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Oksalik Asit Varlığında Kalsiyum Sülfat Dihidratın Büyüme Kinetiği

Growth Kinetics of Calcium Sulfate Dihydrate in the Presence of Oxalic Acid

Journal Name:

  • Journal of The Turkish Chemical Society, Section B: Chemical Engineering

Publication Year:

  • 2016

Key Words:

Keywords (Original Language):

Author NameUniversity of Author
Abstract (2. Language): 
This study is focused on the crystallization kinetics of calcium sulfate dihydrate. The reactive crystallization of calcium sulfate dihydrate in the absence and presence of 250 ppm, 1000 ppm, and 2500 ppm oxalic acid concentrations was carried out in a mixed-suspensionmixed- product-removal (MSMPR) type crystallizer. The growth kinetic of calcium sulfate dihydrate crystals was analyzed in accordance with size-independent and size-dependent growth models. It was found that the growth rates of calcium sulfate dihydrate crystals depend on the particle size and the kinetic parameters were evaluated according to Bransom, MJ2, and MJ3 models. Also, the relative coefficient, mean square error, and the mean square deviation were determined for each model and the results showed that MJ3 model was the best fitting model to the experimental data.
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Abstract (Original Language): 
Bu çalışma, kalsiyum sülfat dihidratın kristalizasyon kinetiği üzerine odaklanmaktadır. Kalsiyum sülfat dihidrat kristalizasyonu, sürekli beslemeli ve sürekli ürün çekişli (MSMPR) bir kristalizörde saf ortamda ve 250, 1000 ve 2500 ppm oksalik asit konsantrasyonlarında gerçekleştirilmiştir. Kalsiyum sülfat dihidrat kristallerinin büyüme kinetiği tane boyutundan bağımsız ve tane boyutuna bağlı büyüme modellerine göre analiz edilmiştir. Kalsiyum sülfat dihidrat kristal büyüme hızının tane boyutuna bağlı olduğu bulunmuş ve kinetik parametreler Bransom, MJ2 ve MJ3 modellerine göre değerlendirilmiştir. Ayrıca korelasyon katsayı, ortalama hata karesi ve varyans değerleri her model için hesaplanmış; MJ3 modelinin sistemi en iyi karakterize eden model olduğu bulunmuştur.
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