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Pervaporation performance of PPO membranes in dehydration of highly hazardous mmh and udmh liquid propellants.
- Source :
-
Journal of hazardous materials [J Hazard Mater] 2015 May 15; Vol. 288, pp. 69-79. Date of Electronic Publication: 2015 Feb 09. - Publication Year :
- 2015
-
Abstract
- Polyphenylene oxide (PPO) membranes synthesized from 2,6-dimethyl phenol monomer were subjected to pervaporation-based dehydration of the highly hazardous and hypergolic monomethyl hydrazine (MMH) and unsymmetrical dimethyl hydrazine (UDMH) liquid propellants. Membranes were characterized by TGA, DSC and SEM to study the effect of temperature besides morphologies of surface and cross-section of the films, respectively. Molecular dynamics (MD) simulation was used to study the diffusion behavior of solutions within the membrane. CFD method was employed to solve the governing mass transfer equations by considering the flux coupling. The modeling results were highlighted by the experimental data and were in good agreement. High separation factors (35-70) and reasonable water fluxes (0.1-0.2 kg/m(2)h) were observed for separation of the aqueous azeotropes of MMH (35 wt%) and UDMH (20 wt%) and their further enrichment to >90% purity. Effect of feed composition, membrane thickness and permeate pressure on separation performance of PPO membranes were investigated to determine optimum operating conditions.<br /> (Copyright © 2015 Elsevier B.V. All rights reserved.)
- Subjects :
- Algorithms
Calorimetry, Differential Scanning
Membranes, Artificial
Microscopy, Electron, Scanning
Models, Molecular
Temperature
Water chemistry
1,2-Dimethylhydrazine chemistry
Aerosol Propellants chemistry
Hazardous Substances chemistry
Hydrazines chemistry
Monomethylhydrazine chemistry
Phenols chemistry
Polymers chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1873-3336
- Volume :
- 288
- Database :
- MEDLINE
- Journal :
- Journal of hazardous materials
- Publication Type :
- Academic Journal
- Accession number :
- 25698568
- Full Text :
- https://doi.org/10.1016/j.jhazmat.2015.02.020