SURFACE AREA AND POROSITY

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Type III Characterised by heats of adsorption less than the adsorbate heat of liquification, adsorption proceeds as the adsorbate interaction with an adsorbed layer is greater than the interaction with the adsorbent surface
Type IV Occur on porous adsorbents with pores in the range of 1.5 – 100nm. At higher pressures the slope shows increased uptake of adsorbate as pores become filled, inflection point typically occurs near completion of the first 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: Type II Most frequently found when
Page 11 and 12: Adsorbate The most common adsorbat
Page 13 and 14: BET equation requires a linear plot
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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