SURFACE AREA AND POROSITY

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BET Brunauer, Emmett and Teller (BET), most common method used to describe specific surface area: The BET equation – W= weight of gas adsorbed P/P 0 =relative pressure Wm = weight of adsorbate as monolayer C = BET constant
BET equation requires a linear plot of 1/[W(P/P 0 )-1] against P/P 0 Slope (s) Intercept (i) Wm (weight of monolayer)
Page 1 and 2: presented by Neal Leddy CMA Analyti
Page 3 and 4: Characteristics of Physical Adsorpt
Page 5 and 6: Iostherm types described by Brunaue
Page 7 and 8: Type II Most frequently found when
Page 9 and 10: Type IV Occur on porous adsorbents
Page 11: Adsorbate The most common adsorbat
Page 15 and 16: Single point BET: Involves determin
Page 17 and 18: Relative Pressure P/Po Volume @ STP
Page 19 and 20: Langmuir The Langmuir equation des
Page 21 and 22: Porosity - pore volume Total pore v
Page 23 and 24: Adsorption/Desorption Isotherm
Page 25 and 26: Other Methods Barrett-Jo
Page 27 and 28: Analysis Adsorbate is introduced i

SURFACE AREA AND POROSITY

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