| Texto completo | |
| Autor(es): |
Aguiar, Leandro G.
[1]
;
Godoy, William M.
[1]
;
Napolis, Leonardo
[1]
;
Faria, V, Rui P.
;
Rodrigues, Alirio E.
[2]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Dept Engn Quim, Escola Engn Lorena, BR-12602810 Lorena, SP - Brazil
[2] Faria, Rui P., V, Univ Porto, LSRE Fac Engn, P-4200456 Porto - Portugal
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Industrial & Engineering Chemistry Research; v. 60, n. 17, p. 6101-6110, MAY 5 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
Two mathematical models were coupled to quantitatively assess the effect of cross-link density on the catalytic activity of sulfonated styrene-divinylbenzene (DVB) resins: (I) a copolymerization model comprised of the mass balances of species and sequences, which is used to quantify inaccessible catalytic sites, and (II) a second-order pseudohomogeneous kinetic model to describe the catalyzed reactions. The fraction of inaccessible sites ranged from 10% to 72% of the total sites for resins with 4% and 20% DVB, respectively. It was found that chain segments with six or less monomer units between cross-links contain inaccessible sites for the catalyzed reactions studied herein. The mathematical approach was validated with 53 catalysis experiments from the literature and provided good agreements. A linear correlation for the fraction of inaccessible sites as a function of sequences distribution was proposed and validated, providing R-2 = 0.992. These results can represent a valuable tool to improve the performance of styrene-DVB-based catalysts. (AU) | |
| Processo FAPESP: | 17/26985-4 - Conversão do glicerol catalisada por estireno-co-dimetacrilato sulfonado: experimentos e modelagem matemática |
| Beneficiário: | Leandro Gonçalves de Aguiar |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |