Characteristics of Miscanthus Fuel by Wet Torrefaction on Fuel Upgrading and Gas Emission Behavior
Biomass is a solid fuel that can be used instead of coal to address the issue of greenhouse gases. Currently, biomass is used directly in combustion or via co-combustion in coal-fired power plants. However, its use is limited due to calorific value and ash problems. In this study, wet torrefaction (...
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MDPI AG
2020-05-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/10/2669 |
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| author | Jae-Hyun Park Young-Chan Choi Young-Joo Lee Hyung-Taek Kim |
| author_facet | Jae-Hyun Park Young-Chan Choi Young-Joo Lee Hyung-Taek Kim |
| author_sort | Jae-Hyun Park |
| collection | DOAJ |
| description | Biomass is a solid fuel that can be used instead of coal to address the issue of greenhouse gases. Currently, biomass is used directly in combustion or via co-combustion in coal-fired power plants. However, its use is limited due to calorific value and ash problems. In this study, wet torrefaction (WT) was carried out at various temperatures (160 °C, 180 °C, and 200 °C) and the properties of the product were evaluated. In comparison to dry torrefaction, the ash contained in biomass was extracted by an acidic solution (i.e., acetic acid) from the overreaction of the biomass. From examining the ash content of the treated WT, it was confirmed that K<sub>2</sub>O of basic ash was mainly extracted. In particular, in the case of K<sub>2</sub>O, since the main cause of combustion problems are issues such as fouling and slagging, the removed WT can be stably combusted in the boiler. Finally, the combustion and emission behaviors were evaluated by TGA-DTG and TGA-FTIR. As the fuel-N was decreased in the WT proess, the NOx in the emission gas after combustion was lower than that of raw miscanthus, and SO<sub>2</sub> showed a similar value. As a result, it was confirmed that the WT sample is an advanced fuel in terms of fuel upgrading, alkali minerals, and NOx emission compared to raw miscanthus. |
| first_indexed | 2024-03-10T19:35:34Z |
| format | Article |
| id | doaj.art-4b33d202574646bc87c17aed962f4823 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T19:35:34Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-4b33d202574646bc87c17aed962f48232023-11-20T01:42:59ZengMDPI AGEnergies1996-10732020-05-011310266910.3390/en13102669Characteristics of Miscanthus Fuel by Wet Torrefaction on Fuel Upgrading and Gas Emission BehaviorJae-Hyun Park0Young-Chan Choi1Young-Joo Lee2Hyung-Taek Kim3Division of Energy Systems Research, Graduate School, Ajou University, Wonchon-dong, Yeongtong-gu, Suwon 443-749, KoreaKorea Institute of Energy Research (KIER), 152, Gajeong-ro, Yuseong-gu, Daejeon 34129, KoreaKorea Institute of Energy Research (KIER), 152, Gajeong-ro, Yuseong-gu, Daejeon 34129, KoreaDivision of Energy Systems Research, Graduate School, Ajou University, Wonchon-dong, Yeongtong-gu, Suwon 443-749, KoreaBiomass is a solid fuel that can be used instead of coal to address the issue of greenhouse gases. Currently, biomass is used directly in combustion or via co-combustion in coal-fired power plants. However, its use is limited due to calorific value and ash problems. In this study, wet torrefaction (WT) was carried out at various temperatures (160 °C, 180 °C, and 200 °C) and the properties of the product were evaluated. In comparison to dry torrefaction, the ash contained in biomass was extracted by an acidic solution (i.e., acetic acid) from the overreaction of the biomass. From examining the ash content of the treated WT, it was confirmed that K<sub>2</sub>O of basic ash was mainly extracted. In particular, in the case of K<sub>2</sub>O, since the main cause of combustion problems are issues such as fouling and slagging, the removed WT can be stably combusted in the boiler. Finally, the combustion and emission behaviors were evaluated by TGA-DTG and TGA-FTIR. As the fuel-N was decreased in the WT proess, the NOx in the emission gas after combustion was lower than that of raw miscanthus, and SO<sub>2</sub> showed a similar value. As a result, it was confirmed that the WT sample is an advanced fuel in terms of fuel upgrading, alkali minerals, and NOx emission compared to raw miscanthus.https://www.mdpi.com/1996-1073/13/10/2669wet torrefactionmiscanthusbiomassupgrading fuelcombustion |
| spellingShingle | Jae-Hyun Park Young-Chan Choi Young-Joo Lee Hyung-Taek Kim Characteristics of Miscanthus Fuel by Wet Torrefaction on Fuel Upgrading and Gas Emission Behavior Energies wet torrefaction miscanthus biomass upgrading fuel combustion |
| title | Characteristics of Miscanthus Fuel by Wet Torrefaction on Fuel Upgrading and Gas Emission Behavior |
| title_full | Characteristics of Miscanthus Fuel by Wet Torrefaction on Fuel Upgrading and Gas Emission Behavior |
| title_fullStr | Characteristics of Miscanthus Fuel by Wet Torrefaction on Fuel Upgrading and Gas Emission Behavior |
| title_full_unstemmed | Characteristics of Miscanthus Fuel by Wet Torrefaction on Fuel Upgrading and Gas Emission Behavior |
| title_short | Characteristics of Miscanthus Fuel by Wet Torrefaction on Fuel Upgrading and Gas Emission Behavior |
| title_sort | characteristics of miscanthus fuel by wet torrefaction on fuel upgrading and gas emission behavior |
| topic | wet torrefaction miscanthus biomass upgrading fuel combustion |
| url | https://www.mdpi.com/1996-1073/13/10/2669 |
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