Jump to main content
Jump to site search

Issue 4, 2011
Previous Article Next Article

High density hydrogen storage in superactivated carbons from hydrothermally carbonized renewable organic materials

Author affiliations

Abstract

Hydrothermally carbonized organic materials (furfural, glucose, starch, cellulose and eucalyptus sawdust) have been used as precursors to produce high-surface area carbons. The synthesis methodology comprises two steps: (i) hydrothermal carbonization of organic materials and (ii) chemical activation with KOH as activating agent. In this way, activated carbon materials with a high surface area (up to 2700 m2 g−1) and narrow micropore size distribution in the supermicropore range (0.7–2 nm) are produced. The textural properties of the activated carbon products can be easily tuned by modifying the activating conditions (i.e., the activation temperature and the amount of KOH used). The activated carbon materials exhibit high hydrogen uptakes, up to 6.4 wt%, and large isosteric heats of adsorption, up to 8.5 kJ mol−1. In particular, the hydrogen storage density of the carbons is high and ranges between 12 and 16.4 µmol H2 m−2. The hydrogen storage density is closely related to the pore size of the carbons, with small micropores (ca. 1 nm) favouring a high density. Taking into account the high hydrogen storage capacities of these materials, as well as the simplicity of their synthesis procedure and the ready availability and low-cost of the raw precursors, it can be concluded that these activated carbons constitute a promising adsorbent for hydrogen storage.

Graphical abstract: High density hydrogen storage in superactivated carbons from hydrothermally carbonized renewable organic materials

Back to tab navigation

Supplementary files

Publication details

The article was received on 09 Aug 2010, accepted on 20 Dec 2010 and first published on 28 Jan 2011


Article type: Paper
DOI: 10.1039/C0EE00347F
Energy Environ. Sci., 2011,4, 1400-1410

  •   Request permissions

    High density hydrogen storage in superactivated carbons from hydrothermally carbonized renewable organic materials

    M. Sevilla, A. B. Fuertes and R. Mokaya, Energy Environ. Sci., 2011, 4, 1400
    DOI: 10.1039/C0EE00347F

Search articles by author

Spotlight

Advertisements