Hydrocracking of bio-alkanes over Pt/Al-MCM-41 mesoporous molecular sieves for bio-jet fuel production
Hydrocracking of bio-alkanes over Pt/Al-MCM-41 mesoporous molecular sieves for bio-jet fuel production
复制标题
Pt/Al-MCM-41 介孔分子筛上生物烷烃加氢裂化用于生产生物喷气燃料
DOI：
10.1063/1.4962561
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发表时间：
2016-09-01
影响因子：
2.5
通讯作者：
Ji, Jianbing
中科院分区：
文献类型：
--
作者：
Lu, Meizhen;Liu, Xuejun;Ji, Jianbing
采用直接混合凝胶法制备了硅铝比在10 ~ 30之间的铂/硅MCM-41双功能催化剂。以生物柴油加氢脱氧生成的正十六烷和正十八烷组成的生物烷烃为原料，考察了该催化剂的加氢裂化性能。考察了温度、压力、重时空速（WHSV）和H2/正构烷烃质量比对生物烷烃转化率和产物分布的影响。发现转化率取决于催化剂载体的酸强度，其与Al含量成比例。然而，催化剂的选择性随着Al含量的增加而降低。最佳Si/Al比、温度、压力、WHSV和H2/正构烷烃重量比分别确定为20、330 °C、2 MPa、1 h-1和0.20。在此条件下，生物烷烃转化率和产物中煤油/汽油比分别达到65.62%和1.96。
Bi-functional catalysts consisting of platinum on aluminosilicate MCM-41 materials with Si/Al ratios between 10 and 30 were prepared via direct mixed-gel synthesis. The catalysts were tested in the hydrocracking of bio-alkanes, produced from biodiesel hydrodeoxygenation and composed of n-hexadecane and n-octadecane, for the production of bio-jet fuel. The effects of temperature, pressure, weight hourly space velocity (WHSV), and H2/n-paraffin weight ratio on bio-alkanes conversion and product distribution were examined. The conversion was found to be dependent on the acid strength of the catalyst supports which were proportional to the Al content. However, the catalyst selectivity decreased with the increasing Al content. The optimal Si/Al ratio, temperature, pressure, WHSV, and H2/n-paraffin weight ratio were determined to be 20, 330 °C, 2 MPa, 1 h−1, and 0.20, respectively. Under these conditions, the bio-alkanes conversion and kerosene/gasoline ratio in the product reached 65.62% and 1.96, respectively.