Interest in oxy-fuel combustion as one of the leading carbon capture technologies has grown significantly in the past two decades. Experimental studies have shown higher CO concentration in oxy-fuel diffusion flames than in traditional air-fuel flames of both gaseous and solid fuels. The higher CO concentration changes the flame profiles, and it may have impacts on pollutants formation. This pa...

Oxy-fuel combustion is a key technology to realize CO2 capture and storage in coal-fired power boilers the future. In recent years, there have been extensive studies on it. This review summarizes some results of fundamental research oxy-coal combustion. By comparing with traditional boiler air station, typical characteristics are introduced from four aspects: combustion, heat transfer, pollutan...

Demonstration of oxy-coal combustion is being planned for the old Youngdong unit 1 boiler in South Korea. The boiler is to be retrofitted to an opposed-wall-firing type with 100 MWe capacity for demonstration of oxy-fuel combustion while maintaining the original furnace shape of downshot firing. It is to be operated under oxy-coal combustion mode during demonstration periods while continuing co...

The superalloys are generally used for high-temperature applications, and since they operate in an aggressive environment, it is required to protect them with appropriate coating enhance the life of superalloy material. In present study, Ti-31 coated cermets Al2O3+NiCrBSi by high-velocity oxy fuel (HVOF) spray technique, hot corrosion tests were performed on both uncoated samples, presence Na2S...

Inconel and micro nano WC-12Co powders were deposited on AISI 4140 carbon steel by high-velocity oxy fuel (HVOF) coating followed laser surface modification. Laser power scan speed varied at different levels. Microstructure microhardness investigated. Nanocoatings performed better than microcoatings. Nanostructured WC powder coatings exhibited greater hardness compared to microstructured coatin...

Material deterioration due to erosion and oxidation in high-temperature environments is a major cause of wear power plants, aircraft engines petrochemical industries. NiCrSiB based surface coatings using thermal spray techniques such as High-Velocity Oxy-Fuel (HVOF) offer cost-effective route improve the tribological properties for range substrate materials. The study investigates resistance HV...

Abstract The addition of refractory metals represents a promising approach for development future high-entropy alloys (HEAs). Niobium and molybdenum are particularly suitable additives increasing hardness as well wear corrosion resistance. In the context surface protection applications, eutectic (EHEAs) with their homogeneous property profile specific interest. present work, two EHEAs were deve...

Burning fuels in an O2/H2O atmosphere is regarded as the next generation of oxy-fuel combustion for CO2 capture and storage (CCS). By combining oxy-fuel combustion and biomass utilization technology, CO2 emissions could be further reduced. Therefore, this work focuses on investigating the combustion characteristics of single particles from bituminous coal (BC) and pine sawdust (PS) in O2/N2, O2...

In the present work, 5 wt.% and 10 yttria-stabilized zirconia (YSZ) nanoparticles were reinforced in Ni-20Cr powder deposited on boiler tube steel using a high-velocity oxy-fuel spraying process. The effect of YSZ reinforcement microhardness, surface roughness porosity was investigated. hardness highest for nanocomposite coating with found to increase decrease porosity. microstructure elements ...