文章基本信息

标题：Niobium oxide (Nb2O5) as support for CoMo and NiW catalysts in the hydrodesulfurization reaction of 3-methylthiophene
其他标题：Evaluación de Catalizadores de CoMo y NiW soportados em Óxido de Niobio em Reacción de Hidrodesulfuración de 3-metiltiofeno
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作者：Roberta Lopes do Rosário ; Ronaldo Costa Santos ; Alan Silva dos Santos 等
期刊名称：Research, Society and Development
电子版ISSN：2525-3409
出版年度：2020
卷号：9
期号：11
页码：1-21
DOI：10.33448/rsd-v9i11.10307
出版社：Grupo de Pesquisa Metodologias em Ensino e Aprendizagem em Ciências
摘要：CoMo/Nb2O5 non-calcined support, despite the ratio pentane/pentene which has the inverse order. Furthermore, textural and chemical characterization techniques have been performed. From NH3-TPD analysis it was observed an acidity profile with a predominance of weak/strong and weak/moderate acid for CoMo and NiW catalysts, respectively. Meanwhile, the BET analysis has shown a low specific surface area for the catalysts supported by niobium oxide. Concerning the structure characteristic, the XRD analysis has suggested an amorphous phase in all catalysts analyzed.
其他摘要：The efficiency of niobium oxide as catalytic support of hydrodesulfurization (HDS) catalysts (CoMo and NiW) has been investigated in the HDS of a model molecule representative of sulfur compounds present in FCC gasoline (3-methylthiophene: 3MT). The NiW catalyst presented higher catalytic activity than CoMo calcined and non-calcined catalyst, however a better ratio pentane/pentene has been achieved by CoMo catalysts, which implies a lower formation of hydrogenated products. Indeed, the activity order for the catalysts evaluated is: NiW/Nb2O5 > CoMo/Nb2O5 calcined support > CoMo/Nb2O5 non-calcined support, despite the ratio pentane/pentene which has the inverse order. Furthermore, textural and chemical characterization techniques have been performed. From NH3-TPD analysis it was observed an acidity profile with a predominance of weak/strong and weak/moderate acid for CoMo and NiW catalysts, respectively. Meanwhile, the BET analysis has shown a low specific surface area for the catalysts supported by niobium oxide. Concerning the structure characteristic, the XRD analysis has suggested an amorphous phase in all catalysts analyzed.
关键词：Hydrodesulfurization; FCC gasoline; 3-methylthiophene; Niobium oxide; Interaction metal-support.
其他关键词：Hydrodesulfurization; FCC gasoline; 3-methylthiophene; Niobium oxide; Interaction metal-support.