Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/66608
Title: Wetting enhancement of polypropylene plate for falling film tower application
Authors: Patil, D
Kumar, R
Xiao, F 
Keywords: Falling film tower
Polypropylene
Surface modification
Surfactant
Wetting factor
Issue Date: 2016
Publisher: Elsevier
Source: Chemical engineering and processing : process intensification, Oct. 2016, v. 108, p. 1-9 How to cite?
Journal: Chemical engineering and processing : process intensification 
Abstract: Falling film towers are popular for simultaneous heat and mass transfer applications due to modest air pressure drop and low energy demanding liquid distribution. Conventionally, metals are used as gas liquid contacting surface in these towers. Corrosion prone metallic surfaces need expensive anticorrosive coating or frequent replacement, whereas non metallic surfaces such as plastics have poor wetting characteristics. In current study, wetting factor of plain polypropylene and aluminum plates has been measured. Wetting enhancement methods: surfactant addition (sodium lauryl sulfate-SLS) and surface modification have been used on polypropylene plate. Improvement of 50% (SLS 300 ppm) and 80% (Modified Surface C) wetting characteristics of polypropylene have been achieved. Modified Surface C average wetting factor is 41% superior to aluminum surface. A new generalized empirical correlation for wetted area estimation considering influences of solid surface and fluid characteristics has been proposed. Proposed equation shows good agreement with current and past studies (MAPE 8.5%).
URI: http://hdl.handle.net/10397/66608
ISSN: 0255-2701
DOI: 10.1016/j.cep.2016.06.005
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