1. CF Technologies, Inc., 1 Westinghouse Plaza, Building D, Hyde Park, Massachusetts 02136, United States
2. Smith School of Chemical and Biomolecular Engineering, Cornell University, Snee Hall, Ithaca, New York 14853, United States
3. School of Earth and Atmospheric Sciences, Cornell University, Snee Hall, Ithaca, New York 14853, United States
4. Idaho National Laboratory, 775 University Boulevard, Idaho Falls, Idaho 83415, United States