Selective hydrogenation of lignin-derived compounds under mild conditions
作者:Lu Chen、Antoine P. van Muyden、Xinjiang Cui、Gabor Laurenczy、Paul J. Dyson
DOI:10.1039/d0gc00121j
日期:——
processes used in their production. Here, we show that well-defined Rh nanoparticles dispersed in sub-micrometer size carbon hollow spheres, are able to hydrogenate lignin derived products undermildconditions (30 °C, 5 bar H2), in water. The optimum catalyst exhibits excellent selectivity and activity in the conversion of phenol to cyclohexanol and other related substrates including aryl ethers.
木质素衍生化学品生产中的关键挑战是减少其生产中使用的能源密集型过程。在这里,我们显示了分散在亚微米尺寸的碳空心球中的定义明确的Rh纳米粒子能够在温和条件下(30°C,5 bar H 2)在水中氢化木质素衍生产品。最佳催化剂在苯酚向环己醇和其他相关底物(包括芳基醚)的转化中表现出出色的选择性和活性。
Promising Ni/Al-SBA-15 catalysts for hydrodeoxygenation of dibenzofuran into fuel grade hydrocarbons: synergetic effect of Ni and Al-SBA-15 support
作者:Sharafadeen Gbadamasi、Tammar Hussein Ali、Lee Hwei Voon、Abdulazeez Yusuf Atta、Putla Sudarsanam、Suresh K. Bhargava、Sharifah Bee Abd Hamid
DOI:10.1039/c5ra27526a
日期:——
has been undertaken with the aim of designing promising noble-metal-free catalysts for efficient hydrodeoxygenation (HDO) of dibenzofuran (DBF) into fuel grade hydrocarbons. For this, various Ni/Al-SBA-15 catalysts with different Si/Al (50, 60, 70 and 80) mole ratios were synthesized and their catalytic performance was tested for HDO of DBF in a batch reactor. The catalysts were systematically characterized
Nickel and cobalt phosphides as effective catalysts for oxygen removal of dibenzofuran: role of contact time, hydrogen pressure and hydrogen/feed molar ratio
作者:A. Infantes-Molina、E. Gralberg、J. A. Cecilia、Elisabetta Finocchio、E. Rodríguez-Castellón
DOI:10.1039/c5cy00282f
日期:——
catalytic activity of nickel and cobalt phosphides, with a metal loading of 5 wt.%, supported on silica was investigated in the hydrodeoxygenation reaction (HDO) of dibenzofuran (DBF) as a model oxygenated compound at different contact times, H2 pressures and H2/DBF molar ratios. The aim of the study was to understand the mechanism of the reaction and to study the impact of H2 pressure and H2/DBF molar
Effective hydrodeoxygenation of dibenzofuran by a bimetallic catalyst in water
作者:Peng Dong、Guo-ping Lu、Chun Cai
DOI:10.1039/c5nj02164b
日期:——
hydrodeoxygenation (HDO) of dibenzofuran (DBF) catalyzed by a bimetallic nickel/platinum (Ni/Pt) catalyst in water was demonstrated at 200 °C and 1.2 MPa hydrogen (H2) pressure. The bimetalliccatalysts prepared by a wet chemical method exhibit prominent activity that overcomes the limitations of use of a single Ni or Pt metal catalyst. The yield of HDO products can be up to 90%. Reaction results indicate
Abstract Bifunctional PdNb catalysts were studied in the hydrodesoxygenation (HDO) reaction of dibenzofuran (DBF) at 275 °C and 15 bar of H2 pressure. The influence of both the support employed (silica and zirconiumphosphate heterostructure (PPH)) and the catalyst preparation procedure were evaluated in the catalytic response in the HDO reaction. The catalysts were prepared by incipient wetness impregnation
摘要 研究了双功能 PdNb 催化剂在 275 °C 和 15 bar H2 压力下二苯并呋喃 (DBF) 的加氢脱氧 (HDO) 反应。在 HDO 反应中的催化响应中评估了所用载体(二氧化硅和磷酸锆异质结构 (PPH))和催化剂制备过程的影响。采用两种合成路线通过初湿浸渍制备催化剂。通过X射线衍射(XRD)、N2吸附-脱附、NH3热程序脱附(TPD-NH3)、X射线光电子能谱(XPS)、透射电子显微镜(TEM)和元素分析对催化剂进行了表征。结果表明,二氧化硅负载的催化剂比PPH负载的催化剂活性高得多。虽然表征结果表明负载型催化剂在 PPH 上的更高分散性和更好的结构和酸性性能,但即使在煅烧和催化测试之后,PdCl2 前体盐仍保留在这些催化剂上,这解释了这些系统呈现出较低的催化性能:活性中心较少和更多的碳残留物。就制备方法而言,无论采用何种载体,在掺入 Nb 和煅烧后掺入 Pd 合成的催化