SOLID WASTE FROM MACADAMIA NUTSHELL GASIFICATION: POTENTIAL USED AS ADSORBENT

Abstract

The global expansion of macadamia production leads to an increasing risk of
the by-products such as nutshell causing environmental pollution. The
combination of energyand biochar production from macadamia nutshell is a
propable solution to utilize agricultural residues and generate high-value biobased adsorbents that offer numerous applications in environmental
remediation. In this study, the obtained experimental results on the properties of
macadamia nutshell highlighted its suitability as feedstock for biomass
gasification with the relatively low moisture content and ash content of 5.62%
and 0.99%, respectively.The volatile matter content of macadamia nutshell was
found to be significant at 82.59%, and its higher calorific value was identified to
be 18.71MJ/kg. The SEM, BET analysis of the solid waste suggested that the char
surface has a relatively large porosity, the surface area is 783.04m2/g. Moreover,
the FT-IR analysis showed little functional groups retaining on the char surface.