Personal Information

Yang-Xin Yu, Professor of Department of Chemical Engineering, Tsinghua University.

 

Research Interest

On the basis of the calculation of various interaction forces between molecules in system, by applying recent achievements from advanced statistical mechanics (integral equation theory, perturbation theory and density functional theory), molecular simulations and also conventional solution theories to develop new molecular thermodynamic models for complicated systems in chemical, bio-chemical and petroleum engineering (mixed solvent adsorption and multi-phase disperse system including electrolytes, micelles, and colloids); to investigate the fluid phase equilibria (vapor-liquid, liquid-liquid and solid-liquid equilibria) with industrial applications by both experiments and models; develops molecular models for the transport properties of polymer-colloidal solutions; develops advanced techniques from thermodynamic point of view for the comprehensive utilization of the energy and substances in the industrial waste gases.

 

Education

Doctorial Degree (Ph. D.): Tsinghua University, Department of Chemical Engineering, Beijing, P.R. China (January, 2005)

Graduate (M.S.): Tsinghua University, Department of Chemical Engineering, Beijing, P. R. China (April, 1991)

Undergraduate (B.E.): Tsinghua University, Department of Chemical Engineering, Beijing, P. R. China (July, 1988)


Work Experience

2005.12-present, Professor, Department of Chemical Engineering, Tsinghua University, Beijing, P. R. China

2002.10-2005.11, Associate professor, Department of Chemical Engineering, Tsinghua University, Beijing, P. R. China

2001.4-2002.9, Visiting associate researcher, Department of Chemical/Environmental Engineering, University of California, Riverside, California, USA

1998.7-2001.3, Associate professor, Department of Chemical Engineering, Tsinghua University, Beijing, P. R. China

1993.12-1998.6, Lecturer, Department of Chemical Engineering, Tsinghua University, Beijing, P. R. China

1991.4-1993.12, Assistant Professor, Department of Chemical Engineering, Tsinghua University, Beijing, P. R. China

 

Research Experience

  1. Developing molecular thermodynamic and diffusion models for globular protein-electrolyte solutions and colloidal dispersion systems. (since 2005)
  2. Developing primitive and non-primitive electrolyte activity coefficient models, EOS and surface tension for electrolyte solutions based on perturbation theory and mean spherical approximation (MSA) theory (since 1990)
  3. Using SAFT (statistical associating fluid theory) for real fluids (including chainlike, associating fluids) (since 1992)
  4. Measuring and modeling vapor-liquid (VLE), liquid-liquid (LLE) and solid-liquid equilibria (SLE): VLE for the systems containing TeEG (tetraethylene glycol) or sulfolane; LLE for the system water + 2-butanol + C4 hydrocarbons at high pressures; LLE for the system with mixed solvents such as TeEG and sulfolane; high pressure phase diagram for the natural gases containing CO2, H2S and water; solubility of sodium dimethyl isophthalate-5-sulfonate in water and in water-methanol mixtures containing sodium sulfate (since 1992)
  5. Developing advanced techniques for the comprehensive utilization of the energy and oils in the waste gases from the setting machines used in the printing and textile industry (since 2003)
  6. Developing density functional theory for nonuniform associating fluids, electrolyte solutions and polymers (since 2001)


Awards

  1.  “Study on electrolyte solution theory” was awarded as the first progressive award of science and technology sponsored by China’s National Educational Committee in 1994
  2. “Study on perturbation theory for fluids” was awarded as the second progressive award of science and technology sponsored by China’s National Educational Committee in 1998
  3. “Study on diffusion and thermodynamic properties of the system involved in chemical engineering” was awarded as the second progressive award of science and technology sponsored by the Chinese Petroleum and Chemical Engineering Society in 2006



