The Experts below are selected from a list of 14955 Experts worldwide ranked by ideXlab platform
Bart Van Der Bruggen - One of the best experts on this subject based on the ideXlab platform.
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general model for prediction of Solvent permeation through organic and Inorganic Solvent resistant nanofiltration membranes
Journal of Membrane Science, 2009Co-Authors: Siavash Darvishmanesh, Anita Buekenhoudt, Jan Degreve, Bart Van Der BruggenAbstract:The convective-diffusive nature of the transport mechanism through Solvent resistant nanofiltration (SRNF) has already been demonstrated extensively. A new semi-empirical model based on the traditional solution diffusion with imperfection model has been developed. In the newly developed model Solvent permeability was found to be dependent on viscosity, and two new defined non-dimensional parameters. These parameters reflect the surface tension and dielectric constant. The permeation of a homologous series of six primary alcohols through hydrophobic polymeric membrane (Solsep-030505) has been measured. The experimental results have been used to validate the new model. The result of the model fitting was well satisfactory. The model was also validated for a broad range of Solvents using additional filtration experiments. The permeation of various Solvents from different chemical families through a hydrophobic polymeric membrane (MPF 50) and a hydrophilic ceramic membrane (HITK 275) has been measured. The permeability values calculated with the new model showed a very high correlation over the entire range of Solvents used. The modelling results confirm the assumption of convective-diffusive transport in SRNF.
Siavash Darvishmanesh - One of the best experts on this subject based on the ideXlab platform.
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general model for prediction of Solvent permeation through organic and Inorganic Solvent resistant nanofiltration membranes
Journal of Membrane Science, 2009Co-Authors: Siavash Darvishmanesh, Anita Buekenhoudt, Jan Degreve, Bart Van Der BruggenAbstract:The convective-diffusive nature of the transport mechanism through Solvent resistant nanofiltration (SRNF) has already been demonstrated extensively. A new semi-empirical model based on the traditional solution diffusion with imperfection model has been developed. In the newly developed model Solvent permeability was found to be dependent on viscosity, and two new defined non-dimensional parameters. These parameters reflect the surface tension and dielectric constant. The permeation of a homologous series of six primary alcohols through hydrophobic polymeric membrane (Solsep-030505) has been measured. The experimental results have been used to validate the new model. The result of the model fitting was well satisfactory. The model was also validated for a broad range of Solvents using additional filtration experiments. The permeation of various Solvents from different chemical families through a hydrophobic polymeric membrane (MPF 50) and a hydrophilic ceramic membrane (HITK 275) has been measured. The permeability values calculated with the new model showed a very high correlation over the entire range of Solvents used. The modelling results confirm the assumption of convective-diffusive transport in SRNF.
Anita Buekenhoudt - One of the best experts on this subject based on the ideXlab platform.
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general model for prediction of Solvent permeation through organic and Inorganic Solvent resistant nanofiltration membranes
Journal of Membrane Science, 2009Co-Authors: Siavash Darvishmanesh, Anita Buekenhoudt, Jan Degreve, Bart Van Der BruggenAbstract:The convective-diffusive nature of the transport mechanism through Solvent resistant nanofiltration (SRNF) has already been demonstrated extensively. A new semi-empirical model based on the traditional solution diffusion with imperfection model has been developed. In the newly developed model Solvent permeability was found to be dependent on viscosity, and two new defined non-dimensional parameters. These parameters reflect the surface tension and dielectric constant. The permeation of a homologous series of six primary alcohols through hydrophobic polymeric membrane (Solsep-030505) has been measured. The experimental results have been used to validate the new model. The result of the model fitting was well satisfactory. The model was also validated for a broad range of Solvents using additional filtration experiments. The permeation of various Solvents from different chemical families through a hydrophobic polymeric membrane (MPF 50) and a hydrophilic ceramic membrane (HITK 275) has been measured. The permeability values calculated with the new model showed a very high correlation over the entire range of Solvents used. The modelling results confirm the assumption of convective-diffusive transport in SRNF.
Jan Degreve - One of the best experts on this subject based on the ideXlab platform.
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general model for prediction of Solvent permeation through organic and Inorganic Solvent resistant nanofiltration membranes
Journal of Membrane Science, 2009Co-Authors: Siavash Darvishmanesh, Anita Buekenhoudt, Jan Degreve, Bart Van Der BruggenAbstract:The convective-diffusive nature of the transport mechanism through Solvent resistant nanofiltration (SRNF) has already been demonstrated extensively. A new semi-empirical model based on the traditional solution diffusion with imperfection model has been developed. In the newly developed model Solvent permeability was found to be dependent on viscosity, and two new defined non-dimensional parameters. These parameters reflect the surface tension and dielectric constant. The permeation of a homologous series of six primary alcohols through hydrophobic polymeric membrane (Solsep-030505) has been measured. The experimental results have been used to validate the new model. The result of the model fitting was well satisfactory. The model was also validated for a broad range of Solvents using additional filtration experiments. The permeation of various Solvents from different chemical families through a hydrophobic polymeric membrane (MPF 50) and a hydrophilic ceramic membrane (HITK 275) has been measured. The permeability values calculated with the new model showed a very high correlation over the entire range of Solvents used. The modelling results confirm the assumption of convective-diffusive transport in SRNF.
Xule Guo - One of the best experts on this subject based on the ideXlab platform.
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a simple Inorganic Solvent thermal route to nanocrystalline niobium diboride
Journal of Alloys and Compounds, 2009Co-Authors: Zhiqing Feng, Ming Guo, Yixiu Sun, Weihua Song, Mingjin Lin, Xule GuoAbstract:Abstract Nanocrystalline NbB2 has been prepared via a simple Inorganic-Solvent-thermal route by the reaction of metallic magnesium powders with niobium pentoxide and boric acid in an autoclave at 650 °C. X-ray powder diffraction pattern indicated that the product was hexagonal niobium diboride (NbB2), and the cell constant was a = 3.115 A and c = 3.266 A. Scanning electron microscopy image showed that it consisted of particles with an average size of about 30 nm. The product was also studied by BET and TGA. It had good thermal stability and oxidation resistance below 500 °C in air. The molten salt, a mixture of sodium chloride and magnesium chloride, acting as Inorganic Solvent during the reaction, maybe plays an important role in the formation of nanocrystalline niobium diboride with a narrow particle size distribution.