Articles & Issues

Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received October 16, 2010
Accepted January 20, 2011

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

All issues

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

Chengyuan Cheng Haitao Zhang Weiyong Ying^† Dingye Fang

State Key Laboratory of Chemical Engineering, Engineering Research Center of Large Scale Reactor Engineering and Technology, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China

Korean Journal of Chemical Engineering, July 2011, 28(7), 1511-1517(7), 10.1007/s11814-011-0018-4

Download PDF

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 ℃ temperature, 3-7MPa pressure, and 1,000-2,500 mL/g·h space velocity. The H2/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/Al2O3 and γ-alumina, which act as methanol synthesis_x000D_ catalyst and dehydration catalyst, respectively. The three reactions, including methanol synthesis from CO and CO2 as 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_x000D_ process conditions on the reactor performance were also investigated.

Keywords

Kinetics Dimethyl Ether Syngas One-step Fixed-bed

References

Semelsberger TA, Borup RL, Greene HL, J. Power Sources., 156, 497 (2005)
Arcoumanis C, Bae C, Crookes R, Fuel., 87, 1014 (2008)
Brown DM, Bhatt BL, Hsiung TH, Lewnard JJ, Waller FJ, Catal. Today., 8, 279 (1991)
Xia JC, Mao DS, Zhang B, Chen QL, Tang Y, Catal. Lett., 98(4), 235 (2004)
Lu WZ, Teng LH, Xiao WD, Natural Gas Chem. Ind. (China)., 27, 53 (2002)
Liu DH, Xu J, Zhang HT, Fang DY, J. Chem. Ind. Eng. (China)., 53, 103 (2002)
Froment GF, Bischoff KB, Chemical reactor analysis and design, Wiley, New York (1990)
Ng KL, Chadwick D, Toseland BA, Chem. Eng. Sci., 54(15-16), 3587 (1999)
Bercic G, Levec J, Ind. Eng. Chem. Res., 31, 399 (1992)
Vandenbussche KM, Froment GF, J. Catal., 161(1), 1 (1996)
Graaf GH, Stamhuis EJ, Beenackers AACM, Chem. Eng. Sci., 43, 3185 (1988)
Moradi GR, Ahmadpour J, Yaripour F, Chem. Eng. J., 144(1), 88 (2008)
Lee JS, Lee KH, Lee SY, Kim YG, J. Catal., 144(2), 414 (1993)
Song WD, Zhu BC, Wang HS, J. Chem. Ind. Eng. (China)., 38, 401 (1988)
Nie ZG, Liu HW, Liu DH, Ying WY, Fang DY, J. Nat. Gas. Chem., 14, 22 (2005)
Zhang HT, Cao FH, Liu DH, Fang DY, Journal of East China University of Science and Technology., 27, 198 (2001)
Hamming RW, Numerical methods for scientists and engineers., Dover, New York (1983)
Roweis S, Levenberg-Marquardt Optimization University of Toronto (1996)