Liquid-liquid equilibrium modeling using non-random two-liquid (NRTL) method for extraction of phenolic compounds from the bio-oil of rice husk pyrolysis

Dewi Selvia Fardhyanti; Haniif Prasetiawan; Norashikin Ahmad Zamanhuri; Indra Sakti Pangestu

Author(s)

Dewi Selvia Fardhyanti Departement of Chemical Engineering, Faculty of Engineering,Universitas Negeri Semarang, Gunungpati Semarang,Indonesia

Haniif Prasetiawan Departement of Chemical Engineering, Faculty of Engineering,Universitas Negeri Semarang, Gunungpati Semarang,Indonesia

Norashikin Ahmad Zamanhuri Faculty of Chemical Engineering,Universiti Teknologi MARA, Shah Alam, Selangor,Malaysia

Indra Sakti Pangestu Departement of Chemical Engineering, Faculty of Engineering,Universitas Negeri Semarang, Gunungpati Semarang,Indonesia

Abstract

Rice husk is known as an abundant biomass waste from countries that produce rice. It can be potentially utilized as an energy source through the pyrolysis process to produce bio-oil. Bio-oil is a dark-colored liquid fuel derived from biomass using pyrolysis technology, which is the thermal degradation method at a temperature between 400 and 600 ºC without the presence of air or oxygen during production. However, the bio-oil itself contains high phenolic compounds, which are corrosive and can cause damage to engines. One of the methods that can be used to remove the phenolic compounds from the bio-oil is liquid-liquid extraction. The bio-oil was extracted using methanol and chloroform solvents. The extraction process was carried out for 60 minutes while the extraction temperature varied to 30, 40, and 50 °C, and the stirring speed varied at 150, 200, and 250 rpm. The mixture was then allowed to separate into two layers, which are the extract and raffinate layers. The intermolecular interaction between solute and solvent was studied. According to the correlation between experimental data and calculated results, the NRTL equilibrium model can be used to predict the liquid-liquid equilibrium in the phenol extraction process from bio-oil pyrolysis of rice husk.

Publication Details

Page(s) 1316-1326

DOI DOI not available

Published Journal: ARPN Journal of Engineering and Applied Sciences, Volume: 20, Issue: 16, Year: 2025

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Keywords

Rice husk, Bio-oil, liquid-liquid equilibrium, thermodynamic model

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