Evaluation of urban wastes as promising co-fuels for energy production – A TG/MS study

Vamvuka, Despina; Sfakiotakis, Stelios; Saxioni, Sevi

doi:10.1016/j.fuel.2015.01.070

Cited by 38 publications

(18 citation statements)

References 26 publications

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“…The peak temperature, T max , varies between 264 °C (sewage sludge) and 490 °C (plastic), while the maximum rate of weight loss has values between 1.2 %/min (lignite) and 8.3 %/min (textile). The results of the co-combustion of lignite with various types of solid wastes of our study are comparable with those presented in other studies [6,10,19].…”

Section: Combustion Characteristics Of the Lignite Blendssupporting

confidence: 92%

“…It is well-known that biomass residues reveal high VM contents and low FC values [11,17,18]. Several authors analysed similar samples and determined comparable results worldwide and within Greece [1,6,10,18]. Since the good quality fuels have high VM and adequate FC contents, plastic and textile solid waste samples in our study, having VM values > 75 wt.% and sunflower shells having FC content approximately 20 wt.%, are considered as those with the optimum thermal performance.…”

Section: Combustion Characteristics Of the Raw Materialsmentioning

confidence: 58%

“…These two stages of the combustion are attributed by the scholars to the volatilization of the hemicellulose and cellulose components (first stage) and the lignin decomposition (second stage) [12,22,24]. However, coal demonstrates its combustion reactions somehow in one single phase [6,11,17]. Moreover, there are some peaks in rather high temperatures (> 800 °C) for the organics and the lignite and their respective blends, which are probably attributed to the mineral transformations of the abundant inorganic matter present in these two samples.…”

Section: Combustion Characteristics Of the Lignite Blendsmentioning

confidence: 99%

“…for biodiesel production, thus, yielding several waste by-products, such as sunflower shells, which can be used for energy production [4,5]. Moreover, the heating efficiency of sewage sludge and its usefulness in a co-combustion process with other organic-rich material is confirmed by several scholars worldwide [6][7][8]. However, in Greece, it is typically utilized as an agricultural amendment.…”

Section: Introductionmentioning

confidence: 99%

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Combustion behaviour of different types of solid wastes and their blends with lignite

2018

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The combustion characteristics of blends of lignite with various organic waste materials are evaluated in this study in order to assess their potential for energy recovery. Different types of municipal solid waste (i. e. paper, plastic, textile, organic), as well as sewage sludge and agri-residues (sunflower shells) samples were collected from the Western Macedonia region, northern Greece. Mixtures of each one of them with lignite in different proportions (30-50-70 wt.%) were prepared. Proximate analysis, calorific value determination, and thermogravimetry (TGA/ DTG) were performed. Thermal parameters such as ignition temperature, total weight loss, maximum rate of weight loss, peak and burnout temperatures and burnout time were determined from the TG/DTG profiles of the raw materials and their blends. The combined utilization of proximate analysis, calorific value determination and TG/DTG method proved to be an effective method for a preliminary assessment of the energetic potential of raw solid waste "combustible" materials and their blends with lignite. The analytical results revealed that most of the blends are promising for energy recovery. Regarding the raw wastes, sunflower shells were the most reactive. A non-synergistic effect was found for the blends. Organic and sewage sludge blends revealed the lowest combustibility, which is attributed to the high content of inorganic matter and the heterogeneity of these two types of wastes.

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Section: Combustion Characteristics Of the Lignite Blendssupporting

confidence: 92%

Section: Combustion Characteristics Of the Raw Materialsmentioning

confidence: 58%

Section: Combustion Characteristics Of the Lignite Blendsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Combustion behaviour of different types of solid wastes and their blends with lignite

2018

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“…It can be seen that the wheat straw semicoke sample S 5 has higher ignition and combustion indexes compared with the oil shale semicoke sample S 1 . Also, as Table 3 displays, the said indexes of sample S 3 increase gradually when the O 2 concentration in the carrier gas rises from 5 to 21%, which agrees with the finding of Vamvuka et al [23]. Consequently, the ignition and combustion indexes of semicoke blends exhibit an increasing trend with the increase of the wheat straw content of the sample and the O 2 fraction in the carrier gas.…”

Section: Tg and Dtg Of Samplessupporting

confidence: 88%

Oxidation Characteristics of the Semicoke From the Retorting of Oil Shale and Wheat Straw Blends in Different Atmospheres

Mu¹,

Han²,

Chen³

et al. 2019

Oil Shale

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A new way of utilizing oil shale is its co-retorting with wheat straw for oil. However, the process generates a great amount of combustible solid semicoke waste. To utilize this waste effectively for heating the retorting process, the current work investigated its oxidation characteristics by employing a combined thermogravimetry-mass spectrometry (TG-MS) system, and discussed the effects of three parameters, including the wheat straw mass fraction of matrix samples, as well as different ambient gases and their O 2 volume fraction, on the oxidation of the semicoke. In the presence of O 2 , the whole oxidation process of semicoke samples mainly consists of two stages: the combustion stage (300-600 °C) in which water, CO, CO 2 and pollutants are mainly released, and the decomposition stage (600-1000 °C) in which carbonates and sulphates decompose to release CO 2 and SO 2 , respectively. In the combustion stage, increasing both the wheat straw proportion of the original sample and the O 2 volume faction can improve the combustion performance of the resulting semicoke blends. In the decomposition stage, the gasification reaction also occurs to produce CO. During the entire oxidation process, semicoke in 21% O 2 /79% CO 2 would give off less NOx and SO 2 than in air. And, SO 2 formation is also influenced by the O 2 fraction, especially above 900 °C.

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Physicochemical and compositional analyses of household solid wastes: opportunities for bioenergy production and sustainable waste management in Ethiopia

Hassen

Leta

Hussen

et al. 2023

J Mater Cycles Waste Manag

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Evaluation of urban wastes as promising co-fuels for energy production – A TG/MS study

Cited by 38 publications

References 26 publications

Combustion behaviour of different types of solid wastes and their blends with lignite

Combustion behaviour of different types of solid wastes and their blends with lignite

Oxidation Characteristics of the Semicoke From the Retorting of Oil Shale and Wheat Straw Blends in Different Atmospheres

Physicochemical and compositional analyses of household solid wastes: opportunities for bioenergy production and sustainable waste management in Ethiopia

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