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Pore-enlarging process for activated carbonate as carrier of carried ruthenium catalyst

A ruthenium catalyst and activated carbon technology, which is applied in the field of carrier preparation, can solve problems such as methanation phenomenon and unstable properties of activated carbon carrier, and achieve the effect of improving stability and improving synthesis efficiency

Inactive Publication Date: 2003-11-19
FUZHOU UNIV ASSET MANAGEMENT CO LTD
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the supported ruthenium-based ammonia synthesis catalyst is unstable under the condition of high temperature, high pressure and hydrogen, and the phenomenon of methanation may occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Place 200 grams of commercial granular activated carbon in a high-temperature-resistant graphite crucible, and put the graphite crucible into a medium-frequency induction graphitization furnace for high-temperature heat treatment. Before processing, vacuumize the system to make the vacuum degree of the system reach 10 -2 Pa, then start to heat up, and continue to evacuate, when the system temperature reaches 1500°C, stop vacuuming, pass in an oxygen-free inert gas, the gas pressure reaches 100Pa, continue to heat up to the end temperature (between 1600-2500°C) , and after the end point temperature was constant for 2 hours, the temperature was naturally lowered, and when the temperature dropped to room temperature, the product was taken out to obtain graphitized activated carbon.

[0011] The hole expansion treatment is performed by the following two methods.

[0012] Method 1: Put the hot graphitized activated carbon in a tube furnace, and pass in a mixed gas, the gas ...

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Abstract

A pore-enlarging process for the carrier of the carried Ru catalyst used for synthesizing ammonia includes high-temp treating of the activated carbon from marcket under the protection of inertial gas for graphitizing it, and enlarging the pores of graphitized activated carbon. The resultant activated carbon used as said carrier features high stability and high specific surface area.

Description

Technical field [0001] The invention relates to a carrier preparation technology for preparing a novel ammonia synthesis catalyst in the ammonia synthesis industry, in particular to a pore-enlarging treatment of an activated carbon carrier in an activated carbon-loaded ruthenium-based ammonia synthesis catalyst. technical background [0002] At present, traditional iron catalysts are mostly used in the catalytic reaction of ammonia synthesis in the domestic ammonia synthesis industry. Iron catalysts have the advantages of low price and good stability. However, the iron catalyst has a high activation temperature, and the catalytic reaction of ammonia synthesis must be carried out under high temperature and high pressure conditions. The production process requires strict equipment and consumes a lot of energy. [0003] In recent years, a new type of ammonia synthesis catalyst has been developed abroad, that is, the supported ruthenium-based ammonia synthesis catalyst, which ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00
Inventor 郑晓玲魏可镁
Owner FUZHOU UNIV ASSET MANAGEMENT CO LTD