Pyrolysis of Napier grass in a fixed bed reactor:effect of operating conditions on product yields and characteristic

Mohammed, Isah Yakub, Abakr, Yousif Abdalla, Kazi, Feroz Kabir, Yusuf, Suzana, Alshareef, Ibraheem and Chin, Soh Aik (2015). Pyrolysis of Napier grass in a fixed bed reactor:effect of operating conditions on product yields and characteristic. BioResources, 10 (4), pp. 6457-6478.

Abstract

This study presents a report on pyrolysis of Napier grass stem in a fixed bed reactor. The effects of nitrogen flow (20 to 60 mL/min), and reaction temperature (450 to 650 degrees C) were investigated. Increasing the nitrogen flow from 20 to 30 mL/min increased the bio-oil yield and decreased both bio-char and non-condensable gas. 30 mL/min nitrogen flow resulted in optimum bio-oil yield and was used in the subsequent experiments. Reaction temperatures between 450 and 600 degrees C increased the bio-oil yield, with maximum yield of 32.26 wt% at 600 degrees C and a decrease in the corresponding bio-char and non-condensable gas. At 650 degrees C, reductions in the bio-oil and bio-char yields were recorded while the non-condensable gas increased. Water content of the bio-oil decreased with increasing reaction temperature, while density and viscosity increased. The observed pH and higher heating values were between 2.43 to 2.97, and 25.25 to 28.88 MJ/kg, respectively. GC-MS analysis revealed that the oil was made up of highly oxygenated compounds and requires upgrading. The bio-char and non-condensable gas were characterized, and the effect of reaction temperature on the properties was evaluated. Napier grass represents a good source of renewable energy when all pyrolysis products are efficiently utilized.

Publication DOI: https://doi.org/10.15376/biores.10.4.6457-6478
Divisions: Engineering & Applied Sciences
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Uncontrolled Keywords: Napier grass,pyrolysis,bio-oil,bio-char,non-condensable,characterisation,L Education
Full Text Link: http://ojs.cnr. ... ticle/view/7443
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Published Date: 2015-08-12
Authors: Mohammed, Isah Yakub
Abakr, Yousif Abdalla
Kazi, Feroz Kabir
Yusuf, Suzana
Alshareef, Ibraheem
Chin, Soh Aik

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