EUBCE 2024 - Maira ALVES FORTUNATO - Improved Rock-Eval® Thermal Analysis Method to Study Carbon Content and Stability of Organic Residual Biomass Products

Improved Rock-Eval® Thermal Analysis Method to Study Carbon Content and Stability of Organic Residual Biomass Products

Short Introductive summary

In this work, we propose to use Rock-Eval® (RE) thermal analysis to evaluate the proportion of stable and labile C of biomass ORP such as composts, digestates and biochar. An improved RE method to characterize the C quantity and quality of ORP is described, and issues and recommendations are presented. This method was applied to a large set of ORPs: raw, slightly altered or altered by thermal or biological activities. One advantage RE method is its ability to screen a large number of soil samples in a shorter time (~1h30) than conventional methods. For ORPs, the method requires only 2 mg of samples without any pretreatment. In this work, the RE results were systematically compared to elementary analysis and the results are consistent which gives support to conclude that it is appropriate to quantify SOC content. The relationship between RE parameters and IROC% was improved. Finally, some specific RE parameters provide further inputs on the presence of plastics as detected in some of the biowaste samples studied in this work. In conclusion, this paper describes a new RE method for the carbon characterization of ORPs and provides new valuable insights into their agronomic quality.

M. Alves Fortunato, IFP Energies nouvelles, Rueil-Malmaison, FRANCE
I. Kowalewski, IFP Energies nouvelles, Rueil-Malmaison, FRANCE
M. Wei, IFP Energies nouvelles, Toulouse, FRANCE
R. Béghin, Ecole d’Ingénieur de Purpan, Toulouse, FRANCE
J. Scheiner, Ecole d’Ingénieur de Purpanuvelles, Toulouse, FRANCE
D. Sebag, IFP Energies nouvelles, Rueil-Malmaison, FRANCE