Mitsuoka Shunma, Murata Kosuke, Hashimoto Tadanori, Chen Ning, Jonoo Yuki, Kawabe Sho, Nakao Keita, Ishihara Atsushi
Division of Chemistry for Materials, Graduate School of Engineering, Mie University, 1577 Kurima Machiya-Cho, Tsu City, Mie Prefecture 514-8507, Japan.
Zeolite Group, Institute of Inorganic Materials, Nanyo Office, Tosoh Corporation, 4560 Kaisei-Cho, Shunan City, Yamaguchi Prefecture 746-8501, Japan.
ACS Omega. 2024 Jan 8;9(3):3669-3674. doi: 10.1021/acsomega.3c07678. eCollection 2024 Jan 23.
Hydrocracking of fat or Fischer-Tropsch (FT) wax from biomass to produce the jet fuel of sustainable aviation fuel has been one of the key reactions. -Heptadecane, which is one of the model diesel fractions produced from fat or FT wax, has hardly been used for hydrocracking of hydrocarbon for jet fuel production, while -hexadecane has often been used as one of the model compounds for this reaction. In the present study, a HY-zeolite (50 wt %, SiO/AlO = 100)-AlO (50 wt %) composite-supported Pt (0.5 wt %) catalyst [0.5Pt/Y(100)35A] was tested for hydrocracking of -heptadecane using a fixed-bed flow reactor at a H pressure of 0.5 MPa, H flow rate of 300 mL/min, WHSV of 2.3 h, and a catalyst weight of 2 g. Fine-tuning of the temperature to 295 °C achieved the highest selectivity of 74% for the jet fuel fraction C8-C15 with the high conversion of 99%. The jet fuel yield reached 73%, which was almost an ideal maximum yield of 75%. Similar hydrocracking of -hexadecane has just reported the maximum yield of 51% for jet fuel fraction. Further, 0.5Pt/Z(110)35A, which has a composition similar to that of 0.5Pt/Y(100)35A except for the type of zeolite, could not give as high yield of jet fuel as 0.5Pt/Y(100)35A because the rapid conversion to lighter fractions than the jet fuel occurred by the slight increase in the reaction temperature even at a lower temperature range.
将来自生物质的脂肪或费托（FT）蜡进行加氢裂化以生产可持续航空燃料的喷气燃料，一直是关键反应之一。十七烷是由脂肪或FT蜡生产的典型柴油馏分之一，几乎未被用于烃类加氢裂化以生产喷气燃料，而十六烷常被用作该反应的典型化合物之一。在本研究中，使用固定床流动反应器，在氢气压力0.5MPa、氢气流速300mL/min、重时空速2.3h⁻¹以及催化剂重量2g的条件下，对一种HY型沸石（50wt%，SiO₂/Al₂O₃ = 100）-Al₂O₃（50wt%）复合载体负载的Pt（0.5wt%）催化剂[0.5Pt/Y(100)35A]进行了十七烷加氢裂化测试。将温度微调至295℃时，喷气燃料馏分C₈ - C₁₅的选择性最高可达74%，转化率高达99%。喷气燃料产率达到73%，几乎是理想的最大产率75%。类似的十六烷加氢裂化报道的喷气燃料馏分最大产率仅为51%。此外，0.5Pt/Z(110)35A，其组成与0.5Pt/Y(100)35A相似，只是沸石类型不同，由于即使在较低温度范围内反应温度略有升高，就会快速转化为比喷气燃料更轻的馏分，所以无法获得与0.5Pt/Y(100)35A一样高的喷气燃料产率。
