Back to results
US 2010/0248956 A1Published application
Method of Fabricating Layered Nanomaterial Used for Mid-High Temperature CO2 Capture
AssigneeAtomic Energy Council-Institute of Nuclear Energy Research
InventorsChing-Tsung Yu, Yau-Pin Chyou, San-Yuan Chen, Chih-Hsiang Wu
Life of this patent
Estimating the term…
Abstract
A material is fabricated for capturing CO2 at mid-high temperature. The material is a layered material containing Ca, Al carbonates. A higher ratio of Ca to Al helps capturing CO2. The temperature for capturing CO2 is around 600° C. The material can even release CO2 at a high temperature. Thus, the material can process looping cycles of carbonation and decarbonization at a CO2 carbonation scale of 45% gCO2/g.
Claims7
A method of fabricating a layered nanomaterial used for mid-high temperature CO2 capture, comprising steps of:
- (a) obtaining nitrate solutions of Ca+2 and Al+3 as cationic solutions and obtaining NaOH solutions and Na2CO3 solutions as precipitated agents;
- (b) uniformly mixing said cationic solutions and said precipitated agents into a mixture solution;
- (c) processing a hydrothermal treatment to said mixture solution;
- (d) obtaining precipitates through centrifugal separation and precipitation;
- (e) water-washing said precipitates and then drying said precipitates to remove impurity of ions;
- and
- (f) processing said precipitates at a calcination temperature between 200° C. and 600° C. to obtain a CO2-capturing material which has Ca, Al carbonates,
- wherein said CO2-capturing material is a layered CO2-absorbing nanomaterial of Ca—Al—CO3 having a micropore structure of CaO;
- wherein said CO2-capturing material is formed of nanoparticles of Ca and Al having dispersed particle sizes in a ratio range of 1:1 to 13:1 for Ca:Al;
- wherein said CO2-capturing material has a structure of specific layered double hydroxides (LDHs) having metal oxide microcrystallines;
- and
- wherein said nanoparticles has nanopores from mesopores to micropores.
9 more elements
Dependencies are inferred from the claim text.