Freundlich adsorption isotherm: Physical Chemistry

**** Your ****** below:-Freundlich ********** *********** *** year 1909 Freundlich ********* ** empirical ******** for representing the ********** ********* ** adsorption ** * ******** ** *** ******** by **** **** ** ***** adsorbent **** ******** **** ******** ** known ** ********** ********** Isotherm ** Freundlich ********** equation ** simply Freundlich *********************** x/m * ********** per **** of ********* ***** ** ******** ** ******** *** ****** ** ********* *** by *** ****** of the ********* **** ** ******** k and * *** ********* ***** ****** depend **** ********* *** *** ** ********** temperature Though Freundlich ******** ********* *********** *** ************ of ********** with pressure ** lower ****** it ****** ** predict value ** adsorption ** higher pressure **** ******** ** ****** as *** ********** ********** isotherm ** see *** ********* ******* *** value ** x/m ** ********** with ******** ** p but as ****** ** does *** ******** ******** **** ***** ** **** ****** the ********** isotherm ************************************************************************************ the ********** ** * ***** ****************************************************************************************************************************************************** ** * ***** ** *** *** ** plotted ******* *** * it **** ** * straight **** ** the following ********************************************************************************* **** *** ***** ** ***** equal ** *** *** the ***** ** ********* ***** ** *** * can ** ******** Over and above ** *** ***** ** *** *** against *** * comes *** ** ** a ******** **** it *** ** ******* **** *** ********** ********** ******** ** satisfied *** **** **************** Adsorption ************* **** ****** ******** published * *** model ******** *** ***** ******** to ****** ***** ******** *** **** ** ** * ************** ******** ******* **** * proposed kinetic mechanism **** isotherm was ***** ** ********* assumptions one ** which ** **** ******* *********** ****** ******* ******** gaseous ********* *** *** **** gaseous *********** ** based ** four *************** surface ** *** ********* ** ******* **** ** all *** ********** ***** *** ****************** ********* do *** interactAll adsorption occurs ******* *** same mechanismAt the maximum ********** **** * ********* ** ******* ********* ** ********* ** *** ******* ** ***** ******* ******** ********* ** adsorbate **** ** the free surface ** the ***************** suggested **** ********** takes place ******* **** ********************* http://vlabamritaedu/userfiles/1/image/adsorption%202JPG Where A(g) * unadsorbed ******* moleculeB(s) * ********** ***** ********* = ******** gaseous *********** ****** *** ******* **** constants *** k and ******** ** *** theory Langmuir derived an ******** ***** ********* *** relationship ******* *** ****** ** ****** sites ** *** ******* undergoing ********** *** ******** **** ******** ** ****** ******** ************************************************************************************************************************************************************** *** ****** ** ***** ** the surface ***** *** covered **** gaseous moleculeP= ********* *** *** *********** ******** for ************ ** ********* ******* *** ******* *** *** *** phase *** ***** limitation ** ******** adsorption ******** ** **** ** is ***** at low ******** onlyAt ***** ******** ** ** so ***** that factor ****** ** denominator *** ****** ** ******* ** Langmuir ******** reduces totheta=KPAt **** ******** ** ** so large **** ****** ****** ** denominator is nearly equal ** KP ** ******** ******** ******* ********************************* ******** **** ***** ******* the ********** ***** place ** ****** an ********* ********* ****** ** **** ** an ******************* *** **** ******* ** the **** ** ********* ******* **** moldings ** ********* **** hydrodynamic ********* ******* 05 *** 10 ****** **** **** high ******** ********** high ******* stability and small **** diameters ***** ******* ** ****** exposed ******* **** *** ***** **** ******* ******** *** ************* ********** **** **** **** * distinct **** structure ***** ******* fast transport ** *** ******* vaporsMost industrial adsorbents **** **** *** ** three classes:Oxygen-containing ********* * *** ********* *********** *** ***** ********* materials **** ** ****** *** *** ******************** ********* * Are ********* *********** *** ********* ********* ********* **** as ********* ****** *** ********************* compounds - *** ***** ** ********* ********** groups ** * ****** polymer *************** ****** is used *** adsorption of ******* substances *** non-polar adsorbates *** it ** **** ******* used *** waste *** **** ***** ****** treatment ** ** *** most widely **** ********* ***** **** of *** ******** *** surface groups) and physical ********** *** pore **** distribution *** surface ***** can be tuned ********* ** what is ****** *** usefulness **** ******* **** *** large micropore **** sometimes mesopore) volume *** *** ********* **** ******* area Mechanism ** ********** ***** ********************************************************************************** of ************** ********* ** adsorption is ************ ************* catalysisin gas ***** where ********* ******** ******* ********* ******* the ******** ** ********* and *********** cane ******* creating ****** ** adsorbing ***** ** ********* ********** ************** ** separate the ************* ** a mixtureto ******* ******** ** the ********** ** ******** ** ****** ***** ******* ********** to *********** *** *** ***** ***** ** ********* as ********* ********* Flouroscein) Procedure ** adsorption:500 ** ** 05N oxalic **** solution ** prepared **** well ******* ***** ******** ******* **** ml) are ***** *** *** labeled ***** * * ** *** ********* animal ******** *** ********** ******* *** *********** ********* into **** of *** ******* ** ***** of a ******* 50 40 ** 20 *** ** ml ** *** ****** **** *** added ******** ** 10 20 ** *** ** ml of ********* ***** ** that *** ***** volume *** ml) ******* ******** ** **** ****** ***** bottles **** ****** ********** ****** for an **** by means of * ********** shaker and they *** *** ***** ** * trough ********** ***** ** reach equilibriumThe *********** liquid of **** ** *** bottles *** ******** through * ***** *** ****** ***** and *** ******** ** ********* ** properly ******* ******* ********** ******* * ml ** ** ** of the filtrate ** rejected) ** ** ** the ******** ** ******** *** **** * clean ******* flask It ** titrated ******* ************ ***** solution until * **** colour ******* *** ********* ** ******** ** *** concordant ****** From *** titre ****** the ************* ** ****** **** ********* *** hence *** ****** ** ****** **** ******** are calculatedIn ***** ** **** *** ******** ** ********** adsorption ******** plot *** ***** against *** ** *** ****** and ********** of *** **** will **** *** *** *** * ************ *** ***** * *** * *** ** ********************************************************************** of Langmuir adsorption ******** can ** ****** ** plotting ******** ** ** * linear plot ******** shoe the ************* ** *** ******** ********* *** constants *** and "b" from *** ***** and intercept ** *** ******** *******************************************************************************************************************************************************************************************************************************************************************************************************************************************************

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