Peer-reviewed Periodical articles

  1. Zheng Yuan-Xiang, Yu Yang-Xin, Li Ying-Feng, An Equation of State for the Isotropic-Nematic Phase Transition of Semiflexible Polymers,Ind. Eng. Chem. Res., 50(50): 6460-6469 (2011)
  2. Yu Yang-Xin, Li Ying-Feng, Zheng Yuan-Xiang, Thin-thick film transitions on a planar solid surface: A density functional study, Chinese Physics Letters, 27(3): 037101 (2010)
  3. Zhang Xu-Guang, Yu Yang-Xin, A viscosity equation for polyatomic fluids under normal and high pressures, Fluid Phase Equilibria, 295: 237-243 (2010)
  4. Li Ying-Feng, Yu Yang-Xin, Zheng Yuan-Xiang, Li Ji-Ding, Shift of the azeotropic point of binary Lennard-Jones mixtures confined in a slit-like pore, Fluid Phase Equilibria, 292: 110-116 (2010)
  5. Shintaro Fujimoto, Yu Yang-Xin, Effect of electrolyte concentration on DNA A-B conformational transition:An unrestrained molecular dynamics simulation study, Chinese Physics B, 19(8): 088701 (2010)
  6. Hu Jia-Wen, Yu Yang-Xin, High-order virial coefficients and equation of state for hard sphere and hard disk systems, Phys. Chem. Chem. Phys., 11: 9382-9390 (2009)
  7. Peng Bo, Yu Yang-Xin, Ion distributions, exclusion coefficients, and separation factors of electrolytes in a charged cylindrical nanopore: A partially perturbative density functional theory study, J. Chem. Phys., 131: 134703 (2009). Has been selected for the October 19, 2009 issue of Virtual Journal of Nanoscale Science & Technology and the October 15, 2009 issue of Virtual Journal of Biological Physics Research
  8. Yu Yang-Xin, A novel weighted density functional theory for adsorption, fluid-solid interfacial tension, and disjoining properties of simple liquid films on planar solid surfaces,  J. Chem. Phys. 131( 2): 024704 ( 2009)
  9. Hu Jia-Wen, Yu Yang-Xin,  Prediction and Refinement of High-Order Virial Coefficients for a Hard-Sphere System, Chinese Physics Letters,26(8): 086404 (2009)
  10. Qin Shan-Shan, Yu Zhi-Wu, Yu Yang-Xin, Structural Characterization on the Gel to Liquid-Crystal Phase Transition of Fully Hydrated DSPC and DSPE Bilayers, J. Phys. Chem. B, 113( 23): 8114-8123 (2009)
  11. Qin Shan-Shan, Yu Zhi-Wu, Yu Yang-Xin, Structural and kinetic properties of a-tocopherol in phospholipids bilayers, a molecular dynamics simulation study, J. Phys. Chem. B, 113(52): 16537-16546 (2009)
  12. Bo Peng, Yang-Xin Yu, A density functional theory with a mean-field weight function: Applications to surface tension, adsorption, and phase transition of a Lennerd-Jones fluid in a slit-like pore, J. Phys. Chem. B, 112 (2008) 15407-15416
  13. Bo Peng, Yang-Xin Yu, A density functional theory for Lennard-Jones fluids in cylindrical pores and its applications to adsorption of nitrogen on MCM-41 materials, Langmuir, 24 (2008) 12431-12439
  14. Ke Wang, Yang-Xin Yu, Guang-Hua Gao, Density functional study on the structural and thermodynamic properties of aqueous DNA-electrolyte solution in the frame work of cell model, J. Chem. Phys., 128 (2008) 185101
  15. Yang-Xin Yu, Jin Zhao, A. E. Bayly, Development of surfactants and builders in detergent formulations, Chinese J. Chem. Eng., 16 (2008) 517-527
  16. Yang-Xin Yu, Lin Jin, Thermodynamic and structural properties of mixed colloids represented by a hard-core two-Yukawa mixture model fluid: Monte Carlo simulation and an analytical theory, J. Chem. Phys., 128 (2008) 014901
  17. Ke Wang, Yang-Xin Yu, Guang-Hua Gao, Guang-Sheng Luo, Preferential interaction between DNA and small ions in mixed-size counterion systems: Monte Carlo simulation and density functional study, J. Chem. Phys., 126 (2007) 135102
  18. Yang-Xin Yu, Qiang Gong, Liang-Liang Huang, Measurement of activity coefficient at infinite dilution of hydrocarbons in sulfolane using gas-liquid chromatography, J. Chem. Eng. Data, 52(4): 1459-1463 (2007)
  19. Guang-Hua Gao, Hong-bing Shi, Yang-Xin Yu, Mutual dffusion coefficients of concentrated 1:1 electrolyte from the modified mean spherical approximation, Fluid Phase Equilibria, 256: 105-111 (2007) 
  20. Jie Zhu, Yao Wang, Wenjun Li, Fei Wei, Yang-Xin Yu, A density functional study of nitrogen adsorption in single-wall carbon nanotube,Nanotechnology, 18(9): 095707 (2007)