Levulinic acid (LA) is one of the substances, which can be obtained from cellulosic biomass via acid hydrolysis and serves as a precursor in the synthesis of gamma-valerolactone (GVL) – platform chemical for so-called valeric fuels. This work is devoted to the study of catalytic conversion of LA to GVL using mono- (Ru) and bimetallic (Ru-Co) catalysts based on ruthenium-containing nanoparticles immobilized in hyper-crosslinked polystyrene (HPS). It was shown that RuO₂ nanoparticles are an active phase of HPS-based Ru catalysts, which allow nearly 100 % yield of GVL at 120 °C and 2 MPa of hydrogen partial pressure for the reaction time 60 min. Introduction of cobalt in catalyst composition in a proper amount (Ru-to-Co weight ratio is 30) was found to result in Ru redistribution inside the polymeric support and, in turn, to the increase of reaction rate of LA hydrogenation.

左旋丙酸（LA）是一种物质，可以通过酸水解从纤维素生物质中获得，并作为γ-戊内酯（GVL）（所谓的戊酸燃料的平台化学品）合成中的前体。这项工作致力于使用基于固定在超交联聚苯乙烯（HPS）中的含钌纳米粒子的单（Ru）和双金属（Ru-Co）催化剂，将LA转化为GVL的研究。结果表明RuO ₂纳米颗粒是基于HPS的Ru催化剂的活性相，在60分钟的反应时间内，在120°C和2 MPa的氢气分压下，GVL的收率接近100％。发现以适当的量（Ru与Co的重量比为30）将钴引入到催化剂组合物中会导致Ru在聚合物载体内的重新分布，进而导致LA氢化反应速率的增加。