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Investigations of Bubble Size, Gas Hold-Up, and Bubble Rise Velocity in Quadrilateral Bubble Column Using High-Speed Camera
Current Issue
Volume 4, 2017
Issue 1 (January)
Pages: 5-15   |   Vol. 4, No. 1, January 2017   |   Follow on         
Paper in PDF Downloads: 81   Since Jun. 7, 2017 Views: 1691   Since Jun. 7, 2017
Authors
[1]
Mohd Amirul Syafiq Mohd Yunos, Faculty of Engineering, Universiti Putra Malaysia, Selangor, Malaysia; Plant Assessment Technology Group, Malaysian Nuclear Agency, Selangor, Malaysia.
[2]
Nur Khairunnisa Abd Halim, Faculty of Engineering, Universiti Putra Malaysia, Selangor, Malaysia.
[3]
Siti Aslina Hussain, Faculty of Engineering, Universiti Putra Malaysia, Selangor, Malaysia.
[4]
Hamdan Mohamed Yusoff, Faculty of Engineering, Universiti Putra Malaysia, Selangor, Malaysia.
[5]
Susan Sipaun, Plant Assessment Technology Group, Malaysian Nuclear Agency, Selangor, Malaysia.
Abstract
In this work, we have quantified the influence of superficial gas velocity and sparger design on bubble size, gas hold-up, and bubble rise velocity in quadrilateral bubble column test rig (0.2 x 0.2 m in cross-section and 2 m in height). Six sparger designs were used to generate homogeneous to heterogeneous flow regime for the investigation of the effect of superficial gas velocity and sparger design on gas holdup and bubble size distribution in a bubble column. This study has proved that the air distributor optimization can be recognized using high-speed camera technique. The size of bubbles inside the column is also affected by the size of orifice diameter and number of holes of the sparger. This study concludes that Sparger C and Sparger D design with orifice size 0.5 mm may use optimum gas flow rate to generate homogeneous bubbly flow with higher gas hold-up for better mixing process in this bubble column reactor. At heterogeneous flow regime, it was observed that the sparger orifice diameter shown little impact on the column behavior. The experimental results also can subsequently be applied to the development and validation of the proper mathematical model.
Keywords
Bubble Column Reactor, High-Speed Camera, Gas Hold-Up, Sparger Plate, Superficial Gas Velocity, Bubble Rise Velocity
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