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Kinetics of furfural destruction in a formic acid medium

机译：甲酸介质中糠醛破坏的动力学

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摘要

Furfural is one of the key chemicals produced from hemicellulose pentosans in acidic conditions. In the same conditions, furfural also undergoes degradation reactions leading to yield loss. In this study, the kinetics of furfural degradation in a formic acid medium containing 2 to 30% (w/w) formic acid and 0.05 to 0.16 mol L-1 furfural was studied in small batch reactors. The reaction temperatures were 160, 180, and 200 degrees C. The results showed that the overall order of the reaction changes with the amount of formic acid catalyst: in high acid concentration (30%) the apparent order of reaction is over one and in low acid concentration (2%) the order of reaction is below one. The proposed kinetic model, which includes an uncatalysed and an acid-catalysed term, is capable of estimating this behaviour. The model and findings presented in this study can support the optimisation of furfural production conditions.
机译：糠醛是在酸性条件下由半纤维素戊聚糖生产的关键化学品之一。在相同条件下，糠醛也会发生降解反应，导致产量下降。在这项研究中，在小批量反应器中研究了含有2至30％（w / w）甲酸和0.05至0.16 mol L-1糠醛的甲酸介质中糠醛降解的动力学。反应温度分别为160、180和200摄氏度。结果表明，反应的整体顺序随甲酸催化剂的量而变化：在高酸浓度（30％）下，表观反应顺序超过1，而在高酸浓度下，表观反应顺序超过1。低酸浓度（2％）时，反应顺序低于1。所提出的动力学模型（包括一个未催化的和一个酸催化的术语）能够估计这种行为。本研究中提出的模型和发现可以支持糠醛生产条件的优化。

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