Bio-Oil Production from Pineapple by Microwave Pyrolysis

Abstract

This research concerns bio-oil production from agricultural waste after the harvesting of pineapples by microwave pyrolysis. The objective of this study was to study the process of microwave pyrolysis to determine the optimum reaction temperature and bio-oil content production by bio-oil processes and compounds, including ethyl acetate (EtOAc) as a microwave absorber. From the test, comparisons could be drawn when the wattage was high compared to when the wattage was low, so for pineapple corks, pineapple leaves, and pineapple plants by wattage and time as 600W/6min, 450W/6min, and 450W/8min, the bio-oil content was 29.6%, 32%, and 36.8%, while the percentages were 14.4%, 21.6%, and 44.8% when the wattage used was 100W/16 min, 100W/20min, and 200W/16min, respectively. Bio-oil obtained from pineapple corks, pineapple leaves, and pineapple stems was obtained by using a microwave pyrolysis process, and the compounds were analyzed using the GC-MS method. Groups of compounds such as acid, ester, ketone, aldehyde, phenol, benzene, and others were found, with percentages given as follows: Ketone (85.54%), phenol (63.60%), aldehyde (60.92%), and ester (56.98%). This group of compounds was found to be useful to expand the results in the food industry, as chemicals and precursors.