Mechanisms contributing to the thermal analysis of waste incineration bottom ash and quantification of different carbon species

Rocca, S; Zomeren, A. van; Costa, Giulia; Dijkstra, J.J.; Comans, R.N.J.; Lombardi, F

doi:10.1016/j.wasman.2012.11.004

Cited by 30 publications

(16 citation statements)

References 23 publications

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“…The greatest mass loss was observed in the case of sample 1. That process ran in several stages, and the whole loss on ignition-widely believed to be one of the best indicators of the incineration accuracy [20]-was 20.4 %. According to the DTG curves (Fig.…”

Section: Methodsmentioning

confidence: 99%

Thermal analysis of the by-products of waste combustion

Łach

Mikuła

Hebda

2016

J Therm Anal Calorim

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Every year, vast amounts of wastes are produced in households and in industrial facilities. Therefore, waste thermal treatment has become one of the most effective and popular methods of waste disposal and waste management. However, it inevitably leads to the creation of solid by-products, as ash and slag often containing substances which are toxic and harmful for environment. Hence, they must be further processed to be deprived of undesirable properties. In order to effectively bind or neutralize such materials, one should thoroughly know their properties. Unfortunately, they can vary greatly depending on the particular combusted material and combustion system. Yet, the detailed properties of the byproducts of waste combustion may be thoroughly examined by means of combined methods of thermal analysis. The results of the research presented in this paper concern the possibility of determining the properties and detailed characteristics of waste combustion by-products by means of the combined techniques of thermal analysis. The examination was conducted on: dust from the boiler, bottom slag and ash, and solid waste from the exhaust gas cleaning. Test samples were obtained from one of the largest hazardous waste incineration plants in Poland. The investigated materials have undergone coupled thermal analysis (mass spectrometer connected with TG and DSC), which allowed for the detailed interpretation of the processes taking place during the examination of their thermal resistance. Moreover, morphology of the waste materials were analysed by SEM. Particle size distribution was determined by means of laser diffraction. Furthermore, content of harmful substances was examined.

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Section: Methodsmentioning

confidence: 99%

Thermal analysis of the by-products of waste combustion

Łach

Mikuła

Hebda

2016

J Therm Anal Calorim

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“…However, it has been known for long that many BA or FA constituents can influence this result [71,73,[95][96][97][98]. For example, various desulphurization additives are being tested and used -e.g., calcium carbonate, dolomite, lime, and sodium bicarbonate [75,[99][100][101][102][103][104][105][106], which can significantly increase measured LOI value in ash due to possible interferences.…”

Section: Determination Of Uc Levels In Ashmentioning

confidence: 99%

“…For example, various desulphurization additives are being tested and used -e.g., calcium carbonate, dolomite, lime, and sodium bicarbonate [75,[99][100][101][102][103][104][105][106], which can significantly increase measured LOI value in ash due to possible interferences. Incomplete thermal decomposition of additives based on carbonates are then typical source of increased LOI values due to CO 2 evolution [71,73,[95][96][97][98][99][100]. Another abundant interference factor that can increase apparent UC content (derived from LOI value) is water (physically adsorbed on measured sample and/or contained in minerals).…”

Section: Determination Of Uc Levels In Ashmentioning

confidence: 99%

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Unburned carbon from coal combustion ash: An overview

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Technically exploitable mineral carbonation potential of four alkaline waste materials and effects on contaminant mobility

et al. 2021

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Mineral carbonation of alkaline wastes can contribute to the sequestration of carbon dioxide (CO2). In this study we examined the CO2 sequestration potential of four dry‐discharged waste materials using theoretical and experimental approaches. The materials encompassed biomass bottom ash, biomass fly ash, refuse‐derived fuel fly ash, and stainless‐steel slag. Their CO2 sequestration potential was determined from the acid neutralization capacity (ANC) and alternatively from the elemental composition using the Steinour equation (StE). Results were compared to experimental data from batch carbonation tests performed with pure CO2 at near atmospheric pressure over 7 days. Influence of water content on the CO2 uptake was determined in short‐term carbonation tests over 2 hr. Effects related to the hydration and the subsequent carbonation were investigated by thermogravimetric analysis and leaching tests. Depending on the material the experimental CO2 uptakes ranged from 0.99 to 2.54 mol kg−1. The ANC‐based approach either under‐ or overestimated the experimental CO2 uptake and the StE strongly overestimated the experimental CO2 uptake throughout. Except for biomass fly ash the experimental CO2 uptake within a test period of 2 hr depended on the moisture content. Upon carbonation the leachate pH decreased and amphoteric trace elements tended to be immobilized. In contrast to this, the mobility of oxyanions increased by two orders of magnitude. Our results suggest that for the design of CO2 sequestration strategies experimental investigations of the CO2 uptake are preferable to indirect estimates. When using waste materials for CO2 sequestration, effects on contaminant mobility must be considered since these determine disposal costs. © 2021 The Authors. Greenhouse Gases: Science and Technology published by Society of Chemical Industry and John Wiley & Sons, Ltd.

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Mechanisms contributing to the thermal analysis of waste incineration bottom ash and quantification of different carbon species

Cited by 30 publications

References 23 publications

Thermal analysis of the by-products of waste combustion

Thermal analysis of the by-products of waste combustion

Unburned carbon from coal combustion ash: An overview

Technically exploitable mineral carbonation potential of four alkaline waste materials and effects on contaminant mobility

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