Pyrolysis of Napier Grass in a Fixed Bed Reactor : effect of operating conditions on product yields and characteristics

MOHAMMAD, Isah, ABAKR, Yousif, KABIR, Feroz, YUSUF, Suzana, ALSHAREEF, Ibraheem and CHIN, Soh (2015). Pyrolysis of Napier Grass in a Fixed Bed Reactor : effect of operating conditions on product yields and characteristics. BioResources, 10 (4), 6457-6478.

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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 650oC) 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 oC increased the bio-oil yield, with maximum yield of 32.26 wt% at 600 oC and a decrease in the corresponding bio-char and non-condensable gas. At 650 oC, reductions in the bio-oil and bio-char yield 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-M 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 effectively utilized.

Item Type: Article
Identification Number:
Page Range: 6457-6478
Depositing User: Feroz Kabir
Date Deposited: 17 Mar 2016 10:36
Last Modified: 18 Mar 2021 04:53

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