García Adrián, Sanchis Rut, Miguel Pablo J, Dejoz Ana M, Pico María Pilar, López María Luisa, Álvarez-Serrano Inmaculada, García Tomás, Solsona Benjamín
Departament d'Enginyeria Química, ETSE, Universitat de València Av. Universitat, 46100 Burjassot Valencia Spain
Sepiolsa Avda. del Acero, 14-16, Pol. UP-1 (Miralcampo), 19200 Azuqueca de Henares Spain.
RSC Adv. 2020 May 27;10(35):20395-20404. doi: 10.1039/d0ra04018e.
In the present article, γ-valerolactone has been obtained from levulinic acid with a yield exceeding 25% using very mild conditions without feeding hydrogen (30 °C, atmospheric pressure, water as the hydrogen source). The overall reaction conducted is a two-step process: first, a redox reaction involving the oxidation of metallic Zn to ZnO for hydrogen production through the water splitting reaction and, second, a catalytic reaction involving Ni-supported catalysts for the production of γ-valerolactone from levulinic acid. Ni active sites have been supported on sepiolite, an abundant and cheap material. The nickel particle size has been demonstrated to be a parameter of paramount importance determining the catalytic activity, since the best catalytic performance is obtained with the smallest Ni nanoparticles. This combination of Zn and Ni supported on sepiolite shows a good catalytic stability after three catalytic runs.
在本文中，在非常温和的条件下，不通入氢气（30℃、常压、以水作为氢源），从乙酰丙酸中获得了γ-戊内酯，产率超过25%。所进行的总反应是一个两步过程：首先，是一个氧化还原反应，涉及金属锌氧化为氧化锌以通过水分解反应制氢；其次，是一个催化反应，涉及负载镍的催化剂将乙酰丙酸转化为γ-戊内酯。镍活性位点负载在海泡石上，海泡石是一种储量丰富且价格低廉的材料。已证明镍颗粒尺寸是决定催化活性的至关重要的参数，因为最小的镍纳米颗粒具有最佳的催化性能。负载在海泡石上的锌和镍的这种组合在三次催化运行后显示出良好的催化稳定性。
