Evaluating methane storage targets: from powder samples to onboard storage systems

Prajwal, BP and Ayappa, KG (2014) Evaluating methane storage targets: from powder samples to onboard storage systems. In: ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, 20 (5-6). pp. 769-776.

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Abstract

The development of a viable adsorbed natural gas onboard fuel system involves synthesizing materials that meet specific storage target requirements. We assess the impact on natural gas storage due to intermediate processes involved in taking a laboratory powder sample to an onboard packed or adsorbent bed module. We illustrate that reporting the V/V (volume of gas/volume of container) capacities based on powder adsorption data without accounting for losses due to pelletization and bed porosity, grossly overestimates the working storage capacity for a given material. Using data typically found for adsorbent materials that are carbon and MOF based materials, we show that in order to meet the Department of Energy targets of 180 V/V (equivalent STP) loading at 3.5 MPa and 298 K at the onboard packed bed level, the volumetric capacity of the pelletized sample should be at least 245 V/V and the corresponding gravimetric loading varies from 0.175 to 0.38 kg/kg for pellet densities ranging from 461.5 to 1,000 . With recent revision of the DOE target to 263 V/V at the onboard packed bed level, the volumetric loadings for the pelletized sample should be about 373 V/V.

Item Type:	Journal Article
Publication:	ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
Additional Information:	Copy right for this article belongs to the SPRINGER, VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	22 Aug 2014 09:17
Last Modified:	22 Aug 2014 09:17
URI:	http://eprints.iisc.ac.in/id/eprint/49649

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