不同水热温度下KIT-5/Beta复合材料的设计合成及其加氢脱氮性能研究OA
Design and synthesis of KIT-5/Beta composites under varied hydrothermal temperatures and evaluation of their hydrodenitrogenation performance
以原位自组装水热合成法制备的KIT-5/Beta复合材料为载体,采用等体积浸渍法制备NiW/KIT-5/Beta催化剂.通过XRD,SEM,TEM,py-FTIR,H2-TPR,XPS等表征方法研究了不同水热温度对复合载体及相应催化剂理化性质的影响.以喹啉为模型反应物,在温度320 ℃,压力4 MPa,WHSV为4.8 h-1的反应条件下,考察了不同催化剂的加氢脱氮性能.结果表明,通过改变水热合成温度可以调控分子筛的比表面积和孔道结构,进而调控催化剂的活性位点数量.当水热合成温度为125 ℃时,NiW/KB-125催化剂表现出最佳的喹啉脱氮率96.8％,这主要归因于NiW/KB-125催化剂优异的孔道结构,较大的比表面积(883 m2/g)和孔容(0.77 cm3/g),较多的B酸位点、较高的金属硫化度(80.12％)和适宜的金属载体相互作用力(MSI).
KIT-5/Beta composite supports were synthesized using an in situ self-assembly hydrothermal method,and NiW/KIT-5/Beta catalysts were prepared by impregnation.A series of characterization techniques were utilized to evaluate the influence of varying hydrothermal synthesis temperatures on the physicochemical properties of both the KIT-5/Beta supports and the resulting catalysts.The catalytic performances of catalysts were evaluated under reaction conditions of 320 ℃,4 MPa H2 pressure,and a weight hourly space velocity(WHSV)of 4.8 h-1 for hydrodenitrogenation(HDN)of quinoline.The results indicated that the specific surface area and pore structure of the materials could be effectively regulated by adjusting the hydrothermal synthesis temperature,which in turn influenced the number of active sites on the catalyst.The NiW/KB-125 catalyst,synthesized at 125 ℃,presented the highest quinoline HDN efficiency(96.8％),which can be attributed to its favorable pore channel structure,greater Brønsted acid number,higher degree of metal sulfidation(80.12％)and appropriate metal-support interaction(MSI).
刘兴;赵亮富;郭少青;崔海涛;李振荣;李鑫;王磊;武行洁;王潇潇;袁利静
山西工学院能源工程学院,山西朔州 036000中国科学院山西煤炭化学研究所,山西太原 030001太原科技大学环境与资源学院,山西太原 030024中国科学院山西煤炭化学研究所,山西太原 030001中国科学院山西煤炭化学研究所,山西太原 030001中国科学院山西煤炭化学研究所,山西太原 030001中国科学院山西煤炭化学研究所,山西太原 030001中国科学院山西煤炭化学研究所,山西太原 030001太原科技大学化学工程与技术学院,山西太原 030024太原科技大学能源与材料工程学院,山西太原 030024
化学化工
介微孔材料KIT-5/Beta复合分子筛NiWS喹啉加氢脱氮
mesoporous-microporous materialKIT-5/Beta compositeNiWSquinolinehydrodenitrogenation
《燃料化学学报（中英文）》 2026 (1)
55-66,12
Supported by the Autonomous Research Project of SKLCC(2024BWZ003),Strategic Priority Research Program of the Chinese Academy of Sciences(XDA0390401)and the Doctoral Research Start-up Funding of Shanxi Institute of Technology(026012).
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