Novel helical screw-fluidized bed reactor for bio-oil production in slow-pyrolysis mode: A preliminary study

Qureshi, Khan Muhammad and Abnisa, Faisal and Daud, Wan Mohd Ashri Wan (2019) Novel helical screw-fluidized bed reactor for bio-oil production in slow-pyrolysis mode: A preliminary study. Journal of Analytical and Applied Pyrolysis, 142. p. 104605. ISSN 0165-2370, DOI

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Slow pyrolysis has been generally recognized as an improper mode of bio-oil production because it produces a low liquid yield of ˜30 wt.%. This research introduces a type of innovation in which the designed helical screw-fluidized bed reactor can operate in the slow-pyrolysis mode to obtain high-yielding liquids. The concept of the reactor was designed to develop the fluidization condition by using a mechanical device. Experiments were performed at the heating rate of 10 °C/min to achieve 500 °C without using any inert gases. The focus of the preliminary study was on reactor performance, particularly for a setting with helical rotation (50 rpm) and another one without rotation (0 rpm). For the setting without the influence of helical screw rotation, the obtained liquid yield was 38.4 wt.%. Then, the liquid yield was remarkably increased to 51.6 wt.% when the 50-rpm condition was applied. The liquid obtained from the 50-rpm condition contained a higher proportion of organic phase than aqueous phase. The presence of oxygen compound in the organic phase in the 50-rpm condition was lower than that in the 0-rpm condition. Apart from the ability to obtain high-yielding liquids in the slow-pyrolysis condition, the reactor also has other good features, such as low pyrolysis time, fast vapor production, non-agglomeration of particles, non-occurrence of pressure drop during process implementation, and production of good-quality byproduct char. © 2019 Elsevier B.V.

Item Type: Article
Funders: GSP-MOHE, University of Malaya for fully funding this study through the project number MO008-2015
Uncontrolled Keywords: Reactor; Slow pyrolysis; Bio-oil; Helical screw; Fluidization
Subjects: T Technology > TP Chemical technology
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 10 Feb 2020 07:57
Last Modified: 10 Feb 2020 07:57

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