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

Arun K Vuppaladadiyam; Varsha S S Vuppaladadiyam; Elsa Antunes; Zenab Baig; Shazia Rehman; S Murugavelh; Shao-Yuan Leu; Ajit K Sarmah

doi:10.1016/j.biortech.2022.127022

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

Bioresour Technol. 2022 May:351:127022. doi: 10.1016/j.biortech.2022.127022. Epub 2022 Mar 16.

Authors

Arun K Vuppaladadiyam¹, Varsha S S Vuppaladadiyam¹, Elsa Antunes², Zenab Baig³, Shazia Rehman¹, S Murugavelh⁴, Shao-Yuan Leu¹, Ajit K Sarmah⁵

Affiliations

¹ Department of Civil and Environmental Engineering, Hong Kong Polytechnic University, Hong Kong, PR China.
² College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia.
³ School of Environment, Tsinghua University, Beijing 100080, PR China.
⁴ CO(2) Research and Green Technologies Centre, VIT, Vellore, Tamil Nadu 632014, India.
⁵ Department of Civil and Environmental Engineering, The Faculty of Engineering, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand. Electronic address: a.sarmah@auckland.ac.nz.

PMID: 35306136
DOI: 10.1016/j.biortech.2022.127022

Abstract

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 (E_α) and pre-exponential value (A) and reaction mechanism. The average E_α 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.

Keywords: Bifunctional material; Biomass; Catalytic pyrolysis; Digested residues; Thermogravimetric analysis.

MeSH terms

Anaerobiosis
Animals
Biomass
Heating*
Kinetics
Pyrolysis*
Swine
Thermogravimetry