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The Role of Various Chlorides on Xylose Conversion to Furfural: Experiments and Kinetic Modeling
Author(s) -
Ershova Olga,
Nieminen Kaarlo,
Sixta Herbert
Publication year - 2017
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201700269
Subject(s) - furfural , xylose , chemistry , catalysis , yield (engineering) , aqueous solution , hydrolysate , decomposition , metal ions in aqueous solution , nuclear chemistry , inorganic chemistry , organic chemistry , metal , hydrolysis , materials science , fermentation , metallurgy
In this paper, the catalytic activity of thirteen different metal chlorides in aqueous solution for the conversion of xylose into furfural was studied in comparison with both the auto‐ and HCl‐catalyzed reactions. A maximum furfural yield of 60.3 mol % was reached with the addition of FeCl 3 to the aqueous xylose solution. However, the catalytic efficiency of FeCl 3 decreased on use of birch hydrolysate as a raw material, resulting in 43.5 mol % furfural yield. The obtained experimental results were incorporated in a kinetic modeling study. The assessed reaction rates for xylose dehydration to furfural and xylose decomposition to byproducts, in the presence of AlCl 3 and CrCl 3 are significantly higher than during acid‐catalyzed conversion. The logarithms of the reaction rates show a linear correlation with the ionization energy as well as with the acidity of the metal ions.