Unlock instant, AI-driven research and patent intelligence for your innovation.

Reduction method of ruthenium-based ammonia synthesis catalyst with activated carbon as carrier

A catalyst and activated carbon technology, which is applied in the field of ammonia synthesis catalyst treatment process, can solve the problems of large access and other problems, and achieve the effects of simple operation, improved catalyst activity, and good low-temperature activity

Active Publication Date: 2017-03-29
FUZHOU UNIV
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the active component of the catalyst is still Fe 3 o 4 , which is quite different from the ammonia synthesis catalyst with water-soluble chlorine-free ruthenium complex as precursor

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] At room temperature, the ruthenium-based ammonia synthesis catalyst with a ruthenium content of 10% is placed in the reactor with the expanded graphitized activated carbon as the carrier and the precursor as a chlorine-free ruthenium complex, and the reaction system is kept at a reduction space velocity of 10000 h -1 , The reduction pressure is 4MPa and the mixed gas of hydrogen and nitrogen with a hydrogen content of 75% is introduced as the reducing gas. °C process, if the temperature rise of the catalyst bed exceeds 25 °C / h, the hydrogen content in the reducing gas is controlled at 2%, when the system temperature rises to 200 °C, the temperature is kept constant for 5 hours, and then the temperature is increased to 30 °C / h Raise speed Raise the system temperature to 300°C and keep it constant for 5 hours, then raise the system temperature to 400°C at a temperature rise rate of 30°C / h and hold it at a constant temperature for 5 hours, then raise the system temperature ...

Embodiment 2

[0035] At room temperature, the ruthenium-based ammonia synthesis catalyst with a ruthenium content of 10% is placed in the reactor with the expanded graphitized activated carbon as the carrier and the precursor as a chlorine-free ruthenium complex, so that the reaction system is reduced at a space velocity of 10000h -1, The reduction pressure is 4MPa and the mixed gas of hydrogen and nitrogen with a hydrogen content of 50% is introduced as the reducing gas. °C process, if the temperature rise of the catalyst bed exceeds 25 °C / h, control the hydrogen content in the reducing gas to 2%, keep the temperature constant for 5 hours when the system temperature rises to 200 °C, and then increase the temperature at 30 °C / h Raise speed Raise the system temperature to 300°C and keep it constant for 5 hours, then raise the system temperature to 400°C at a temperature rise rate of 30°C / h and hold it at a constant temperature for 5 hours, then raise the system temperature at a temperature ri...

Embodiment 3

[0039] At room temperature, the ruthenium-based ammonia synthesis catalyst with a ruthenium content of 10% is placed in the reactor with the expanded graphitized activated carbon as the carrier and the precursor as a chlorine-free ruthenium complex, and the reaction system is kept at a reduction space velocity of 10000 h -1 , The reduction pressure is 4MPa and the mixed gas of hydrogen and nitrogen with a hydrogen content of 5% is introduced as the reducing gas. °C process, if the temperature rise of the catalyst bed exceeds 25 °C / h, control the hydrogen content in the reducing gas to 2%, keep the temperature constant for 5 hours when the system temperature rises to 200 °C, and then increase the temperature at 30 °C / h Raise speed Raise the system temperature to 300°C and keep it constant for 5 hours, then raise the system temperature to 400°C at a temperature rise rate of 30°C / h and hold it at a constant temperature for 5 hours, then raise the system temperature at a temperatur...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a reduction method of a ruthenium-based ammonia synthesis catalyst with activated carbon as a carrier. The ruthenium-based ammonia synthesis catalyst is prepared by taking metallic ruthenium as an active component and pore-expanded graphitized activated carbon as a carrier. According to the reduction method, by controlling the reduction temperature and heating rate, the catalyst is reduced in presence of reducing gas containing hydrogen, so that the catalyst has catalytic activity. The reduction method disclosed by the invention has the characteristics of simple operation, easiness in implementation, full reduction of the catalyst, greatly improved activity of the catalyst, obvious energy saving effect and the like.

Description

technical field [0001] The invention belongs to the field of ammonia synthesis catalyst treatment technology, and in particular relates to a reduction method of a ruthenium series ammonia synthesis catalyst with activated carbon as a carrier. Background technique [0002] Researchers have been exploring ammonia synthesis catalysts for more than 100 years. Traditional industrial ammonia synthesis catalysts are based on Fe 3 o 4 As the mother body, the development has been very mature. In iron-based catalysts (Fe 3 o 4 ) under the action of nitrogen and hydrogen to synthesize ammonia is still carried out under high temperature and high pressure conditions, the temperature is required to be 400-500 ℃, and the pressure is 150-300 bar. Ammonia synthesis is a high energy-consuming industry, and the ammonia synthesis industry is the pillar industry of my country's chemical industry, so energy conservation and emission reduction are imperative. The continuous development of cat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/96B01J37/18
CPCB01J23/96B01J37/18
Inventor 倪军荆宝强林建新江莉龙林炳裕
Owner FUZHOU UNIV