Pt基催化剂对HVO加氢异构转化制SAF性能研究
韩孝坤 , 梁宇豪 , 韩兆皓 , 韩沂杭 , 刘京京 , 孙光政 , 刘宾 , 柴永明
现代化工 ›› 2026, Vol. 46 ›› Issue (10) : 171 -178.
Pt基催化剂对HVO加氢异构转化制SAF性能研究
Study on the performance of Pt-loaded molecular sieve catalysts for HVO hydroisomerization to SAF
采用氯铂酸等体积浸渍法制备了系列负载Pt的分子筛催化剂(Pt/SAPO-11,Pt/ZSM-22,Pt/ZSM-23,Pt/ZSM-35,Pt/ZSM-48),以正十六烷烃为模型化合物,在高压釜反应器,280℃、2.5 MPa H2的反应条件下评价了系列催化剂的异构转化反应性能,结果表明,Pt/ZSM-48高效催化正十六烷烃的异构转化,航煤组分异构化率达76.05%,航煤组分收率超过80%。采用X射线衍射(XRD)、扫描电子显微镜(SEM)、氮气吸附-脱附(N2吸附-脱附)、X射线光电子能谱(XPS)等手段对负载Pt的分子筛催化剂进行分析表征,结果表明,Pt/ZSM-48的酸密度大且具有强酸中心;Pt/SAPO-11和Pt/ZSM-23酸密度相近,但后者中强酸较多;Pt/ZSM-22和Pt/ZSM-35酸强度分布相似,但前者酸密度较大。并在10 mL固定床反应器上,以工业级氢化植物油(HVO)为原料,在320℃、4 MPa、1 h-1的条件下,对最优的Pt/ZSM-48进行性能评价,结果表明,航煤组分(C8~C16)收率达58.11%,航煤组分异构化率达66.95%。
A series of Pt-supported zeolite catalysts (Pt/SAPO-11,Pt/ZSM-22,Pt/ZSM-23,Pt/ZSM-35,Pt/ZSM-48) were prepared using an equal-volume impregnation method with chloroplatinic acid.Using n-hexadecane as a model compound,the isomerization performance of the catalysts was evaluated under reaction conditions of 280℃ and 2.5 MPa H2.Results indicate that the Pt/ZSM-48 catalyst efficiently catalyzes the isomerization of n-hexadecane,achieving a jet fuel fraction isomerization rate of 76.05% and a jet fuel fraction yield exceeding 80%.Pt-supported zeolite catalysts were characterized using X-ray diffraction (XRD),scanning electron microscopy (SEM),N2 adsorption-desorption,and X-ray photoelectron spectroscopy (XPS).Results indicated that Pt/ZSM-48 exhibits high acid density with strong acid sites;Pt/SAPO-11 and Pt/ZSM-23 show similar acid densities,but the latter contains more medium-strength acids;Pt/ZSM-22 and Pt/ZSM-35 exhibited similar acid strength distributions,though the former possessed higher acid density.Performance evaluation of the optimized Pt/ZSM-48 catalyst was conducted using industrial hydrogenated vegetable oil(HVO) feedstock in a 10 mL fixed-bed reactor under conditions of 320℃,4 MPa,and 1 h-1.Results showed a jet fuel fraction (C8-C16) yield of 58.11% and an isomerization rate of 66.95%.
生物航煤 / Pt / 催化剂 / 正十六烷烃 / 异构转化
bio-jet fuel / Pt / catalyst / n-hexadecane / isomerization conversion
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