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Integrated analysis of energy, economic, and environmental performance of biomethanol from rice straw in China / Jun Xiao in Industrial & engineering chemistry research, Vol. 48 N° 22 (Novembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 22 (Novembre 2009) . - pp. 9999–10007 Titre : Integrated analysis of energy, economic, and environmental performance of biomethanol from rice straw in China Type de document : texte imprimé Auteurs : Jun Xiao, Auteur ; Laihong Shen, Auteur ; Yanan Zhang, Auteur Année de publication : 2010 Article en page(s) : pp. 9999–10007 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Rice  straw  process  Biomethanol  China Résumé : This paper focuses on a biomethanol from the rice straw process involving the thermodynamic, economic, and environmental performance in China. Based on the simulation of methanol synthesis via biomass gasification in interconnected fluidized beds using Aspen Plus software, the method of LCA (Life Cycle Assessment) is applied to evaluate the impact of pollutant emissions in the full life cycles of biomethanol. The integrated performance of biomethanol system is analyzed combining with energy utilization, economic cost, and environmental impact. The results show that the methanol yield can reach 0.308 kg/(kg rice straw), i.e., the energy efficiency of rice straw conversion to biomethanol is approximately 42.7%. For a biomethanol plant with an annual production of 50,000 tons, the real cost of biomethanol is evaluated at 2685 RMB/t, in which the economic cost is 2347 RMB/t, and the environmental cost is 337.6 RMB/t. Because of its high investment cost, presently the economic cost of biomethanol is higher than that of coal-based methanol in China. Nevertheless biomethanol will be becoming more competitive with the shortage of fossil fuel in the future. In the whole life cycle, the main pollutant emissions come from the biomethanol production process and biomethanol end-use by automobiles, whereas the net environmental effect is negative during the rice cultivation. Global warming is the most influential factor of the different impact categories. However, 1910 kg of CO2 can be fixed for one ton of methanol by photosynthesis in the growth of rice, thus the effect of global warming is significantly reduced by biomass utilization compared with coal-based methanol. The integrated performance indicates that producing methanol from rice straw is beneficial to both the utilization of agriculture waste and in the improvement of environment. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900680d [article] Integrated analysis of energy, economic, and environmental performance of biomethanol from rice straw in China [texte imprimé] / Jun Xiao, Auteur ; Laihong Shen, Auteur ; Yanan Zhang, Auteur . - 2010 . - pp. 9999–10007. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 22 (Novembre 2009) . - pp. 9999–10007 Mots-clés : Rice  straw  process  Biomethanol  China Résumé : This paper focuses on a biomethanol from the rice straw process involving the thermodynamic, economic, and environmental performance in China. Based on the simulation of methanol synthesis via biomass gasification in interconnected fluidized beds using Aspen Plus software, the method of LCA (Life Cycle Assessment) is applied to evaluate the impact of pollutant emissions in the full life cycles of biomethanol. The integrated performance of biomethanol system is analyzed combining with energy utilization, economic cost, and environmental impact. The results show that the methanol yield can reach 0.308 kg/(kg rice straw), i.e., the energy efficiency of rice straw conversion to biomethanol is approximately 42.7%. For a biomethanol plant with an annual production of 50,000 tons, the real cost of biomethanol is evaluated at 2685 RMB/t, in which the economic cost is 2347 RMB/t, and the environmental cost is 337.6 RMB/t. Because of its high investment cost, presently the economic cost of biomethanol is higher than that of coal-based methanol in China. Nevertheless biomethanol will be becoming more competitive with the shortage of fossil fuel in the future. In the whole life cycle, the main pollutant emissions come from the biomethanol production process and biomethanol end-use by automobiles, whereas the net environmental effect is negative during the rice cultivation. Global warming is the most influential factor of the different impact categories. However, 1910 kg of CO2 can be fixed for one ton of methanol by photosynthesis in the growth of rice, thus the effect of global warming is significantly reduced by biomass utilization compared with coal-based methanol. The integrated performance indicates that producing methanol from rice straw is beneficial to both the utilization of agriculture waste and in the improvement of environment. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900680d

Simulation of methanol production from biomass gasification in interconnected fluidized beds / Yanan Zhang in Industrial & engineering chemistry research, Vol. 48 N° 11 (Juin 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 11 (Juin 2009) . - pp. 5351–5359 Titre : Simulation of methanol production from biomass gasification in interconnected fluidized beds Type de document : texte imprimé Auteurs : Yanan Zhang, Auteur ; Jun Xiao, Auteur ; Laihong Shen, Auteur Année de publication : 2009 Article en page(s) : pp. 5351–5359 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Methanol  synthesis  Biomass  gasification  Fluidized  beds  CaCO3  catalysis Résumé : Simulation of methanol synthesis via H2-rich biomass-derived syngas from biomass gasification in interconnected fluidized beds is carried out, using Aspen Plus software to establish this model. In the case of CaCO3 catalysis, the effects of operating parameters, including gasification temperature and pressure, steam /biomass ratio (S/B), and liquefaction temperature and pressure, on the methanol yield are analyzed. The results are as follows: In the case of CaCO3 catalysis, biomass steam gasification can obtain 82.13% hydrogen-rich gas and when the Cu-based catalyst in China which is composed of 58.1% CuO + 30.06% Al2O3 + 31.7% ZnO + 4.0% H2O is adopted as the methanol synthesis catalyst; the gasification temperature is suggested to be controlled at about 750 °C in the interconnected fluidized beds biomass gasification system with the purpose of methanol production. Furthermore, the gasification pressure is proposed to approach to the ambient pressure and the S/B ratio of 0.4−0.5 operates better. On the optimal operating condition, the maximum of 12.19 mol/(kg biomass (daf)) of methanol yield may be obtained. The research provides useful results for the further study of biomass gasification and methanol synthesis from biomass syngas. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801983z [article] Simulation of methanol production from biomass gasification in interconnected fluidized beds [texte imprimé] / Yanan Zhang, Auteur ; Jun Xiao, Auteur ; Laihong Shen, Auteur . - 2009 . - pp. 5351–5359. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 11 (Juin 2009) . - pp. 5351–5359 Mots-clés : Methanol  synthesis  Biomass  gasification  Fluidized  beds  CaCO3  catalysis Résumé : Simulation of methanol synthesis via H2-rich biomass-derived syngas from biomass gasification in interconnected fluidized beds is carried out, using Aspen Plus software to establish this model. In the case of CaCO3 catalysis, the effects of operating parameters, including gasification temperature and pressure, steam /biomass ratio (S/B), and liquefaction temperature and pressure, on the methanol yield are analyzed. The results are as follows: In the case of CaCO3 catalysis, biomass steam gasification can obtain 82.13% hydrogen-rich gas and when the Cu-based catalyst in China which is composed of 58.1% CuO + 30.06% Al2O3 + 31.7% ZnO + 4.0% H2O is adopted as the methanol synthesis catalyst; the gasification temperature is suggested to be controlled at about 750 °C in the interconnected fluidized beds biomass gasification system with the purpose of methanol production. Furthermore, the gasification pressure is proposed to approach to the ambient pressure and the S/B ratio of 0.4−0.5 operates better. On the optimal operating condition, the maximum of 12.19 mol/(kg biomass (daf)) of methanol yield may be obtained. The research provides useful results for the further study of biomass gasification and methanol synthesis from biomass syngas. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801983z