Metal-Supported Niobium Catalysts Investigation for Conversion of Bio-Renewable Glycerol to Organic Compounds

Journal of the Brazilian Chemical Society

article

Pestana, Carolina F. M.¹  Pinto, Bianca P.¹  Fernandes, Daniella R.¹  Mota, Claudio J. A.¹ 

[1] Universidade Federal do Rio de Janeiro

关键词: acrolein;    acrylic acid;    dehydration;    glycerol;    niobium-base catalysts;    oxidation;   

DOI  :  10.21577/0103-5053.20220035

学科分类：内科医学

来源: SciELO

【 摘 要 】

The glycerol oxidative dehydration to organic compounds, especially acrolein and acrylic acid, was studied over vanadium, molybdenum, and cobalt oxides supported on niobium oxide and niobium phosphate catalysts. At 300 °C, the glycerol conversion was 100% over all catalysts tested, and acrolein was the main product observed, without significant deactivation within the time on stream studied. Except for Co/V/Nb2O5, acrylic acid was formed over all catalysts, but the selectivity was not higher than 10%. Acetaldehyde and acetic acid were the other organic oxygenated products formed. Although the catalysts supported over Nb2O5 presented significantly lower acidity than the catalysts supported over NbOPO4, they showed 100% glycerol conversion, indicating that the dehydration of glycerol does not require strong acidity. These data indicate the potential of niobium-based supports in the development of an active and selective catalyst for the glycerol oxidehydration to acrolein and acrylic acid, chemicals of great importance in the industry.

【 授权许可】

CC BY