Aihara Takeshi, Asazuma Katsuya, Miura Hiroki, Shishido Tetsuya
Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University 1-1 Minami-Osawa Hachioji Tokyo 192-0397 Japan.
Research Center for Hydrogen Energy-based Society, Tokyo Metropolitan University 1-1 Minami-Osawa Hachioji Tokyo 192-0397 Japan.
RSC Adv. 2020 Oct 12;10(61):37538-37544. doi: 10.1039/d0ra08340b. eCollection 2020 Oct 7.
Gas-phase glycerol dehydration over WO/AlO catalysts was investigated. WO loading on γ-AlO significantly affected the yield of acrolein and the catalyst with 20 wt% WO loading showed the highest activity. The WO/AlO catalyst with 20 wt% WO loading showed higher activity and durability than the other supported WO catalysts and zeolites. The number of Brønsted acid sites and mesopores of the WO/AlO catalyst did not decrease after the reaction, suggesting that glycerol has continuous access to Brønsted acid sites inside the mesopores of WO/AlO, thereby sustaining a high rate of formation of acrolein. Dehydration under O flow further increased the durability of the WO/AlO catalyst, enabling the sustainable formation of acrolein. In addition, the WO/AlO catalyst with 20 wt% WO loading showed high activity for the dehydration of various polyols to afford the corresponding products in high yield.
研究了在WO/AlO催化剂上进行的气相甘油脱水反应。γ-AlO上WO的负载量对丙烯醛的产率有显著影响，WO负载量为20 wt%的催化剂表现出最高的活性。负载量为20 wt%的WO/AlO催化剂比其他负载型WO催化剂和沸石具有更高的活性和耐久性。反应后，WO/AlO催化剂的布朗斯台德酸位数量和中孔数量没有减少，这表明甘油能够持续接触到WO/AlO中孔内的布朗斯台德酸位，从而维持较高的丙烯醛生成速率。在O气流下脱水进一步提高了WO/AlO催化剂的耐久性，能够持续生成丙烯醛。此外，负载量为20 wt%的WO/AlO催化剂对各种多元醇的脱水反应具有高活性，能够以高收率得到相应产物。
