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A kind of methanation catalyst and its preparation method and application

A methanation catalyst and catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of huge patent royalties, etc., and achieve the avoidance of overheating sintering, strong raw material processing capacity, Promotes even dispersion

Active Publication Date: 2021-01-26
壹碳环投(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, coal-to-natural gas projects started in China are mainly using foreign methanation technology, for which huge patent royalties need to be paid

Method used

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  • A kind of methanation catalyst and its preparation method and application
  • A kind of methanation catalyst and its preparation method and application
  • A kind of methanation catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of catalyst carrier

[0038] Weigh 200g of aluminum isopropoxide and pour it into 120g of isopropanol and stir to dissolve; weigh 127.2g of PVP, 0.84g of potassium nitrate and 1.38g of lanthanum nitrate and pour it into 3600g of deionized water and stir to dissolve. The temperature of the deionized aqueous solution is maintained at 85°C; The isopropanol solution was slowly added dropwise to the deionized water solution under vigorous stirring and continued to stir for 2 hours. Then add 3.9mol nitric acid and stir to dissolve until the hydrolysis is complete. Finally, the excess solvent was evaporated, so that the solid content in the solvent was 30%, and then spray molding was performed. The shaped powder was collected and dried at 120°C for 3 hours, and the dried sample was put into a muffle furnace and calcined at 1000°C for 3 hours to obtain a microsphere powder carrier. The specific surface area measured by isothermal nitrogen adsorption method is ...

Embodiment 2

[0046] (1) Preparation of catalyst carrier

[0047] Weigh 200g of aluminum isopropoxide and pour it into 180g of isopropanol and stir to dissolve; weigh 101.7g of PVP, 1.12g of potassium nitrate and 0.69g of lanthanum nitrate and pour it into 4000g of deionized water and stir to dissolve. The temperature of the deionized aqueous solution is maintained at 75°C; The isopropanol solution was slowly added dropwise to the deionized water solution under vigorous stirring and continued to stir for 3 hours. Then add 4.88mol nitric acid and stir to dissolve until the hydrolysis is complete. Finally, the excess solvent was evaporated, so that the solid content in the solvent was 35%, and then spray molding was performed. The shaped powder was collected and dried at 120° C. for 3 hours, and the dried sample was put into a muffle furnace and calcined at 1100° C. for 3 hours to obtain a microsphere powder carrier. The specific surface area measured by isothermal nitrogen adsorption metho...

Embodiment 3

[0053] (1) Preparation of catalyst carrier

[0054] Weigh 200g of aluminum isopropoxide, pour it into 96g of isopropanol and stir to dissolve; weigh 190.8g of PVP, 0.62g of potassium nitrate and 1.73g of lanthanum nitrate, pour it into 2800g of deionized water and stir to dissolve, and the temperature of the deionized aqueous solution is maintained at 95°C; The isopropanol solution was slowly added dropwise to the deionized water solution under vigorous stirring and continued to stir for 2 hours. Then add 2.93mol nitric acid and stir to dissolve until the hydrolysis is complete. Finally, the excess solvent was evaporated, so that the solid content in the solvent was 25%, and then spray molding was performed. The shaped powder was collected and dried at 120° C. for 2 hours, and the dried sample was put into a muffle furnace and calcined at 960° C. for 3 hours to obtain a microsphere powder carrier. The specific surface area measured by isothermal nitrogen adsorption method is...

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Abstract

The invention discloses a methanation catalyst, its preparation method and application. The present invention uses aluminum isopropoxide as a raw material, and adopts a solvent-gel method to prepare aluminum sol, and simultaneously dissolves the soluble salt of an alkali metal auxiliary agent and the soluble salt of an alkaline earth metal or rare earth metal modification auxiliary agent in the aluminum sol, and then After being concentrated and then spray-molded, the microsphere carrier precursor is obtained, and after drying and calcining, the microsphere powder in a certain particle size range is screened as the catalyst carrier. The microsphere powder was used as the carrier, and the active metal Ni and the additive La were loaded by the equal volume impregnation method. 2 o 3 , thus preparing a complete methanation catalyst suitable for microchannel reactors. The catalyst prepared by the method of the invention has higher activity, hydrothermal stability and carbon deposition resistance.

Description

technical field [0001] The invention belongs to the technical field of coal-to-natural gas, and in particular relates to a catalyst suitable for complete methanation in a microchannel reactor, a preparation method and an application. Background technique [0002] my country's energy resources are characterized by rich coal, poor oil (petroleum), and little gas (natural gas). Coal consumption accounts for about 70% of primary energy consumption. Natural gas is a high-quality energy that is clean, convenient to transport and safe to use. With the acceleration of my country's industrialization and urbanization and the implementation of energy conservation and emission reduction policies, the proportion of clean energy consumption such as natural gas will increase. Synthetic gas obtained through coal or biomass gasification, and then synthesized natural gas through methanation has become an effective way to make up for the shortage of gas sources. Due to the high energy conve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J35/10C10L3/08B01J37/02B01J35/02B01J35/00
CPCC10L3/08B01J23/002B01J23/83B01J37/0018B01J2523/00B01J35/40B01J35/613B01J35/615B01J35/647B01J2523/13B01J2523/31B01J2523/3706B01J2523/847
Inventor 郝玉良李建广
Owner 壹碳环投(北京)科技有限公司
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