Method of fabricating pelletized medium-high-temperature CO2 sorbent of Ca—Al—CO3
AssigneeInstitute of Nuclear Energy Research, Atomic Energy Council, Executive Yuan, R.O.C.
InventorsChing-Tsung Yu, Wun-Syong Chen, Huan-Ting Kuo
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Abstract
A sorbent for capturing CO2 is fabricated. The sorbent is pelletized and used under a medium or high temperature. The sorbent is mainly made of aluminum calcium carbonate (Ca—Al—CO3). The present invention has a controllable ratio for mixing Ca—Al—CO3 with a release agent (magnesium stearate, MgSt) and a binder (activated carbon, cement or bentonite). The sorbent has a good performance for anti-degradation under a high temperature with 100% of CO2. During 10 loops of use, 43.3˜47.5% of CO2 is captured with an initial amount up to 10 milli-moles per gram (mmol/g) and a stability ratio up to 91.2% maintained.
Claims7
A method of fabricating a pelletized medium-high-temperature carbon-dioxide (CO2) sorbent of calcium aluminum carbonate (Ca—Al—CO3), comprising steps of:
- (a) obtaining a powder of calcium aluminum carbonate (Ca—Al—CO3) by coprecipitation;
- and
- (b) mixing said powder of Ca—Al—CO3 with 1˜10 wt % of a release agent and 1˜10 wt % of a binder to obtain a pelletized carbon dioxide (CO2) sorbent through pelletization.
Dependencies are inferred from the claim text.