Laboratório de Processos de Separação e Reação - Laboratório de Catálise e Materiais (LSRE-LCM), Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
Laboratório de Processos de Separação e Reação - Laboratório de Catálise e Materiais (LSRE-LCM), Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
Bioresour Technol. 2017 Nov;244(Pt 1):1173-1177. doi: 10.1016/j.biortech.2017.08.015. Epub 2017 Aug 7.
Sorbitol and xylitol yields can be improved by converting cellulose and xylan simultaneously, due to a synergetic effect between both substrates. Furthermore, both yields can be greatly enhanced by simply adjusting the reaction conditions regarding the optimum for the production of each product, since xylitol (from xylan) and sorbitol (from cellulose) yields are maximized when the reaction is carried out at 170 and 205°C, respectively. Therefore, the combination of a simultaneous conversion of cellulose and xylan with a two-step temperature approach, which consists in the variation of the reaction temperature from 170 to 205°C after 2h, showed to be a good strategy for maximizing the production of sorbitol and xylitol directly from mixture of cellulose and xylan. Using this new and environmentally friendly approach, yields of sorbitol and xylitol of 75 and 77%, respectively, were obtained after 6h of reaction.
山梨醇和木糖醇的得率可以通过同时转化纤维素和木聚糖来提高，因为这两种底物之间存在协同作用。此外，通过简单地调整反应条件，使其最适合每种产物的生产，就可以大大提高这两种产物的得率，因为当反应分别在 170°C 和 205°C 下进行时，木糖醇（来自木聚糖）和山梨醇（来自纤维素）的得率达到最大值。因此，将纤维素和木聚糖的同时转化与两步温度法相结合，即在 2 小时后将反应温度从 170°C 变化到 205°C，是一种从纤维素和木聚糖混合物中直接最大化生产山梨醇和木糖醇的有效策略。使用这种新的环保方法，反应 6 小时后，山梨醇和木糖醇的得率分别达到 75%和 77%。
