Delignification of Cistus ladanifer biomass by organosolv and alkali processes
| Autor: | Maria C. Fernandes, Luísa B. Roseiro, Ana Lourenço, Helena Pereira, Francisca Morgado, Florbela Carvalheiro, Júnia Alves-Ferreira, Luís C. Duarte |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Control and Optimization analytical pyrolysis Bioconversion 020209 energy Organosolv biorefinery enzymatic hydrolysis glucan-enriched solids lignin-derived products rock-rose Energy Engineering and Power Technology 02 engineering and technology 01 natural sciences lcsh:Technology Biomass Pre-treatment Lignin complex mixtures chemistry.chemical_compound Hydrolysis 010608 biotechnology Enzymatic hydrolysis 0202 electrical engineering electronic engineering information engineering Vanillic acid Organosolv process Electrical and Electronic Engineering Cellulose Engineering (miscellaneous) Renewable Energy Sustainability and the Environment lcsh:T food and beverages chemistry Sodium hydroxide Pyrolysis Energy (miscellaneous) Nuclear chemistry |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP Energies; Volume 14; Issue 4; Pages: 1127 Energies, Vol 14, Iss 1127, p 1127 (2021) |
| Popis: | Residues of Cistus ladanifer obtained after commercial steam distillation for essential oil production were evaluated to produce cellulose enriched solids and added-value lignin-derived compounds. The delignification of extracted (CLRext) and extracted and hydrothermally pretreated biomass (CLRtreat) was studied using two organosolv processes, ethanol/water mixtures (EO), and alkali-catalyzed glycerol (AGO), and by an alkali (sodium hydroxide) process (ASP) under different reaction conditions. The phenolic composition of soluble lignin was determined by capillary zone electrophoresis and by Py-GC/MS, which was also used to establish the monomeric composition of both the delignified solids and isolated lignin. The enzymatic saccharification of the delignified solids was also evaluated. The ASP (4% NaOH, 2 h) lead to both the highest delignification and enzymatic saccharification (87% and 79%, respectively). A delignification of 76% and enzymatic hydrolysis yields of 72% were obtained for AGO (4% NaOH) while EO processes led to lower delignification (maximum lignin removal 29%). The residual lignin in the delignified solids were enriched in G- and H-units, with S-units being preferentially removed. The main phenolics present in the ASP and AGO liquors were vanillic acid and epicatechin, while gallic acid was the main phenolic in the EO liquors. The results showed that C. ladanifer residues can be a biomass source for the production of lignin-derivatives and glucan-rich solids to be further used in bioconversion processes. info:eu-repo/semantics/publishedVersion |
| Databáze: | OpenAIRE |
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