文献类型：期刊文献

英文题名：Bimetallic Re_x-Ru/C catalyst for fatty acid esters to diesel-range alkanes under low temperature

作者：Zhao, Jiaping[1,2] Cao, Xincheng[1,2] Liu, Peng[1,2] Long, Feng[1,2] Wu, Shiyu[1,2] Xu, Junming[1,2] Jiang, Jianchun[1,2]

第一作者：Zhao, Jiaping;赵佳平

通信作者：Zhao, JP[1];Xu, JM[1];Jiang, JC[1]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Natl Engn Lab Biomass Chem Utilizat, 16 Suojin Five Village, Nanjing 210042, Peoples R China;[2]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Res, Nanjing, Peoples R China

年份：2024

外文期刊名：INTERNATIONAL JOURNAL OF GREEN ENERGY

收录：;EI(收录号：20244717407115);Scopus(收录号：2-s2.0-105002635211);WOS:【SCI-EXPANDED(收录号:WOS:001357526200001)】；

基金：This work was financially supported by Fundamental Research Funds of CAF [CAFYBB2022ZC003].

语种：英文

外文关键词：Bio-based oil; low temperature hydrogenation; bimetallic catalysts; biodiesel; performance

摘要：The hydrogenation of bio-based oil into biodiesel is a key strategy in reducing reliance on fossil fuels. However, efficient catalysts are needed to enable low-temperature hydrogenation reactions due to the current high-temperature requirement for bio-based oil hydrogenation. Here, bimetallic catalysts Rex-Ru/C for low-temperature hydrogenation of bio-based oils were prepared. The presence of Re oxides (ReOx) in the catalyst enhances the abundance of weak and medium acid sites, thereby facilitating the adsorption of H2. The DFT calculation shows the introduction of Re also improved the adsorption capacity of the catalyst for fatty acid methyl ester and H2. The Re0.25-Ru/C catalyst exhibits superior conversion, selectivity, and recyclability at low temperatures compared to the previously reported catalysts, achieving 100% conversion of methyl stearate with 100% selectivity toward n-heptadecane (C17) and n-octadecane (C18) (reaction conditions: 150 degrees C, 4 h, 2.5 MPa H2). Moreover, the catalyst also shows excellent hydrogenation activity toward various fatty acids or esters, including methyl palmitate, stearic acid, and palmitate at low temperatures. The Re0.25-Ru/C catalyst showed consistent recycling performance over 9 cycles. The decline in catalytic performance of the catalyst was primarily caused by a reduction in ReOx content, resulting in a decrease in acid site concentration. Consequently, there was reduced adsorption of H2 and oil on the catalyst.