Journal of University of Chinese Academy of Sciences >
Synthesis of DME via Reforming Biomass Fuel Gas with Biogas
Received date: 2004-06-09
Revised date: 2004-10-15
Online published: 2005-07-15
In the present work, the biogas produced by anaerobic digestion of biomass was used to reform biomass air steam gasification fuel gas over the ultra-stable NiOMgO catalyst for generation of synthesis gas CO). Different adjustment pathways for meeting the desired stoichiometry of the synthesis gas for the DME synthesis were compared and analyzed. The promoting effect of reforming reaction on the biomass syngas production was investigated. The activity and stability of reforming catalyst were also tested and valued. The desired stoichiometric syngas was obtained by coreforming with biogas and biomass fuel gas. The x (H2)Px (CO) (syngas) is above 115. It contains trace CH and CO. The feeding rate of biogas depends on the composition and flow velocity of fuel gas produced in the gasifier. Above 70 %of the biomass carbon content was converted to DME. The selectivity of DME in the synthesis products was increased to 69.6 %. Compared with commercial nickelbased reforming catalysts, the MgO catalyst exhibits good catalytic activity, reducibility and anticoke ability at high temperature (> 750 ℃). The lifetime test for 100h indicates no coke formation on the surface of catalyst. It also exhibits no structure destroying after lifetime test. Compared with conventional stoichiometric factor adjustment pathways, the technology of co-reforming with addition of biogas was simple and highly effective. The composition of syngas by this technology is suitable for DME production.
Key words： biomass; reforming; dimethyl ether (DME)
WANG Tie-Jun , CHANG Jie . Synthesis of DME via Reforming Biomass Fuel Gas with Biogas[J]. Journal of University of Chinese Academy of Sciences, 2005 , 22(4) : 422 -428 . DOI: 10.7523/j.issn.2095-6134.2005.4.005
[1] Su XY, Wang ZW, Cheng CM, et al. Study on biomass pyrolysis and gasification in a fluidized bed. Journal of Fuel Chemistry and Technology,2000, 28 (4) :298～305 (in Chinese with English abstract)
[2] Turn S, Kinoshita C, Zhang Z, et al. An experimental investigation of hydrogen production from biomass gasification. Int. J. Hydrogen Energy,1998,23 (8) :641～648
[3] Rapagna S, Jand N, Foscolo PU. Catalytic gasification of biomass to produce hydrogen rich gas. Int. J. Hydrogen Energy, 1998,23 (7) :551～557
[4] Guo JW, Song XY, Cui YD. Catalytic pyrogasification of biomass in a fluidized2bed reactor. Journal of Fuel Chemistry and Technology,2001, 29(4) :319～322 (in Chinese with English abstract)
[5] Xie KC, Li Z. Methanol and its Ramification. Beijing : Chemistry Industry Publishing Company, 2002 (in Chinese)
[6] Ng KL, Chadwick D. Kinetics and modeling of dimethyl ether synthesis from synthesis gas. Chemical Engineering Science, 1999,54 :3587～3592
[7] Hou B, LüZA, Li XH, et al. Catalytic cracking of tar derived from biomass pyrolysis. Journal of Fuel Chemistry and Technology,2001, 29 (1) :70～75 (in Chinese with English abstract)
[8] Wang ZW, Tang ST, Su XY, et al. A study on model for biomass pyrolysis and gasification in fluidized bed. Journal of Fuel Chemistry and Technology, 2002, 30 (4) :342～346 (in Chinese with English abstract)
[9] Guo JW, Niu YQ, Zhang BJ, et al. Study of catalytic performance of dual catalyst in LPDME process from syngas. Journal of Fuel Chemistry and Technology, 1998, 26 (4) :321～325 (in Chinese with English abstract)
[10] Wurzel T, Malcus S. Reaction engineering investigations of CO2 reforming in a fluidized2bed reactor. Chemical Engineering Science,2000,55 :3955～3966.
[11] Michiel JAT, AndréPC. Exploration of the possibilities for production of Fischer Tropach Liquids and power via biomass gasification. Biomass & Bioenergy, 2002, 23 :129～152
/
| 〈 |
|
〉 |