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Bio-oil and char obtained from cassava rhizomes with soil conditioners by fast pyrolysis
Author(s)
Rueangsan, Koson
Kraisoda, Pakkip
Heman, Adcha
Tasarod, Homhuan
Wangkulangkool, Monchawan
Trisupakitti, Somsuk
Morris, John
Date Issued
November 1, 2021
Type
Article
Abstract
We studied the properties of the bio-oil and char from fast pyrolysis of cassava rhizomes in a free-fall reactor, catalyzed by adding various soil conditioners (or improvers) as catalysts to the reactor at 500 °C and 200 g/h feed rate. Four conditioners were evaluated - granular TPI pH11 soil conditioner, volcanic rock, TPI pelletized organic fertilizer and super dolomite - and added at 50% (w/w) of the rhizomes. Bio-oil and gas yields decreased, whereas char yields increased, yielding bio-oil 57–59%, gas 14–20% and char 23–28%. With the catalysts, the bio-oil higher heating value increased, while that of char decreased: for cassava rhizomes with volcanic rock the bio-oil high heating value increased from 19.4 to 23.6 MJ/kg, whereas rhizomes with dolomite led to an increased viscosity from 27 to 34 × 10−3 mm2/s.
Citation
Heliyon, 7(11), 2021