The Role of Chloride in the Corrosion Caused by Flue Gases and Their Deposits

Cutler, A. J. B.; Halstead, W. D.; Laxton, J. W.; Stevens, C. G.

doi:10.1115/1.3445580

Cited by 10 publications

(3 citation statements)

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“…In high-temperature flue gas, chlorine exists in the forms of gaseous Cl 2 , HCl and alkali chlorides. HCl can react with metals and their oxides through the following means: , where MO represents a metal oxide.…”

Section: Overview Of Corrosion Mechanism Of Alloys In Flue Gas Systemsmentioning

confidence: 99%

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Corrosion Mechanisms and Materials Selection for the Construction of Flue Gas Component in Advanced Heat and Power Systems

Zeng

Hughes

et al. 2017

Ind. Eng. Chem. Res.

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With the desire for a clean living environment and the increasing demands for cost competitive energy supply, advanced fuel combustion technologies have been proposed and are being developed. The deployment of these technologies has been hindered by unanticipated corrosion damage within core components (such as boilers and flue gas components) at pilotscale demonstration plants. To deal with such materials technology challenges, studies have been carried out, but there is still substantial R&D required to meet the emerging industrial demands. A comprehensive review of open database information regarding the corrosion of flue gas systems in existing combustion plants was therefore conducted in this review. It is anticipated that this information will provide a basis for addressing knowledge gaps in materials technologies and advancing the mechanistic understanding of how alloys corrode in flue gas operating environments. Corrosion modes, the effects of aggressive agents (including CO 2 , HCl, SO x , and NO x ) in flue gas mixtures, and the performance of candidate metallic materials in typical combustion systems are systemically reviewed and discussed. From corrosion and economic points of view, F/M steels (P91 and P92), austenitic stainless steels (SS317, 254SMO, and 654SMO etc.), and duplex steels (2205 and 2507) are likely to be major candidates for the construction of future flue gas systems in the fossil fuel powered industries. Ni-based alloys, particularly Alloy C-276 and Alloy C-22, are more applicable for flue gas components in biomass and waste-to-energy energy combustion systems.

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Section: Overview Of Corrosion Mechanism Of Alloys In Flue Gas Systemsmentioning

confidence: 99%

“…In the presence of excess O 2 , HCl can be further oxidized into Cl 2 : with the following accompanying reactions that enhance corrosion: , Alkali chlorides are thermodynamically unstable and can react with metal oxides in the presence of O 2 : , where A represents Na or K.…”

Section: Overview Of Corrosion Mechanism Of Alloys In Flue Gas Systemsmentioning

confidence: 99%

Corrosion Mechanisms and Materials Selection for the Construction of Flue Gas Component in Advanced Heat and Power Systems

Zeng

Hughes

et al. 2017

Ind. Eng. Chem. Res.

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“…For effi cient use of such raw materials, it is necessary not only to know the detailed composition of fuel minerals, but also to understand the mechanism and all stages of sticking, slagging and corrosion that arise during its combustion. That is why many original and review studies are devoted to complex mechanisms for the formation of slag deposits during utilization of diff erent types of problem raw materials [8][9][10].…”

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confidence: 99%

Phenomena and mechanism of slagging and corrosion in energy use of coal with a high content of salts

Shendrik¹,

Dunayevska²,

Fateyev³

et al. 2022

Nauk. visn. nat. hirn. univ.

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Purpose. Determination of the main mechanisms of slagging and corrosion of heating surfaces when using coal or other raw materials with a high content of alkali and alkaline earth metals. Experimental determination of mineral phases of ash residues of burning composite raw materials with the participation of salty coal and the influence of component composition on the formation of refractory compounds. Methodology. Critical analysis and generalization of achievements in the developed theories of slagging and corrosion of surfaces during the combustion of problematic carbon raw materials (salty coal, biomass, some wastes, etc.). Determination of the main approaches to the problem of using coal with a high pollution factor. Selection of objects of experimental study on composite raw materials, including coal of different degrees of metamorphism and salinity. Identification of minerals of ash residues of individual fuels and their blends using X-ray phase analysis (X-ray diffraction). Semi-quantitative phase analysis of diffractograms was performed using MATCH! software. Findings. Modern views on the causes of slagging and corrosion processes during the combustion of fuel with a high salt content are highlighted. It has been determined that the process of intensive slagging is associated with a certain ratio of sodium, calcium and iron compounds. The composition and features of the mineral phases of ash residues of composite fuel with the participation of salty coal are experimentally established. The influence of the content of components on the formation of certain mineral phases of mixed ash was determined. Originality. For the first time, the prospects of using two-component blended fuel with the participation of Ukrainian salty coal have been studied. The analysis of minerals in ash residues of salty coal and its blends was carried out. It has been determined that the main part of Na in ash of salty coal of the Bohdanivske deposit in the Northern Donbas is in the form of sulfates and silicates. For the first time, the composition and ways of formation of new refractory mineral compounds in the ash formed during the combustion of composite fuel from coal of different metamorphism and salinity have been established. Practical value. Based on the analysis of literary sources and conducted studies, the dependence of the ash composition on the minerals of the initial fuel and on the ratio of various components in the blends was determined. The proposed approach has a predictive power, as it allows predicting the formation of the main refractory ash minerals. The expediency and prospects of involving salty coal in the fuel base of Ukraine as a component of blended fuels are shown.

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Hot Corrosion

김규영¹

2018

High Temperature Corrosion

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The Role of Chloride in the Corrosion Caused by Flue Gases and Their Deposits

Cited by 10 publications

References 0 publications

Corrosion Mechanisms and Materials Selection for the Construction of Flue Gas Component in Advanced Heat and Power Systems

Corrosion Mechanisms and Materials Selection for the Construction of Flue Gas Component in Advanced Heat and Power Systems

Phenomena and mechanism of slagging and corrosion in energy use of coal with a high content of salts

Hot Corrosion

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