Effect of the nature of carbon support on the formation of active sites in Pd/C and Ru/C catalysts for hydrogenation of furfural
Effect of the nature of carbon support on the formation of active sites in Pd/C and Ru/C catalysts for hydrogenation of furfural
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DOI：
10.1016/j.cattod.2014.10.037
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发表时间：
2015-07-01
期刊：
影响因子：
5.3
通讯作者：
Likholobov, Vladimir A.
中科院分区：
文献类型：
--
作者：
Mironenko, Roman M.;Belskaya, Olga B.;Likholobov, Vladimir A.
研究了碳纳米管(CNT)和炭黑(CB)担载的Pd/C和Ru/C催化剂中活性中心的形成和催化性能。在呋喃甲醛水相加氢反应中，碳载体的性质影响负载金属的分散性及其催化性能。1.5%Pd/CB催化剂在温度为50℃、氢气压力为0.5 Mpa的条件下，对呋喃甲醛加氢反应具有较高的选择性(99%)。在温和的反应条件下(50℃，0.5 Mpa)，1.5%Pd/CNT催化剂的活性不高，但在严酷的条件下(90℃，0.5或2.0 Mpa)，四氢呋喃醇产率增加，表现出更大的还原呋喃环的倾向。无论载体性质和反应条件如何，Ru样品在水相加氢反应中的活性都很低，这可能是由于水在活性中心上的不可逆吸附所致。(C)2014爱思唯尔B.V.保留所有权利。
The study considered the formation and catalytic properties of the active sites in Pd/C and Ru/C catalysts supported on carbon nanotubes (CNT) and carbon black ( CB). The nature of carbon support was shown to affect the dispersion of supported metal and its catalytic properties in the aqueous-phase hydrogenation of furfural. The 1.5% Pd/CB catalyst demonstrated a high selectivity (99%) for furfuryl alcohol during hydrogenation of furfural at a temperature of 50 degrees C and hydrogen pressure of 0.5 MPa. The 1.5% Pd/CNT catalyst was not active under mild conditions of the reaction (50 degrees C, 0.5 MPa), but had a greater tendency to reduce the furan ring under severe conditions (90 degrees C, 0.5 or 2.0 MPa) as demonstrated by an increased yield of tetrahydrofurfuryl alcohol. The ruthenium samples showed a low activity in aqueous-phase hydrogenation of furfural irrespective of the support nature and reaction conditions, possibly due to irreversible adsorption of water on the active sites. (C) 2014 Elsevier B.V. All rights reserved.