Journal
DALTON TRANSACTIONS
Volume 51, Issue 8, Pages 3213-3224Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1dt03817f
Keywords
-
Categories
Funding
- Chair of Technical Chemistry II at Technische Unviersitat Munchen
- Smart2 Erasmus Program, CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico), Centro de Tecnologias Estrategicas do Nordeste [INT/MCT-FACEPE APQ-1015-3.06/14]
- Central Analitica [UFC/CT-INFRA/MCTI-SISNANO/Pro-Equipamentos], Project CAPES/FUNCAP (Areas Estrategicas) [E1-0079-0004301]
Ask authors/readers for more resources
This study assessed the impact of rehydration on the catalytic properties of Mg/Al layered double hydroxides (LDH) for glycerol oligomerization. A LDH modification strategy was developed with the addition of acetic acid, which improved the selectivity to diglycerol. Recycling of the modified LDH showed better performance compared to the non acid treated material. Loss of metallic species by leaching to the reaction products was not observed, an advantage over previous works.
In this study, the impact of rehydration on the catalytic properties of Mg/Al layered double hydroxides (LDH) for glycerol oligomerization was assesed. Although previous works have employed other LDH derived materials in this reaction, little information on recyclability is published. After observing the initial results on how basicity and surface area were related to the catalytic activty, an LDH modification strategy was developed with the addition of acetic acid. Changes on the basic site distribution were noticed and consequently, selectivity to diglycerol was improved. The best catalytic performance (reaction with 4 wt% cat., at 240 degrees C for 8 hours) led to 64% of glycerol conversion (X-Gly) and 37% of diglycerol selectivity (S-di). Aditionally, reciclying of modified LDH was better than the non acid treated material, presenting higher yield of diglycerol. Catalyst deactivation was related to the harsh reaction conditions and to the blockage of active species by impurities. Loss of metallic species by leaching to the reaction products was not oberseved, an advantage in comparison with previous works.
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