Energy conservation – A novel approach of co-combustion of paint sludge and Australian lignite by principal component analysis, response surface methodology and artificial neural network modeling

Prabhakaran, S P Sathiya; Swaminathan, G.; Joshi, Viraj V.

doi:10.1016/j.eti.2020.101061

Cited by 16 publications

(4 citation statements)

References 82 publications

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“…In green waste blends, co-combustion with lignite might be slightly inhibited (lower R max , %/min). A similar trend was also observed in the literature during coal co-combustion with sewage sludge (Prabhakaran 2020). In PAP blends with lignite, no strong synergistic effects emerged as the theoretical DTG curves are almost identical to the experimental DTG curves.…”

Section: Comparison Between Experimentalsupporting

confidence: 89%

A comprehensive experimental study of municipal solid waste (MSW) as solid biofuel and as composite solid fuel in blends with lignite: quality characteristics, environmental impact, modeling, and energy cover

Vasileiadou

Zoras

Dimoudi

2023

Energ. Ecol. Environ.

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Recently, coal power plants across Europe have been reopened. Alternative fuels are needed for energy autonomy purposes, for a smoother transition to the post-lignite era and for sustainable development. In this work, different categories of municipal solid wastes (MSW) and their blends with lignite were studied for their potential use as alternative fuels. Seventeen samples were studied using several techniques: gross calorific value (GCV), proximate analysis, ultimate analysis, ion chromatography, ash elemental analysis, thermogravimetric analysis, kinetic modeling and thermodynamic analysis. A determination of empirical chemical formulas was performed. Slagging/fouling potential was evaluated with various indices including modified indices that take into account ash production and GCV. Maximum emission factors were calculated and defined per produced MJ. Also, an environmental footprint index was developed regarding the environmental impact of solid wastes. The GCV experimental results were compared with those of twenty different empirical models. Moreover, several case studies were performed to evaluate the potential of covering the energy demands, with combustion of MSW, in Greece and Europe. The results showed that MSW as a primary/secondary fuel is an attractive solution considering the fact that it boasts better characteristics in comparison with lignite. Moreover, the environmental footprint index (EFIsw) of the MSW revealed a much smaller environmental impact. The high N content is not always translated to high emissions if NO is expressed per produced MJ (gNO/MJ). In addition, MSW can also be used as a significant contributor in covering energy demands regarding the energy recovery potential. Graphical abstract

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Section: Comparison Between Experimentalsupporting

confidence: 89%

A comprehensive experimental study of municipal solid waste (MSW) as solid biofuel and as composite solid fuel in blends with lignite: quality characteristics, environmental impact, modeling, and energy cover

Vasileiadou

Zoras

Dimoudi

2023

Energ. Ecol. Environ.

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“…The relatively higher amorphous structure for CFA was attributed to the higher amount of the earth alkaline and alkaline metals (11.1 wt.%). It was reported in the literature that some quartz (SiO 2 ), mullite (Al 2 SiO 3 ), and hematite (Fe 2 O 3 ) structures were observed through the crystallization of molten coal [50][51][52]. The relative amounts of quartz, mullite, and hematite crystals in CFA were calculated to be 4%, 10%, and 1%, respectively.…”

Section: Characterizations Of Cfa and Cbamentioning

confidence: 97%

A comparative study of coal fly and bottom ashes as sustainable electroactive vibration damping materials

Begen,

Calis-Ismetoglu,

Gumus

et al. 2023

Environmental Engineering Research

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Coal is used in most of the power and chemical plants to meet energy needs which produce various waste ashes. Reuse of these ashes as electroactive materials has great importance for sustainable development. In this study, it was detected that the main components of coal fly (CFA) and bottom ashes (CBA) were oxides of silica (SiO2), iron (Fe2O3), aluminium (Al2O3), and magnesium (MgO), besides carbon. These are well-known electrorheological (ER) active materials. The aim of this study is to reveal dielectric and electroactive vibration damping capabilities of CFA and CBA. According to the dielectric and ER flow tests carried out in insulating silicone oil (SO), the optimum concentration of particles was determined to be 35 wt.% for both ashes. Higher ER yield stress (τy = 135 Pa), higher ER efficiency (32.8), and better viscoelastic properties (τc = 128 Pa, G' = 680 kPa) under 3.0 kV mm-1 applied electric field were obtained for 35CFA/SO suspension system compared to 35CBA/SO (τy = 125 Pa, EReff = 24.0, τc = 55 Pa, G' = 260 kPa). Although it was concluded that both ashes can be upcycled to sustainable and smart vibration damping alternative materials, better performance was observed for CFA particles.

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“…The experiment was conducted at a constant air flow rate of 50 mL/min. During the process, an 8 mg sample was heated from room temperature to 900 • C at a single rate of 20 • C/min [17,18]. Table 2 displays the experimental conditions employed in the thermogravimetric analysis.…”

Section: Thermogravimetric Experimentsmentioning

confidence: 99%

Thermal Behavior Prediction of Sludge Co-Combustion with Coal: Curve Extraction and Artificial Neural Networks

Wen

Lin

et al. 2023

Processes

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Previous studies on the co-combustion of sludge and coal have not effectively utilized the characteristics of the combustion process to predict thermal behavior. Therefore, focusing on these combustion process characteristics is essential to understanding and predicting thermal behavior during the co-combustion of sludge and coal. In this paper, we use thermogravimetric analysis to study the co-combustion of coal and sludge at different temperatures (300–460 °C, 460–530 °C, and 530–600 °C). Our findings reveal that the ignition improves, but the combustion worsens with more sludge. Then, we further employ curve extraction based on temperature and image segmentation to extract the DTG (weight loss rate) curves. We successfully predicted the DTG curves for different blends using nonlinear regression and curve extraction, achieving an excellent R2 of 99.7%. Moreover, the curve extraction method predicts DTG better than artificial neural networks for two samples in terms of R2 (99.7% vs. 99.1% and 99.7% vs. 94.9%), which guides the application of co-combusting coal and sludge.

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Energy conservation – A novel approach of co-combustion of paint sludge and Australian lignite by principal component analysis, response surface methodology and artificial neural network modeling

Cited by 16 publications

References 82 publications

A comprehensive experimental study of municipal solid waste (MSW) as solid biofuel and as composite solid fuel in blends with lignite: quality characteristics, environmental impact, modeling, and energy cover

A comprehensive experimental study of municipal solid waste (MSW) as solid biofuel and as composite solid fuel in blends with lignite: quality characteristics, environmental impact, modeling, and energy cover

A comparative study of coal fly and bottom ashes as sustainable electroactive vibration damping materials

Thermal Behavior Prediction of Sludge Co-Combustion with Coal: Curve Extraction and Artificial Neural Networks

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