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Regeneration method of sulphur absorption V2O5/AC catalytic adsorption agent

An adsorbent, 0.1wt%-5wt% technology, applied in the field of carbon-based catalytic adsorbent regeneration, can solve the problems of serious carbon consumption, reduced catalytic adsorbent desulfurization activity and stability, etc., and achieves good desulfurization stability.

Active Publication Date: 2008-09-10
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The carbon consumption in the thermal regeneration process is serious, resulting in a great reduction in the desulfurization activity and stability of the regenerated catalytic adsorbent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Take a certain amount of pre-made NH with a vanadium concentration of 0.0778g / ml 4 VO 3 An equal volume of oxalic acid solution was evenly impregnated on 30-60 mesh activated carbon, placed at room temperature for 2 hours, then dried at 50°C for 8 hours, and then dried at 110°C for 6 hours. Finally, calcine at 300-500°C for 5 hours in an inert atmosphere, and pre-oxidize in air at 250°C for 5 hours to prepare V 2 o 5 loading of 1wt% V 2 o 5 / AC catalytic adsorbent. The catalytic adsorbent at 0.15% SO 2 , 4.0%O 2 , 6%H 2 In O, the space velocity is 7000ml / g h, and the desulfurization temperature is 200°C to remove SO 2 , when the desulfurization rate drops to 80%, its adsorption sulfur capacity is 3.26gSO 2 / 100g-cat.. The regeneration atmosphere is 0.15% CO / N 2 , the space velocity is 10000ml / g·h, the regeneration temperature is 300°C, and the regeneration time is 90 minutes. After two desulfurization-regeneration cycles, when the catalytic adsorbent is used...

Embodiment 2

[0016] Take a certain amount of pre-made NH with a vanadium concentration of 0.0778g / ml 4 VO 3 An equal volume of oxalic acid solution was evenly impregnated on 30-60 mesh activated carbon, placed at room temperature for 2 hours, then dried at 50°C for 8 hours, and then dried at 110°C for 6 hours. Finally, calcine at 300-500°C for 5 hours in an inert atmosphere, and pre-oxidize in air at 250°C for 5 hours to prepare V 2 o 5 loading of 1wt% V 2 o 5 / AC catalytic adsorbent. The catalytic adsorbent at 0.15% SO 2 , 4.0%O 2 , 6%H 2 In O, the space velocity is 8000ml / g h, and the desulfurization temperature is 200°C to remove SO 2 , when the desulfurization rate drops to 80%, its adsorption sulfur capacity is 3.26gSO 2 / 100g-cat.. The regeneration atmosphere is 0.05% CO / N 2 , the space velocity is 6000ml / g·h, the regeneration temperature is 350°C, and the regeneration time is 60 minutes. After two desulfurization-regeneration cycles, when the catalytic adsorbent is used ...

Embodiment 3

[0018] Take a certain amount of pre-made NH with a vanadium concentration of 0.0778g / ml 4 VO 3 An equal volume of oxalic acid solution was evenly impregnated on 30-60 mesh activated carbon, placed at room temperature for 2 hours, then dried at 50°C for 8 hours, and then dried at 110°C for 6 hours. Finally, calcine at 300-500°C for 5 hours in an inert atmosphere, and pre-oxidize in air at 250°C for 5 hours to prepare V 2 o 5 loading of 1wt% V 2 o 5 / AC catalytic adsorbent. The catalytic adsorbent at 0.15% SO 2 , 4.0%O 2 , 6%H 2 In O, the space velocity is 8000ml / g h, and the desulfurization temperature is 200°C to remove SO 2 , when the desulfurization rate drops to 80%, its adsorption sulfur capacity is 3.26gSO 2 / 100g-cat.. The regeneration atmosphere is 0.15% CO / N 2 , the space velocity is 8000ml / g·h, the regeneration temperature is 350°C, and the regeneration time is 90 minutes. After two desulfurization-regeneration cycles, when the catalytic adsorbent is used ...

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Abstract

A regeneration method of a sulfur absorption V2O5 / AC catalyst-sorbent is to arrange the catalyst-sorbent of a V2O5 / carbon-based carrier of 0.1wt percent to 5wt percent to a regeneration reactor after sulfur absorption, raise the temperature to 230 to 420 DEG C in the atmosphere with 0.05 to 1.0 percent of CO and regenerate for 10 to 120 minutes. The regeneration method has the advantages that the decoking activity and stability of regenerated catalyst-sorbent can be well recovered, the regeneration technique is simple and the maneuverability is high.

Description

technical field [0001] The invention belongs to a method for regeneration of a carbon-based catalytic adsorbent, specifically V after desulfurization or simultaneous desulfurization and denitrification 2 o 5 / AC catalytic adsorbent regeneration method in CO-containing atmosphere. Background technique [0002] my country's energy consumption structure is dominated by coal, and a large amount of coal combustion has caused my country's air to be polluted by soot. SO emissions from coal combustion 2 with NO x It is the chief culprit of acid rain and photochemical smog, which is extremely harmful to the environment and human beings. Strictly control SO 2 and NO x emissions is a key task in China's energy and environmental protection fields. [0003] Compared with the most commonly used wet limestone-gypsum process at present, the dry simultaneous desulfurization and denitrification catalytic-adsorption technology has the advantages of high desulfurization and denitrificati...

Claims

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Application Information

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IPC IPC(8): B01J23/92B01J23/22B01J20/34B01D53/96B01D53/60
Inventor 黄张根张睿牛宏贤
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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