Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (08): 1926-1932.doi: 10.3866/PKU.WHXB20110810

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Dimethyl Ether Production from Biomass Char and CO2-Rich Bio-Syngas

XU Yong, YAN Shi-Zhi, YE Tong-Qi, ZHANG Zhao, LI Quan-Xin   

  1. Department of Chemical Physics, Anhui Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, Hefei 230026, P. R. China
  • Received:2011-04-25 Revised:2011-05-31 Published:2011-07-19
  • Contact: LI Quan-Xin E-mail:liqx@ustc.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (50772107), National Key Basic Research Program of China (973) (2007CB210206), and National High-Tech Research and Development Program of China (863) (2009AA05Z435).

Abstract:

We report on a novel approach toward dimethyl ether (DME) synthesis using crude CO2-rich bio-syngas and biomass char. The crude bio-syngas was derived from bio-oil reforming and was initially conditioned by catalytic conversion into CO-rich bio-syngas using biomass char over the Ni/Al2O3 catalyst. The molar ratio of CO2 to CO significantly decreased from 6.33 in the CO2-rich bio-syngas to 0.21 after bio-syngas conditioning at 800 °C. The yield of dimethyl ether from the conditioned bio-syngas was about four times higher than that from the CO2-rich bio-syngas over the Cu-ZnO-Al2O3/HZSM-5 catalyst. This work potentially provides a useful approach toward producing biofuels and chemicals from bio-syngas and a novel utilization of biomass char.

Key words: Biomass char, Dimethyl ether, Bio-syngas conditioning, NiO-Al2O3 catalyst, Cu-ZnO-Al2O3/HZSM-5 catalyst

MSC2000: 

  • O643