Study on Mass Transfer Enhancement in a Gas-Liquid System Using Nanomaterials

Document Type : Original Research Paper


1 Chemical engineering Department, University of Shahid Bahonar, Kerman, I.R. Iran

2 International Center for Science, High Technology and Environmental Science, Mahan, Kerman, I.R.Iran


The main objective of this paper is to examine the effect of nanomaterials on mass transfer coefficient in bubble type absorption of carbon dioxide by experiment. The absorption process is carried out in a bubble column and in room temperature. Mass transfer coefficient, saturated concentration of CO2, and gas holdup are determined in this system. The kinds of nanomaterials, the concentrations of each one and the gas superficial velocity are considered as the key parameters. The results show that the mass fraction of nanomaterials has an optimum value to the mass transfer coefficient and saturated concentration of CO2. 0.07% CNT nanofluid increases the mass transfer coefficient up to 78%. The superficial velocity of CO2 enhances mass transfer coefficient and gas holdup within the experimental range, whilst it has no effect on saturated concentration of CO2. In addition, nanomaterials in solution increase the gas holdup.


[1] R. Bacon, Growth, Structure, and Properties of Graphite Whiskers, Appl. Phys. Lett 31(2) (1960) 283-290.
[2] J.K.Kim, J.Y.Jung., Y. T.Kang.,. The effect of nano-particles on the bubble absorption performance in a binary nanofluid. International Journal of Refrigeration 29 (2006) 22–29.
[3] Y.T.Kang, A. Akisawa, T. Kashiwagi,. Analytical investigation of two different absorption modes: falling film and bubble types. International Journal of Refrigeration 23 (2000) 430–443.
[4] S.U.S.Choi, Enhancing thermal conductivity of fluids with nanoparticles. ASME International Mechanical Engineering Congress and Exposition, San Francisco, California November (1995)12-17.
[5] Wun-gwi Kim, Hyun Uk Kang, Kang-min Jung, Sung Hyun Kim,. Synthesis of Silica Nanofluid and Application to CO2 Absorption. Separation Science and Technology 43 (2008) 3036–3055.
[6] S.Krishnamurthy, P. Bhattacharya, P.E. Phelan, Enhanced Mass Transport in Nanofluids, Nano Letters 6 (2006) 419–423.
[7] G.Astarita, Carbon dioxide absorption in aqueous monoethanolamine Solutions. Chemical Engineering Science 16 (1961) 202–207.
[8] D.P.Rao, Design of a packed column for absorption of carbon dioxide n DEA promoted hot K2CO3solution.Gas Separation and Purification 4 (1990) 58–61.
[9] J.T.Cullinane, G.T.Rochelle, Carbon dioxide absorption with aqueous potassium carbonate promoted by piperazine. Chemical Engineering Science 59 (2004) 3619–3630.
[10] P.W.J Derks, T. Kleingeld, , C.V. Aken, J.A. Hogendoorn, G.F.Versteeg, Kinetics of absorption of carbon dioxide in aqueous piperazine solutions. Chemical Engineering Science 61(2006) 6837–6854.
[11] M.V.Dagaonkar, H.J. Heeres, A.A.C.M. Beenackers, , V.G. Pangarkar,.The application of fine TiO2 particles for enhanced gas absorption. Chemical Engineering Journal 92 (2003)151–159.
[12] R.L.Kars, R.J.Best, A.A.H.Drinkenburg, The sorption of propane in slurries of activecarbon in water. Chemical Engineering Journal 17 (1979) 201–210.
[13] Alper, E., Wichtendahl, B.,Deckwer, W.D., Gas Absorption mechanism in catalytic slurry reactors. Chemical Engineering Science 35 (1980) 217–222.
[14] L.S. Fan, O. Hemminger, Z.Yu, F. Wang,.Bubbles in nanofluids. Industrial andEngineering Chemistry Research 46 (2007) 4341–4346.