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

Absorbent for removing trace sulfur dioxide in fuel cell oxidant and synthesis method thereof

A sulfur dioxide and fuel cell technology, applied in chemical instruments and methods, separation methods, oxygen preparation, etc., can solve the problems of low specific surface area and inability to remove harmful gases, and achieve large specific surface area, light weight, and fast mass transfer rate Effect

Inactive Publication Date: 2011-10-12
DALIAN UNIV OF TECH
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the existing technology is that the air filter only has the effect of dust removal, and cannot remove harmful gases in the air, such as sulfur dioxide
However, carbon foam lacks sufficient micropores resulting in only a low specific surface area (approximately 0.12 m 2 support·g -1 support), so it is difficult to be used in the field of adsorption

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

[0026] Pour 6.25g of calcium carbonate powder with a size of 35-40nm into 50g of resole phenolic resin ethanol solution with a mass fraction of 25%, disperse under ultrasonic waves at room temperature for 5 minutes, and immerse the polyurethane foam cut into a certain shape in the dispersion liquid In, soak for 30 minutes. The impregnated foam was taken out and squeezed out the excess dispersion liquid, and then the foam was placed in an oven at 150° C. for curing for 12 hours. Put the composite foam cooled to room temperature after solidification into the horizontal quartz tube of the tube furnace, raise the temperature to 900°C at a rate of 5°C / min in a high-purity nitrogen atmosphere, and carbonize at 900°C for 1 hour. After the constant temperature time is over, let the sample cool down to room temperature naturally in the quartz tube. The obtained calcium oxide / foam carbon is processed into a matching filter material for the air filter and placed in the air filter. This...

Embodiment 2

[0028] Pour 3.5g of calcium carbonate powder with a size of 30-45nm into 20g of resole phenolic resin ethanol solution with a mass fraction of 25%, disperse under ultrasonic waves at room temperature for 30 minutes, and immerse the polyurethane foam cut into a certain shape in the dispersion liquid In, soak for 60 minutes. The impregnated foam was taken out and the excess dispersion was squeezed out, and then the foam was placed in an oven at 150° C. for curing for 24 hours. After curing, the composite foam cooled to room temperature was placed in a horizontal quartz tube of a tube furnace, heated to 900°C at a rate of 5°C / min in a high-purity nitrogen atmosphere, and carbonized at 900°C for 1 hour. After the constant temperature time is over, let the sample cool down to room temperature naturally in the quartz tube. The obtained foam carbon / calcium oxide is processed into a matching filter material for the air filter and placed in the air filter. This air filter can remove ...

Embodiment 3

[0030] Pour the calcium carbonate powder with a size of 200-5000nm into the ethanol solution of phenolic resin, disperse under ultrasonic waves at room temperature for 30 minutes, and immerse the polyurethane foam cut into a certain shape in the dispersion liquid for 60 minutes. The impregnated foam was taken out and the excess dispersion was squeezed out, and then the foam was placed in an oven at 150° C. for curing for 24 hours. After curing, the composite foam cooled to room temperature was placed in a horizontal quartz tube of a tube furnace, heated to 1000°C at a rate of 5°C / min in a high-purity argon atmosphere, and carbonized at 1000°C for 1 hour. After the constant temperature time is over, let the sample cool down to room temperature naturally in the quartz tube. The obtained foam carbon / calcium oxide is processed into a matching filter material for the air filter and placed in the air filter. This air filter can remove trace amounts of sulfur dioxide in the fuel cel...

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 belongs to the technical fields of carbon material science and fuel cells and relates to an absorbent for removing trace sulfur dioxide in a fuel cell oxidant, wherein the absorbent is prepared into a dispersion solution by utilizing calcium carbonate and phenolic resin; polymer foam is used for dipping the excessive dispersion solution, and then solidification and carbonization arecarried out, thus obtaining a calcium oxide / foam carbon composite. The synthesis method comprises the following steps: preparing a calcium carbonate phenolic resin dispersion solution; dipping a polymer foam template by utilizing the dispersion solution; solidifying the dipped foam to obtain the composite foam; and carbonizing the composite foam at a high temperature in the presence of inert gas so as to obtain the calcium oxide / foam carbon composite. The absorbent has the advantages that the synthetic composite can be used for removing the sulfur dioxide in air efficiently, removing the sulfur dioxide in a fuel cell air filter, and avoiding the cathode catalyst poisoning of the fuel cell, so that the performance degradation of the fuel cell is inhibited. The composite has the advantages of environmentally friendliness, low price, light weight, convenience for use and easiness for regeneration; the composite further can be composited with other filtering materials, so as to generate aplurality of composite filtering functions.

Description

technical field [0001] The invention belongs to the branch of science and technology of inorganic non-metallic materials—the field of science and technology of carbon materials and the field of fuel cells (hydrogen-oxygen fuel cells), and in particular relates to the synthesis of calcium oxide / foamed carbon composites by template method using liquid carbon source and calcium carbonate as raw materials materials, and techniques for removing trace amounts of sulfur dioxide from the oxidant (air) entering the fuel cell. Background technique [0002] The oxidant of the proton exchange membrane fuel cell is oxygen in the air. When entering the cathode of the battery, the air needs to pass through a filter to filter out the particulate matter in the air. The air is sent to the cathode of the fuel cell through a compressor or a blower. The weak point of existing technology is: air filter only has the effect of dust removal, can't remove harmful gas in the air, as sulfur dioxide. W...

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
IPC IPC(8): B01J20/20B01J20/30B01D53/02C01B13/02
Inventor 邱介山凌铮万鹏肖南杨隽宇
Owner DALIAN UNIV OF TECH