Kinetic study of cellulose hydrolysis with tungsten-based acid catalysts
Kinetic study of cellulose hydrolysis with tungsten-based acid catalysts
复制标题
钨基酸催化剂纤维素水解动力学研究
DOI：
10.1002/aic.16585
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发表时间：
2019
期刊：
影响因子：
3.7
通讯作者：
Wang Aiqin
中科院分区：
文献类型：
--
作者：
Li Zhenlei;Zhang Junying;Hou Baolin;Wang Aiqin
钨在纤维素转化为C2 - C3多元醇的过程中起着重要作用。在以往的报道中，研究重点主要集中在各种含钨催化剂催化纤维素的C - _ - C裂解反应上，而较少关注其在纤维素水解中的催化作用，尽管它通常被认为是纤维素转化过程中决定速率的步骤。本文研究了纤维素水解成葡萄糖动力学参数的测定方法。定量研究了反应温度、不同钨基酸催化剂和H+浓度对纤维素水解成葡萄糖反应速率的影响。在研制的间歇式连续搅拌槽式反应器中，得到了H3O40PW12、H4O40SiW12和H2WO4as钨酸催化剂的反应速率方程，并通过实验数据进行了验证。模拟分析表明，纤维素水解的反应机理会随着温度的变化而变化。h3o40pw12是获得最大葡萄糖浓度的最佳候选催化剂。
Tungsten plays an important role in transforming cellulose to C2C3 polyols. In previous reports, the research focus was mainly on the CC cleavage reactions of cellulose catalyzed by various tungsten‐containing catalysts, but less on its catalytic role in cellulose hydrolysis although it is usually considered as the rate‐determining step in cellulose conversion. In this article, the method of determining kinetics parameters for hydrolyzing cellulose into glucose was developed. The effects of reaction temperature, different tungsten‐based acid catalysts, and H+concentration on reaction rate of hydrolyzing cellulose into glucose were quantitatively addressed. The relevant reaction rate equations with using H3O40PW12, H4O40SiW12, and H2WO4as tungsten acid catalysts were obtained in developed batch continuous stirred tank reactors and validated by experimental data. The simulating analysis indicates that the reaction mechanism of cellulose hydrolysis can change with the temperature. H3O40PW12is the best candidate catalyst for obtaining the maximum glucose concentration.