Journal
MOLECULAR CATALYSIS
Volume 458, Issue -, Pages 198-205Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mcat.2017.12.010
Keywords
Pyruvic aldehyde; Methylglyoxal; 2-Hydroxypropanoic acid; Glycerol; Acid catalyst
Categories
Funding
- CNPq (Brazil)
- FAPERJ (Brazil)
- CAPES/Embrapa (Brazil)
- PCI/CNPq [313014/2016-7]
Ask authors/readers for more resources
The eventual role played by Bronsted and Lewis acid sites on pyruvaldehyde Cannizzaro reaction to lactic acid was investigated in a flow reactor using different catalysts bearing different acidity. It was shown that Lewis acid sites on heterogeneous catalysts are crucial for the reaction while Bronsted sites play no role at all. The results revealed that catalytic activity is indeed directly related to catalyst acidity. TiO2, ZrO2 and Nb2O5 were the most promising catalysts and their activity was related to their water-tolerant Lewis acid sites. Nb2O5 was shown to be the most active and stable catalyst while ZnO underwent a fast deactivation process ascribed to the formation of amorphous carbonaceous materials as revealed by TG and laser Raman spectroscopy. (C) 2017 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available