Hydrolysis of Cellulose in the Presence of Catalysts Based on Cesium Salts of Heteropoly Acids
Nikolay V. Gromov, Тatiana B. Medvedeva, Оxana P. Тaran, M. N. Timofeeva, Valentin N. Parmon
Abstract
The paper presents the results of studies of catalytic properties of cesium salts of heteropoly acids Cs4–хHхSiW12O40 (x = 3 and 3.5), Cs3–хHхPMo12O40 and Cs3–хHхPW12O40 (x = 2 and 2.5) for hydrolysis of cellulose to glucose at 180°C under argon atmosphere. Glucose is shown to be the main reaction product. The maximum hourly yield equal to 23% is observed in the presence of Cs3HSiW12O40. It is assumed that the catalyst efficiency is affected by the specific surface area. It is established that both heterogeneous and homogeneous processes occur in the presence of the salts due to leaching of the active component to the solution. The prepared salts are demonstrated to be more efficient than systems reported previously in literature.