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Monolithic catalyst and its preparation and application

A catalyst, monolithic technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of catalyst activity decline, Ni crystals volatile, and conversion rate reduction, etc., to achieve high selectivity The effect of resistance, not easy to peel off, not easy to run off

Inactive Publication Date: 2006-06-28
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conversion rate of methane and the selectivity of carbon monoxide decreased by 2%, and the main reason for the decrease in catalyst activity was the loss of Ni crystal grains due to instability and volatilization during the reaction process.

Method used

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  • Monolithic catalyst and its preparation and application
  • Monolithic catalyst and its preparation and application
  • Monolithic catalyst and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1 (preparation of Ni loading capacity is about 10wt% monolith catalyst)

[0020] Preparation of aluminum sol and colloidal modified aluminum sol:

[0021] a. Add 283ml of secondary deionized water to 20.4g of PURAL SB powder (provided by Condea, Germany, an industrial powder with a gibbsite crystal form produced by hydrolysis of aluminum n-hexoxide), stir, and keep the temperature at 85°C for 0.5 After 1 hour, 16.9ml of 1.6M nitric acid was added for degumming, and reflux condensation was performed for 6 hours to obtain an aluminum sol with a concentration of 1M.

[0022] b. Take Ni(NO 3 ) 2 34.7g, LiNO 3 5.5g, La(NO 3 ) 3 Add 1000ml secondary deionized water to 10.4g, stir to make Ni 2+ , Li + , La 3+ Mixed salt solutions with concentrations of 0.19M, 0.08M and 0.03M respectively.

[0023] c. Take 50ml of aluminum sol, mix it with 50ml of the mixed salt solution prepared in b, and stir evenly to obtain the aluminum sol solution modified by colloidal...

Embodiment 2

[0033] The difference from Example 1 is:

[0034] The calcination temperature of the monolith catalyst is 950°C, and the calcination is for 4 hours, and the obtained monolith catalyst is at 850°C, CH 4 / O 2 =2.0, the space velocity of the reaction is 1.34×10 5 The methane partial oxidation reaction was carried out under the condition of 1 / kg.h, and the initial activity was low. After 10 hours of reaction, the activity was equivalent to that of the catalyst described in Example 1, and remained stable.

Embodiment 3

[0036] The difference from Example 1 is:

[0037] The amounts of PVA and PEG added are respectively 4% and 2% by weight of the prepared aluminum sol. The cut and washed monolith is immersed in it for 5 minutes, dried at 10°C for 24 hours, and baked at 850°C for 4 hours. Repeat steps 1)~ 4) 2 times. Gained monolith catalyst result is the same as embodiment 1.

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Abstract

The invention relates to catalyst technology field, especially provides a monolith catalyst and the manufacturing method. It uses Ni as active component, the Al2O3 is used as carrier, and the invention uses sol-gel particle in situ decoration technology, and introduces the Ni2+ and Li+, and La3+ ion to produce the product. The active component particle size is small, and it is dispersed evenly.

Description

technical field [0001] The invention relates to a catalyst, a catalyst preparation method and application technology, and particularly provides a monolith catalyst, a preparation method and application. Background technique [0002] In recent years, the partial oxidation of methane (POM) to synthesis gas technology has attracted widespread attention. At present, there are various types of catalysts for POM. Monolith (monolith) has good thermal stability and mechanical strength, and can be used as a catalyst support for high space velocity and high temperature reactions. Since the specific surface of monolith is very small, usually a layer of carrier with large specific surface (such as γ-Al 2 o 3 ) and then introduce the active component by impregnation method or organic metal deposition method, or directly apply the slurry of the carrier after the active component is impregnated to the surface of the monolith. Use monolith as the catalyst of carrier or supporting body t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J37/02C01B3/40
CPCY02P20/52
Inventor 冉然熊国兴杨维慎
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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