| Texto completo | |
| Autor(es): |
Gomes, Gustavo R.
;
Wang, Yunxuan
;
Min, Haehyun
;
Yoo, Chang Geun
;
Meng, Xianzhi
;
Pu, Yunqiao
;
Driemeier, Carlos
;
Ragauskas, Arthur
Número total de Autores: 8
|
| Tipo de documento: | Artigo Científico |
| Fonte: | CHEMICAL ENGINEERING JOURNAL; v. 526, p. 11-pg., 2025-12-15. |
| Resumo | |
Converting lignin-rich residues into hydrocarbons creates unique opportunities by transforming an abundant renewable resource into molecules highly needed to provide renewable fuels and chemicals for the global economy. This work investigates the utilization of enzymatic hydrolysis residue (EHR), a lignin-rich solid generated in the nascent cellulosic ethanol industry, to produce hydrocarbons within and near the jet-fuel range. Experiments were conducted with switchgrass submitted to hydrothermal pretreatment and enzymatic hydrolysis of carbohydrates. Lignin in the native switchgrass and EHR was characterized using nuclear magnetic resonance and gel permeation chromatography, revealing that EHR lignin presents a condensed structure and lower molecular weight than native lignin. The transformation of EHR into hydrocarbons was investigated by hydrodeoxygenation (HDO) in ethanol with a copper-doped porous metal oxide (CuPMO) catalyst. Two pathways were investigated: (i) one-pot HDO and (ii) pyrolysis of EHR followed by HDO of the pyrolysis oil. One-pot HDO presented up to 18 % yield (300 degrees C; 8 h; 100 % CuPMO), while HDO upgrading of pyrolysis oil reached up to 89 % yield (250 degrees C, 1 h, 10 % CuPMO, not accounting for the pyrolysis yield). Selected conditions of HDO upgrading resulted in oils with high hydrocarbon content (up to 70 %). These findings show that the CuPMO/ ethanol system can transform residual lignins into valuable molecules for fuels and chemicals. (AU) | |
| Processo FAPESP: | 14/50884-5 - INCT 2014: Instituto Nacional de Ciência e Tecnologia do Bioetanol |
| Beneficiário: | Marcos Silveira Buckeridge |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 21/13455-2 - Despolimerização de ligninas residuais do etanol celulósico: em direção a uma nova plataforma para produtos químicos renováveis |
| Beneficiário: | Gustavo Rodrigues Gomes |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 23/09157-1 - Transformando ligninas residuais do etanol celulósico em hidrocarbonetos para biocombustíveis sustentáveis de aviação |
| Beneficiário: | Gustavo Rodrigues Gomes |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |