Furan and its derivatives have been receiving attention as next generation alternative fuels, related to advanced bio-oil production. However, the ignition quality of furans allows their use only as an additive to diesel fuel in CI engines, which potentially requires the continued use of a fossil-derived base fuel. This study first adopts tri-propylene glycol mono-methyl ether (TPGME) as a substitute for diesel fuel with addition of furan and furan derivatives, including 2-methylfuran, 2,5-dimethylfuran, and furfural, thereby removing fossil-derived fuels from the mixture. With this motivation, gas-phase ignition characteristics of furans were investigated in a modified CFR motored engine, displaying an absence of low temperature heat release (LTHR), while n-heptane as a reference fuel shows a strong two-stage ignition characteristic under the same condition. The structural impact of furans is represented as global oxidation reactivities that are as follows: furan < 2-methylfuran < 2,5-dimethylfuran < furfural < n-heptane. The ranking of individual furans is supported by bond dissociation energies of each fuel's functional group substituent on the furan-ring. Ignition characteristics of TPGME display a strong low-temperature oxidation reactivity; however, its reactivity rapidly diminishes with increasing amounts of furan, shutting down low-temperature oxidation paths. The structural impact of furan and methyl-substituted furans on reactivity is significantly muted when blended with TPGME, as observed in a motored CFR engine and a constant volume spray combustion chamber.

呋喃及其衍生物作为与先进生物油生产有关的下一代代用燃料已受到关注。但是，呋喃的点火质量仅允许它们用作CI发动机中柴油的添加剂，这可能需要继续使用化石衍生的基础燃料。这项研究首先采用三丙二醇单甲醚（TPGME）替代柴油，并加入了呋喃和呋喃衍生物，包括2-甲基呋喃，2,5-二甲基呋喃和糠醛，从而从化石燃料中去除混合物。以此动机为基础，在改进的CFR机动发动机中研究了呋喃的气相点火特性，显示不存在低温放热（LTHR），而正庚烷作为参考燃料在相同条件下显示出很强的两级点火特性。呋喃的结构影响表示为如下的整体氧化反应性：呋喃<2-甲基呋喃<2,5-二甲基呋喃<糠醛<正庚烷。呋喃环上每种燃料的官能团取代基的键解离能支持各个呋喃的排名。TPGME的点火特性表现出很强的低温氧化反应性；但是，它的反应性随着呋喃的增加而迅速降低，从而切断了低温氧化途径。当与TPGME混合时，呋喃和甲基取代的呋喃对反应性的结构影响被显着减弱，如在电动CFR发动机和恒定体积的喷雾燃烧室中观察到的。