Enhancement on CO₂ Bubble Absorption in MDEA Solution by TiO₂ Nanoparticles

Abstract:

TiO₂-N-methyldiethanolamine(MDEA)-H₂O nanofluids were prepared by dispersing TiO₂ nanoparticles in the 50wt% (mass fraction) MDEA solution. The stability of nanofluids was studied by the method of absorbance. Only with mechanical agitation, the nanofluids can keep stable at least 48 h without any dispersant. The surface tensions; kinematic viscosities and thermal conductivities of the MDEA solution were measured at the temperature of 20 °C when the TiO₂ na-noparticles concentration was 0.05wt%, 0.2wt%, 0.4wt% and 0.8wt%. The results show that they all increase with increasing concentration of the nanoparticles. The maximum enhancement of the surface tension, kinematic viscosity and thermal conductivity is 0.6 %, 4.6 % and 5.9 % respectively at the concentration of 0.8 wt%. The influence of nanoparticles on CO2 bubble absorption in the MDEA solution was studied. It can be found that the CO₂ absorption rate can be enhanced by 1.95%, 6.53%, 7.79%, 11.54% when the TiO₂ nanoparticles concentration is 0.05wt%, 0.2wt%, 0.4wt% and 0.8wt% respectively. The possible mechanisms for the phenomena in experiments and related results are also explained.

• Periodical: Advanced Materials Research (Volumes 631-632)
• Pages: 127-134
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.631-632.127
• Online since: January 2013
• Authors: Shu Hong Li, Yi Ding, Xiao Song Zhang
• Keywords: CO₂ Capture, Enhanced Gas Absorption, MDEA, Nanofluid, Nanoparticle

References

[1] G.T. Rochelle, Amine scrubbing for CO2 capture, Science 325(5948) (2009) 1652.

[2] Q.M. Xue, Y.P. Zhou, W. Su, Study on absorption of CO2 into aqueous N-methyldiethanolamine, Chemical Engineering 37(9) (2009) 1-4. (in Chinese).

[3] F.Y. Jou, A.E. Mather, F.D. Otto, Solubility of hydrogen sulfide and carbon dioxide in aqueous methyldiethanolamine solutions, Industrial & Engineering Chemistry Process Design and Development 21(4) (1982) 539-544.

DOI: 10.1021/i200019a001

[4] W. Kim, H.U. Kang, K. Jung, Synthesis of silica nanofluid and application to CO2 absorption, Separation Science and Technology 43(11-12) (2008) 3036-3055.

DOI: 10.1080/01496390802063804

[5] J.K. Lee, H. Kim, M.H. Kim, The effect of additives and nanoparticles on falling film absorption performance of binary nanofluids (H2O/LiBr+ Nanoparticles), Journal of Nanoscience and Nanotechnology 9(12) (2009) 7456-7460.

DOI: 10.1166/jnn.2009.1790

[6] S. Jana, S.K. Amin, W.H. Zhong, Enhancement of fluid thermal conductivity by the addition of single and hybrid nano-additives, Thermochimica Acta 462(1-2) (2007) 45-55.

DOI: 10.1016/j.tca.2007.06.009

[7] H.A. Al-Ghawas, D.P. Hagewiesche, G. Ruiz-Ibanez, Physicochemical properties important for carbon dioxide absorption in aqueous methyldiethanolamine, Journal of Chemical and Engineering Data 34(4) (1989) 385-391.

DOI: 10.1021/je00058a004

[8] X.F. Peng, X.L. Yu, L.F. Xia, Viscosity of low concentration nanofluids, Transactions of the Chinese Society for Agricultural Machinery 38(4) (2007) 138-141. (in Chinese).

[9] Y.M. Xuan, Q. Li, Energy transfer theory and application of nanofluids, Science Press, Beijing, 2010. (in Chinese).

[10] Q. Li, Y.M. Xuan, Measurement of thermal conductivities of nanofluids, Journal of Chemical Industry and Engineering (China) 54(1) (2003) 42-46. (in Chinese).

[11] W.D. Wu, C.W. Pang, W. Sheng, Enhancement on NH3/H2O bubble absorption in binary nanofluids by mono nano Ag, Journal of Chemical Industry and Engineering (China) 61(5) (2010) 1112-1117. (in Chinese).

[12] A. Schumpe, A.K. Saxena, L.K. Fang, Gas/liquid mass transfer in a slurry bubble column, Chemical Engineering Science 42(7) (1987) 1787-1796.

DOI: 10.1016/0009-2509(87)80183-5

[13] A.B. Pandit, J.B. Joshi, Three phase sparged reactors-some design aspects, Reviews in Chemical Engineering 2(1) (1984) 15.

DOI: 10.1515/revce.1984.2.1.1

[14] M. Jamialahmadi, H. Müller Steinhagen, Effect of solid particles on gas hold-up in bubble columns, The Canadian Journal of Chemical Engineering 69(1) (1991) 390-393.

DOI: 10.1002/cjce.5450690149

[15] S. Krishnamurthy, P. Lhattacharya, P.E. Phelan, Enhanced mass transport in nanofluids, Nano Letters 6(3) (2006) 419-423.