Abstract
This paper investigates the effects of three parameters (reaction temperature, feedstock particle size and nitrogen flow rate) towards the solid (char) yield from the pyrolysis of bamboo. Three-factor, three-level Taguchi’s L9 Orthogonal Array was used as the experimental design. The char yield at reaction temperatures of 300-500°C, feedstock particle size of 100-1000 μm, and nitrogen flow rate of 100-300 ml min−1 were investigated. The maximum solid yield was predicted based on signal-to-noise (S/N) ratio and was found to be at 300°C reaction temperature, 1000 μm feedstock particle size and 100 ml min−1 of nitrogen flow rate. Confirmation runs were conducted to validate the prediction at corresponding predicted conditions.
Highlights
Pyrolysis is a thermal conversion process of carbonaceous materials at elevated temperatures in the absence of oxygen
This study investigated the effects of reaction temperature, feedstock particle size and nitrogen flow rate on the pyrolysis of bamboo with emphasis on the biochar yield
A larger delta means a larger impact on solid yield due to change in factor, indicating that the reaction temperature has the highest influence on solid yield
Summary
Pyrolysis is a thermal conversion process of carbonaceous materials at elevated temperatures in the absence of oxygen. Most pyrolysis products can be utilized as fuel for heat and power and as raw materials for chemical syntheses, making the process very attractive [3]. Biochar is the solid product of pyrolysis and can be utilized in various applications ranging from heat and power generation to soil amendment [6,7,8]. Slow pyrolysis process with long residence time and slow heating rate is commonly used to produce biochar at a maximized fraction, in the expense of liquid and gaseous products [9, 10]. Taguchi’s L9 Orthogonal Array method, and the optimum reaction condition that produces maximum solid yield was predicted and compared with the experimental findings
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