Carbon dioxide absorbent and carbon dioxide absorption...

Details Carbon dioxide absorbent and carbon dioxide absorption... Carbon dioxide absorbent and carbon dioxide absorption...

2008-08-27

2009-11-24

Lawrence, Frank M (Department: 1797)

Gas separation: processes

Solid sorption

Inorganic gas or liquid particle sorbed

Reexamination Certificate

active

07621980

ABSTRACT:
A carbon dioxide absorbent that can absorb carbon dioxide at a temperature lower than that of a conventional Ba2TiO4absorbent, as well as at a high temperature of at least 700° C., and desorb carbon dioxide at a temperature lower than that of the conventional absorbent is provided. The carbon dioxide absorbent does not expand significantly upon absorption of carbon dioxide, and exhibits high durability. The carbon dioxide absorbent is mainly composed of an oxide that contains Ba, Ca, and Ti, in which the molar ratio of Ca:(Ba+Ca) is 0.25:1 to 0.65:1, and the molar ratio of (Ba+Ca):Ti is 2.2:1 to 4.0:1. It preferably uses a green sheet, waste green sheet, waste green sheet laminate, or green sheet precursor used in a process of manufacturing electronic components can be as at least part of raw materials for making the carbon dioxide absorbent. A carbon dioxide absorption method using the carbon dioxide absorbent is also provided.

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Pfaff, G. “Synthesis and characterization of Ba2TiO4”, Journal of Materials Science Letters, pp. 1059-1060, 1991.
International Search Report, PCT/JP06/318860, mailed Nov. 2006.

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