Porous carbon, humidity control adsorbent, adsorption heat pump, and fuel cell

Patent metadata

Field	Value
Publication number	US-2016199809-A1
Application number	US-201414911593-A
Country	US
Kind code	A1
Filing date	Jun 16, 2014
Priority date	Sep 6, 2013
Publication date	Jul 14, 2016
Grant date	—

Abstract

A porous carbon that can sufficiently adsorb water vapor on a high humidity side is provided.
A porous carbon is characterized by having mesopores and micropores and having a water vapor adsorbed amount ratio, as defined by the following expression (1), of 1.8 or higher. It is particularly preferable that the water vapor adsorbed amount ratio as defined by the following expression (1) be 2.0 or higher. It is also preferable that the water vapor adsorbed amount at a relative humidity of 70% be 50 mg/g or greater.
Water vapor adsorbed amount ratio=water vapor adsorbed amount at a relative humidity of 90%/water vapor adsorbed amount at a relative humidity of 70%.   (1)

First claim

1 - 10 . (canceled)

11 . A porous carbon characterized by comprising mesopores and micropores and having a mesopore volume of from 0.9 mL/g to 2.0 mL/g and a water vapor adsorbed amount ratio of 1.8 or higher, the water vapor adsorbed amount ratio being defined by the following expression (1):
Water vapor adsorbed amount ratio=water vapor adsorbed amount at a relative humidity of 90%/water vapor adsorbed amount at a relative humidity of 70%.

12 . The porous carbon according to claim 11 , wherein the mesopores have a pore diameter of from 3 nm to 50 nm.

13 . The porous carbon according to claim 12 , wherein the mesopores have a pore diameter of from 4.5 nm to 50 nm.

14 . The porous carbon according to claim 11 , wherein the water vapor adsorbed amount ratio is 2.0 or higher.

15 . The porous carbon according to claim 11 , wherein the water vapor adsorbed amount at a relative humidity of 70% is 50 mg/g or greater.

16 . The porous carbon according to claim 14 , wherein the water vapor adsorbed amount at a relative humidity of 70% is 50 mg/g or greater.

17 . The porous carbon according to claim 11 , wherein the water vapor adsorbed amount at a relative humidity of 90% is from 300 mg/g to 700 mg/g.

18 . The porous carbon according to claim 14 , wherein the water vapor adsorbed amount at a relative humidity of 90% is from 300 mg/g to 700 mg/g.

19 . The porous carbon according to claim 11 , wherein the micropore volume is from 0.3 mL/g to 0.7 mL/g.

20 . The porous carbon according to claim 14 , wherein the micropore volume is from 0.3 mL/g to 0.7 mL/g.

21 . A porous carbon characterized by comprising mesopores and micropores and having a water vapor adsorbed amount ratio of 1.8 or higher, the water vapor adsorbed amount ratio being defined by the following expression (1), and wherein the water vapor adsorbed amount at a relative humidity of 90% is from 512 mg/g to 700 mg/g:
Water vapor adsorbed amount ratio=water vapor adsorbed amount at a relative humidity of 90%/water vapor adsorbed amount at a relative humidity of 70%.

22 . The porous carbon according to claim 21 , wherein the water vapor adsorbed amount ratio is 2.0 or higher.

23 . The porous carbon according to claim 21 , wherein the water vapor adsorbed amount at a relative humidity of 70% is 50 mg/g or greater.

24 . The porous carbon according to claim 22 , wherein the water vapor adsorbed amount at a relative humidity of 70% is 50 mg/g or greater.

25 . The porous carbon according to claim 21 , wherein the mesopores have a pore diameter of from 3 nm to 50 nm, and the mesopore volume is from 0.9 mL/g to 2.0 mL/g.

26 . The porous carbon according to claim 25 , wherein the mesopores have a pore diameter of from 4.5 nm to 50 nm.

27 . The porous carbon according to claim 21 , wherein the micropore volume is from 0.3 mL/g to 0.7 mL/g.

28 . A humidity control adsorbent, characterized by using the porous carbon according to claim 11 as an adsorbent.

29 . An adsorption heat pump, characterized by using the porous carbon according to claim 11 as an adsorbent.

30 . A fuel cell, characterized by using the porous carbon according to claim 11 as a carbon-based carrier of an electrode.

Assignees

• Toyo Tanso Co

Inventors

• Kawano Takanori
• Morishita Takahiro
• Orikasa Hironori

Classifications

• Y02E60/50

  Fuel cells · CPC title

• B01J20/28073

  being in the range 0.5-1.0 ml/g · CPC title

• B01J20/28071

  being less than 0.5 ml/g · CPC title

• H01M4/96

  Carbon-based electrodes · CPC title

• B01J20/28083

  being in the range 2-50 nm, i.e. mesopores · CPC title