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Title: Status Report On Gelng Gelled( LNG)
Author: Mark Rudnicki, Lawrence C. Hoffman, Eugene m. Vander Wall
Source: American Gas Association 1980
Year Published: 1980
Abstract: Research conducted at Aerojet over the past two years has involved the characterization of gelled LNG (GELNG) with respect to process, flow, and use properties and a preliminary examination of the degree of safety enhancement attainable by gelation. The investigations have included: (1) an experimental examination of gel properties and gel safety characteristics (2) an analytical study involving the economics and preliminary design of an industrial scale gelation system and (3) steps toward provision of a portable gelator to expedite comparative LNG vs GELNG spill testing at substantial scale, e.g., 40 m Experimental work proved the superiority of water over methanol as a getting agent for LNG on the basis of minimization of gelant required to obtain a given gel structure. Yield stresses were measured over a range of get conditions and were found to increase with increasing gelant content. Similarly, determinations of rheological characteristics were conducted, revealing effects of gelant concentration. Gels flowed easily through flow coils, exhibiting shear thinning with no evidence of get structure degradation even after repeated shearing. Get expulsion from tanks was found to be dependent on tantc surface area. Expulsion efficiencies greater than 90 percent of those exhibited by LNG were obtained. There was litlte difference found between boiloff rates of LNG and GELNG under simulated storage conditions of low and moderate heat flux.

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