RT info:eu-repo/semantics/conferenceObject
T1 Understanding the behavior of chitin in Subcritical and Supercritical Water in a continuous reaction system.
A1 Rodríguez Rojo, Soraya
A1 Casas González, Andrea Patricia
A1 Alonso Sánchez, Gloria Esther
AB Chitin ((1,4)-β-N-acetylglucosamine) is the second most widespread bio-polymer worldwide. Its high crystallinity and low solubility limit the exploitation of its antimicrobial, non-toxic and biodegradable properties, among others. So far, batch reactors and residence times longer than 1min with sub-and supercritical water have been tested to depolymerize chitin. In this work, we investigate the influence of temperature and residence time on chitin transformation in sub- and supercritical water (25MPa, 350 °C to 385 °C), using ultrafast continuous reactors (0.3s to 12s). Within the range studied,  chitin gasification above 30% was detected when operating at high temperature (T≥376 °C) and a long residence time (t≥5s). At these conditions, mean particle size of water-insoluble fraction was also reduced to ca. 280 nm. By-products such as glycolaldehyde, acetic acid and 5-HMF were identified in the water-soluble fraction, indicating the presence of side reactions.
SN 978-972-745-327-6
YR 2023
FD 2023
LK https://uvadoc.uva.es/handle/10324/82969
UL https://uvadoc.uva.es/handle/10324/82969
LA eng
NO Simão Pedro de Almeida Pinho y Maria Filomena Filipe Barreiro. Brangança - Portugal, 12- 15 September 2023. Editores: Ana Maria Alves Queiroz da Silva, António Manuel Coelho Lino Peres, António Manuel Esteves Ribeiro, Maria Filomena Filipe Barreiro, Maria Olga de Amorim e Sá Ferreira, Paulo Miguel Pereira de Brito, Simão Pedro de Almeida Pinho.  Instituto Politécnico de Bragança & Ordem dos Engenheiros (Portugal)
DS UVaDOC
RD 22-feb-2026