Carbon-dioxide capturing material, and carbon-dioxide recovery apparatus using same

Patent metadata

Field	Value
Publication number	US-2016199808-A1
Application number	US-201414914497-A
Country	US
Kind code	A1
Filing date	Oct 15, 2014
Priority date	Feb 14, 2014
Publication date	Jul 14, 2016
Grant date	—

Abstract

Provided is a carbon dioxide capturing material that captures a large amount of carbon dioxide, less suffers from decrease in an amount of the captured carbon dioxide even after firing, and has excellent heat resistance. The carbon dioxide capturing material separates and recovers carbon dioxide from a carbon-dioxide-containing gas. The capturing material includes an oxide containing Ce and Al. The oxide contains Ce in a highest content among metal elements in the oxide and contains Al in a content of 0.01% by mole to 40% by mole.

First claim

1 . A carbon dioxide capturing material for separating and recovering carbon dioxide from a carbon-dioxide-containing gas, the carbon dioxide capturing material comprising
an oxide containing Ce and Al, wherein the oxide contains Ce in a highest content among metal elements in the oxide and contains Al in a content of 0.01% by mole to 40% by mole.

2 . The carbon dioxide capturing material according to claim 1 ,
wherein the content of Ce is 40% by mole or more.

3 . The carbon dioxide capturing material according to claims 1 ,
wherein the oxide further contains at least one element selected from the group consisting of Fe, Cu, V, and Mo, the content of the element being 0.01% by mole or more.

4 . The carbon dioxide capturing material according to claim 3 ,
wherein the contents of Fe, Cu, V, and Mo meet a condition specified by Expression (1):
(Fe content)×1.0+(Cu content)×1.3+(V content)×3.3+(Mo content)×3.3≦10  (1)

wherein the contents in the expression are indicated in mole percent.

5 . The carbon dioxide capturing material according to claims 1 ,
wherein the oxide further contains 0.01% to 50% by mole in total of at least one element selected from the group consisting of La, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu.

6 . A carbon dioxide recovery apparatus using the carbon dioxide capturing material according to claim 1 .

7 . A carbon dioxide recovery apparatus comprising:
a reactor packed with the carbon dioxide capturing material according to claim 1 ; a line that introduces the carbon-dioxide-containing gas into the reactor; a line that discharges the carbon-dioxide-containing gas from the reactor; a heating unit that heats the reactor; and a condenser that condenses water vapor in the carbon-dioxide-containing gas.

8 . A carbon dioxide recovery apparatus comprising:
a reactor packed with the carbon dioxide capturing material according to of claims 1 ; a line that introduces the carbon-dioxide-containing gas into the reactor; a line that discharges the carbon-dioxide-containing gas from the reactor; a decompression unit that reduces an internal pressure of the reactor; and a condenser that condensates water vapor in the carbon-dioxide-containing gas.

9 . A carbon dioxide recovery apparatus comprising:
a reactor packed with the carbon dioxide capturing material according to claims 1 ; a line that introduces the carbon-dioxide-containing gas into the reactor; a line that discharges the carbon-dioxide-containing gas from the reactor; a pressurization unit that increases an internal pressure of the reactor; and a condenser that condenses water vapor in the carbon-dioxide-containing gas.

10 . The carbon dioxide recovery apparatus according to claim 7 , further comprising
a compressor disposed downstream from the condenser, the compressor compressing the carbon-dioxide-containing gas.

11 . The carbon dioxide recovery apparatus according to claim 7 ,
wherein the heating unit introduces a high-temperature gas into the reactor and brings the high-temperature gas into contact with the carbon dioxide capturing material.

12 . The carbon dioxide recovery apparatus according to claim 7 ,
wherein the heating unit is a heat-exchanging unit disposed in the reactor, and wherein the heating unit heats the carbon dioxide capturing material by passing a heat-transfer medium through the heat-exchanging unit.

13 . The carbon dioxide recovery apparatus according to claim 7 , further comprising
an arrangement that introduces a gas for reducing a carbon dioxide partial pressure in the reactor.

14 . The carbon dioxide recovery apparatus according to claim 13 ,
wherein the gas for reducing the carbon dioxide partial pressure is a water vapor.

Assignees

• Hitachi Chemical Co Ltd

Inventors

• Yoshikawa Kouhei
• Satou Hiroki
• Kaneeda Masato
• Nakamura Hidehiro
• Shirasaka Toshiaki
• KITAMURA Kenetsu
• Enomoto Kazuhiro

Classifications

• B01J20/08 Primary

  comprising aluminium oxide or hydroxide; comprising bauxite · CPC title

• B01D53/0462

  Temperature swing adsorption · CPC title

• B01D53/047

  Pressure swing adsorption · CPC title

• B01J20/3433

  of sorbents or filter aids other than those covered by B01J20/3408 - B01J20/3425 · CPC title

• B01D2255/40

  Mixed oxides · CPC title