一种对生物质乙醇化反应动力建模的等级替代方法
Ailís O'Shea1, Conall McNamara1, Prajwal Rao1
1School of Physics, Trinity College Dublin Ireland aoshea2@tcd.ie.
概括
碳水化合物如葡萄糖和玉米的硫酸催化乙醇化产生乙烯基氨酸,一种潜在的生物燃料. 模拟了反应动力学,揭示了果糖的产量比葡萄糖更快的乙烯氨酸,确定了最大产量的最佳条件.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 可再生能源可再生能源是可再生能源.
- 催化剂是一种催化剂.
背景情况:
- 将生物质转化为有价值的化学品和燃料对于可持续能源至关重要.
- 碳水化合物的乙醇化提供了一条生产生物燃料和化学中间体的途径.
- 了解反应机制和动力学对于过程优化至关重要.
研究的目的:
- 研究硫酸催化葡萄糖,纤维素,西兰和玉米的乙醇化反应机制和动力学.
- 为玉米乙醇化开发一个层次化的代用动力模型.
- 评估产品混合物的潜力,作为一个下降生物燃料.
主要方法:
- 在150-200°C以硫酸催化剂在乙醇中的碳水化合物乙醇解的实验研究.
- 使用实验数据进行实证反应机制建模.
- 葡萄糖和果糖乙醇溶解的比较机制研究.
- 为玉米开发一个层次替代运动模型.
主要成果:
- 乙醇溶解产生乙烯基酸盐和乙烯基;果糖的转化速度更快,产生更多的乙烯基酸盐比葡萄糖.
- 乙基氨酸的最大产量在7.9% (xylan) 到39.3% (葡萄糖) 之间,达到温度独立的稳定状态.
- 玉米:酸性质量比为10:1,足以获得最大的乙烯基氨酸产量;玉米的动力模型实现了R2=0.88.8.
结论:
- 乙基氨酸,乙烯和乙醇的产品混合物显示出作为量身定制的滴入生物燃料的潜力.
- 果糖是一种比葡萄糖更有效的基质,用于通过乙醇溶解生产乙烯基酸盐.
- 开发的动力模型是优化生物质转化过程的宝贵工具.
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