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Investigating the Effect of Processing Parameters on the Products of Hydrothermal Carbonization of Corn Stover
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| Title: | Investigating the Effect of Processing Parameters on the Products of Hydrothermal Carbonization of Corn Stover |
| Authors: | Mohammed, Ibrahim Shaba Browse this author | | Na, Risu Browse this author | | Kushima, Keisuke Browse this author | | Shimizu, Naoto Browse this author →KAKEN DB |
| Keywords: | corn stover | | hydrochar | | hydrothermal liquid | | gas fraction | | bioenergy management system |
| Issue Date: | 23-Jun-2020 |
| Publisher: | MDPI |
| Journal Title: | Sustainability |
| Volume: | 12 |
| Issue: | 12 |
| Start Page: | 5100 |
| Publisher DOI: | 10.3390/su12125100 |
| Abstract: | Corn stover is an abundant and underused source of lignocellulose waste biomass that can be transformed into a high-quality energy resource using hydrothermal carbonization (HTC). This investigation has focused on the effect of processing parameters on the products of HTC-namely solid fuel or hydrochar and liquid and gas fractions. HTC was conducted in a temperature-controlled small batch reactor with corn stover and deionized water under oxygen-free conditions obtained by pressurizing the reactor headspace with nitrogen gas. The properties of the hydrochar and liquid and gas fractions were evaluated as a function of the process temperature (250-350 degrees C), residence time (30-60 min) and biomass/water ratio (0.09-0.14). Central composite design modules in a response surface methodology were used to optimize processing parameters. The maximum mass yield, energy yield and high heating value (HHV) of the hydrochar produced were 29.91% dry weight (dw), 42.38% dw and 26.03 MJ/kg, respectively. Concentrations of acetic acid and hydrogen gas were 6.93 g/L and 0.25v/v%, respectively. Experimental results after process optimization were in satisfactory agreement with the predicted HHV. The optimal HTC process parameters were determined to be 305 degrees C with a 60 min residence time and a biomass/water ratio of 0.114, yielding hydrochar with a HHV of 25.42 MJ/kg. The results confirm the feasibility of an alternative corn stover management system. |
| Rights: | https://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/79265 |
| Appears in Collections: | 北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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