Apparatus for thermally-stabilizing carbon material precursor and method for thermally-stabilizing carbon material precursor using the same

Patent metadata

Field	Value
Publication number	US-10883200-B2
Application number	US-201916381293-A
Country	US
Kind code	B2
Filing date	Apr 11, 2019
Priority date	May 25, 2018
Publication date	Jan 5, 2021
Grant date	Jan 5, 2021

Abstract

An apparatus for thermally-stabilizing a carbon material precursor having a heating apparatus which thermally-stabilizes a carbon material precursor, a thermometer for measuring a temperature in the heating apparatus, a water vapor concentration meter for measuring a concentration of water vapor in the heating apparatus, and a batch type thermal-stabilization apparatus for feedback-controlling the temperature in the heating apparatus by using the concentration of water vapor as an index such that generation of water vapor in a thermal-stabilization reaction of the carbon material precursor is completed and generation of water vapor in a partial oxidation reaction of the carbon material precursor is suppressed in a temperature range between a temperature range where the generation of water vapor is accelerated in the thermal-stabilization reaction and a temperature range where the generation of water vapor is accelerated in the partial oxidation reaction.

First claim

What is claimed is:

1. An apparatus for thermally-stabilizing a carbon material precursor comprising:
a heating apparatus which thermally-stabilizes a carbon material precursor;
a temperature measuring means for measuring a temperature in the heating apparatus;
a water vapor concentration measuring means for measuring a concentration of water vapor in the heating apparatus; and
a temperature control means for feedback-controlling the temperature in the heating apparatus by using the concentration of water vapor as an index such that generation of water vapor in a thermal-stabilization reaction of the carbon material precursor is completed and generation of water vapor in a partial oxidation reaction of the carbon material precursor is suppressed in a temperature range between a temperature range where the generation of water vapor is accelerated in the thermal-stabilization reaction and a temperature range where the generation of water vapor is accelerated in the partial oxidation reaction.

2. The apparatus for thermally-stabilizing a carbon material precursor according to claim 1 , wherein
in the temperature control means, the temperature range between the temperature range where the generation of water vapor is accelerated in the thermal-stabilization reaction of the carbon material precursor and the temperature range where the generation of water vapor is accelerated in the partial oxidation reaction of the carbon material precursor is set to T 1 or more and T 2 or less, where
a maximum value of the concentration of water vapor generated in the thermal-stabilization reaction of the carbon material precursor is denoted by C max1 and a temperature corresponding to the maximum value is denoted by T max1 ,
a maximum value of the concentration of water vapor generated in the partial oxidation reaction of the carbon material precursor is denoted by C max2 and a temperature corresponding to the maximum value is denoted by T max2 ,
a minimum value of the concentration of water vapor generated in a temperature range between T max1 and T max2 is denoted by C min and a temperature corresponding to the minimum value is denoted by T min ,
a temperature where the concentration of water vapor takes a mean value of C max1 and C min (C max1 +C min )/2, in a temperature range between T max1 and T min is denoted by T 1 , and
a temperature where the concentration of water vapor takes a mean value of C min and C max2 (C min +C max2 /2, in a temperature range between T min and T max2 is denoted by T 2 .

3. The apparatus for thermally-stabilizing a carbon material precursor according to claim 2 , wherein
the temperature control means is a means for feedback controlling the temperature in the heating apparatus such that the concentration of water vapor in the heating apparatus is equal to or less than an average value of the concentration of water vapor in the temperature range between T 1 or more and T 2 or less.

4. A method for thermally-stabilizing a carbon material precursor which uses the thermal-stabilization apparatus according to claim 1 , comprising the steps of:
measuring a temperature in the heating apparatus;
measuring a concentration of water vapor in the heating apparatus; and
feedback-controlling the temperature in the heating apparatus by using the concentration of water vapor as an index such that generation of water vapor in a thermal-stabilization reaction of the carbon material precursor is completed and generation of water vapor in a partial oxidation reaction of the carbon material precursor is suppressed in a temperature range between a temperature range where the generation of water vapor is accelerated in the thermal-stabilization reaction and a temperature range where the generation of water vapor is accelerated in the partial oxidation reaction.

5. The method for thermally-stabilizing a carbon material precursor according to claim 4 , wherein
in the step of controlling the temperature, the temperature range between the temperature range where the generation of water vapor is accelerated in the thermal-stabilization reaction of the carbon material precursor and the temperature range where the generation of water vapor is accelerated in the partial oxidation reaction of the carbon material precursor is set to T 1 or more and T 2 or less, where
a maximum value of the concentration of water vapor generated in the thermal-stabilization reaction of the carbon material precursor is denoted by C max1 and a temperature corresponding to the maximum value is denoted by T max1 ,
a maximum value of the concentration of water vapor generated in the partial oxidation reaction of the carbon material precursor is denoted by C max2 and a temperature corresponding to the maximum value is denoted by T max2 ,
a minimum value of the concentration of water vapor generated in a temperature range between T max1 and T max2 is denoted by C min and a temperature corresponding to the minimum value is denoted by T min ,
a temperature where the concentration of water vapor takes a mean value of C max1 and C min , (C max1 +C min )/2, in a temperature range between T max1 and T min is denoted by T 1 , and
a temperature where the concentration of water vapor takes a mean value of C min and C max2 (C min +C max2 /2, in a temperature range between T min and T max2 is denoted by T 2 .

6. The method for thermally-stabilizing a carbon material precursor according to claim 5 , wherein
in the step of controlling the temperature, the temperature in the heating apparatus is feedback-controlled such that the concentration of water vapor in the heating apparatus is equal to or less than the average value of the concentration of water vapor in the temperature range between T 1 or more and T 2 or less.

Assignees

• Toyota Chuo Kenkyusho Kk

Inventors

• Nomura Kazuhiro
• Morishita Takuya

Classifications

• F27D21/0014

  Devices for monitoring temperature · CPC title

• D01F9/225

  from stabilised polyacrylonitriles · CPC title

• D01F9/32 Primary

  Apparatus therefor · CPC title

• F27D2019/0012

  Monitoring the composition of the atmosphere or of one of their components · CPC title

• F27B17/00

  Furnaces of a kind not covered by any of groups F27B1/00 - F27B15/00 (structural combinations of furnaces F27B19/02) · CPC title