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This content will become publicly available on November 7, 2018

Title: Converting Wind Energy to Ammonia at Lower Pressure

Renewable wind energy can be used to make ammonia. However, wind-generated ammonia costs about twice that made from a traditional fossil-fuel driven process. To reduce the production cost, we replace the conventional ammonia condensation with a selective absorber containing metal halides, e.g., calcium chloride, operating at near synthesis temperatures. With this reaction-absorption process, ammonia can be synthesized at 20 bar from air, water, and wind-generated electricity, with rates comparable to the conventional process running at 150–300 bar. In our reaction-absorption process, the rate of ammonia synthesis is now controlled not by the chemical reaction but largely by the pump used to recycle the unreacted gases. The results suggest an alternative route to distributed ammonia manufacture which can locally supply nitrogen fertilizer and also a method to capture stranded wind energy as a carbon-neutral liquid fuel.
ORCiD logo [1] ;  [2] ; ORCiD logo [1] ;  [1]
  1. Univ. of Minnesota, Minneapolis, MN (United States). Dept. of Chemical Engineering and Materials Science
  2. Univ. of Minnesota, Morris, MN (United States). West Central Research and Outreach Center
Publication Date:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
ACS Sustainable Chemistry & Engineering
Additional Journal Information:
Journal Name: ACS Sustainable Chemistry & Engineering; Journal ID: ISSN 2168-0485
American Chemical Society (ACS)
Research Org:
Univ. of Minnesota, Minneapolis, MN (United States). The Regents
Sponsoring Org:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
Country of Publication:
United States
10 SYNTHETIC FUELS; 17 WIND ENERGY; 25 ENERGY STORAGE; 36 MATERIALS SCIENCE; 74 ATOMIC AND MOLECULAR PHYSICS; Absorption; Energy storage; Mechanism; Metal halides; Reaction
OSTI Identifier: