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      2. 生物質催化制備5-乙氧基甲基糠醛研究進展
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        國家自然科學基金聯合基金項目 (U1904122)


        Progress in the preparation of 5-ethoxymethylfurfural by biomass alcoholysis
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          摘要:

          生物質醇解是生物質高值化利用的一種方式,可以轉化制備得到與汽油和柴油燃燒特性相近的液體燃料5-乙氧基甲基糠醛(5-ethoxymethylfurfural,EMF)。本文對生物質醇解轉化制備EMF的原料、催化體系和溶劑體系進行了文獻綜述,總結了糖類、木質纖維素類不同原料制備液體燃料的現狀和趨勢;綜述和分析了均相和非均相催化體系在生物質醇解制備EMF中的優劣;探討了EMF制備過程中溶劑體系的作用和效果,對生物質醇解制備EMF的研究趨勢進行了展望。

          Abstract:

          Biomass alcoholysis is a way of high-value utilization of biomass,which can be directly converted into 5-ethoxymethylfurfural (EMF) known as a liquid fuel and fuel additives with similar combustion characteristics and energy density to gasoline and diesel.The high octane number,high boiling point and stable flash point of EMF make it a suitable transportation fuel.In this paper,the feedstock,catalytic system and solvent system for the preparation of liquid fuel by biomass alcoholysis was reviewed.The current situation and developing trend of the preparation of liquid fuels from different materials including lignocellulosic materials,fructose and glucose were summarized.The homogeneous,heterogeneous and ionic liquid catalytic systems in the process of EMF preparation from biomass were reviewed and analyzed.The advantages and disadvantages of different catalytic systems were compared.Traditional homogeneous catalysts have the advantages of easy availability and low cost with a moderate yields of EMF in general,but the recycle of the homogeneous catalysts and the corrosion of equipment are still far from satisfactory.Among them,ionic liquids have attracted wide attention due to their low toxicity,high polarity,adjustable acidity,easy separation and recovery,and high catalytic efficiency,but the cost is too high for large-scale industrial production,which is the main drawback to be solved.Heterogeneous catalysts can reduce equipment corrosion and make it much easier for the separation and recovery after the reaction.Most of the heterogeneous catalysts have the advantage of adjustable acidity,high mechanical strength,high thermal stability and high chemical stability.Heterogeneous catalysts are therefore considered to be promising.The function and effect of solvent system in the process of biomass alcoholysis were discussed.Ethanol is the most widely used solvent system in the EMF production,for it is also the necessary reactant in the alcoholysis reaction.Organic solvents including DMSO(dimethyl sulfoxide),THF(tetrahydrofuran),GVL(γ-valerolactone) and n-hexane are used together with ethanol as a solvent system to form a co-solvent system.The co-solvent can increase the yield of EMF and reduce the formation of by-products,but there are still some problems to be solved,such as difficult separation of products from solvents,high cost,low recovery rate,environmental pollution and so on.The studying trend of biomass alcoholysis to prepare EMF is prospected.

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        徐桂轉,鄭張斌,王世杰,王晨,張少浩.生物質催化制備5-乙氧基甲基糠醛研究進展[J].華中農業大學學報,2020,39(5):176-184

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        • 收稿日期:2019-12-20
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        • 在線發布日期: 2020-10-05
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