Mineralogical and Chemical Composition of CFB Fly Ash Derived From Co-Combustion of Xylite and Biomass

Koukouzas, Nikolaos; Hämäläinen, Jouni; Papanikolaou, Dimitra; Tourunen, Antti; Jäntti, Timo

doi:10.12681/bgsg.16733

Cited by 5 publications

(5 citation statements)

References 8 publications

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“…Research has shown that biochar can adsorb organic substrates, phosphate, nitrate, nitrite, ammonium, metals and carbon dioxide (Bagreev et al, 2001). According to Koukouzas et al (2007) DeLuca et al, 2006). Le Leuch and Bandosz (2007) showed that the sorption of ammonium by biochar immobilizes the ammonium concentration in soil thus reducing the volatilization of ammonium to ammonia under alkaline conditions and during temperature changes within the soil.…”

Section: Nutrient Retentionmentioning

confidence: 99%

The challenges of anaerobic digestion and the role of biochar in optimizing anaerobic digestion

et al. 2017

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Biochar, like most other adsorbents, is a carbonaceous material, which is formed from the combustion of plant materials, in low-zero oxygen conditions and results in a material, which has the capacity to sorb chemicals onto its surfaces. Currently, research is being carried out to investigate the relevance of biochar in improving the soil ecosystem, digestate quality and most recently the anaerobic digestion process. Anaerobic digestion (AD) of organic substrates provides both a sustainable source of energy and a digestate with the potential to enhance plant growth and soil health. In order to ensure that these benefits are realised, the anaerobic digestion system must be optimized for process stability and high nutrient retention capacity in the digestate produced. Substrate-induced inhibition is a major issue, which can disrupt the stable functioning of the AD system reducing microbial breakdown of the organic waste and formation of methane, which in turn reduces energy output. Likewise, the spreading of digestate on land can often result in nutrient loss, surface runoff and leaching. This review will examine substrate inhibition and their impact on anaerobic digestion, nutrient leaching and their environmental implications, the properties and functionality of biochar material in counteracting these challenges.

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Section: Nutrient Retentionmentioning

confidence: 99%

The challenges of anaerobic digestion and the role of biochar in optimizing anaerobic digestion

et al. 2017

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“…All samples showed the presence of quartz. According to N. Koukouzas et al (2007), the ash from bituminous coal contains high amounts of silicon dioxide. Besides that, all samples show the present of hematite (Fe 2 O 3 ), accompanied by anhydrite, due to the reactions between pyrite sulfur and calcite [7].…”

Section: Resultsmentioning

confidence: 99%

Characteristics of bituminous coal, sub-bituminous coal and bottom ash from a coal-fired power plant

Mohamad

Hidayu

Sherif

et al. 2013

2013 IEEE Business Engineering and Industrial Applications Colloquium (BEIAC)

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In this study, the characterization of bituminous coal, sub-bituminous coal and bottom ash from a coal fired power plant was performed. Moisture content, loss of ignition and heat of combustion for the coals and bottom ash were determined. The results show that sub-bituminous coal has high percentage of moisture content and loss of ignition with 18% and 80.49% respectively. Loss of ignition indicates the level of carbon content in the sample. The heat of combustion for bituminous coal exhibits the highest average value with 26898 J/g. The FTIR patterns show chemical bonding in the coals and bottom ash. Bottom ash has a broad peak at 1378 cm -1 indicating the presence of N=O functional group. The X-ray Diffraction study confirms the presence of mineral constituents such as quartz, pyrite and hematite in bituminous coal, sub-bituminous coal and bottom ash.

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“…Nevertheless, the vast majority of NW Greece fly ashes are classified as Class-C. Fly ashes from the Almyros basin are poor in SiO 2 , Al 2 O 3 and Fe 2 O 3 and rich in CaO contents, whereas their plots lie closer or within the Class-C field (Figure 2b; [28]).…”

Section: Classification and Geochemical Features Of Fly Ashesmentioning

confidence: 99%

Physicochemical Properties and REE Distribution of the Northwest and Central Greece Coal Deposits: A Review

Koukouzas

Kalaitzidis

Koutsovitis

et al. 2022

International Conference on Raw Materials and Circular Economy

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This review presents a mineralogical and physicochemical comparison of coal seams located in the regions of Northwest and Central Greece. The comparison extends to the fly ash derivatives from the coal combustion for energy production, in the cases where data are available. Coal occurrences from Northwest Greece tend to exhibit higher content of rare earth elements (REE) compared to those of Central Greece. Moreover, fly ash products show similar trends in Light-REE compared to their coal parent rocks. The observed REE distribution seems to be correlated with the occurrence of specific minerals such as allanite, monazite, as well as with Fe-contents.

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Mineralogical and Chemical Composition of CFB Fly Ash Derived From Co-Combustion of Xylite and Biomass

Cited by 5 publications

References 8 publications

The challenges of anaerobic digestion and the role of biochar in optimizing anaerobic digestion

The challenges of anaerobic digestion and the role of biochar in optimizing anaerobic digestion

Characteristics of bituminous coal, sub-bituminous coal and bottom ash from a coal-fired power plant

Physicochemical Properties and REE Distribution of the Northwest and Central Greece Coal Deposits: A Review

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