Resource Utilization of Biomass Waste via Thermal Treatment
Date Issued
2007
Date
2007
Author(s)
Liao, Jui-Ke
Abstract
Bioenergy is a renewable energy which is friendly towards the earth. In general energy conversion process of vegetal biomass, huge amount of waste was produced though still had reusable worth. In this study, application of thermal process for the utilization of sunflower seed residue was investigate. Multi-stage temperature program was employed. Effects of controlling parameters such as heating rate, goal temperature, holding time, sample size, relative humidity of the system, carrier gas, and flow rate were examined. The instantaneous decomposition rate of sunflower residue reaches its maximum at about 375 ℃. Compared with those high-temperature reaction, to hold the furnace stay at lower temperature such as 375 ℃ will not only consume less energy but also keep the reactants in a state with maximum reaction rate.Combustible species in the products of pyrolysis of sunflower residue arise apparently after 300 ℃. The major product is methane, its content reaches up to 95.8% at 340 ℃when the multi-stage temperature program was as follows: first, sunflower residue was heated from 25 to 105 ℃ and hold at 105 ℃ for 2 h; then the temperature was raised to 800 ℃ with heating rate of 20 ℃/min. The carrier gas was helium, with flow rate of 50 mL/min. As thermal process goes on, the proportion of combustible long chain species in gaseous product increase. The high heating value of gaseous hydrocarbon products of 53.9 kJ/g close to 60.8 kJ/g of natural gas and the total yield of methane reaches 10.94 wt.% (relative to the initial input sample). The total gas yield was elevated when the relative humidity (RH) of the system is increased, it attained to 55.86% when RH = 84.9%.
Subjects
sunflower
residue
bioenergy
thermal treatment
pyrolysis
SDGs
Type
thesis
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