负载型Co基双功能催化剂上戊酸酯生物燃料的制备

采用浸渍法制备了HZSM-5、HY、Hβ以及MCM-22四种载体上负载Co的催化剂，在高压反应釜中，开展了以乙酰丙酸乙酯为原料一步法加氢脱氧合成戊酸乙酯以及戊酸生物燃料的研究。采用XRD、XPS、TEM、FT-IR、NH₃-TPD、H₂-TPR、py-FTIR、ICP-AES等对催化剂进行表征。结果表明，10Co/HZSM-5催化剂由于Co在HZSM-5上分布均匀，并且B酸酸性、总酸量以及还原性能最优，在保持较高的反应性能的同时，提高了产物的选择性，具有较高的催化性能。进一步对反应温度、反应压力等进行优化，在反应温度为240℃、压力为3 MPa、反应3 h时，以正辛烷作溶剂，催化剂表现出较高的催化性能，乙酰丙酸乙酯的转化率达到100%，戊酸酯和戊酸的总收率可达90%。

Synthesis of valerate biofuels on supported Co-based bifunctional catalysts

Four types of Co-supported catalysts, HZSM-5, HY, Hβ and MCM-22, were prepared by the impregnation method. In the high-pressure reactor, the prepared catalyst is used as a raw material for one-step hydrodeoxygenation of ethyl levulinate to synthesize ethyl valerate and valeric acid biofuel. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), Fourier infrared (FT-IR), NH₃-TPD, H₂-TPR, py-FTIR, ICP-AES and other technologies are used for catalyst characterization. The results show that, because Co is uniformly distributed on HZSM-5, B acidity, total acidity and reduction performance are the best, while maintaining high reactivity, it improves the selectivity of the product. Therefore, the 10Co/HZSM-5 catalyst has higher catalytic performance. The reaction temperature, reaction pressure, etc. are further optimized. When the reaction temperature is 240℃, the pressure is 3 MPa, and the reaction is 3 h, with n-octane as the solvent, the catalyst shows higher catalytic performance, and the conversion rate of ethyl levulinate reaches 100%, the total yield of valerate and valeric acid can reach 90%.