Seite - 119 - in Advanced Chemical Kinetics
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CA0 is the initial concentrationofA,
k is the rateconstantwithunitsasmolL�1min�1and
t is time inminutes,
andthat, k isdependenton temperature,
k¼A:e� EA
RT (2)
where k is the rateconstantwithunitsasmolL�1h�1
A is thepre-exponential factor, specific to this reaction
EA is theactivationenergyof the reaction,
R is thegasconstant8.314 Jmol�1K�1 and
T is the temperature inKelvin.
Figure4 shows theplotofglycerol conversionasa functionof time forexperiments thatwere
carriedoutat 60and90�C.Usually, k is regardedas the rate coefficient of theoverall reaction,
which is somemeasure of catalyst activity, but in essence, as shownbyEqs. (1) and (2), k is
temperature-dependent, aswell as concentration-dependent, usuallydependent on the initial
concentrationof the reactant.
Figure3. Initial rateasa functionofcatalystmass forglyceroloxidationover0.9-wt%Au/γ-Al2O3 (106–150mμ):1000rpm,
NaOH/glycerol=2:1,at60�C,under8.5-barO2pressure.
Oxidation of Glycerol to Lactic Acid by Gold on Acidified Alumina: A Kinetic and DFT Case Study
http://dx.doi.org/10.5772/intechopen.70485 119
zurück zum
Buch Advanced Chemical Kinetics"
Advanced Chemical Kinetics
- Titel
- Advanced Chemical Kinetics
- Autor
- Muhammad Akhyar Farrukh
- Herausgeber
- InTech
- Ort
- Rijeka
- Datum
- 2018
- Sprache
- englisch
- Lizenz
- CC BY 4.0
- ISBN
- 978-953-51-3816-7
- Abmessungen
- 18.0 x 26.0 cm
- Seiten
- 226
- Schlagwörter
- Engineering and Technology, Chemistry, Physical Chemistry, Chemical Kinetics
- Kategorien
- Naturwissenschaften Chemie