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Production method of active carbon of direct carbon conversion fuel cell

A fuel cell and activated carbon technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of high ash content, poor electrical conductivity, low reactivity, etc., and achieve low ash content, good electrical conductivity, and favorable electrical conductivity. Effect

Inactive Publication Date: 2012-01-04
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Graphite has good electrical conductivity, with zero ash content, but low reactivity; activated carbon is a porous carbon material with developed pore structure and large specific surface area prepared from biological organic matter, and has high specific surface area and porosity. Developed, internal structure, high reactivity, but high ash content, and poor electrical conductivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) KOH and K 2 CO 3 Prepare the composite activator according to 1:1, then weigh the composite activator and oak carbonized material at a mass ratio of 4:1, add distilled water and mix well, soak for 12h at room temperature, and then at a temperature of 120°C under 150ml / min of nitrogen dry. The dried mixture is placed in a reactor under a stream of nitrogen for activation, the activation temperature is 800°C, the activation time is 60 min, and the activation is completed and cooled to room temperature. Finally, the activated carbon was repeatedly washed and filtered with distilled water until the filtrate was neutral, dried under the protection of nitrogen at 120°C, and collected for use.

[0018] (2) Load Ni at 2% relative to the weight of the activated carbon, add distilled water to the mixture and stir it evenly, and dry under the protection of nitrogen. The dried raw materials are added to the reactor, heated to a temperature of 900°C at a temperature rising rate of...

Embodiment 2

[0022] (1) KOH and K 2 CO 3 Prepare the composite activator at 1:1, then weigh the composite activator and oak charcoal at a mass ratio of 3:1, add distilled water and mix well, soak for 12h at room temperature, and then at a temperature of 120°C under 150ml / min of nitrogen dry. The dried mixture is placed in a reactor under a stream of nitrogen for activation, the activation temperature is 800°C, the activation time is 60 min, and the activation is completed and cooled to room temperature. Finally, the activated carbon was repeatedly washed and filtered with distilled water until the filtrate was neutral, dried under the protection of nitrogen at 120°C, and collected for use.

[0023] (2) Load Ni at 2% relative to the weight of the activated carbon, add distilled water to the mixture and stir it evenly, and dry under the protection of nitrogen. The dried raw materials are added to the reactor, heated to a temperature of 900°C at a temperature rising rate of 5°C / min and a nitrog...

Embodiment 3

[0027] (1) Weigh K according to mass ratio 1:1 2 CO 3 And oak charcoal, add distilled water and mix well, soak at room temperature for 12h, and then dry at 120℃ under 150ml / min nitrogen. The dried mixture is placed in a reactor under a stream of nitrogen for activation, the activation temperature is 900°C, the activation time is 120 min, and the activation is completed and cooled to room temperature. Finally, the activated carbon was repeatedly washed and filtered with distilled water until the filtrate was neutral, dried under the protection of nitrogen at 120°C, and collected for use.

[0028] (2) Load Ni at 5% relative to the weight of the activated carbon, add distilled water to the mixture and stir it evenly, and dry under the protection of nitrogen. The dried raw materials are added to the reactor, heated to a temperature of 900°C at a heating rate of 5°C / min and a nitrogen flow rate of 100ml / min, and kept for 120 minutes, then cooled naturally.

[0029] (3) The activated ca...

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Abstract

The invention discloses a production method of active carbon of a direct carbon conversion fuel cell, which mainly comprises the steps of: producing carbonization material by taking biomass such as oak scobs or bamboo chip, and the like as raw material; taking K2CO3 or and the mixture of K2CO3 and KOH as a activating agent; activating the carbonization material under the carbonization temperatureof 750-1000 DEG C and the atmosphere of nitrogen to obtain the active carbon; loading active carbon by means of Ni with additive to improve the electric conduction performance of the active carbon; and leaching with acid solution to increase the type and the content of the oxygen-containing functional group on the surface of the active carbon and reduce the ash content of the active carbon. The specific surface area of the treated active carbon can be reach 1967 m<2> / g; the volume resistivity can be reduced at 1654 mu omega.m; the type and the content of the oxygen-containing functional groupare increased; the ash content is greatly reduced; and the specific surface area, the electric conduction performance, the ash content and the combination property of the surface oxygen-containing functional group are better adapted to the requirement of direct carbon fuel cell to fuel, compared with the raw materials of the existing direct carbon fuel cell such as black lead, active carbon, petroleum coke and the like.

Description

Technical field [0001] The invention is a method for preparing activated carbon for direct conversion of carbon fuel cells, and relates to the field of fuel cells and activated carbon. Background technique [0002] Fuel cell is a device that directly converts chemical energy in fuel into electrical energy. It has high power generation efficiency, low pollutant emissions, and CO 2 Emissions can be reduced by 40-60%, with low noise (<60dB); modular structure; high variable load rate (20-120%); both centralized and decentralized power supply; small footprint. Therefore, fuel cells are known as the fourth-generation power generation device following hydropower, thermal power and nuclear power. Direct carbon fuel cell (DCFC), as a high temperature fuel cell, directly uses solid carbon as fuel. Compared with hydrogen-oxygen fuel cell, it has the following advantages: the theoretical efficiency of the battery is close to 100%; the source of solid carbon fuel is wide; The fuel has a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/38C01B31/08
CPCY02E60/12Y02E60/10
Inventor 仲兆平张居兵郭厚焜金保升黄亚继
Owner SOUTHEAST UNIV