Pyrolysis of anaerobic digested residues in the presence of catalyst-sorbent bifunctional material: Pyrolysis characteristics, kinetics and evolved gas analysis

• DOI: 10.1016/j.biortech.2022.127022
• Publication Date: 2022-03-16T16:56:36Z
• Authors: Arun K Vuppaladad...; Varsha S.S. Vuppa...; Elsa Antunes; Zenab Baig; Shazia Rehman; S. Murugavelh; Shao-Yuan Leu; Ajit K Sarmah
• Keywords: 660; Swine; 02 engineering and technology; 7. Clean energy; Heating; Kinetics; Thermogravimetry; 0202 electrical engineering, electronic engineering, information engineering; Animals; Anaerobiosis; Biomass; Pyrolysis

We investigated the potential application of anaerobically digested residues for generating bioenergy in the presence of alkali bifunctional material, sodium zirconate (Na2ZrO3, NZ) using a thermogravimetric analyzer connected to a mass spectrometer. Isoconversional kinetic models, compensation effect and master-plots method were used on data obtained under multiple heating rates (10, 15 and 20 °C min-1) to calculate the activation energy (Eα) and pre-exponential value (A) and reaction mechanism. The average Eα for blend samples C-DSW (NZ mixed with digested municipal solid waste (DSW)), and C-DSM (NZ mixed with digested swine manure (DSM)) were 172.24 and 171.63 kJ mol-1, which were much lower when compared to plain samples, DSW (202.51 kJ mol-1) and DSM (215.22 kJ mol-1). The total gas yields increased by 19.5 and 17.1% for NZ blended samples C-DSW and C-DSM, respectively. In addition, the hydrogen yields also increased by 79 and 44% for C-DSW and C-DSM, respectively.