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Multilevel hole material load cobalt catalyst, preparation method and application thereof

A technology of cobalt catalyst and multi-level pores, applied in the field of catalyst and preparation, can solve problems such as poor penetration, and achieve the effects of avoiding diffusion limitation, high thermal stability and hydrothermal stability, and good stability

Active Publication Date: 2008-09-24
中科潞安能源技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the pores obtained by this method are not formed by self-assembly, and the connectivity betwe

Method used

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  • Multilevel hole material load cobalt catalyst, preparation method and application thereof

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Embodiment 1

[0025] Preparation of hierarchical porous silica: commercially available popcorn with better expansion was placed in a high-temperature tube furnace, and carbonized at 900°C for 4 hours in a nitrogen atmosphere. Porous carbon with honeycomb macroporous structure and uniform microporous structure is obtained.

[0026] Prepare the solution silicon source according to the following ratio: ethanol: NH 3 :H 2 O=1:30:0.15:2, the solution was stirred at room temperature for 6 h, and then impregnated into the pores of porous carbon in three steps (porous carbon / porous carbon+solution=30 (WT%)). Immerse each step for 24 hours and dry at 100°C for 24 hours. Finally, it was calcined at 600° C. under an air atmosphere for 6 hours to remove the carbon template to obtain a hierarchically porous silica carrier.

[0027] The preparation of catalyst: take by weighing 9.3g Co(NO 3 ) 2 ·6H 2 O and 0.35g Ru(NO 3 ) 4 Dissolve in 30ml of water, impregnate the above 10g carrier, let it stand...

Embodiment 2

[0031] Preparation of hierarchical porous silica: using porous carbon material as a template, the preparation process is as follows: commercially available popcorn with good expansion is placed in a high-temperature tube furnace, and carbonized at 1000°C for 6 hours in a nitrogen atmosphere. Porous carbon with honeycomb macroporous structure and uniform microporous structure is obtained. Prepare the solution silicon source according to the following ratio: ethanol: NH 3 :H 2 O=1:25:0.12:2, the solution was stirred at room temperature for 8h, and then impregnated into the pores of porous carbon in four steps (porous carbon / porous carbon+solution=40(wt%)). Immerse each step for 12 hours and dry at 110°C for 36 hours. Finally, it was calcined at 600°C for 6 hours in an air atmosphere to remove the carbon template to obtain a hierarchically porous silica carrier.

[0032] The preparation of catalyst: take by weighing 9.3g Co(NO 3 ) 2 ·6H 2 O and 0.7g Ru(NO 3 ) 4 Dissolve in ...

Embodiment 3

[0036] Preparation of Hierarchical Porous Silica: Using porous starch gel as a template, the preparation process is as follows: Weigh 10g of potato starch into 100g of water, heat to 90°C and stir for 10min. After standing for 12h, put it in a refrigerator at -20°C After standing for 12 hours, it was dried at room temperature to obtain a porous starch gel with a regular structure. Prepare the solution silicon source according to the following ratio: ethanol: NH 3 :H 2 O=1:30:0.35:2, the solution was stirred at room temperature for 8h, and then impregnated into the pores of the starch template in four steps (starch gel / starch gel+solution=20(wt%)). Immerse each step for 24 hours and dry at 130°C for 24 hours. Finally, the carbon template was removed by calcining at 650° C. under an air atmosphere for 7 hours to obtain a hierarchically porous silica carrier.

[0037] The preparation of catalyst: take by weighing 24.6g Co(NO 3 ) 2 ·6H 2 O was dissolved in 36ml of water, imp...

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Abstract

The invention relates to a multi-stage hole material cobalt-loaded catalyst, which is made according to the following parts by weight of 5 to 40 percent of cobalt; 0 to 2.0 percent of precious metals, 0 to 2 percent of non-precious metals, 56 percent to 95 percent of silica. The catalyst is made by an isovolumetric immersion method. The catalyst has the advantages of large surface area, enough central holes and large holes, high thermal stability and hydrothermal stability, selective synthesis of long-chain hydrocarbons with different carbon numbers.

Description

technical field [0001] The invention relates to a catalyst, its preparation method and application, in particular to a hierarchical porous material-loaded cobalt catalyst, its preparation method and its application in Fischer-Tropsch synthesis. Background technique [0002] Fischer-Tropsch synthesis refers to the process of synthesizing hydrocarbons from syngas in the presence of catalysts. Cobalt-based catalysts have high activity. C 5+ The advantage of high selectivity is that it is a commonly used catalyst in Fischer-Tropsch synthesis. Although Fischer-Tropsch synthesis has been studied for more than ten years, with the shortage of petroleum resources in recent years and the improvement of citizens' awareness of environmental protection, Fischer-Tropsch synthesis as a gas-to-oil technology has received attention again. How to improve catalyst activity and maintain high C 5+ Selectivity is the goal that researchers are always pursuing. [0003] Biomass in nature, such...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J23/75B01J23/889B01J35/04C07C1/04C10G2/00
Inventor 孙予罕王月伦贾丽涛李德宝侯博
Owner 中科潞安能源技术有限公司
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