Abstract
This study is focused on kinetics and product distribution from untreated empty oil palm fruit bunch (EOPFB) biomass and treated EOPFB using analytical pyrolysis combined with gas chromatograph/mass spectrometer and Fourier transform infrared spectrometer, and microwave pyrolysis. Industrial water wash led to significant reduction in ash content of EOPFB from 5.9 wt% to 0.7 wt%. Isothermal mass loss data collected in the temperature range of 400–700 °C showed that fast pyrolysis in the Pyroprobe® reactor followed diffusion-controlled kinetics with apparent activation energies of 30.4 and 39.6 kJ mol−1 for untreated and treated EOPFB, respectively. Analytical pyrolysis of untreated EOPFB resulted in high selectivity to fatty acids, while phenolics dominated the pyrolysates from treated EOPFB. The selectivities to phenolic compounds were 74% and 57% from treated and untreated EOPFB, respectively, via microwave pyrolysis. The higher heating values of bio-crude from microwave pyrolysis of untreated and treated EOPFB were 30.1 and 29.7 MJ kg−1, respectively.
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