Paul Billard

Électricité de France (France)

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R. Rezakhanlou

Électricité de France (France)

Alfredo Negro

Polytechnic University of Turin

Olivier Frantz

Polytechnic University of Turin

Laura Montanaro

Polytechnic University of Turin

B. Vandenberghe

J. Gabrel

CEA Valduc

R. Fillon

Électricité de France (France)

O. Barbier

Hôpital d'instruction des Armées Percy

Katia Weulersse

Université de Bourgogne

G. Moulin

Agence Nationale de Sécurité Sanitaire de l’Alimentation, de l’Environnement et du Travail

Cooperative Institutions

Centre National de la Recherche Scientifique

Polytechnic University of Turin

Électricité de France (France)

Laboratoire Roberval

Institut National des Sciences Appliquées de Lyon

CEA Valduc

Alstom (France)

Hôpital d'instruction des Armées Percy

Territoires, Villes, Environnement & Société

École Nationale Supérieure des Mines de Nancy

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Dictionnaire des ouvrages anonymes. Tome IV. R-Z, anonymes latins / par Ant.-Alex. Barbier

Antoine-Alexandre Barbier O. Barbier Paul Billard

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Impact of Steam-Side Oxidation on Boiler Heat Exchanger Tubes Design

Advances in materials technology for fossil power plants : (2007)

Paul Billard R. Fillon J. Gabrel B. Vandenberghe

Abstract In fossil-fired boilers, combustion-generated thermal energy transfers to the working fluid via exchanger tubes, where an internal oxide layer forms over time, reducing thermal conductivity and raising metal temperatures. This self-activating process accelerates creep damage, significantly shortening component lifespan. Boiler design codes set Maximum Allowable Stresses based on mechanical properties, primarily creep resistance, but oxidation effects are only indirectly considered through “design temperature” selection—an approach inadequate for next-generation high-performance boilers with increasingly severe steam conditions. This paper highlights the need to integrate oxidation behavior into the design of advanced heat-exchanging components by examining the impact of steam oxidation on tube lifespan, including oxide layer growth, metal loss, temperature rise, and reduced creep rupture time, with thermal flux effects illustrated through examples. It also compares the behavior of two 9-12Cr% steels: Grade 92, known for strong creep resistance, and VM12, which offers superior oxidation resistance. Additionally, it proposes a revised “design temperature” expression incorporating oxidation resistance performance indices and exchanger thermal characteristics. The study concludes by emphasizing the need for further research into oxidation kinetics, thermal properties, and oxide layer exfoliation mechanisms.

10.31399/asm.cp.am-epri-2007p0507

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High Temperature Corrosion of Superheater Tubes in Waste Incinerators and Coal-Fired Plants

Materials science forum (2004)

Katia Weulersse G. Moulin Paul Billard G. Pierotti

Superheater

High-Temperature Corrosion

10.4028/www.scientific.net/msf.461-464.973

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Corrosion of Ceramic Filters for Hot Cleaning in Thermal Power Plants

Ceramic engineering and science proceedings (2008)

Laura Montanaro Alfredo Negro Olivier Frantz Paul Billard R. Rezakhanlou

The durability of the ceramic candles used for hot cleaning of coal combustion gases are one of the fundamental requirements for the design of the filter units in pressurised fluidised bed combustion power plants. The behaviour of three commercial candle filters, two made of silicon carbide added with a clay-based binder, one made of alumina and mullite, was investigated in the presence of three different ashes, as received from thermal power plants. The study mainly dealt with the chemical interactions which could occur at the interface between the ash grains and the filter surface induced by the presence of low-softening glassy phase in both ashes and filters at high temperature (1000–1100°C). Even if a generalisation of the results is limited by the considerable difference in composition, particle size distribution, glassy phase nature and amount of the ashes, dependent on the starting coal, the three investigated filters showed a promising behaviour in view of their industrial application. Etching was essentially observed on the clay-based binder phase present in one of the SiC filters.

Mullite

Candle

10.1002/9780470294635.ch66

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Analysis of Thermal Power Plant Ashes and their Reaction with Ceramic Filters

Ceramic engineering and science proceedings (2008)

Laura Montanaro Alfredo Negro Olivier Frantz Paul Billard R. Rezakhanlou

Three ceramic candle filters, two made of SiC added with a clay-based binder, one made of alumina and mullite, and three different thermal power plant ashes were investigated. The glassy phase amount in both filters and ashes was extrapolated by the etching-dissolution curves and the chemical composition was evaluated by atomic emission spectroscopy. For studying any possible chemical interaction between the filter materials and the ashes, two tests were performed. Small cubes of the ashes were placed on the surface of filter samples and the contact areas were analysed by scanning electron microscopy and energy dispersive spectroscopy, after heat treatment at 1000° and 1100°C. For identifying any new crystalline phases, 1:1 by weight mixtures of each ash and powdered filter were uniaxially pressed, treated at the above temperatures and then analysed by X-ray diffraction. During heat treatment weight losses were measured and imputed to a reaction between crystalline phases in the pure ashes, yielding SO3 evolution. Few interaction phenomena were evidenced: sticking of the ashes to the filter surface due to the low softening temperature and etching on the clay-based binder phase present in one of the SiC filters, but independently by the contact with ash particles.

Mullite

Energy-dispersive X-ray spectroscopy

10.1002/9780470294628.ch4

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Citations (2)