US 5,447,024 A · Chemical-looping combustion power generation plant system

Abstract

A chemical-looping combustion method uses a metallic oxide (MO) as an oxygen carrier. A fuel (RH) reduces MO at a low temperature in a first reactor, a reduced product (M) is oxidized by oxygen in moistened air in a high-temperature region in a second reactor to form MO which is recycled to the first reactor. Heat generated within these reactors is utilized to drive gas turbines. The reactions within the first and second reactors are: RH+MO.fwdarw.mCO.sub.2 +nH.sub.2 O+M (1) M+0.50.sub.2 .fwdarw.MO (2) Moistened air is the oxygen source in the second reaction. The metallic oxides and their reduced products are particulates including an oxygen permeable medium. The loss of energy in the conversion reactions and in heat exchange is reduced, power generation efficiency is improved, CO.sub.2 is recovered and water resources are saved.

Claims13

Dependent claims

A chemical-looping combustion power generation method, utilizing first and second reactors, said method comprising:

reacting a hydrocarbon fuel with a metallic oxide in said first reactor to produce a first off gas containing carbon dioxide and water and to reduce at least a portion of said metal oxide to a reduced solid product;
passing said first off gas through a first turbine to drive said first turbine, thereby generating power;
transferring said reduced solid product to said second reactor;
introducing air into said second reactor for oxidation of said reduced solid product and production of a second off gas by said oxidation;
passing said second off gas through a second turbine to generate additional power;
transferring the oxidized metal from said second reactor to said first reactor;
and
adding water to said air introduced into the second reactor to moisten said air.

5 more elements

Dependencies are inferred from the claim text.

Chemical-looping combustion power generation plant system

Life of this patent

Chemical-looping combustion power generation plant system

Life of this patent

Abstract

Claims13