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Liquid‐phase Hydrodeoxygenation of 4‐Propylphenol to Propylbenzene: Reducible Supports for Pt Catalysts
ChemCatChem ( IF 4.5 ) Pub Date : 2020-05-20 , DOI: 10.1002/cctc.202000429
Eveliina Mäkelä 1 , José Luis González Escobedo 1 , Jouni Neuvonen 1 , Jouko Lahtinen 2 , Marina Lindblad 3 , Ulla Lassi 4 , Reetta Karinen 1 , Riikka L. Puurunen 1
Affiliation  

Pyrolysis and liquefaction biocrudes obtained from lignocellulose are rich in phenolic compounds that can be converted to renewable aromatics. In this study, Pt catalysts on reducible metal oxide supports (Nb2O5, TiO2), along with irreducible ZrO2 as a reference, were investigated in the liquid‐phase hydrodeoxygenation (HDO) of 4‐propylphenol (350 °C, 20 bar H2, organic solvent). The most active catalyst was Pt/Nb2O5, which led to the molar propylbenzene selectivity of 77 %, and a yield of 75 % (98 % conversion). Reducible metal oxide supports provided an increased activity and selectivity to the aromatic product compared to ZrO2, and the obtained results are among the best reported in liquid‐phase. The reusability of the spent catalysts was also studied. The spent Pt/Nb2O5 catalyst provided the lowest conversion, while the product distribution of the spent Pt/ZrO2 catalyst changed towards oxygenates. The results highlight the potential of pyrolysis or liquefaction biocrudes as a source of aromatic chemicals.

中文翻译:

4-丙基苯酚的液相加氢脱氧为丙基苯:Pt催化剂的可还原载体

从木质纤维素获得的热解和液化生物原油富含酚类化合物,可以转化为可再生的芳族化合物。在这项研究中,在4-丙基苯酚的液相加氢脱氧(HDO)(350°C,室温)下,研究了可还原金属氧化物载体(Nb 2 O 5,TiO 2)上的Pt催化剂以及不可还原ZrO 2作为参考。 20 bar H 2,有机溶剂)。活性最高的催化剂是Pt / Nb 2 O 5,其丙基苯的摩尔选择性为77%,产率为75%(转化率98%)。与ZrO 2相比,可还原的金属氧化物载体对芳族产品的活性和选择性提高,并且所获得的结果在液相中报道得最好。还研究了废催化剂的可重复使用性。废Pt / Nb 2 O 5催化剂的转化率最低,而废Pt / ZrO 2催化剂的产物分布向含氧化合物变化。结果突出了热解或液化生物原油作为芳香族化学品来源的潜力。
更新日期:2020-05-20
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