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Fuels & combustion

TL;DR

This theme hub summarizes how the current corpus treats fuel combustion and flame-relevant chemistry, with emphasis on reactive MD studies of high-temperature oxidation, deflagration-related behavior, and coke- or soot-adjacent reaction networks. It is intentionally paired with theme-pyrolysis-combustion-organics, because several papers can be read through either a combustion-first or pyrolysis-first lens depending on the question.

Scope (in / out)

In scope are corpus pages where combustion is the stated framing: flame chemistry, deflagration, oxidizer-rich high-temperature fuel networks, and petroleum-coke oxidation discussed as combustion behavior. Out of scope are catalyst-focused heterogeneous reaction studies that are better centered in theme-catalysis-surfaces, and slow thermal decomposition studies that are primarily pyrolysis narratives in theme-pyrolysis-combustion-organics.

How this theme is organized in the corpus

The corpus uses both domain:fuel-combustion and domain:organics-polymers-pyrolysis for some overlapping studies. Because domain index views can privilege one primary domain tag, this hub acts as a retrieval bridge so combustion-relevant papers remain discoverable even when they are filed under adjacent organic or pyrolysis categories elsewhere.

Literature review (this knowledge base)

Coke, sulfur, and high-T oxidation

2018qifan-combustion-a-reaxff-simulations is the core petroleum-coke anchor in this theme. In the corpus framing, it connects sulfur-containing C/H/O/S chemistry to combustion-relevant high-temperature oxidation pathways. The same underlying chemistry can also appear in pyrolysis discussions, so cross-reading with theme-pyrolysis-combustion-organics is often necessary for interpretation.

Combustion phenomenology and reactive pathways

2018jain-j-phys-chem-understanding-combustion and 2017joshi-combustion-a-observation-deflagration provide the main combustion and deflagration-oriented thread in this corpus slice. They are useful as conceptual entry points for reaction-network reasoning and qualitative combustion behavior in reactive simulations. 2025li-fuel-404-202-critical-nanoparticle is included as a fuel-adjacent combustion context, but users should rely on the associated paper page for exact system boundaries and claim strength.

Aviation and fuel molecules

2021lele-fuel-297-202-reaxff-molecular contributes a molecular-level aviation-fuel decomposition example with high-temperature kinetics framing. Within this theme, it functions as a bridge between combustion chemistry questions and fuel-specific mechanism exploration. For questions centered on slow thermal conversion of larger carbonaceous feedstocks, the pyrolysis hub remains the better first stop.

Analysis and cross-cutting patterns

Across the current corpus, combustion-oriented ReaxFF studies are stronger at exploring possible reaction pathways than at reproducing full experimental flame diagnostics. Reported barriers, temperature windows, and kinetic trends should therefore be interpreted as study-local unless the originating paper explicitly performs cross-model or experiment-facing benchmarking. A recurring pattern is methodological value for hypothesis generation, paired with explicit transferability limits for quantitative prediction outside the trained or validated regime.

Debates, tensions, and limitations

The boundary between pyrolysis and combustion is not always clean in tagging or narrative emphasis, so retrieval frequently requires checking both this hub and theme-pyrolysis-combustion-organics. Parameter transferability remains a standing tension for reactive force fields, especially when moving across fuel classes, oxidizer conditions, or thermodynamic regimes; see transferability-reactive-ff and reaxff-family. A second active tension is how ReaxFF compares with MLIP-style alternatives for organic combustion chemistry, discussed in reaxff-vs-mlip-accuracy and theme-ml-atomistic-potentials.

Gaps and open directions (corpus view)

The combustion slice is still incomplete relative to the full corpus, and this hub should expand as additional domain:fuel-combustion paper pages are curated to blueprint depth. The corpus also remains thinner on direct links between atomistic outputs and experimental flame observables, which limits confident cross-paper synthesis on quantitative combustion performance. In practical terms, this page should continue to emphasize what is present in curated notes and avoid extrapolating beyond paper-level evidence.

Methods and limitations

Most evidence in this hub is derived from reactive atomistic simulations and review-style synthesis rather than one-to-one laboratory flame replication. As a result, combustion interpretations should be read with attention to simulation timescale limits, sampling constraints, and force-field transferability assumptions stated on each paper page. Where a linked page is metadata-thin or fuel-adjacent rather than flame-centered, this hub treats it as contextual support rather than definitive combustion evidence.

Representative entry points

MAS / retrieval

id: concept:theme-combustion-flames-fuels. Prefer domain:fuel-combustion for combustion-first pages and add cross-links to theme-pyrolysis-combustion-organics when both framings are valid. Refresh source_refs and supported_by whenever new combustion-focused paper pages are promoted from stubs to evidence-bearing summaries.