Combined Hydrogen Production and Storage with Subsequent Carbon Crystallization


Development of a hydrogen economy will require significant advances in methods by which to produce, store, transport, and distribute hydrogen in an economically viable manner. Centralized hydrogen production methods currently in use are limited by an inefficient means to transport hydrogen to its point of use. Compressed and cryogenic storage methods do not meet density targets, and incremental advances in candidate solid-state storage materials are not likely to meet density or cost targets. Here we provide evidence of a combined hydrogen production and storage process that utilizes a low-cost carbon precursor that slowly evolves hydrogen at room temperature. The evolution of the trapped hydrogen appears to be kinetically limited as it continues in excess of one year; heating the material to modest temperatures accelerates hydrogen evolution. The parallel observation of a nanocrystalline diamond (NCD) byproduct suggests that the hydrogenative ball milling leads to a hydrogenated tetrahedral carbon form that rearranges to more stable crystalline carbon forms upon heating.


Chemical and Biochemical Engineering


Consortium for Premium Carbon Products from Coal
Pennsylvania State University. Institutes for the Environment
Pennsylvania State University. Energy Institute
Pennsylvania State University. Material Research Institute


Funding for the project has been provided by the Consortium for Premium Carbon Products from Coal (DEFC2603NT41874, Internal Agreement No. 2875- TPSU-DOE-1874), with partial support from PSU's Institutes for the Environment, Energy Institute, and Material Research Institute

Keywords and Phrases

Acid; Base; Buck Mountain anthracite coal; Carbon; coal; Cycloalkene; Cyclohexene; Hydrogen; Unclassified drug; Adsorption; Article; Crystal structure; Crystallization; Dehydrogenation; Fourier transformation; Heating; Hydrogen bond; Hydrogen production; Hydrogen storage; Mass spectrometry; photoluminescence; proton transport; storage; synthesis; thermogravimetry

International Standard Serial Number (ISSN)


Document Type

Article - Journal

Document Version


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© 2006 American Chemical Society (ACS), All rights reserved.

Publication Date

01 May 2006