Sequential Combination of Acid and Base for Conversion of Cellulose

Autor:	Yaw D. Yeboah, Ungkana Wongsiriwan, Yu Noda, Chunshan Song, Pattarapan Prasassarakich
Rok vydání:	2012
Předmět:	chemistry.chemical_classification Tetramethylammonium hydroxide Depolymerization General Chemical Engineering Oxalic acid Energy Engineering and Power Technology chemistry.chemical_compound Hydrolysis Fuel Technology Monomer chemistry Magic angle spinning Organic chemistry Cellulose Organic acid
Zdroj:	Energy & Fuels. 26:2376-2385
ISSN:	1520-5029 0887-0624
Popis:	Depolymerization of cellulose is a significant part of the challenge in converting lignocellulosic biomass to valuable products such as monomeric sugars. Aiming to develop a new approach for efficient depolymerization of cellulose, we explored a sequential combination of organic acid (oxalic acid, OA) and base (tetramethylammonium hydroxide, TMAH). In hydrolysis reactions of cellulose at 150 °C, we demonstrated the enhancing effect of a sequential combination on its conversion. In two-step experiments, the highest conversion (73.0%) was achieved when the reaction with acid was followed by that with base (OA-TMAH sequence), which is greater than the prolonged treatment with either acid or base alone. In the residue after the reaction with OA, a more disordered, amorphous-like structure was present compared to raw cellulose and the sample after that with TMAH alone, as evidenced by 13C cross-polarization magic angle spinning nuclear magnetic resonance (CPMAS NMR) and powder X-ray diffraction (XRD) measureme...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1a3915971003dd4abcd64cc5a4d19235 https://doi.org/10.1021/ef300041e Zobrazit plný text záznamu