Results 21 to 30 of about 578 (164)

Study of Hedge Ignition and Flame Propagation Characteristics of Unsymmetrical Dimethylhydrazine and Its Metamorphosed Mixtures in a Nitrogen Tetroxide Atmosphere

open access: yesEnergies, 2023
Unsymmetrical dimethylhydrazine (UDMH) is a common liquid propellant widely used in rocket engines and other applications. The safety of UDMH in service is affected by its slow oxidation during long-term storage to form impurities such as dimethylamine ...
Xinhui Wang   +7 more
doaj   +1 more source

Numerical simulation study on suppression effect of water mist on PMMA combustion under external radiant heat flux

open access: yesFrontiers in Materials, 2023
Numerical model was built with fire dynamic simulator and theocratical simulation was carried out to investigate the suppression effect of water mist on ignition and combustion process of typical solid material polymethyl methacrylate under external ...
Lanming Zhao   +7 more
doaj   +1 more source

Ignition characteristics of nitromethane-doped ethanol in a heated shock tube

open access: yesEnergetic Materials Frontiers, 2021
Ignition delay times of nitromethane-doped ethanol dual fuels are measured under the micro-combustion engine conditions (8 ​× ​105 ​Pa and 904–1477 ​K). The promotion effect of nitromethane on ethanol ignition is more pronounced at a fuel-lean condition;
Yan-lei Shang   +7 more
doaj   +1 more source

Experimental and Numerical Studies of Ignition Delay Time and Laminar Flame Speed of JP-10 at Elevated Temperature Conditions

open access: yesFrontiers in Energy Research, 2022
In this work, the laminar flame speeds of JP-10/air mixtures and ignition delay time of JP-10/O2/Ar mixtures have been studied over a wide range of experimental conditions using a premixed Bunsen flame and a shock tube.
Junsen Yang   +6 more
doaj   +1 more source

Toward a Unified Mechanistic Understanding of Polymer Electrolytes for Advanced Solid‐State Batteries

open access: yesAdvanced Materials, EarlyView.
Polymer electrolytes (PEs) are often indiscriminately grouped as “solid polymer electrolytes (SPEs)”, despite fundamental differences in their ion‐transport mechanisms. This Perspective establishes a mechanism‐based framework that distinguishes gel, quasi‐solid, and all‐solid polymer electrolytes based on their dominant ion‐transport pathways.
Jing Chen   +15 more
wiley   +1 more source

Flame‐Retardant Quasi‐Solid‐State Electrolytes From Self‐Assembled Azolate Hybrid Frameworks for Highly Safe Lithium Batteries

open access: yesAngewandte Chemie, EarlyView.
This work develops a spray‐assisted in situ assembly technique to construct AHF materials with nitrogen/oxygen‐regulated one‐dimensional channels on glass fiber, providing abundant active sites and enabling rapid transport for lithium ions. Subsequently, phosphate flame retardants are encapsulated via in situ polymerization, resulting in a thermally ...
Shun Wang   +9 more
wiley   +2 more sources

An Experimental and Detailed Kinetics Modeling Study of Norbornadiene in Hydrogen and Methane Mixtures: Ignition Delay Time and Spectroscopic CO Measurements

open access: yesEnergies, 2023
High-energy-density compounds such as norbornadiene (NBD) are being considered as potential cost-effective fuel additives, or partial replacements, for high-speed propulsion applications.
Matthew G. Sandberg   +4 more
doaj   +1 more source

Stabilizing Electrochemical Interfaces With Multifunctional Cobalt Nitride Layers

open access: yesAdvanced Materials Interfaces, EarlyView.
Cobalt nitrides emerged recently as an interesting class of earth‐abundant oxygen evolution catalysts. Herein, plasma‐enhanced atomic layer deposition is used to synthesize multifunctional cobalt nitride layers that simultaneously protect and catalytically activate photoelectrode surfaces.
Matthias Kuhl   +7 more
wiley   +1 more source

CO2‐Induced Reverse Lattice Oxygen Spillover on Pt/CeO2 Enables Sulfur‐Resistant Dry Reforming of Methane

open access: yesAngewandte Chemie, EarlyView.
A critical step, dry reforming of methane (DRM) converts biogas into useful syngas. Yet trace H2S in biogas rapidly poisons DRM catalysts, limiting practical use. We developed a robust Pt/CeO2 catalyst sustaining DRM activity via CO2‐induced reverse lattice oxygen spillover in H2S‐rich environments.
Jun Liu   +11 more
wiley   +2 more sources

An Empirical Correlation to Predict the Ignition Delay Time for Some Hydrocarbon Fuels [PDF]

open access: yesIranian Journal of Chemical Engineering, 2016
Examination of the available ignition delay time data and correlations in the case of methane, butane, heptane, decane, kerosene, Jet-A and ethylene fuels, allowed the derivation and recommendation of standard equations for this property.
F. S. Shariatmadar   +2 more
doaj  

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