scholarly journals Tuning Brønsted and Lewis acidity on phosphated titanium dioxides for efficient conversion of glucose to 5-hydroxymethylfurfural

RSC Advances ◽  
2021 ◽  
Vol 11 (47) ◽  
pp. 29196-29206
Author(s):  
Siripit Songtawee ◽  
Bunyarat Rungtaweevoranit ◽  
Chalida Klaysom ◽  
Kajornsak Faungnawakij

Tunable Lewis and Brønsted acid sites on P–TiO2 tandem catalysts for glucose-to-HMF conversion providing high HMF yield (72%) and selectivity (83%).

RSC Advances ◽  
2016 ◽  
Vol 6 (16) ◽  
pp. 12782-12787 ◽  
Author(s):  
Ye-Min Lu ◽  
Hu Li ◽  
Jian He ◽  
Yan-Xiu Liu ◽  
Zhi-Bing Wu ◽  
...  

Mesoporous AlF3 material bearing both Lewis and Brønsted acid sites exhibits high catalytic performance in glucose-to-fructose isomerization and subsequent dehydration to HMF (57.3% yield).


Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 2015
Author(s):  
Łukasz Kuterasiński ◽  
Małgorzata Smoliło-Utrata ◽  
Joanna Kaim ◽  
Wojciech Rojek ◽  
Jerzy Podobiński ◽  
...  

The aim of the present paper is to study the speciation and the role of different active site types (copper species and Brønsted acid sites) in the direct synthesis of furan from furfural catalyzed by copper-exchanged FAU31 zeolite. Four series of samples were prepared by using different conditions of post-synthesis treatment, which exhibit none, one or two types of active sites. The catalysts were characterized by XRD, low-temperature sorption of nitrogen, SEM, H2-TPR, NMR and by means of IR spectroscopy with ammonia and CO sorption as probe molecules to assess the types of active sites. All catalyst underwent catalytic tests. The performed experiments allowed to propose the relation between the kind of active centers (Cu or Brønsted acid sites) and the type of detected products (2-metylfuran and furan) obtained in the studied reaction. It was found that the production of 2-methylfuran (in trace amounts) is determined by the presence of the redox-type centers, while the protonic acid sites are mainly responsible for the furan production and catalytic activity in the whole temperature range. All studied catalysts revealed very high susceptibility to coking due to polymerization of furfural.


2015 ◽  
Vol 119 (19) ◽  
pp. 10427-10438 ◽  
Author(s):  
Amber Janda ◽  
Bess Vlaisavljevich ◽  
Li-Chiang Lin ◽  
Shaama Mallikarjun Sharada ◽  
Berend Smit ◽  
...  

2003 ◽  
Vol 125 (46) ◽  
pp. 13964-13965 ◽  
Author(s):  
Weiguo Song ◽  
David M. Marcus ◽  
Saifudin M. Abubakar ◽  
Emma Jani ◽  
James F. Haw

2005 ◽  
Vol 7 (8) ◽  
pp. 1861-1869 ◽  
Author(s):  
Laetitia Oliviero ◽  
Alexandre Vimont ◽  
Jean-Claude Lavalley ◽  
Francisca Romero Sarria ◽  
Marina Gaillard ◽  
...  

2010 ◽  
Vol 114 (18) ◽  
pp. 8363-8374 ◽  
Author(s):  
Emiel J. M. Hensen ◽  
Dilip G. Poduval ◽  
D. A. J. Michel Ligthart ◽  
J. A. Rob van Veen ◽  
Marcello S. Rigutto

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