Intrinsic kinetics of one-step dimethyl ether synthesis from hydrogen-rich synthesis gas over bi-functional catalyst

다국어 초록 (Multilingual Abstract)

The reaction kinetics of the dimethyl ether synthesis from hydrogen-rich synthesis gas over bi-functional catalyst was investigated using an isothermal integral reactor at 220-260 oC temperature, 3-7MPa pressure, and 1,000-2,500 mL/g·h space velocity. The H_2/CO ratio of the synthetic gas was chosen between 3 : 1 and 6 : 1. The bi-functional catalyst was prepared by physically mixing commercial CuO/ZnO/Al_2O_3 and γ-alumina, which act as methanol synthesis catalyst and dehydration catalyst, respectively. The three reactions, including methanol synthesis from CO and CO_2as well as methanol dehydration, were chosen as independent reactions. The Langmuir-Hinshelwood kinetic models for dimethyl ether synthesis were adopted. Kinetics parameters were obtained using the Levenberg-Marquardt mathematical method. The model was reliable according to statistical and residual error analyses. The effects of different process conditions on the reactor performance were also investigated.

참고문헌 (Reference)

1 T. A. Semelsberger, 156 : 497-, 2005

2 C. Arcoumanis, 87 : 1014-, 2008

3 H. T. Zhang, 27 : 198-, 2001

4 Z.G. Nie, 14 : 22-, 2005

5 D. M. Brown, 8 : 279-, 1991

6 J.C. Xia, 98 : 235-, 2004

7 W. Z. Lu, 27 : 53-, 2002

8 D. H. Liu, 53 : 103-, 2002

9 K. L. Ng, 54 : 3587-, 1999

10 G. Bercic, 31 : 399-, 1992

11 K. M. Vanden Bussche, 161 : 1-, 1996

12 G.H. Graaf, 43 : 3185-, 1988

13 G. R. Moradi, 144 : 88-, 2008

14 J. S. Lee, 144 : 414-, 1993

15 W. D. Song, 38 : 401-, 1988

16 R.W. Hamming, "Numerical methods for scientists and engineers" Dover 1983

17 S. Roweis, "Levenberg-Marquardt Optimization University of Toronto" 1996

18 G. F. Froment, "Chemical reactor analysis and design" Wiley 1990