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Ammonia and related chemicals as potential indirect hydrogen storage materials

Lan, R. and Irvine, J. T. S. and Tao, S. W. (2012) Ammonia and related chemicals as potential indirect hydrogen storage materials. International Journal of Hydrogen Energy, 37. pp. 1482-1494. ISSN 0360-3199

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Abstract

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.