2026-04-27T12:35:38Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/284382025-02-21T10:51:53Zcom_10324_31661com_10324_952com_10324_894com_10324_1173com_10324_931col_10324_31662col_10324_1371

Martínez, Celia M. Cantero Sposetti, Danilo Alberto Bermejo Roda, Maria Dolores Cocero Alonso, María José 2018-01-28T18:19:49Z 2018-01-28T18:19:49Z 2015 Cellulose, 2015, Volume 22, Issue 4, pp 2231–2243 http://uvadoc.uva.es/handle/10324/28438 10.1007/s10570-015-0674-3 In this work, the influence of reagent concentration on hydrolysis reactions of cellulose in supercritical water was analyzed. The hydrolysis was carried out at 400 °C and 25 MPa with reaction times between 0.07 and 1.57 s and feeding cellulose concentrations between 5 and 20 % w/w (1.5–6 % w/w at reactor inlet). Also, a flash separator was used to separate vapor in the product stream in order to increase the final concentration. The best result for sugar production (79 % w/w) was obtained working with a cellulose concentration of 5 % w/w and 0.07-s reaction time. For glycolaldehyde production, the best result (42 % w/w) was obtained with a concentration of 20 % w/w and 1.57 s. The employment of a flash separator allowed reducing the water content by 50 %. It was also observed that by increasing the cellulose concentration in the reactor up to 4 % w/w, the hydrolysis took place with a similar kinetic as that in the heterogeneous media, thus reducing the conversion rate of cellulose in supercritical water. eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Attribution-NonCommercial-NoDerivatives 4.0 International Hydrolysis of cellulose in supercritical water: reagent concentration as a selectivity factor info:eu-repo/semantics/article