| Full text | |
| Author(s): |
Galhardo, Thalita S.
[1]
;
Simone, Nathalia
[1]
;
Goncalves, Maraisa
[1]
;
Figueiredo, Flavia C. A.
[1]
;
Mandelli, Dalmo
[1]
;
Carvalho, Wagner A.
[1]
Total Authors: 6
|
| Affiliation: | [1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210170 Santo Andre, SP - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | ACS SUSTAINABLE CHEMISTRY & ENGINEERING; v. 1, n. 11, p. 1381-1389, NOV 2013. |
| Web of Science Citations: | 40 |
| Abstract | |
Sulfonated carbons were prepared from carbonized rice husk and further treatment with sulfuric acid (TC-6M, sulfuric acid 6 mol L-1 under reflux, TC-L, concentrated 96% sulfuric acid under reflux, TC-V, vapor of concentrated 96% sulfuric acid). The catalytic activity of carbons was evaluated in esterification of glycerol with acetic acid (AA) and etherification of glycerol with tert-butyl alcohol (TBA). Only the TC-L carbon showed a significant amount of sulfur in its composition (2.2 mmol Cl-1). This catalyst also had the highest total acidity (5.8 mmol g(-1)) and improved the best catalytic performance in glycerol esterification and etherification. In the esterification reaction of glycerol, 90% conversion was observed after 5 h of reaction, with selectivities of 11%, 52%, and 37% to mono-, di-, and tri-glycerides, respectively. In the etherification of glycerol, after 4 h of reaction a conversion of 53% was achieved, with 25% selectivity to di-and tri-tert-butylglycerol. Thus, the use of sulfonated carbons in glycerol conversion proved to be an interesting alternative to add value to the production chains of rice and biodiesel by using their byproducts: rice husk and glycerol. (AU) | |
| FAPESP's process: | 09/07125-8 - Catalytic conversion of glycerol mediated by pillared clays, activated carbons and conducting polymers |
| Grantee: | Flávia Camargo Alves Figueiredo |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 09/07109-2 - Catalytic hydrogenolysis of glycerol mediated by ruthenium catalysts |
| Grantee: | Wagner Alves Carvalho |
| Support Opportunities: | Regular Research Grants |