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固体酸催化剂水解微晶纤维素制备葡萄糖
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摘要
生物质能源是一种绿色清洁的可再生能源,随着煤、石油、天然气等化石能源的日渐枯竭和环境污染问题的日趋严重,生物质能源的高效开发利用变得越来越重要。纤维素是生物质的主要组成部分,它有可能作为一种可持续的原料生产许多化学品。将纤维素水解制备葡萄糖是纤维素利用的重要途径。文献报道中纤维素水解反应最传统的催化剂是液体酸催化剂,与传统的液体酸相比,固体酸催化剂具有容易处理和储存,对设备无腐蚀作用,稳定性好等优点。本文以离子液体[Emim]Cl为溶剂,以复合分子筛为催化剂,在油浴加热条件下进行水解反应制备葡萄糖。采用DNS法进行总还原糖(TRS)测定,同时通过高效液相色谱(HPLC)对水解产物进行定量分析。考察了催化剂用量、反应时间、反应温度、反应时间、加水量等条件对水解反应的影响,优化了反应条件,得到了较好的葡萄糖收率。
Biomass energy is a green, clean and renewable energy. With the global depletion of fossil resources and deterioration of environment, efficient utilization of biomass energy has become increasingly important. Cellulose is the major component of biomass, and it has the potential to serve as a sustainable feedstock for the production of many chemicals. The hydrolysis of cellulose into glucose is an important path for the cellulose utilization. The most traditional catalysts for the hydrolysis of cellulose in the literature are liquid acid catalysts. Compared with the traditional liquid acid, the solid acid catalyst has the advantages of easy processing and storage, no corrosion to the equipment, good stability and so on. In this paper, the composite zeolite was applied as catalyst to promote hydrolysis of cellulose in [Emim]Cl with oil bath heating. DNS method is used for TRS determination. The products were analyzed by HPLC. The effects of catalyst and water amount, reaction time, reaction temperature and time on the hydrolysis reaction were investigated and high glucose yield was obtained.
引文
[1]Cai,H.;Li,C.;Wang,A.;Xu,G.;Zhang,T.Applied Catalysis B Environmental.2012,123(12):333–338
    [2]Earle M.J.;Seddon K.R..Pure and Applied Chemistry.2000,72,1391–1398

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