1. 课题研究的工作开展汇报 Lijing Fan 2013.9.28

2. Existing problem Sample conversion rate change over time TEM image of the “nanopod” CaCO 3 Absorption ratio of CaO at 600 ℃ Higher-magnification SEM image CO 2 adsorption capacity at 650 ℃. Inset: the rate of CO 2 adsorption Ind. Eng. Chem. Res.2009 ， Synthesis and Characterization of CaO Nanopods for High Temperature CO 2 Capture. J. Mater. Chem. A, 2013, 1, Synthesis, characterization, and high temperature CO 2 capture of new CaO-baed hollow sphere sorbents.

3. Different SEM images of CaCO 3 NaCO 3 +CaCl 2 CaCO 3 PEO-b-PMAA-SDS Adv. Mater.2002, Biomimetic Morphogenesis of Calcium Carbonate in Mixed Solutions of Surfactants and Double-Hydrophilic Block Copolymers.

4. Materials Letters.2013,4.Synthesis of template-free hollow vaterite CaCO 3 microspheres in the H 2 O/EG system Template-free hollow CaCO 3 Hollow CaCO 3 micro-spheres were synthesized with the reaction between Ca(CH 3 COO) 2 and NaHCO 3 in a solvent mixture of H 2 O and EG. A:Ca(CH 3 COO) 2 (1 mL,0.3M),H 2 O(2mL) and EG(10mL) B: NaHCO 3 (1 mL,0.3M), H 2 O (2mL) and EG(10mL) Procedure: (1).At room temperature the mixture was further stirred for 4h and a suspension of CaCO 3 was obtained. (2).The products were collected after centrifugation, washing with water and ethanol. (3). Dry the product at 80 ℃ under vacuum.

5. Template-free hollow CaCO 3 (a) SEM image of CaCO 3 microspheres; (b) the particle diameter distribution of CaCO 3 microspheres; (c) high magnification SEM image of typical broken microspheres; (d) TEM image of the hollow microspheres. Schematic illustration of a possible formation process for the hollow spherical CaCO3, and typical SEM micrographs of vaterite CaCO3are shown: (a) reaction for5 min; (b) reaction for 30 min

6. (a)(b) (c)(d) (a) 、 (b)CaCO 3 (c) 、 (d)CaCO 3 /Al 2 O 3 Experiment 0.5M Ca(CH 3 COO) 2 50ml + 0.5 M NaHCO 3 50ml + 50ml H 2 O,25ml EG Mixing and stirring 8h

7. Experiment (a) CaCO 3 calcite at 700 ℃， carbonate at 600 ℃ /650 ℃ (b) CaCO 3 calcite at 700 ℃， carbonate at 650 ℃ (c) CaCO 3 with additive calcite at 700 ℃， carbonate at 650 ℃ (a) (b) (c)

8. Existing problem 1.size 2.hollow TEM image (a):CaCO 3 (b):CaO (a) (b)

9. Intact hollow shells of mesoporous CaCO 3 Nature,1995,Fabrication of hollow porous shells of calcium carbonate from self-organizing media Honeycomb arrays of porous calcium carbonate Preparation method: 1.Prepare calcium bicarbonate solution by bubbling carbon dioxide gas through an aqueous suspension of calcium carbonate. 2.Add dropwise to a rapidly stirred DDAB/tetradecane mixture(DDAB:(C 12 H 25 ) 2 (CH 3 ) 2 NBr). 3.Removal of the surfactant result in the honeycomb arrays of porous calcium carbonate.

10. Work plan 1.Repeat the literature to synthesize Template-free hollow CaCO 3 and test its adsorption capacity for CO 2. 2.Attempt to add optimal amount Al(NO) 3 to obtain adsorbent with good sintering resistance and stability. 3.Refer to the literature,synthesizing honeycomb arrays of porous calcium carbonate and test its adsorption capacity for CO 2.

12. Mechanism