High-temperature-resistant catalyst carrier and preparation method thereof

A catalyst carrier, high temperature resistant technology, applied in catalyst carriers, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high cost of carriers and catalysts, accelerated loss of surface area, and inability to meet active components. , to achieve good application prospects, high surface area stability, and not easy to sinter.

Inactive Publication Date: 2013-03-06
大连瑞克科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, under the conditions of high temperature, high pressure and high water vapor, the rate of surface area loss of the carrier is significantly accelerated, and its stability cannot meet the needs of industrial reactions under high temperature and high water vapor conditions.
Chinese patent CN93106324.8 has prepared a high-temperature-resistant magnesium-based catalyst carrier, which can be used for reactions under high temperature and high water vapor, but the specific surface area of ​​the catalyst carrier is less than 10m 2 / g, cannot meet the requirements of loading a large amount of active components on the carrier, and the activity of the catalyst prepared with this carrier is low
Hafnium-containing oxides are used as catalyst supports to prepare high-temperature-resistant catalyst supports and high-temperature-resistant catalysts. However, due to the high price of hafnium compounds, the cost of supports and catalysts is high, and the application is limited.

Method used

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  • High-temperature-resistant catalyst carrier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 153 grams of Al(OH) 3 , 129 g Zr(OH) 4 , 145 grams of Ti(OH) 4 Mix evenly, dry at 120°C, and then bake at 400°C for 5 hours to obtain primary carrier powder.

[0018] Take 835 grams of Al(NO 3 ) 3 , 551 g Zr(NO 3 ) 4 , 740 g Ti(NO 3 ) 4 Add it into 5L of water, add the primary carrier powder obtained above for beating under stirring to obtain slurry A, titrate A with 2mol / L sodium carbonate solution to pH=8.0, then filter and wash, dry at 120°C, and Calcined at 600°C for 5 hours to obtain secondary carrier powder;

[0019] Take 99.7 g La(NO 3 ) 3 , 99.4 g Ce(NO 3 ) 3 Dissolve in 5L of water, add the secondary carrier powder obtained above for beating under stirring to obtain slurry B, titrate B with 2mol / L sodium carbonate solution to pH = 9.0, then filter and wash, dry at 120°C, and Calcined at 1000°C for 5 hours to obtain high-temperature-resistant catalyst carrier powder, and molded to obtain high-temperature-resistant catalyst carrier, sample 1.

...

Embodiment 2

[0022] Take 153 grams of Al(OH) 3 , 129 g Zr(OH) 4 , 145 g Mg(OH) 2 100 grams of SiO2 were mixed evenly, dried at 120°C, and then calcined at 400°C for 5 hours to obtain a primary carrier powder;

[0023] Take 417 grams of Al(NO 3 ) 3 , 275 grams of Zr(NO 3 ) 4 , 555 g Mg(NO 3 ) 2 and 250 grams of 40% silica sol were added to 5L of water, and the primary carrier powder obtained above was added for beating under stirring to obtain slurry A, and A was titrated with 2 mol / L sodium hydroxide solution to pH = 10.0, and then filtered and washed , drying at 120°C, and roasting at 600°C for 6 hours to obtain a secondary carrier powder;

[0024] Take 99.7 g La(NO 3 ) 3 , 99.4 g Ce(NO 3 ) 3 and 96.5 g Sm(NO 3 ) 3 Dissolve in 5L of water, add the above-mentioned secondary carrier powder under stirring and beat to obtain slurry B, titrate B with 2mol / L sodium hydroxide solution to pH = 9.0, then filter, wash, and dry at 120°C. Calcined at 1100° C. for 5 hours to obtain a hi...

Embodiment 3

[0027] Take 290 grams of Mg(OH) 2 , 258 g Zr(OH) 4 , 290 grams of Ti(OH) 4 Mix evenly, dry at 120°C, and then bake at 450°C for 5 hours to obtain primary carrier powder;

[0028] Take 370 grams of Mg (NO 3 ) 2 , 278 grams of Zr(NO 3 ) 4 , 370 g Ti(NO 3 ) 4 Add it into 5L of water, and add the above-mentioned primary carrier powder under stirring to make a slurry to obtain slurry A. Use 2mol / L sodium carbonate solution to titrate A to pH = 10.0, then filter, wash, and dry at 120°C. Calcined at 700°C for 5 hours to obtain secondary carrier powder;

[0029] Take 40 grams of La(NO 3 ) 3 , 40 g Ce(NO 3 ) 3 , 38 g Sm(NO 3 ) 3 and 78 grams of Nd(NO 3 ) 3 Dissolve in 5L of water, add the above-mentioned secondary carrier powder for beating under stirring to obtain slurry B, titrate B with 4mol / L ammonia solution to pH=9.0, then filter and wash, dry at 120°C, and dry at 1200°C ℃ calcination for 5 hours to obtain high-temperature-resistant catalyst carrier powder, and s...

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Abstract

The invention discloses a high-temperature-resistant catalyst carrier and a preparation method thereof, belonging to the technical fields of high-temperature-resistant catalyst carrier materials and preparation thereof. The material of the high-temperature-resistant catalyst carrier is prepared by modifying three or more in a group consisting of Al2O3, ZrO2, TiO2, MgO and SiO2 via rare-earth compounds, wherein modifiers are the rare-earth oxides of rare-earth elements such as La, Ce, Nd and Sm, and have a content of 3-20%. The material of the carrier is extremely high in surface area stability, good in high-temperature resistance and high in specific surface area at a temperature above 600 DEG C and with the existence of high vapour; catalytic active constituents are loaded on the carriers, and during a high-temperature reaction, metal particles or metal oxide particles in the active constituents are not easy to sinter and stable in performance; and the catalyst has a long life. The carrier is simple in process and low in cost in preparation for a high-temperature reaction catalyst; and the prepared high-temperature carrier has a specific surface area of greater than 40 m<2> / g and a pore volume of greater than 0.2 ml / g, thus having a good application prospect.

Description

technical field [0001] The invention relates to a high-temperature-resistant catalyst carrier and a preparation method thereof, and belongs to the technical field of high-temperature-resistant catalyst carrier materials and their preparation. Background technique [0002] Many important industrial catalytic processes are carried out at high temperature, for example, steam reforming of methane to synthesis gas (a mixture of carbon monoxide and hydrogen), partial oxidation of hydrocarbons to synthesis gas, deoxygenation of oxygen-containing organic substances such as coal bed methane or catalytic combustion of organic substances, synthesis gas Reactions such as methanation to synthesize natural gas need to be carried out at high temperatures. In most cases, the catalysts used are solid catalysts, and the active catalytic components are supported on metal oxides. The catalyst supported by the usual carrier, due to the poor high temperature resistance of the carrier, at high tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J23/10B01J35/10
Inventor 周焕文邓少亮乔川曲雪琴
Owner 大连瑞克科技股份有限公司
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