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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received July 3, 2009
Accepted November 13, 2009

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Drag reduction in co-current down flow packed column using xanthan gum

Iyyaswami Regupathi Ponnan Ettiyappan JagadeeshBabu M. Chitra¹ Thanapalan Murugesan^2†

Department of Chemical Engineering, National Institute of Technology Karnataka, Mangalore 575 025, India, Iran ¹Department of Chemical Engineering, A. C. College of Technology, Anna University, Chennai 600 025, India, Iran ²Chemical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750, Tronoh, Perak, Malaysia

Korean Journal of Chemical Engineering, July 2010, 27(4), 1205-1212(8), 10.1007/s11814-010-0181-z

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Abstract

Drag reduction is one of the most important techniques for reducing energy consumption in a packed bed contactor. The present work involves an experimental investigation on flow regime transition for air-water system with and without drag reducing agent (DRA), two-phase pressure drop, friction factor and drag reduction using xanthan gum as DRA. Drag reduction was quantified from the two-phase pressure drop data. Based on the present observations it was found that the percentage drag reduction increases with an increase in the concentration of DRA and it is only_x000D_ effective in the range of 300 ppm to 800 ppm. The experimental results indicate that a maximum of 80% drag reduction was achievable using xanthan gum (800 ppm) as DRA. Furthermore, the experimental data were validated with the available literature correlations.

Keywords

Drag Reduction Packed Bed Down Flow Two-phase Friction Factor and Xanthan Gum

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