Photochemical reaction system

Patent metadata

Field	Value
Publication number	US-2017370012-A1
Application number	US-201715697956-A
Country	US
Kind code	A1
Filing date	Sep 7, 2017
Priority date	Nov 20, 2012
Publication date	Dec 28, 2017
Grant date	—

Abstract

According to one embodiment, a photochemical reaction system comprises a CO 2 production unit, a CO 2 absorption unit, and a CO 2 reduction unit. The CO 2 reduction unit comprises a laminated body and an ion transfer pathway. The laminated body comprises an oxidation catalyst layer producing O 2 and H + by oxidizing H 2 O, a reduction catalyst layer producing carbon compounds by reducing CO 2 absorbed by the CO 2 absorption unit, and a semiconductor layer formed between the oxidation catalyst layer and the reduction catalyst layer and develops charge separation with light energy. The ion transfer pathways make ions move between the oxidation catalyst layer side and the reduction catalyst layer side.

First claim

1 - 12 . (canceled)

13 . A chemical reaction system, comprising:
a CO 2 reduction unit comprising: an oxidation catalyst layer producing O 2 and H + by oxidizing H 2 O; a reduction catalyst layer producing carbon compounds by reducing CO 2 ; and an ion transfer pathway making ions move between the oxidation catalyst layer and the reduction catalyst layer; a first chemical process unit chemically changing the carbon compounds from the CO 2 reduction unit and disposed in a first flow channel; and a second chemical process unit chemically changing the carbon compounds from the CO 2 reduction unit and disposed in a second flow channel different from the first flow channel.

14 . The system of claim 13 , wherein a manufacturing device and a manufacturing method in the first chemical process unit are different from a manufacturing device and a manufacturing method in the second chemical process unit.

15 . The system of claim 13 , wherein reaction conditions in the first chemical process unit are different from reaction conditions in the second chemical process unit.

16 . The system of claim 13 , wherein products produced by the first chemical process unit are different from products produced by the second chemical process unit.

17 . The system of claim 13 , further comprising a buffer tank handling products produced by the CO 2 reduction unit.

18 . The system of claim 17 , wherein the products produced by the CO 2 reduction unit and handled in the buffer tank differ depending on operating conditions within the CO 2 reduction unit.

19 . The system of claim 13 , wherein the CO 2 reduction unit supplies O 2 produced by the CO 2 reduction unit to the first chemical process unit and the second chemical process unit.

20 . A chemical reaction system, comprising:
a CO 2 reduction unit comprising: an oxidation catalyst layer producing O 2 and H + by oxidizing H 2 O; a reduction catalyst layer producing carbon compounds by reducing CO 2 ; and an ion transfer pathway making ions to move between the oxidation catalyst layer and the reduction catalyst layer; a CO 2 release unit which forms CO 2 by decomposing a CO 2 absorbent which has absorbed CO 2 and makes the decomposed CO 2 absorbent flow out to the CO 2 reduction unit; and a CO 2 storage unit storing the CO 2 decomposed by the CO 2 release unit.

21 . The system of claim 20 , wherein the CO 2 storage unit supplies the stored CO 2 to the CO 2 reduction unit.

22 . The system of claim 20 , wherein the decomposed CO 2 absorbent comprises CO 2 and the CO 2 reduction unit reduces the CO 2 contained in the decomposed CO 2 absorbent.

Assignees

• Toshiba Kk

Inventors

• Ono Akihiko
• Mikoshiba Satoshi
• Kudo Yuki
• Tamura Jun
• Kitagawa Ryota
• Huang Chingchun

Classifications

• B01J19/127

  Sunlight; Visible light · CPC title

• C07C51/00

  Preparation of carboxylic acids or their salts, halides or anhydrides (of acids by hydrolysis of oils, fats or waxes C11C) · CPC title

• C01B32/05

  Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30 · CPC title

• Y02E10/548

  Amorphous silicon PV cells · CPC title

• C01B32/50

  Carbon dioxide · CPC title