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However,whentheyincreasedtheheatingrate, theyinsteadonlywitnessedasinglepeak.This
peak was related to the solid state transition to the final product. For transitional values
between the twoextremes, they found that therewere relative contributions of bothdifferent
mechanisms.This is an importantobservationwhichshouldbeaccountedwhen investigating
thereactionkinetics inhighlyexothermicsystems. Indeed, it showsthat it ispossible tocontrol
the reactionmechanism depending on the applied experimental conditions. This effect was
confirmedbymanyresearchersboth forgaslessandgas-solid systems [36, 56, 158–162]and is
illustrated in Figure 8. Furthermore, depending on the reactionmechanism, it is possible to
controlboth the finalproductphasesandtheirmicrostructures, thusproducingmaterialswith
tailoredproperties.
10.TheNi/Alsystemasamodel forSHSkinetics
In theSHScommunity, theNi/Al systemhasbeenwidelyusedamodel system. Itwaschosen
because of its low ignition temperature, high oxidation resistance, and ease of processing.
Because of this, all of the abovementioned techniques havebeenutilized to studykinetics in
Figure 8. DTA-TG curves for the PTFE-Al2O3 systemusing heating rates of (a) 20, (b) 80, (c) 150, and (d) 160 Cmin 1
under an argon atmosphere. The additional lines are showing the changes in heat flow andmass percentage values.
Adapted fromHobosyanetal. [56].
Advanced Chemical
Kinetics180
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