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Description: With the increasing interests among the industries for the use of low-cost adsorbents, researchers have been developing highly porous carbon-based materials using agricultural waste. A novel production method requires controlling the parameters for preparation of activated carbon. In this study, switchgrass was used as the feedstock to develop activated carbon via alkaline hydrothermal pre-treatment using potassium hydroxide and subsequent thermal activation. The hydrothermal carbonization was modified to study the effects of pH (5.92 and 13.25), temperature (200° and 240°C), and residence time (0.5 and 1 hour) on the surface of the hydrochar. The treated hydrochar was activated at two different activation temperatures (500° and 700°C) for 1 hour to obtain superior mesoporous and microporous activated carbon with a high specific surface area. The physicochemical properties of the hydrochars were studied using proximate and elemental analysis, Thermo-Gravimetric Analysis (TGA), and Fourier-Transform Infrared Spectroscopy (FTIR) to distinguish the specific impact of the parameters. The Transmission Electron Microscope (TEM), Scanning Electron Microscope (SEM) images, and Brunauer–Emmett–Teller (BET) analysis exemplifies the surface morphology and the adsorptive properties. The ultra-porous activated carbon is promising to have applications such as CO2 storage, capture, and utilization.

Keywords: Agricultural waste, CO2 capture, hydrothermal, activated carbon, adsorbent
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Date: 2018-07-22
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Conference name: CSBE/SCGAB 2018 Annual Conference, School of Engineering, University of Guelph, Guelph, Ontario, July 22-25 2018.
Session name: Poster Session

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Type: Text.Article
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Publication type: Technical conference
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Coverage: Canada
Language 1: en
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Rights: Canadian Society for Bioengineering
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