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Surface modification of carbon materials via heat and acid treatment

M. Sanip, Suhaila and Sulaiman, Yusran and Dewi, Juliana and Buang, Nor Aziah and Ismail, Ahmad Fauzi (2004) Surface modification of carbon materials via heat and acid treatment. In: The XXI Regional Conference and Workshop on Solid State Science & Technology 2004, 12-13 Oktober 2004, Hyatt Regency Kinabalu, Sabah, Malaysia.

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Abstract

Hydrogen is a great energy carrier for both mobile and stationary power generation. However, the availability of hydrogen as a power source is hindered due to lack of cost, effectiveness and safe storage solutions. Thus, one of the key areas for commercialization of hydrogen-powered vehicles is the development of safe methods for hydrogen storage. Gas-on-solid adsorption presents itself as the safest method for hydrogen storage. It is a more energy efficient method than either chemical or metal hydrides as well as compressed gas storage. Much work has been done to study the hydrogen storage properties of high surface area carbon materials.In this work, the effect of pretreatment on activated carbons and graphite were studied. Both carbon materials were treated with 4 M hydrochloric acid and heat at 600 ° C in an inert atmosphere condition respectively. The surface area and morphology of the treated samples were thoroughly investigated using nitrogen adsorption and scanning electron microscopy techniques. It was found that acid treatment increases the surface area of activated carbon due to the opening up of the internal surface area and widening of the pores. Graphite however, displayed a smaller surface area after acid treatment as a result of the disruption of the ordered lattice layer. Increase in the surface area was also seen for both carbon materials after heat treatment thereby enhancing their adsorption properties.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Acid treatment, carbon materials, heat treatment, hydrogen storage
Subjects:T Technology > T Technology (General)
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:6074
Deposited By: Norhani Jusoh
Deposited On:26 Aug 2008 10:50
Last Modified:01 Jun 2010 15:38

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