Cellulose hydrolysis in dilute mineral acids was investigated, and a plateau in cellulose conversion was observed such that an extended reaction time did not result in further conversion of cellulose, which severely reduced the hydrolysis efficiency of cellulose. The characterization results indicated that the crystallinity indexes of cellulose and the deposition of humins were not the key factors inhibiting the reaction but rather the solation of cellulose in the presence of water, protons, and anions was the key. The hydrolysis reaction proceeded after the solated state of cellulose was disrupted by means of filtration, increased temperature, or the addition of organic solvents and inorganic salts. However, a new plateau in cellulose conversion eventually formed and inhibited the hydrolysis reaction again. Therefore, continuous disruption of the solated system of cellulose is the key strategy to achieve high cellulose conversion under even mild reaction conditions.

中文翻译：

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洞察纤维素对酸性水解的抑制作用

研究了在稀无机酸中的纤维素水解，并且观察到纤维素转化率处于稳定状态，使得延长的反应时间不会导致纤维素的进一步转化，这严重降低了纤维素的水解效率。表征结果表明，纤维素的结晶度和腐殖质的沉积不是抑制反应的关键因素，而是在水，质子和阴离子存在下纤维素的质构关系是关键。在通过过滤，升高的温度或添加有机溶剂和无机盐破坏纤维素的固态状态之后，进行水解反应。然而，纤维素转化的新平台最终形成并再次抑制了水解反应。所以，