Carbon Dioxide-Assisted Gasification of Fresh and Pyrolysis Residues of Macadamia F.Muell Nutshells: The Catalytic Properties of Na, K, and Co

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Residual Macadamia F.Muell nutshell gasification assisted by CO2 was studied in this work. Monometallic Co, Na, and K and bimetallic CoNa and CoK catalysts were prepared and tested in the catalytic process. The idea of this research was to try to find any synergism between already known catalytically active components and to investigate possible ways to use mixed materials. All the materials under investigation were examined by SEM-EDX and XRD. The DTA-TG of the initial fresh macadamia nutshell was presented in this work. The synergism between the Co and K components was revealed in the CO2-assisted gasification process. The found optimal catalyst was 1.5 wt%K-1.5 wt% Co/PMNS.