Effect of long chain oxygenated fuels for soot formation on n-heptane flames: An experimental study

Journal of the Energy Institute, Journal Year: 2025, Volume and Issue: unknown, P. 101984 - 101984

Published: Jan. 1, 2025

Language: Английский

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Performance and combustion characteristics of Heavy-Fuel aircraft piston engines at high altitudes: Comparison between conventional fuels and HEFA sustainable aviation fuel

Sustainable Energy Technologies and Assessments, Journal Year: 2025, Volume and Issue: 75, P. 104210 - 104210

Published: Jan. 31, 2025

Language: Английский

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Numerical investigation of soot formation in methane/n-heptane laminar diffusion flame doped with hydrogen at elevated pressure

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 79, P. 1237 - 1249

Published: July 14, 2024

Language: Английский

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Synergistic effects of ether oxygen bond/benzene ring and hydrocarbon chain structure on soot morphology and nanostructure

Fuel, Journal Year: 2024, Volume and Issue: 381, P. 133362 - 133362

Published: Oct. 9, 2024

Language: Английский

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Formation of Polycyclic Aromatic Hydrocarbons (PAHs) in Thermal Systems: A Comprehensive Mechanistic Review

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(22), P. 21735 - 21792

Published: Nov. 1, 2024

Polycyclic aromatic hydrocarbons (PAHs) are formed invariably through oxidative and pyrolytic degradation of organic materials fuels. Understanding the highly complex reaction mechanisms that dictate their synthesis in thermal systems has been given a great deal focus. Such interest stems from two broad perspectives, namely, enhancing efficiency combustion system, energy recovery fuels protecting environment. Health environmental effects widely vary among PAHs where certain compounds exhibit carcinogenic tendencies. This critical review mainly aims to provide general mechanistic view commonly discussed formation pathways PAHs. The attained knowledge often incorporates experimental measurements kinetic modelings, as well mapped out by quantum chemical calculations. A sampling species is typically conducted via molecular beam (MB)–mass spectroscopy (MS) technique connected reactor (flow reactor, jet-stirred or shock tube). Generally, PAH precursors encompass four categories (radicals molecules): acetylenic compounds, alkyl radicals, phenyl resonance-stabilized cyclic radicals. Overall, relevance mechanism depends on consistency between proposed model pathways, profiles products at investigated conditions (i.e., temperatures, pressures, distance burners). effect seeding common precursors, with other explored surveying pertinent studies. Growth higher PAHs, including toxic pyrene, most likely involves hydrogen abstraction acetylene addition (HACA)-like starting anthracene bimolecular reactions involve benzyl radicals indene molecules. synergistic collaboration different suggested account for observed fast growth rate As experimentally shown, sequential mass 15 u, 24 26 74 indicate routes MAC, HACA, HAVA*, PAC routes, respectively. Whether physical process initial step conversion into soot (the inception step) still debated literature. Recent evidence underscores commence creating dimers clustering under real flame 400–1200 K). Formation synthetic natural polymers ensues condensation fragments structural arrangements polymeric entities, prior fragmentation. surveyed presented this will be useful readers who aim comprehend chemistry underlying systems.

Language: Английский

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Insights into the Role of Fuel Structure and Blending in Soot Formation for C1–C4 Hydrocarbon Flames

Journal of the Energy Institute, Journal Year: 2025, Volume and Issue: unknown, P. 102011 - 102011

Published: Jan. 1, 2025

Language: Английский

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Numerical simulation of the effects of NH₃ and H₂ on the combustion characteristics of laminar premixed ethylene/air flames

International Journal of Chemical Reactor Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 10, 2025

Abstract Hydrogen (H 2 ) and ammonia (NH 3 are highly promising carbon-free fuels can mitigate the greenhouse effect threat. The laminar combustion characteristics of ethylene (C H 4 doped with NH were numerically calculated at large doping proportion (0–50 %), initial temperatures (T u = 300–400 K), pressures (P 0.1–1.0 MPa) by using Chemkin/Premix Code. equivalence ratio ( Φ ranged from 0.75 to 1.5. Laminar burning velocities (LBVs), adiabatic flame (AFTs), net heat release rates (NHRRs), temperature sensitivity analysis (TSA), mole fractions radicals H, O, OH intermediates C , NO, NO rate production (ROP) reaction pathways studied in this research. results showed that promoted increase /air LBVs, AFTs NHRRs, while had contrary effects. R1 + O <=> OH) largest positive coefficient more than 0.3. Through TSA ROP, R146 was main product could be effectively inhibited after . Additionally, fraction decreased as increased but peak located much closer nozzle inlet R392 (NO HO linked pathway on reducing CO stronger

Language: Английский

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Effect of different components in cement raw meal on carbothermal reduction of NO in flue gas: An experimental study

Particuology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 1, 2025

Language: Английский

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Multi-scale exploration of the effects of fuel structure and hydrogen-doped on soot formation

Journal of the Energy Institute, Journal Year: 2025, Volume and Issue: unknown, P. 102056 - 102056

Published: Feb. 1, 2025

Language: Английский

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Improving pollutant emission performances of natural gas combustion in a metal fiber surface burner using Y2O3-BaO-ZrO2 catalytic coatings

Energy, Journal Year: 2025, Volume and Issue: unknown, P. 135457 - 135457

Published: March 1, 2025

Language: Английский

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