gamma-AL in embodiment 1 O powder into 41g, pseudo-boehmite powder into 6g, aluminum sol into 7g, sodium alginate into 0.7g, mass fraction 18% nitric acid solution into 1.5ml, mass The ammoniacal liquor of fraction 15% is changed into 1.5ml, and the viscosity of this active coating slurry is 0.4 Pascal second, and all the other preparation methods are with embodiment 1, and wherein active coating loading is 45.6%, and the shedding rate is 0.7%, and the BET area is 32.53m 2 / g.

Embodiment 3

[0041] Change active coating roasting temperature into roasting 800 ℃ among the embodiment 1, all the other preparation methods are with embodiment 1, and wherein active coating load is 42%, and the shedding rate is 0.8%, and BET area is 30m 2 / g.

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Abstract

The invention belongs to the technical field of chemical catalysts, and particularly relates to an ethane catalytic combustion monolithic catalyst and a preparation method thereof. The preparation method specifically comprises the steps of carrier transition coating preparation, active coating slurry preparation, carrier active coating preparation and active component loading. The catalyst can beused for catalytic combustion of ethane, benzene and other low-carbon alkanes and aromatic hydrocarbons, has high activity and stability, and has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of chemical catalysts, and in particular relates to an ethane catalytic combustion integral catalyst and a preparation method thereof. Background technique [0002] Volatile organic compounds, referred to as VOCs, refer to organic compounds with a saturated vapor pressure greater than 70KPa at normal temperature and a boiling point below 260°C at normal pressure. There are many types of VOCs, including aliphatic hydrocarbons, aromatic hydrocarbons, halogenated hydrocarbons, alcohols, aldehydes, ketones, ethers, esters, etc. As a kind of VOCs, low-carbon paraffins are commonly found in the waste gas emitted by industrial production such as petrochemical, pharmaceutical, printing, and spray paint. Human health poses serious hazards, so the control and governance of VOCs is urgent. Common VOCs pollution control technologies include adsorption method, absorption method, condensation method, membrane separation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J32/00B01J35/10F23G7/07
CPCB01J23/10F23G7/07B01J35/613Y02A50/20
Inventor 徐卫侯蕾杜霞茹李楠于志日马楠肖菲吴熠刘金刚
Owner 大连圣迈化学有限公司