Bounoukta Charf Eddine, Megías-Sayago Cristina, Navarro Juan Carlos, Ammari Fatima, Ivanova Svetlana, Centeno Miguel Ángel, Odriozola Jose Antonio
Departamento de Química Inorgánica e Instituto de Ciencia de Materiales de Sevilla, Centro Mixto CSIC-Universidad de Sevilla, 41092 Sevilla, Spain.
Laboratoire de Génie des Procédés Chimiques-LGPC, Département de Génie des Procéés, Faculté de Technologie, Université FERHAT ABBAS SETIF-1, Setif 19000, Algeria.
Nanomaterials (Basel). 2023 Mar 22;13(6):1129. doi: 10.3390/nano13061129.
Cotton stalks-based biochars were prepared and used to synthetize Ru-supported catalysts for selective production of γ-valerolactone from levulinic acid in aqueous media. Different biochars' pre-treatments (HNO, ZnCl, CO or a combination of them) were carried out to activate the final carbonaceous support. Nitric acid treatment resulted in microporous biochars with high surface area, whereas the chemical activation with ZnCl substantially increases the mesoporous surface. The combination of both treatments led to a support with exceptional textural properties allowing the preparation of Ru/C catalyst with 1422 m/g surface area, 1210 m/g of it being a mesoporous surface. The impact of the biochars' pre-treatments on the catalytic performance of Ru-based catalysts is fully discussed.
制备了基于棉秆的生物炭，并将其用于合成负载钌的催化剂，以在水性介质中从乙酰丙酸选择性生产γ-戊内酯。对不同的生物炭进行了预处理（硝酸、氯化锌、二氧化碳或它们的组合），以活化最终的碳质载体。硝酸处理产生了具有高表面积的微孔生物炭，而用氯化锌进行化学活化则大大增加了介孔表面。两种处理的组合产生了具有优异织构性质的载体，使得能够制备出表面积为1422 m²/g的Ru/C催化剂，其中1210 m²/g为介孔表面。充分讨论了生物炭预处理对钌基催化剂催化性能的影响。
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