发明名称 |
SEPARATION OF CARBON DIOXIDE (CO2) FROM GAS MIXTURES BY CALCIUM BASED REACTION SEPARATION (CaRS-CO2) PROCESS |
摘要 |
A reaction-based process has been developed for the selective removal of carbon dioxide (CO<SUB>2</SUB>) from a multicomponent gas mixture to provide a gaseous stream depleted in CO<SUB>2</SUB> compared to the inlet CO<SUB>2</SUB> concentration in the stream. The proposed process effects the separation of CO<SUB>2</SUB> from a mixture of gases (such as flue gas/fuel gas) by its reaction with metal oxides (such as calcium oxide). The Calcium based Reaction Separation for CO<SUB>2</SUB> (CaRS-CO<SUB>2</SUB>) process consists of contacting a CO<SUB>2</SUB> laden gas with calcium oxide (CaO) in a reactor such that CaO captures the CO<SUB>2</SUB> by the formation of calcium carbonate (CaC0<SUB>3</SUB>). Once "spent", CaCO<SUB>3</SUB> is regenerated by its calcination leading to the formation of fresh CaO sorbent and the evolution of a concentrated stream of CO<SUB>2</SUB>. The "regenerated" CaO is then recycled for the further capture of more CO<SUB>2</SUB>. This carbonation-calcination cycle forms the basis of the CaRS-CO<SUB>2</SUB> process. This process also identifies the application of a mesoporous CaCO<SUB>3</SUB> structure, developed by a process detailed elsewhere, that attains >90% conversion over multiple carbonation and calcination cycles. Lastly, thermal regeneration (calcination) under vacuum provided a better sorbent structure that maintained reproducible reactivity levels over multiple cycles. |
申请公布号 |
WO2007046815(A2) |
申请公布日期 |
2007.04.26 |
申请号 |
WO2005US39263 |
申请日期 |
2005.11.01 |
申请人 |
THE OHIO STATE UNIVERSITY |
发明人 |
FAN, LIANG-SHIH;GUPTA, HIMANSHU;IYER, MAHESH, V. |
分类号 |
B01D53/62 |
主分类号 |
B01D53/62 |
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