期刊
ENERGY & ENVIRONMENTAL SCIENCE
卷 4, 期 4, 页码 1400-1410出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0ee00347f
关键词
-
资金
- Spanish MICINN
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 m(2) 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 mu mol H-2 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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据