FULL UTILIZATION OF BIOMASS WITH A NOVEL DISSOLUTION PROCESS PLATFORM: A PATHWAY TO A SUSTAINABLE AND ECONOMIC BIOENERGY
Increasing concerns about global warming and diminishing fossil fuel reserves have stimulated much effort to use renewable resource as an alternative to petroleum for the production of fuels and chemicals. Lignocellulosic biomass is of particular interest because lignocellulosic materials primarily consist of a complex mixture of lignin, hemicellulose and cellulose. Their facile fractionation and activation of these components is regarded as the entry point challenge towards a sustainable and economic development of bio-economy. 1 Recently, we have firstly reported a novel N-Methylpyrrolidone (NMP)/1ethyl-3-methyl imidazolium acetate (EmimAc) mixed solvent (XiLs=0.2, mole fraction of ionic liquids (ILs) in the mixed solution) that can dissolve up to 10 wt％ corn stover at 100 °C in 60 min. With an addition of an anti-solvent, large than 95％ cellulose and hemicellulose can be precipitated and accumulated, and they are very active for subsequent saccharification and a full conversion achieved in 24 h with a 82.9％ total reducing sugars yield and a 60.8％ glucose yield. The hydrolysates can be used for further bioconversion into microbial lipids and on inhibitory effect was observed. Element analysis shows that 60％ of lignin was removed during this dissolution and regeneration process, and the fractioned lignin can be regenerated by addition of water in the ionic liquids after removing the NMP. This new ionic liquids-lignin (ILL) was active and clean carbon resource for further conversion and utilization.23 For example, it was found that the cooperated catalytic system of ILL-KI is active for the activation of CO2and epoxides to synthesize cyclocarbonates, which presents a new and green catalytic system for the chemical fixation of CO2 into valuable chemicals.4 In word, our recent study shown a full utilization of biomass based on our newly developed new dissolution and processing system, and the discovery of potential value of main components in biomass (Fig. 1) will lead to a pathway to a sustainable and economy development of bioenergy.
full utilization of biomass bioenergy ionic liquids fractionation biodiesel
Haibo Xie Hongwei Shen Zhilian Wu Zhiwei Gong Qian Wang Zongbao Kent Zhao
Dalian Institute of Chemical Physics, CAS Dalian National Laboratory for Clean Energy 457 Zhongshan Dalian Institute of Chemical Physics, CAS
国际会议
大连
英文
44-45
2012-05-28（万方平台首次上网日期，不代表论文的发表时间）