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Characterization by temperature-programmed reduction of non-conventional catalysts for hydrotreatment
被引：0
作者：
S.A. Giraldo de León
P. Grange
B. Delmon
机构：
关键词：
Hydrotreating;
Mechanical Mixture;
Molybdenum Sulfide;
Hydrotreatment Catalyst;
Thiophene Hydrodesulfurization;
D O I：
10.1023/A:1019099309001
中图分类号：
学科分类号：
摘要：
A temperature-programmed reduction (TPR) study of three series of biphasic hydrotreating (HDT) catalysts - PtS/γ-Al2O3/(PtS/ γ-Al2O3+MoS2); Rh2S3/γ-AlOOH/(Rh2S3/γ-AlOOH+WS2) and PdS/γ-Al2O3/(PdS/ γ-Al2O3+WS2) - is presented. In all cases, the quantity of H2S produced is larger than that which would correspond to the arithmetic addition of the quantities produced by each of the sulfide phases alone. This fact suggests that the noble metal sulfide dissociates the hydrogen molecule to spill-over hydrogen (HSO), the latter producing a deeper reduction of molybdenum sulfide or tungsten sulfide. The similitude of catalytic effect in hydrogenation (HYD) and hydrodesulfurization (HDS) observed with the same mechanical mixture strongly suggests that HSO also plays a role in the synergy between MoS2 or WS2 and the noble metal sulfides.
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页码：51 / 55
页数：4
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