Metal ammines for safe energy storage

FUEL 244

Rasmus Zink Sørensen, zink@kemi.dtu.dk1, Asbjørn Klerke, aklerke@kemi.dtu.dk1, Jens S. Hummelshøj2, Jens K. Nørskov, norskov@fysik.dtu.dk2, and Claus H. Christensen1. (1) Center for Sustainable and Green Chemistry, Department of Chemistry, Technical University of Denmark, Kemitorvet 206, DK 2800 Lyngby, Denmark, (2) Center for Atomic-scale Materials Design, Technical University of Denmark, DK-2800 Lyngby, Denmark
Ammonia is a potential fuel for transportation with zero emissions. It has a high energy density, no carbon content and can be produced from renewable resources. However, liquid ammonia is not safe to carry on-board vehicles. This problem is addressed by storing ammonia reversibly in metal ammines. By selecting the right metal ammines, the temperature necessary for ammonia desorption can be chosen for individual applications. Ammonia desorption from four relevant ammines has been examined, and it is explained why ammonia release is facile even from compact bodies of metal ammine. When compacted, the volumetric ammonia content of metal ammines can be as high as in liquid ammonia. When released, this ammonia can be used in a solid oxide or direct ammonia fuel cell or be decomposed and the hydrogen used as fuel for low temperature fuel cells.
 

Chemistry of Carbon Materials and Nanomaterials
1:30 PM-3:45 PM, Thursday, April 10, 2008 Morial Convention Center -- Rm. 242, Oral

Division of Fuel Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008