Rates of Ammonia Absorption and Release in Calcium Chloride [electronic resource]

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Tác giả:

Ngôn ngữ: eng

Ký hiệu phân loại: 621.823 Shafts

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: Size: p. 11827-11835 : , digital, PDF file.

Bộ sưu tập: Metadata

ID: 257274

 After synthesis, ammonia can be selectively absorbed by calcium chloride
  nitrogen and hydrogen are not absorbed. The kinetics of release seem to be diffusion controlled. The kinetics of absorption are consistent with a first-order reaction after an initial period of a higher-order reaction, which may indicate a nucleation event. At 225 �C, both absorption and release show half-lives of around 10 min if the ammonia partial pressure is swung from 2 to 1 bar, which allows design of an absorber for the periodic separation of ammonia. Furthermore, when this absorber replaces the ammonia condenser in a conventional ammonia synthesis, the ammonia production at low pressure can have the same rate as the conventional process operating at higher pressure.
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