Better Absorbents for Ammonia Separation [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 621.45 Wind engines
• Thông tin xuất bản: Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2018
• Mô tả vật lý: Medium: ED : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 257284
• Chủ đề: 1. 17 wind energy; 2. 36 materials science; 3. 37 inorganic, organic, physical, and analytical chemistry; 4. Absorption; 5. Ammonia

Tóm tắt

 Making ammonia from renewable wind energy at a competitive price may be possible if the conventional ammonia condenser is replaced with an ammonia absorber. Such a process change requires an ammonia selective absorbent. Supported metal halide sorbents for this separation display outstanding dynamic capacity close to their equilibrium thermodynamic limits. Alkaline earth chlorides and bromides supported on silica and zeolite Y are the most promising. MgCl<
 sub>
 2<
 /sub>
  and CaBr<
 sub>
 2<
 /sub>
  at 40% loading on silica show capacities of 60-70 mg<
 sub>
 NH3<
 /sub>
 /gsorbent at 150 �C and 4 bar. Overall, cations with smaller atomic numbers show more affinity to ammonia
  bromides hold ammonia more strongly than chlorides. Different solvents and metal halide mixtures do not show significant changes in the absorption capacity. Finally, these absorbents can be incorporated into ammonia reaction-absorption syntheses to achieve faster production rates.