Production and characterization of hybrid coal using sugar impurities extracted from pitch pine

Lee, Young‐Joo; Namkung, Hueon; Park, Ju-Hyoung; Song, Gyu-Seob; Park, Se-Joon; Kim, Joeng-Geun; Choi, Jongwon; Jeon, Chung-Hwan; Choi, Young-Chan

doi:10.1016/j.applthermaleng.2018.09.024

Cited by 4 publications

(2 citation statements)

References 58 publications

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“…Coal has been a major source of electricity for many decades. However, as air pollutants such as carbon dioxide (CO 2 ) and particulate matter (PM), which are generated from coal burning, have become a social issue, the proportion of coal is gradually decreasing [1,2]. In Korea, the Renewable Portfolio Standard (RPS) has been used since 2012, and plants with more than 500 MW of power are required to cover a certain percentage of the output with renewable energy.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Miscanthus Fuel by Wet Torrefaction on Fuel Upgrading and Gas Emission Behavior

et al. 2020

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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 K2O of basic ash was mainly extracted. In particular, in the case of K2O, 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 SO2 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.

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Section: Introductionmentioning

confidence: 99%

Characteristics of Miscanthus Fuel by Wet Torrefaction on Fuel Upgrading and Gas Emission Behavior

et al. 2020

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“…These results are in good agreement with those of a previous study. According to Lee [41] and Park [38], biomass-impregnated fuels improve combustion responsiveness and reduce UBC emissions. Therefore, HSF with lignin would be beneficial for application in power plants from an environmental perspective in terms of particulate matter emission reduction.…”

Section: Air Pollutants Emissions Of Hsfmentioning

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Two-in-One Fuel Synthetic Bioethanol-Lignin from Lignocellulose with Sewage Sludge and Its Air Pollutants Reduction Effects

et al. 2019

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Developing effective, economical, and environmentally sound approaches for sewage sludge management remains an important global issue. In this paper, we propose a bioethanol-lignin (nonfood biomass)-based sewage sludge upgrading process for enhancing the heating value and reducing air pollutants of hybrid sewage sludge fuel (HSF) for the effective management of sewage sludge. Sewage sludge paste with the lignin-CaO solution implies drying at 105 °C accompanied by torrefaction at 250 °C. During torrefaction, moisture and partly volatile matter begin to evaporate, and are almost vaporized out to the surface. In this study, the proposed process enhances the net caloric value (NCV) to 37%. The lignin-embedded HSF shows a two-in-one combustion peak regardless of the mixing ratio, resulting in a 70% reduction of unburned carbon (UBC) emissions, which is one of the particular matter (PM) sources of combustion flue gas. Other air pollutants, such as CO, hydrocarbon, NOx, and SOx, were also reduced by the proposed process. In particular, SOx emission remained at ~1 ppm (average value) regardless of the sulfur content of the fuel.

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Higher heating value prediction of hydrochar from sugarcane leaf and giant leucaena wood during hydrothermal carbonization process

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Nualyai²,

Kraithong³

et al. 2022

Journal of Environmental Chemical Engineering

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Production and characterization of hybrid coal using sugar impurities extracted from pitch pine

Cited by 4 publications

References 58 publications

Characteristics of Miscanthus Fuel by Wet Torrefaction on Fuel Upgrading and Gas Emission Behavior

Characteristics of Miscanthus Fuel by Wet Torrefaction on Fuel Upgrading and Gas Emission Behavior

Two-in-One Fuel Synthetic Bioethanol-Lignin from Lignocellulose with Sewage Sludge and Its Air Pollutants Reduction Effects

Higher heating value prediction of hydrochar from sugarcane leaf and giant leucaena wood during hydrothermal carbonization process

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