Ammonia and related chemicals as potential indirect hydrogen storage materials

R. Lan, J. T. S. Irvine, S. W. Tao

Research output: Contribution to journalArticle

382 Citations (Scopus)


We show that the saturation order of piecewise constant approximation in Lp norm on convex partitions with N cells is N−2/(d+1), where d is the number of variables. This order is achieved for any on a partition obtained by a simple algorithm involving an anisotropic subdivision of a uniform partition. This improves considerably the approximation order N−1/d achievable on isotropic partitions. In addition we show that the saturation order of piecewise linear approximation on convex partitions is N−2/d, the same as on isotropic partitions.
Original languageEnglish
Pages (from-to)1482-1494
Number of pages13
JournalInternational Journal of Hydrogen Energy
Publication statusPublished - 2012



  • hydrogen storage
  • hydrazine
  • Ammonia
  • exchange membrane
  • urea
  • carbon monoxide
  • Ammonium carbonate
  • decomposition
  • nitric oxide
  • proton conducting electrolyte
  • Fuel cell
  • oxide fuel cells
  • atmospheric pressure

Cite this