Characterization of Microwave and Conventional Heating on the Pyrolysis of Pistachio Shells for the Adsorption of Methylene Blue and Iodine |
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Authors: | Orhan Baytar Ömer Şahin Selman Ağrak |
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Institution: | Faculty of Engineering and Architecture, Siirt University, Siirt, Turkey |
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Abstract: | The production of activated carbon was investigated using the sequential combination of microwave and conventional heating of pistachio shells as the raw precursor with zinc chloride. Several techniques such as thermogravimetric and differential thermal analyses, infrared spectroscopy, scanning electron microscopy, and specific surface area analyses were performed to characterize the samples. The highest specific surface area value for the activated carbon prepared at a microwave power of 200?W with microwave time of 20?min, and flow rate of 50?mL?min?1 was 1468?m2?g?1. The methylene blue and iodine adsorption capacities were 331 and 1276?mg?g?1, respectively. The results were compared to those obtained using physical and chemical activation methods and showed that the sequential combination of microwave and conventional heating reasonably influenced the micropore surface area of the samples as well as the specific surface area. |
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Keywords: | Activated carbon conventional heating infrared spectroscopy microwave pistachio shell pyrolysis scanning electron microscopy |
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