Gizem GENÇ ÇELİKÇİ, Duygu UYSAL ZIRAMAN, Bekir Zühtü UYSAL

Yapılı dolgulu kolonda sıvı ve gaz fazı kütle transfer katsayıları ve ara yüzey alanı

Son yıllarda karbondioksitin (CO2) giderimi ve yapılı dolgulu kolonlarla ilgili çalışmalar ön plana çıkmaktadır. Bu doğrultuda yapılan bu çalışmada, kendi imkanlarımızla tasarlanarak imal edilen yeni özgün bir yapılı dolgulu kolonunun hidrodinamik ve kütle transfer katsayılarının karakterizasyonu yer almaktadır. İlk olarak basınç düşüşü ölçümleri ile kolonun yükleme ve taşma noktaları tespit edilmiş ve kolona beslenecek sıvı ve gaz akış hızlarının limitleri saptanmıştır. Sıvı ve gaz akış hızları için bu aralıklar sırasıyla 0,002-0,0047 [m/s] ve 0,07-0,68 [m/s] olarak belirlenmiştir. Belirlenen gaz ve sıvı akış hızlarında, sıvı tarafıve gaz tarafı bazlı bireysel fiziksel hacimsel kütle transfer katsayıları deneysel olarak elde edilmiştir. Daha sonra iki direnç teorisi ile CO2-su sistemi için gaz tarafı bazlı toplu fiziksel hacimsel kütle transfer katsayısı hesaplanmıştır. Ayrıca belirlenen gaz ve sıvı akış hızı aralıklarında, CO2 ve sodyum hidroksit çözeltisi sistemi ile deneyler yapılarak gaz tarafı bazlı toplu kimyasal hacimsel kütle transfer katsayıları , Hatta sayıları (Ha) ve artış faktörleri (E) hesaplanmıştır. Bu kimyasal sistem için elde edilen deneysel bulgular, hızlı sözde birinci dereceden reaksiyon rejiminin kabul edilebilir olduğunu göstermiştir. Son olarak farklı gaz ve sıvı akış hızlarında dolguların etkin ara yüzey alanı değerleri de belirlenmiştir.

Anahtar Kelimeler:

Yapılı dolgu karakterizasyonu, basınç düşüşü, kütle transfer katsayıları, artış faktörü, etkin ara yüzey alanı

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