WU, Qian; BULZA, Silviu; CORCOVEANU, C.; WEISS-HORTALA, Elsa; BARNA, Radu; LOPPINET SERANI, Anne; AYMONIER, Cyril

Métadonnées

Licence d’utilisation du document

WU, Qian
Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement [RAPSODEE]

BULZA, Silviu

CORCOVEANU, C.

Langue

Communication dans un congrès

Ce document a été publié dans

13th European meeting on supercritical fluids, 13th European meeting on supercritical fluids, 2011-10-09, The Hague. 2011p. 12 p.

INTERNATIONAL SOCIETY FOR THE ADVANCEMENT OF SUPERCRITICAL FLUIDS

Résumé en anglais

• Glycerol, a main by-product of the biodiesel production, has a high valorization potential. This paper proposes a comparison of hydrogen production from glycerol using batch (5 mL and 500 mL) and continuous (100 mL) processes. The influence of different operating parameters has been studied: temperature (450°C-600°C), pressure (20-28MPa), glycerol concentration (5-20wt%), catalyst concentration (K 2 CO 3 or NaOH, 0-5 wt%), reaction time (5-120 min, batch), residence time (12 min, continuous process), stirring rate (500-1500 rpm, batch of 500ml), and heating rate (50% and 100% of heating power). • Quantitative glycerol conversion has been observed: until 99% of TOC removal by SCWG. While the amount of solid formed is insignificant, the produced gas volume reached 43 L gas/L solution (5 wt% glycerol) with a molar composition up to 60% H 2 and 30% CO 2 (atmospheric pressure). Various proportions of CH 4 , C 2 H 6 and C 2 H 4 have been observed. Catalyst contribution to the gasification yield of glycerol is relevant. • SCW conversion of glycerol, quantitative by-product in biodiesel industry, into hydrogen is a sustainable process. The yield obtained in the continuous laboratory reactor (3 mol H 2 /L of reactor/h) under homogeneous catalysis (K salts, low concentrations) recommends the process for further research and pilot development.< Réduire

Mots clés en anglais

Glycerol

K 2 CO 3

NaOH

Hydrogen

Supercritical water

Batch

Continuous reactor

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026