Physisorption Analysis of Porous solids Ranjan Kumar Dash Advisor: Prof. Yury Gogotsi March 11, 2004 http://nano.materials.drexel.ed Contents Background 」 Theory of Adsorption Porosity Measurement Critical Comments and Conclusion
1 http://nano.materials.drexel.edu Physisorption Analysis of Physisorption Analysis of Porous Solids Porous Solids Ranjan Kumar Dash Ranjan Kumar Dash Advisor: Prof. Yury Gogotsi Advisor: Prof. Yury Gogotsi March 11, 2004 http://nano.materials.drexel.edu Contents Contents 11 Background Background 33 Porosity Measurement Porosity Measurement 44 Critical Comments and Conclusion Critical Comments and Conclusion 22 Theory of Adsorption Theory of Adsorption
Applications of Porous Materials Catalys Molecular sIeves Biomedical Application membranes Energy storage http://nano.materials.drexel.edu Degree of Porosity Surface area Porosity Pore size and its distribution Pore volume
2 http://nano.materials.drexel.edu Applications of Porous Materials Applications of Porous Materials Molecular sieves Energy storage Catalyst Membranes Application Biomedical http://nano.materials.drexel.edu Degree of Porosity Degree of Porosity Pore size and its distribution Pore volume Surface area Porosity
tp: //nano. materials. drexel. ec Types of Pores Inter-connected Closed (o Passing (open) Dead end F. Rouquerol, J. Rouquerol, K S w. Sing, Adsorption by Powders and Porous olds. Academic Press. 1-25, 1999 Shapes of Pores Cylindrical Pore Conical Shapes Interstices Spherical or k Bottle F. Rouquerol, J. Rouquerol, K S W. Sing, Adsorption by Powders and Porous Solids, Academic Press, 1-25, 1999
3 http://nano.materials.drexel.edu Types of Pores Types of Pores Dead end (open) Closed Inter-connected (open) Passing (open) F. Rouquerol, J. Rouquerol, K. S. W. Sing, Adsorption by Powders and Porous Solids, Academic Press, 1-25, 1999 http://nano.materials.drexel.edu Shapes of Pores Shapes of Pores Conical Interstices Cylindrical Slits Spherical or Ink Bottle Pore Shapes F. Rouquerol, J. Rouquerol, K. S. W. Sing, Adsorption by Powders and Porous Solids, Academic Press, 1-25, 1999
Size of Pores (IUPAC Standard Micropores Mesopores Macropores 2 50 http://nano.materials.drexel.edu Techniques for Porosity Analysis adsorption Mercur Neutron scatterin echniques TEM scattering
4 http://nano.materials.drexel.edu Size of Pores (IUPAC Standard) Size of Pores (IUPAC Standard) 2 nm 50 nm Micropores Mesopores Macropores http://nano.materials.drexel.edu Techniques for Porosity Analysis Techniques for Porosity Analysis Mercury porosimetry TEM SEM Small angle X-ray scattering Small Angle Neutron scattering Gas adsorption Techniques
Techniques for Porosity Analysis Can measure only open pores y Pore size: 0.4 nm-50 nm adsorption Easy Established technique Mercury Neutron scattering Small angle scattering http://nano.materials.drexel.edu Techniques for Porosity Analysis adsorption Mercur Similar to ga adsorption r Can measure only open pores Pore size >1.5 nm echniques Easy Established technique
5 http://nano.materials.drexel.edu Techniques for Porosity Analysis Techniques for Porosity Analysis Mercury porosimetry TEM SEM Small angle X-ray scattering Small Angle Neutron scattering Gas adsorption Techniques ¾ Can measure only open pores ¾ Pore size : 0.4 nm – 50 nm ¾ Easy ¾ Established technique http://nano.materials.drexel.edu Techniques for Porosity Analysis Techniques for Porosity Analysis Mercury porosimetry TEM SEM Small angle X-ray scattering Small Angle Neutron scattering Gas adsorption Techniques ¾ Similar to gas adsorption ¾ Can measure only open pores ¾ Pore size >1.5 nm ¾ Easy ¾ Established technique