The DAM/Dacron tuft concept is known commercially as Superfloc. Two different, flat, rectangular MLI panels, one incorporating a butt joint, were constructed of of 11 double-aluminized Mylar (DAM) radiation shields separated by Dacron tuft spacers. The time and purge gas usage required to purge a multilayer insulation (MLI) panel with gaseous helium by means of gas diffusion to obtain a condensable gas (nitrogen) concentration of less than 1 percent within the panel are stipulated. Purging of a multilayer insulation with dacron tuft spacer by gas diffusion This new proprietary Hybrid Argon Recovery Progress (HARP) plant is an effective alternative to a conventional all-cryogenic plant. This paper presents the novel features of a process which employs a combination of pressure swing adsorption (PSA) and cryogenic technology to separate the argon from this hydrogen depleted purge gas stream. The resulting hydrogen depleted purge gas, which is usually used for fuel, is an attractive source of argon. Maclean, D.L.Ī number of ammonia plants employ membranes or cryogenic hydrogen recovery units to separate hydrogen contained in the purge gas for recycle to the ammonia synthesis loop. Argon recovery from hydrogen depleted ammonia plant purge gas using a HARP PlantĭOE Office of Scientific and Technical Information (OSTI.GOV)
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