سال انتشار: ۱۳۹۱

محل انتشار: اولین کنفرانس بین المللی نفت، گاز، پتروشیمی و نیروگاهی

تعداد صفحات: ۸

نویسنده(ها):

S. Bos’hagh – Department of Chemical Engineering , Islamic Azad University, Shahrood Branch, Shahrood, Iran
Z.S. Aghamiri – Chemical Engineering Group, Faculty of Engineering, University of Kashan
F. Yazdian – Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran, Tehran, Iran
S.A Shojaosadati – Biotechnology Group, Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran

چکیده:

The resistance time distribution was modelled in a forced-liquid vertical tubular loop reactor with a working volume of around 3.5 L. The axial dispersioncoefficient was determined as a best fitting parameter of the model at gas and liquid superficial velocities between 0.01 to 0.06 m/s and 0.1 to 0.6 m/s,respectively. Effect of liquid and gas flow rates on liquid dispersion coefficient was investigated. In this work, gas-liquid separator volume had no remarkableinfluence on mixing time. Furthermore resistance time increased with an increase in H/D (geometrical parameters).In this reactor, resistance time is approximatelyhalf of resistance time in without reactor. Axial dispersion coefficient was calculated based on two different hypotheses. In modelling, loop bioreactor wasdivided into some sections by employing a set of ideal blocks for tubular sections and headspace. Axial dispersion model was used for tubular sections ofthe loop reactor, while once an ideal continuous stirred used for separator section. Finally, Bodenstein number was achieved