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A study on hydrogen storage through adsorption in nanostructured carbons

David Langohr 1
1 CEP/Sophia
CEP - Centre Énergétique et Procédés
Abstract : This work is based on the study of hydrogen storage through adsorption in nanostructured carbon materials, and was divided in three parts: a literature review on hydrogen storage, the set-up of an experimental test bench devoted to the measurements of hydrogen storage, and finally the work presents the experimental results of hydrogen storage on two different families of carbon materials produced in the laboratory thanks to two different processes. The literature review presents the various techniques available for storing hydrogen such as liquefaction and compression and is essentially concentrated on the experimental techniques used for measuring hydrogen storage with their difficulties and controversies. A critical point of view is given on the large scatter of the experimental results on the various carbon materials used for hydrogen storage. The experimental test bench has been designed, thanks to a volumetric method, for measuring the amount of hydrogen desorbed from a large mass of carbon (a minimum of 10 grams is required) at a temperature of 25°C and a pressure of 100 bars. Two calculations are presented, one for measuring the excess of hydrogen desorbed from the carbon as compared to a system in pure compression and the second one is based on the intrinsic weight percent of hydrogen stored in the carbon material. In addition to these calculations, a complete study of the errors generated during the measurements is presented as well as a full calibration of the experimental set-up with three different means. Ultimately, the work presents the nanostructured carbon materials produced thanks to two different processes: a sol-gel process for the production of carbon aerogels and a high temperature plasma process for the production of carbon nanostructures. After structural characterisation, all the samples have been tested using the same experimental protocol and the results show storage capacities lower than 0.5 wt% of hydrogen in the carbon.
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Submitted on : Tuesday, October 25, 2005 - 8:00:00 AM
Last modification on : Thursday, September 24, 2020 - 5:22:02 PM
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  • HAL Id : pastel-00001383, version 1

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David Langohr. A study on hydrogen storage through adsorption in nanostructured carbons. Engineering Sciences [physics]. École Nationale Supérieure des Mines de Paris, 2004. English. ⟨NNT : 2004ENMP1249⟩. ⟨pastel-00001383⟩

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