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Furfural hydrodeoxygenation on iron and platinum catalysts
Applied Catalysis A: General ( IF 4.7 ) Pub Date : 2019-08-26 , DOI: 10.1016/j.apcata.2019.117217
M. Soledad Zanuttini , Martin Gross , Gustavo Marchetti , Carlos Querini

Furfural can be converted into a wide range of high-octane products like 2-methylfuran (2-MF) through hydrodeoxygenation (HDO). Iron-based catalyst (Fe/SiO2), has shown high selectivity for gas phase conversion of furfural to 2-MF at atmospheric pressure and 573 K. However, it showed rapid deactivation. Furfural is the main coke precursor, although coke is also formed when 2-MF and furan are used as reactants, but in lower quantities. Coke profiles along the catalytic bed suggest that tetra-hydrofuran is an important coke precursor. The addition of a second metal like platinum, even in very low proportions, generates hydrogen spillover leading to an important improvement in the stability of the catalyst. The Fe/Pt ratio on the surface regulates the amount of coke deposited because it modifies the iron particle sizes, the interaction with the support and the amount of hydrogen available for the reactions. These phenomena influence the reaction, coke formation and regeneration mechanisms.



中文翻译:

铁和铂催化剂上的糠醛加氢脱氧

糠醛可通过加氢脱氧(HDO)转化为各种高辛烷值产品,例如2-甲基呋喃(2-MF)。铁基催化剂(Fe / SiO 2)在大气压和573 K下对糠醛向2-MF的气相转化显示出很高的选择性。然而,它显示出快速失活的作用。糠醛是主要的焦炭前体,尽管当使用2-MF和呋喃作为反应物时也会形成焦炭,但数量较少。沿催化床的焦炭分布表明四氢呋喃是重要的焦炭前体。即使以非常低的比例添加第二种金属(如铂)也会产生氢溢出,从而导致催化剂稳定性的重要改善。表面上的Fe / Pt比调节沉积的焦炭量,因为它改变了铁的粒径,与载体的相互作用以及可用于反应的氢气量。这些现象影响反应,焦炭形成和再生机理。

更新日期:2019-08-26
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