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Ethylcellulose membrane has been selected on the basis of Hansen's solubility parameter and Flory-Huggins interaction parameter for the enrichment of hydrazine and monomethylhydrazine (MMH) liquid propellants by pervaporation. An extensive study of the overall mass transfer resistance experienced by the permeants has been conducted. The resistance values were quantitatively estimated by changing the...
Studies of the states of water, hydrazine and hydrated hydrazine in ethylcellulose membrane were made for various mass fractions of solvents using differential scanning calorimetry (d.s.c.). Four or five energetically distinct states of these species in the membrane were identified and their quantitative estimations made. A new peak of enthalpy of mixing was identified at higher temperatures. Such...
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