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The main factors affecting the catalytic properties of Ru/Cs-HPA systems in one-pot hydrolysis-hydrogenation of cellulose to sorbitol
Applied Catalysis A: General ( IF 4.7 ) Pub Date : 2020-02-28 , DOI: 10.1016/j.apcata.2020.117489
Nikolay V. Gromov , Tatiana B. Medvedeva , Oxana P. Taran , Maria N. Timofeeva , Olivier Said-Aizpuru , Valentina N. Panchenko , Evgeniy Yu. Gerasimov , Ivan V. Kozhevnikov , Valentin N. Parmon

One-pot conversion of mechanically activated cellulose to sorbitol was investigated over bifunctional catalysts based on Ru (0.6, 1 and 3 wt.%) and cesium salts of heteropoly acids (HPA) Cs2.1H0.9PW12O40 and Cs3HSiW12O40 (Cs-PW and Cs-SiW, respectively). The maximal yield of sorbitol equal to 59% and selectivity 94% were achieved over the 1%Ru/Cs3HSiW12O40 catalyst. Physicochemical and catalytic data showed that the rate-determining step, i.e. the hydrolysis of cellulose, depended on the surface acidity of catalysts, whereas Ru content in catalyst affected both the hydrolysis and the hydrogenation steps. The kinetic parameters for one-pot conversion of cellulose were determined by mathematical modeling approach and were successfully used for the prediction of the yields of sorbitol and mannitol.



中文翻译:

影响Ru / Cs-HPA体系催化一锅水解加氢制山梨醇的催化性能的主要因素

在基于Ru(0.6、1和3 wt。%)和杂多酸(HPA)铯盐Cs 2.1 H 0.9 PW 12 O 40和Cs 3 HSiW 12的双功能催化剂上研究了机械活化纤维素向山梨糖醇的一锅转化。O 40(分别为Cs-PW和Cs-SiW)。在1%Ru / Cs 3 HSiW 12 O 40上,山梨糖醇的最大产率等于59%,选择性达到94%催化剂。物理化学和催化数据表明,决定速率的步骤(即纤维素的水解)取决于催化剂的表面酸度,而催化剂中的Ru含量影响水解和氢化步骤。通过数学建模方法确定了纤维素一锅转化的动力学参数,并成功地用于预测山梨醇和甘露醇的收率。

更新日期:2020-03-02
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