Determination of nitrogen diffusivities in liquid cyclohexane over a wide temperature range |
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| Affiliation: | 1. Department of Process, Energy and Environmental Technology, University of South-Eastern Norway, 3918 Porsgrunn, Norway;2. Department of Material Sciences and Process Engineering, University of Natural Resources and Life Sciences, 1190 Vienna, Austria;1. Heat Pipe and Thermal Management Research Group, College of Engineering, Design and Physical Sciences, Brunel University, London UB8 3PH, UK;2. Vytautas Magnus University, Studentu Str. 11, Akademija, Kaunas District LT-53362, Lithuania;3. Department of Sustainable and Renewable Energy Engineering, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates;4. Air Products PLC, Hersham Place Technology Park, Molesey Road, Surrey KT12 4RZ, UK |
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| Abstract: | The diffusivity of nitrogen in liquid cyclohexane has been measured at temperatures from 21 °C to 140 °C and at pressures of 10 – 15 atm, using a high pressure wetted sphere absorber apparatus. The diffusivity increased from 4.0 × 10−5 cm2 s−1 to 2.8 × 10−4 cm2 s−1 over this temperature range.Rippling of the film at the higher flow rates restricted the flow rate range which could be utilized for the diffusivity determinations. The measured absorption rates for flows in which rippling occurred were up to 15% higher on a 20 mm sphere and up to 40% higher on a 30 mm sphere. This limited the suitability of the wetted sphere absorber for this type of work. |
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