ABSTRACT Combustion of coal in air leads to a gaseous product stream (flue gas) that mainly contains nitrogen (N2), carbon dioxide (CO2), water vapor, and small quantities of many other gases such as sulphur oxides (SO2 and SO3) and nitrogen oxides (NOx mainly, NO, and NO2) as well as particulates (mainly coal fly ash (CFA)) […]
ABSTRACT Electrostatic precipitators (ESPs) play a vital role in capturing fly ash from flue gases in thermal power plants. Traditional ESPs often encounter efficiency challenges due to fly ash accumulation on collection plates, necessitating frequent rapping systems to dislodge the ash. These rapping systems can be inefficient and lead to operational downtimes. The integration of […]
WHITE PAPER © 2025 Power Cycle Chemistry (PCC) Working Group of the International Association for the Properties of Water and Steam Publication in whole or in part is allowed in all countries provided that attribution is given to the International Association for the Properties of Water and Steam Power Cycle Chemistry Working Group Please cite […]
The German-Swiss Association for the Properties of Water and Steam (GSAPWS) e.V. held its annual general meeting and conference on March 6 and 7, 2025. This year, the events took place at Ruhr University Bochum.
ABSTRACT In a combined cycle power plant with a heat recovery steam generator, ammonia and hydrazine are injected into the boiler feedwater, while sodium phosphate is used in the drum boiler water. However, hydrazine is feared to cause health problems, and sodium phosphate may cause phosphoric acid corrosion. An alternative method has been applied in […]
ABSTRACT Film-forming amines (FFAs) are increasingly being used instead of conventional conditioning chemicals, as they offer advantages in corrosion protection, especially during operational shutdowns. This article offers an examination of the analytical methods used for quantifying FFAs, highlighting their theoretical basis, practical applications, and inherent challenges. It addresses sampling protocols and monitoring techniques to ensure […]
ABBREVIATIONS AEL Associated emission levels BAT Best available technology BF Bag filter BREF Best reference methods CIP Cleaning in place CTA Cellulose triacetate DFG Dry flue gas DNA Deoxyribonucleic acid DSI Duct sorbent injection EDI Electrodeionization ESP Electrostatic precipitator EU European Union FG Flue gas FGC Flue gas cleaning FGD Flue gas desulphurization FNU Formazine […]
ABSTRACT Accurate knowledge of the pH in boiler water is an important and central chemical parameter for the monitoring and control of the boiler chemical conditions and is critical to minimizing the corrosion processes. pH measurements, however, are not always easily or accurately measured, so alternative means of correctly estimating the boiler pH can be […]
Boulder, Colorado, USAJune 2024 Technical Guidance Document – 2024 Revision: Instrumentation for monitoring and control of cycle chemistry for the steam/water circuits of fossil-fired, combined cycle, and industrial power plants © 2024 International Association for the Properties of Water and Steam Publication in whole or in part is allowed in all countries provided that attribution […]
ABSTRACT Film-forming amine (FFA) applications are a recent strategy used by nuclear power plants for the corrosion protection of secondary-side components during outages and normal operation. Laboratory investigations of FFA applications are usually conducted in static autoclaves under conditions that are different from the field, where the conditions are dynamic with factors such as temperature […]
