| Texto completo | |
| Autor(es): |
de Oliveira, Eliane M.
[1]
;
da Costa, Romarly F.
[2]
;
Sanchez, Sergio d'A.
[3]
;
Natalense, Alexandra P. P.
[1]
;
Bettega, Marcio H. F.
[3]
;
Lima, Marco A. P.
[4, 1]
;
Varella, Marcio T. do N.
[5]
Número total de Autores: 7
|
| Afiliação do(s) autor(es): | [1] CTBE CNPEM, Lab Nacl Ciencia & Tecnol Bioetanol, BR-13083970 Campinas, SP - Brazil
[2] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210170 Sao Paulo - Brazil
[3] Univ Fed Parana, Dept Fis, BR-81531990 Curitiba, Parana - Brazil
[4] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil
[5] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil
Número total de Afiliações: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Physical Chemistry Chemical Physics; v. 15, n. 5, p. 1682-1689, 2013. |
| Citações Web of Science: | 37 |
| Resumo | |
We report elastic integral, differential and momentum transfer cross sections for low-energy electron scattering by the cellulose components beta-D-glucose and cellobiose (beta(1 -> 4) linked glucose dimer), and the hemicellulose component beta-D-xylose. For comparison with the b forms, we also obtain results for the amylose subunits alpha-D-glucose and maltose (alpha(1 -> 4) linked glucose dimer). The integral cross sections show double peaked broad structures between 8 eV and 20 eV similar to previously reported results for tetrahydrofuran and 2-deoxyribose, suggesting a general feature of molecules containing furanose and pyranose rings. These broad structures would reflect OH, CO and/or CC sigma{*} resonances, where inspection of low-lying virtual orbitals suggests significant contribution from sigma(OH){*} anion states. Though we do not examine dissociation pathways, these anion states could play a role in dissociative electron attachment mechanisms, in case they were coupled to the long-lived pi{*} anions found in lignin subunits {[}de Oliveira et al., Phys. Rev. A, 2012, 86, 020701(R)]. Altogether, the resonance spectra of lignin, cellulose and hemicellulose components establish a physical-chemical basis for electron-induced biomass pretreatment that could be applied to biofuel production. (AU) | |
| Processo FAPESP: | 08/58034-0 - Processing of sugarcane cellulose employing atmospheric pressure plasmas |
| Beneficiário: | Marco Aurelio Pinheiro Lima |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa BIOEN - Temático |