分子筛和γ-AI 203混合载体上负载Ni和W的加氢裂解催化剂的EXAFS研究
분자사화γ-AI 203혼합재체상부재Ni화W적가경렬해최화제적EXAFS연구
EXAFS Study of Ni/W/Zeolite/Al2O3 Hydrocracking Catalyst Sulfurized with Different Modified Zeolites
  • 万方数据
    高等学校化学学报 고등학교화학학보
    CHEMICAL JOURNAL OF CHINESE UNIVERSITIES
    2000年 10期 1459-1463 ,共5页

    张健%鲁海龙%孙建伟%姚建东%李全芝%关明华%王继锋%丁连会%尹泽群%胡天斗%谢亚宁

    장건%로해룡%손건위%요건동%리전지%관명화%왕계봉%정련회%윤택군%호천두%사아저

    加氢裂解催化剂%分子筛%ExAFs%NiWS相 加氫裂解催化劑%分子篩%ExAFs%NiWS相
    가경렬해최화제%분자사%ExAFs%NiWS상
    Hydrocracking catalyst%Zeolites%EXAFS%NiWS phase (Ed.: M,G)
    运用ExAFs技术对Ni负载于4种改性Y分子筛与A12O3混合载体上的加氢裂解催化剂进行了研究，结果表明，硫化态催化剂中W和Ni均未被完全硫化，除硫化态外，大部分W处于钨氧硫(WOs)状态，而部分Ni为氧化物，不同分子筛对Ni和W的硫化程度的影响不同.另外催化剂中存在少量的NiWs相，载体的B酸位与催化剂中的NiWs相的多少有较好的相关性.
    운용ExAFs기술대Ni부재우4충개성Y분자사여A12O3혼합재체상적가경렬해최화제진행료연구，결과표명，류화태최화제중W화Ni균미피완전류화，제류화태외，대부분W처우오양류(WOs)상태，이부분Ni위양화물，불동분자사대Ni화W적류화정도적영향불동.령외최화제중존재소량적NiWs상，재체적B산위여최화제중적NiWs상적다소유교호적상관성.
    Four hydrocracking catalysts supported on different kinds of modified Y zeolites were studied by utilizing EXAFS(Extend X-ray Absorption Fine Structure). The results show that the Ni and W in the catalysts have not been thoroughly sulfided. Apart from the sulfided state, the tungsten in the sulfided catalysts exists in a state of oxosulfided tungsten while some nickels exist in their oxide state. In addition,it also shows that there are NiWS species in the sulfided catalysts and the amount of which shows a good correlation with the Bronsted acid sites of the mixture supports of zeolites and γ-Al2Os. It means that the NiWS species maybe exist mainly in the cavities of the zeolites and the tungsten in micropore zeolites is more difficult to be sulfided than that on the surface of amorphous Al2O3.
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