Synergistic effects of CO2 dilution and H2 addition on the laminar combustion characteristics of NH3/CH4 blends at high temperature and pressure

Energy, Год журнала: 2025, Номер 320, С. 135267 - 135267

Опубликована: Март 3, 2025

Язык: Английский

---

Comparative effects of H2 and NH3 on hydrocarbon fuels laminar combustion characteristics and pollutant emissions: Status and challenges

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 109, С. 129 - 149

Опубликована: Фев. 11, 2025

Язык: Английский

---

Experimental and Numerical Study on the Effects of N₂ and NH₃ in NH₃/Syngas/Air Laminar Premixed Flame

Energy & Fuels, Год журнала: 2024, Номер 38(11), С. 10144 - 10155

Опубликована: Май 9, 2024

Blending syngas with ammonia (NH3) effectively overcomes the high minimum ignition energy and low laminar burning velocity (SL) of NH3, facilitating realistic application NH3 as a fuel for gas turbines. Thus, present study combines experiments numerical simulations to investigate impacts diluent N2 (0–60%) (25–50%) on NH3/syngas/air flames. The analysis suggests that increasing content, respectively, results in decrease SL mixture. At Φ = 1.0, content increases from 0 60%, mixture decreases 80.1 28.3 cm/s. 36.4 cm/s 25 50%. increase maximum mole fractions H, OH, O radicals, net reaction rates chain reactions also decrease. rate H + O2 OH at ZN2 60% by 85.8% compared 0.018 (mol/cm3 s) 0% 1.0. As increases, impact associated mechanism combustion process becomes more pronounced. With ratio chemical effect physical initially then decreases, reaching value 25.4% around ZNH3 30%. This is much less than 1, indicating an overall inhibitory effect. pathways NO emissions presence reduces consumption, which turn generation. promotes conversion N2O N2, simultaneously reducing emissions.

Язык: Английский

---

Thermodynamic and emission analysis of CH4/H2/NH3 ternary fuel applied in gas turbine system under oxygen-rich atmosphere

Thermal Science and Engineering Progress, Год журнала: 2025, Номер unknown, С. 103649 - 103649

Опубликована: Май 1, 2025

Язык: Английский

---

A skeletal mechanism for n-dodecane/ammonia combustion and an open-source reaction scheme optimization tool

Fuel, Год журнала: 2024, Номер 373, С. 132168 - 132168

Опубликована: Июль 1, 2024

The significance of ammonia (NH3) as an alternative fuel is increasing due to its potential a carbon-free energy carrier. However, known for difficult combustion characteristics. One possible solution blend it with high reactivity diesel fuel. In this work, n-dodecane has been chosen the surrogate. order investigate blends n-dodecane, new skeletal chemical kinetic mechanism developed. proposed model consists 75 species and 451 reactions, making most concise state-of-the-art mechanism. For development, (a) experimental data from literature gathered, (b) 8 objectives have defined 17 sets, (c) sensitive reactions identified open-source Cantera software, (d) pre-exponential factors pertaining 86 optimized within relevant uncertainty ranges, (e) JAYA algorithm utilized optimization. shows roughly 70% improvement specified objectives, such ignition delay times, laminar burning velocities, profiles, compared unoptimized starting Additionally, very good agreement observed wide range operating conditions during validation. accompanied by open source graphical user interface efficient

Язык: Английский

---

Experimental and kinetic study of laminar combustion characteristics of ammonia/air mixtures under oxygen enrichment at high temperature and pressure

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160528 - 160528

Опубликована: Фев. 1, 2025

Язык: Английский

---

Effect of equivalence ratio on intrinsic instability and self-acceleration of oxygen-enriched hydrogen-doped methane flames

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 112, С. 378 - 390

Опубликована: Март 1, 2025

Язык: Английский

---

Numerical investigation on the performance of a W-type radiant tube using ammonia/hydrogen/methane blends

Applied Thermal Engineering, Год журнала: 2025, Номер unknown, С. 126498 - 126498

Опубликована: Апрель 1, 2025

Язык: Английский

---

Study on the instability and NO emission of NH3/O2/N2 laminar flame under O2-enriched conditions

International Journal of Hydrogen Energy, Год журнала: 2025, Номер 130, С. 156 - 167

Опубликована: Апрель 25, 2025

Язык: Английский

---

Chemical kinetic analysis of H₂–NH₃ addition on premixed natural gas flame at elevated pressures

International Journal of Chemical Reactor Engineering, Год журнала: 2025, Номер unknown

Опубликована: Май 22, 2025

Abstract The combustion of hydrocarbon fuels is a complex chemical reaction process. In this study, the effects various H 2 –NH 3 blending ratio ( α ) in CH 4 /H /NH ternary fuel on laminar burning velocity (LBV), CO , NOx, adiabatic flame temperature, and temperature sensitivity were investigated using Chemkin/Premix code. results showed that exerted more pronounced LBVs compared to hydrogen volume fraction mixture β ). Fuel-rich effectively reduced NOx emissions, experiments pure NH blending, significantly emissions premixed flames when equivalence ratios Φ exceeded 1.0. Temperature analysis revealed R318 (NH + O <=> HNO H) exhibited inhibition. This observation elucidated initiation → NO N pathway demonstrated C–N reactions negligible predicting characteristics fuel.

Язык: Английский

---