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Efficient Catalytic Hydrogenation of Butyl Levulinate to γ-Valerolactone over a Stable and Magnetic CuNiCoB Amorphous Alloy Catalyst
Energy & Fuels ( IF 5.2 ) Pub Date : 2018-03-27 00:00:00 , DOI: 10.1021/acs.energyfuels.8b00378
Bo Chen 1 , Haijun Guo 2, 3, 4 , Zhe Wan 1 , Xiaocheng Xu 1 , Hairong Zhang 2, 3, 4 , Dan Zhao 1 , Xinde Chen 2, 3, 4 , Ning Zhang 1
Affiliation  

A series of low-cost, magnetic, and high-efficiency CuNiCoB amorphous alloy catalysts were developed by the chemical reduction method for selective hydrogenation of butyl levulinate (BL) to γ-valerolactone (GVL). The catalysts were characterized by inductively coupled plasma optical emission spectrometry, Brunauer–Emmett–Teller, X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and hydrogen temperature-programmed desorption techniques. The results indicated that the CuNiCoB amorphous alloy nanosheets with well-dispersed Cu nanoparticles played an important role in enhancing the hydrogenation activity. The reaction temperature, pressure, time, and substrate concentration were optimized. The maximum GVL yield of 89.5% with BL conversion of 99.7% was achieved over the best Cu0.5Ni1Co3B catalyst using 3 wt % dosage relative to BL at 473 K under 3.0 MPa H2 after 3 h. The considerable stability of Cu0.5Ni1Co3B during catalytic recovery and reuse experiments (5 cycles) was exhibited as a result of the transformation of CuNiCoB amorphous alloy active sites to a Cu–Ni–Co ternary alloy. The stable and magnetic catalyst was demonstrated to be a promising candidate to produce more value-added compounds from biomass-derived raw materials.

中文翻译:

稳定且磁性的CuNiCoB非晶态合金催化剂上的高效戊二酸丁酯催化加氢成γ-戊内酯

通过化学还原方法开发了一系列低成本,磁性和高效的CuNiCoB非晶态合金催化剂,用于将乙酰丙酸丁酯(BL)选择性加氢为γ-戊内酯(GVL)。催化剂的特征在于电感耦合等离子体发射光谱,Brunauer-Emmett-Teller,X射线衍射,场发射扫描电子显微镜,透射电子显微镜,X射线光电子光谱和氢程序升温脱附技术。结果表明,具有良好分散的Cu纳米粒子的CuNiCoB非晶合金纳米片在增强氢化活性方面起着重要作用。优化了反应温度,压力,时间和底物浓度。BL转换为99时,最大GVL产率为89.5%。在3 h后,相对于BL在473 K,3.0 MPa H 2下使用3 wt%剂量的0.5 Ni 1 Co 3 B催化剂。Cu 0.5 Ni 1 Co 3 B在催化回收和再利用实验(5个循环)中具有相当大的稳定性,这是由于CuNiCoB非晶态合金活性部位转变为Cu–Ni–Co三元合金所致。事实证明,稳定且磁性的催化剂是从生物质衍生的原料生产更多增值化合物的有前途的候选者。
更新日期:2018-03-27
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