Bifunctional application of sodium cobaltate as a catalyst and captor through CO oxidation and subsequent CO₂ chemisorption processes [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 504.2 [Unassigned]
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Office of the Assistant Secretary of Energy for Fossil Energy ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2015
• Mô tả vật lý: Size: p. 2162-2170 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 267788
• Chủ đề: 1. 01 coal, lignite, and peat; 2. 03 natural gas; 3. 20 fossil-fueled power plants; 4. 37 inorganic, organic, physical, and analytical chemistry; 5. 54 environmental sciences

Tóm tắt

 The potential bifunctional mechanism of sodium cobaltate (NaCoO<
 sub>
 2<
 /sub>
 ) in the catalysis of CO oxidation and subsequent CO<
 sub>
 2<
 /sub>
  chemisorption was systematically analysed. Different catalytic and gravimetric experiments were performed dynamically and isothermally at multiple temperatures. Initially, the CO oxidation process was evaluated using a catalytic reactor connected to a gas chromatograph. Once the production of CO<
 sub>
 2<
 /sub>
  was confirmed, its chemisorption capacity with NaCoO<
 sub>
 2<
 /sub>
  was studied gravimetrically. Catalytic and gravimetric analysis products were studied by XRD, FTIR and SEM to elucidate the double reaction mechanism. Sodium cobaltate exhibited interesting catalytic properties over a wide temperature range, although the NaCoO<
 sub>
 2<
 /sub>
  crystalline structure and chemical composition changed during the CO<
 sub>
 2<
 /sub>
  capture process. Furthermore, all the experiments were theoretically supported by first-principles density functional theory thermodynamic calculations. Finally, the calculated thermodynamic properties of the CO oxidation and CO<
 sub>
 2<
 /sub>
  capture reactions with NaCoO<
 sub>
 2<
 /sub>
  under different oxidation conditions were in good agreement with the experimental measurements.