In the present investigation grape marc was processed in a HTC batch reactor at different operating conditions: 180, 220, and 250 °C and 1, 3, and 8 h residence time. The mass yield of the resulting phases (gaseous, liquid and solid) was measured. The hydrochar and gas compositions were evaluated through elemental analysis and gas-chromatography, respectively. The experimental results allowed to calibrate a kinetics model, based on a two-step reaction mechanism. The activation energy and pre-exponential factor of the various degradation reactions were determined by means of least square optimization versus the experimental data. A simplified dynamic analytic model was also built – based on lumped capacitance method – in order to simulate the thermal behavior of the system, using the actual temperature profile imposed by the reactor external heater. A resistance-capacitance network was used to describe the system, taking into account the thermo-physical properties of the systems (i.e. reactor shell, gaseous and liquid phases). This simplified tool supplemented with the calibrated kinetics model represents a first step in the characterization of the HTC process performance under different operative conditions.
Kinetic and thermal modeling of hydrothermal carbonization applied to grape marc / Baratieri, Marco; Basso, Daniele; Patuzzi, Francesco; Castello, Daniele; Fiori, Luca. - STAMPA. - 43(2015), pp. 505-510.
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|Titolo:||Kinetic and thermal modeling of hydrothermal carbonization applied to grape marc|
|Autori:||Baratieri, Marco; Basso, Daniele; Patuzzi, Francesco; Castello, Daniele; Fiori, Luca|
|Titolo del volume contenente il saggio:||Chemical Engineering Transactions|
|Luogo di edizione:||Milano|
|Casa editrice:||Italian Association of Chemical Engineering - AIDIC|
|Anno di pubblicazione:||2015|
|Citazione:||Kinetic and thermal modeling of hydrothermal carbonization applied to grape marc / Baratieri, Marco; Basso, Daniele; Patuzzi, Francesco; Castello, Daniele; Fiori, Luca. - STAMPA. - 43(2015), pp. 505-510.|
|Appare nelle tipologie:||02.1 Saggio su volume miscellaneo o Capitolo di libro (Essay or Book Chapter)|