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High solids flux circulating carbonation reactor

A technology of reactor and circulating fluidized bed, applied in the field of capturing carbon dioxide CO2

Active Publication Date: 2014-12-03
GENERAL ELECTRIC TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if one considers the corresponding equilibrium carbon dioxide CO at 700°C 2 Partial pressure, for the same flue gas, may only be at most about 70% captured

Method used

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  • High solids flux circulating carbonation reactor

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Embodiment Construction

[0041] The carbonization reaction, that is, the CO in the flue gas according to the following reaction equation 2 and a sorbent material such as selected from metal oxides (MeO) to form MeCO 3 Reaction:

[0042] MeO + CO 2 →MeCO 3 + heat

[0043] The reaction is exothermic and proceeds at a temperature depending on the metal oxide used. Control of temperature is important to ensure an efficient reaction system that balances kinetic and equilibrium requirements. Carbon dioxide CO can occur using different metal oxides MeO that form metal carbonates such as limestone 2 catch. Metal oxides can also be part of synthetic solid particles. The metal oxide used in the present invention can be selected from calcium oxide CaO, magnesium oxide MgO, aluminum oxide Al 2 o 3 , zinc oxide ZnO and calcium magnesium oxide CaMgO, which form calcium carbonate (CaCO 3 ) (for example in the form of calcite or aragonite), magnesium carbonate (MgCO 3 ) (for example in the form of magnesi...

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Abstract

The present invention relates to a method for capturing carbon dioxide CO 2 by carbonation in a circulating fluidized bed (CFB) carbonation reactor (10) wherein temperature profile is adjusted by recirculation of solid fractions of metal oxide MeO and metal carbonate MeCO 3 to the CFB carbonation reactor (10). Also a system (1) recirculating the metal oxide MeO and metal carbonate MeCO 3 is provided by the invention.

Description

field of invention [0001] The invention relates to a carbonization reaction for capturing carbon dioxide CO 2 method, which involves recirculating the cooled MeCO 3 Enriched solids stream. In addition, the present invention relates to a system comprising a 2 Enriched flue gas captures carbon dioxide CO 2 of the reactor. Background of the invention [0002] Carbon dioxide capture can be implemented by carbonization reaction in a circulating fluidized bed (CFB) using solids of metal or mineral oxides 2 . Metal or mineral oxides used as carbon dioxide CO 2 The absorbent is a solid sorbent. [0003] The reactions that take place in the CFB carbonization reactor are exothermic, where the reaction rate depends largely on the available surface of the solid sorbent. In addition, in order to meet the reaction kinetics and equilibrium requirements of the absorption process, precise control of the temperature distribution is required. Therefore, reactor optimization must take ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/62B01D53/83F27B15/16
CPCB01D2251/402B01D2251/404B01D2257/504B01D53/83F27B15/16B01D53/96B01D53/62Y02C10/04C01B32/60Y02C20/40Y02P20/151C01F11/18B01D53/82B01J8/24B01D45/12
Inventor G.海恩兹O.斯塔尔曼恩M.巴费
Owner GENERAL ELECTRIC TECH GMBH
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