RT info:eu-repo/semantics/article
T1 A green desuperheater for an energetic efficient alternative to the decompression valve in biomass supercritical water ultrafast hydrolysis process
A1 Cocero Alonso, María José
A1 Vaquerizo Martín, Luis
K1 Biomasa
K1 Medio hidrotérmico
K1 Turbina de agua
AB The supercritical water hydrolysis (SCWH) of biomass (P = 250 bara & T = 400 °C) allows directly obtaining sugars, which are high value products in the chemical industry, in reaction times lower than 0.2 s. The process is characterized by the high selectivity values which can be obtained controlling the reaction time. Reaction kinetics show that glucose degradation is only retarded at temperatures below 250 °C. Therefore, in the SCWH process, degradation control is achieved expanding the hydrolysis stream in a valve which instantaneously cools down the products. Although the selectivity values obtained are greater than 96%, the pressure is wasted on the valve expansion decreasing the global energetic efficiency of the process. In this paper a desuperheater designed in CFD which mixes the hydrolysis product with pressurized cooling water is presented. The temperature of the hydrolysis stream decreases below 250 °C in cooling times lower than 20 ms maintaining the selectivity value over 93%. Furthermore, the pressure remains at 250 bara increasing the global energetic efficiency of the process.
PB Elsevier
YR 2017
FD 2017
LK http://uvadoc.uva.es/handle/10324/28386
UL http://uvadoc.uva.es/handle/10324/28386
LA eng
NO The Journal of Supercritical Fluids, 2017 (in press)
NO Producción Científica
DS UVaDOC
RD 25-nov-2024