A5044966805- High-Temperature Coating Behaviors
- Advancements in Solid Oxide Fuel Cells
- Arsenic contamination and mitigation
- Nuclear Materials and Properties
- Semiconductor materials and devices
- Electronic and Structural Properties of Oxides
- Catalytic Processes in Materials Science
- Corrosion Behavior and Inhibition
- Biodiesel Production and Applications
- Fluoride Effects and Removal
- Carbon Dioxide Capture Technologies
- Global Energy and Sustainability Research
- Hydrogen embrittlement and corrosion behaviors in metals
- Adsorption and biosorption for pollutant removal
- Fuel Cells and Related Materials
- Metallurgical Processes and Thermodynamics
- Thermal and Kinetic Analysis
- Solar Thermal and Photovoltaic Systems
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Coal and Its By-products
- Iron and Steelmaking Processes
- Heat Transfer and Optimization
- Intermetallics and Advanced Alloy Properties
- Advanced materials and composites
- Concrete Corrosion and Durability
King Mongkut's Institute of Technology Ladkrabang
2016-2025
Abstract Chromium volatilization from the surface of Cr 2 O 3 pellets was investigated in atmospheres containing Ar–20%CO and –40%H at 600 – 800 °C. The measured fluxes Cr-loss were 6 orders magnitude higher than calculated based on conventional reaction: 1/2Cr 3(s) + 3/4O 2(g) H (g) = CrO (OH) considering both case that impurities thermal decomposition CO equilibrium. As detected after exposure to -containing environments, possible mechanism explain chromium phenomena is proposed as...
Based on the transport theory of multicomponent gas mixtures, we proposed an expression for determining standard volatilisation enthalpy and entropy chromia exposed to humidified oxygen at 298 K. The use this could lead quantification those thermodynamic quantities when mass flux Cr loss due is determined. We thus experimentally measured fluxes in atmospheres 873–1073 As a result, subjected K were quantified, giving values 61.1 ± 1.0 kJ mol−1 −43.0 1.9 J K−1 mol−1, respectively. calculated...
The chapter introduces components and working principle of solid oxide fuel cells (SOFCs). It is followed by the explanation on choices materials focussing ferritic stainless steels. review further made required properties these steels, i.e. low oxidation rate, chromium species volatilisation high electrical conductivity good scale adhesion. For aspect, behaviour steel interconnect in cathode, anode (hydrogen biogas), dual atmospheres are described. Surface modification pre-oxidation...
Evacuated-tube solar collector (ETSC) is developed to achieve high heating medium temperature. Heat transfer fluid contained inside a copper heat pipe directly affects the A 10 mol% of ethylene-glycol in water this system. The purpose study modify inner structure evacuated tube for promoting through aluminum fin by inserting stainless-steel scrubbers increase conduction surface area. experiment set up measure temperature at tip which exchange area between and medium. vapor/ liquid...
AISI 441 ferritic stainless steel is a good candidate for metallic interconnects of solid oxide fuel cells (SOFCs). In this alloy, the minor elements Ti and Nb are used to stabilise structure but their influence on durability not well understood. This study focuses early stages oxidation (24 h) at 800°C under 5%H2O in O2 following cathodic SOFCs conditions. The typical duplex scale, composed (Mn,Cr)3O4 spinel top layer Cr2O3 rich sublayer observed, with nodules growing places. These objects,...
For economical and environmental reasons, hydrogen is considered as a major energetic vector for the future. Hydrogen production via high temperature water vapour electrolysis (HTE) promising technology. A technical difficulty related to development of interconnects working efficiently long period. Working 800°C enables use metallic materials interconnects. Chromia forming alloys are among best candidates. The interconnect material chosen in present study ferritic stainless steel with 18%...
This chapter primarily reviews the nature of water vapour when it presents in bulk gas. The change a ratio between and corresponding dissociated hydrogen, which determine thermodynamic stability oxide formation, is analysed oxidation kinetics are linear parabolic. When reaches solid/gas interface, chromium species volatilisation controlled by surface reaction can occur. adsorbed be further incorporated into possibly form hydrogen defects. role these defects on altering defect structure...
Thin slab interested in this work was the one with thickness of ca. 50 mm and mainly made from recycled steel. Chemical composition studied steel strip produced such Fe 0.077 wt% C, 0.233 Mn, 0.191 Si, 0.159 Cu 0.052 Ni. Scale retained on that after hot rolling studied. The hot-rolled sample pickled 10%v/v HCl aqueous solution at 80 °C. Weight loss relative XRD peaks hematite-per-iron magnetite-per-iron were measured different pickling periods time. It observed as-received scale crack-free....
AISI 441 ferritic stainless steel is a good candidate for metallic interconnects in solid oxide fuel cells (SOFCs). The minor elements Ti and Nb are used to stabilize the matrix also reduce creep by combination of solution strengthening precipitation intermetallic Laves phase particles along grain boundaries. However their influence on oxidation behavior not well understood. This study focuses early stages (from 4 24 h) at 800 °C under 5% H 2 O . A relatively smooth micro-crystallized scale...
Ground oyster shells were calcined and used as an adsorbent to remove As (III) from contaminated water. Adsorption experiment was performed by batch tests. The effect of pH on the adsorption performance investigated. result showed that at initial concentration 100 mg/L, over range 5-11, highest efficiency obtained 11. experimental data better correlated with pseudo-second order model. maximum capacity (q m ) approximately 195.5 mg/g
The calcined ground oyster shell was used as the adsorbent to remove As(III) from contaminated water under presence of anions. solubility and precipitation tests indicated that As(III), NO3−, SO42- were removed by adsorption process whereas HPO42- processes. results showed that, in bi-solutes, strongly interfered with removal. In case tri- tetra-solutes, performances anions depended on (1) binding affinity between sorption sites adsorbates, (2) observed rate constant (3) electrostatic...
Biogas is an alternative source of fuel potentially used to run solid oxide cells (SOFCs). It mainly consists CH4 and CO2 which can degrade the SOFC interconnect, typically made stainless steel. To investigate effect each gas constituent, we focussed here on high-temperature oxidation behavior scale adhesion steel Type 430 The samples studied were oxidised in at contents 5–100% 800 °C. kinetics found be parabolic with rate constant increasing when content increased. was assessed using a...
OS-TRHA pellets prepared from oyster shell (OS) powder and treated rice husk ash (TRHA) were used as the adsorbent for arsenite (As(III)) removal contaminated water. The effect of OS:TRHA ratio on As(III) performance was investigated via batch tests. most appropriate OS TRHA pellet preparation 0.7:0.3 since it provided acceptable adsorption capacity about 26.2 mg g−1 without cracking. before after tests characterized by X-ray diffraction (XRD) scanning electron microscope (SEM). mechanism...
To reduce the pollution emission from vehicles, an improvement on combustion process is expected, leading to increased exhaust gas temperature. As a result, development of new materials for manifold used at higher temperatures required. A cost-effective cast iron treated by aluminising pack cementation was developed in present work combat high temperature corrosion. Its kinetics under cyclic oxidation N2–12%O2–10%H2O 850 °C parabolic with rate constant (kp) 5.66 × 10−12 g2 cm–4 s–1, about...