SEARCH · Engineering Papers
Results for “OSMOSIS”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Mineral Scaling on Reverse Osmosis Membranes: Role of Mass, Orientation, and Crystallinity on Permea
Explore the source record for details and available documents.
Regenerable Polyelectrolyte Membrane for Ultimate Fouling Control in Forward Osmosis
Not provided.
Matching Analysis of Mixed Matrix Membranes for Organic Solvent Reverse Osmosis
Not provided.
Forward Osmosis Desalination Using Thermoresponsive Ionic Liquids: Bench-Scale Demonstration and Cost Analysis
Not Available
Molecular Dynamics Simulations of Reverse Osmosis in Silica Nanopores
Not Available
Enhanced Forward Osmosis Desalination with a Hybrid Ionic Liquid/Hydrogel Thermoresponsive Draw Agent System
Not Available
Module-Scale Analysis of Pressure Retarded Osmosis: Performance Limitations and Implications for Full-Scale Operation
Explore the source record for details and available documents.
Concentrating ammonium in wastewater by forward osmosis using a surface modified nanofiltration membrane
Enhancing ammonium rejection by PEI modification.
Mechanisms and models for water transport in reverse osmosis membranes: history, critical assessment, and recent developments
Water scarcity is one of the greatest societal challenges facing humanity.
Enhanced electro-osmosis in propylene carbonate salt solutions
Properties of solid–liquid interfaces and surface charge characteristics mediate ionic and molecular transport through porous systems, affecting many processes such as separations. Herein, we report experiments designed to probe the electrochemical properties of solid–liquid interfaces using a model system of a single polyethylene terephthalate (PET) pore in contact with aqueous and propylene carbonate solutions of LiClO 4 . First, the existence and polarity of surface charges were inferred from current–voltage curves recorded when a pore was placed in contact with a LiClO4 concentration gradient. Second, the electro-osmotic transport of uncharged polystyrene particles through the PET pore provided information on the polarity and the magnitude of the pore walls’ zeta potential. Our experiments show that the PET pores become effectively positively charged when in contact with LiClO 4 solutions in propylene carbonate, even though in aqueous LiClO 4 , the same pores are negatively charged. Additionally, the electro-osmotic velocity of the particles revealed a significantly higher magnitude of the positive zeta potential of the pores in propylene carbonate compared to the magnitude of the negative zeta potential in water. The presented methods of probing the properties of solid–liquid interfaces are expected to be applicable to a wide variety of solid and liquid systems.
Irreversible thermodynamics of curved lipid membranes. II. Permeability and osmosis
We present a theory that combines the framework of irreversible thermodynamics with modified integral theorems to model arbitrarily curved and deforming membranes immersed in bulk fluid solutions. We study the coupling between the mechanics and permeability of a viscous and elastically bendable membrane, and a multicomponent bulk fluid solution. An equation for the internal entropy production for irreversibilities at the membrane is derived, determining the generalized thermodynamic forces and fluxes, from which we identify the deviatoric stress as a novel driving force for permeability. A complete set of equations of motion, constitutive laws, and boundary conditions to model the lipid membrane and bulk fluid system are provided.
Forward Osmosis-based System for Treatment of Waste Water Generated During Energy Production Using Waste Carbon Dioxide and Waste Heat. Final Report
The installation of COHO at a power plant will reduce the volume of wastewater, reduce the energy costs to treat wastewater, expand the capabilities of water treatment all while reducing the cost of carbon capture from flue gas. In Phase IIB studies, Porifera explored the use of a next-generation COHO system to synergistically capture carbon dioxide from flue gas and treat wastewater at power plants. We found that the next generation system benefits from improved operational efficiency and safety. In addition, we performed a technoeconomic analysis of the system and found it to save significant cost compared to conventional technologies.
Water purification by reverse osmosis using heterocyclic polymer membranes
Pyrrone (polyimidazopyrrolone) polymers are a new class of thermally stable, radiation and chemical resistant aromatic-heterocyclic polymers featuring a greater chemical and mechanical durability than cellulose acetate.
Synthesis of reverse osmosis membranes by plasma polymerization of allylamine.
Explore the source record for details and available documents.
Evaluation of 165 deg F reverse osmosis modules for washwater purification.
Three membrane systems have been evaluated for concentration at 165 F of wash-water contaminants. Membranes tested are polybenzimidazole (hollow fibers), cellulose acetate blend (spiral wound), and sulfonated polyphenylene oxide (plate-and-frame). Detailed membrane flux and rejection data are presented for 200-hr life tests with synthetic wash water, at two concentrations, and real wash water, at one concentration. Advantages and limitations of the membrane configurations, are discussed.
Design considerations for space mission wash water processing by reverse osmosis.
Explore the source record for details and available documents.