Influence of solid particles on gas holdup and oxygen transfer in multiphase internal loop airlift reactor

Publish Year: 1385
نوع سند: مقاله کنفرانسی
زبان: English
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NICEC11_392

تاریخ نمایه سازی: 4 اردیبهشت 1386

Abstract:

Determination of gas holdup and oxygen transfer coefficient was conducted in an internal loop airlift reactor containing calcium alginate dispersed in a water-in diesel microemulsion media. The effect of riser superficial gas velocities in the range of 0.01 to 0.05m/s, solid loading (up to 15% v/v) and the size of solid particles (2-3mm and 3-4mm) on the gas holdup and volumetric oxygen transfer coefficient were studied in this work. All partial gas holdups and kLa increased, in the whole range of applied air superficial gas velocities. Gas holdup and kLa decreased with solid loading for calcium alginate with diameter 2-3mm can be due to bubble coalescence however for the 3-4mm calcium alginate beads a slightly increase in gas holdup and kLa was observed in low solid loading that related to bubble breakage.

Authors

Mahnaz Mansouri

Iran and Chemical Engineering Department, Tarbiat Modarres University, Tehran ۱۴۱۱۵-۱۴۳, Iran, Research & development section, Engineering & Development department, south pars gas company, Assalueh

Jafar Towfighi

Iran and Chemical Engineering Department, Tarbiat Modarres University, Tehran ۱۴۱۱۵-۱۴۳, Iran

Mohammad Reza Mehrnia

Iran and Chemical Engineering Department, Tarbiat Modarres University, Tehran ۱۴۱۱۵-۱۴۳, Iran

Mohammad mehdi Akbarnegad

۳-Iranian research of petroleum industry, Tehran ۱۸۷۴۵-۴۱۶۳, Iran

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