PROPİYONİK ASİTİN İZOBUTİL ALKOL İLE AMBERLYST 36 VE AMBERLYST 70 KATALİZÖRLERİ VARLIĞINDA ESTERLEŞME KİNETİĞİ

Öz

Propiyonik asidin izobütil alkol ile esterleşme tepkimesi, Amberlyst 36 ve Amberlyst 70 katalizörlerinin varlığında kesikli bir reaktörde çalışılmıştır. Bu çalışmada; karıştırma hızı (500-1000 rpm), katalizör tanecik boyutu (400-600 μm, 600+ μm), sıcaklık (318-348 K) ve katalizör miktarı (4-12 g kuru reçine / L) reaksiyon parametreleridir. Bir yalancı-homojen kinetik model türetilmiş ve tüm termodinamik ve kinetik parametreler hesaplanmıştır. Amberlyst 36 ve Amberlyst 70 için ileri reaksiyon hızı sabiti aşağıdaki gibi belirlenmiştir: 

k_1=160171 exp⁡((-56689)/RT) (L mol-1 min-1)

k_1=293314 exp⁡((-57292)/RT) (L mol-1 min-1)

Bu çalışmada kullanılan iki katalizörün karşılaştırmasında deneysel sonuçlar Amberlyst 70'in Amberlyst 36'dan daha etkili olduğunu göstermiştir.

Anahtar Kelimeler

• Esterleşme,yalancı homojen kinetik model,Amberlyst 36,Amberlyst 70,Heterojen kataliz

Kinetics of the Esterification of Propionic Acid with Isobutyl Alcohol over Amberlyst 36 and Amberlyst 70

Öz

The esterification of propionic acid with isobutyl alcohol has been studied in a batch reactor in the presence of Amberlyst 36 and Amberlyst 70 catalysts. Reaction parameters applied in this study are speed of agitation (500-1000 rpm), particle size of catalyst (400-600 µm, 600+ µm), temperature (318-348 K) and catalyst loading (4-12 g-dry resin/L). A pseudo-homogeneous kinetic model was derived and all thermodynamic and kinetic parameters were calculated. Forward reaction rate constant for Amberlyst 36 and Amberlyst 70 determined as follows:

k_1=160171 exp⁡((-56689)/RT) (L mol-1 min-1)

k_1=293314 exp⁡((-57292)/RT) (L mol-1 min-1)

In a comparison of the two catalysts used in this study, experimental results showed that Amberlyst 70 is more effective than Amberlyst 36.

Anahtar Kelimeler

• Esterification,pseudohomogeneous kinetics,Amberlyst 36,Amberlyst 70,Heterogeneous Catalysis

Kaynakça

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