Methanol-HVO blends for efficient low-temperature combustion: analytical research on fuel properties
Laen...
Kuupäev
2023
Kättesaadav alates
Autorid
Wang-Alho, H.
Sirviö, K.
Hissa, M.
Mikulski, M.
Niemi, S.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Estonian University of Life Sciences
Abstrakt
Next-generation low-temperature combustion (LTC) engines can accommodate
ultra-high efficiency with near-zero NOx and PM emissions. Reaction kinetics is the governing
mechanism in LTC. Onboard fuel reactivity control is, thus, becoming an interesting concept that
ultimately provides pathways toward a fully fuel-flexible engine. No matter the technical
realisation - in-cylinder blending or pre-blending/emulsification - the reactivity control requires
fuels with complementary properties. Methanol and hydrotreated vegetable oil (HVO) seem to
be one of the most promising, yet under-studied combination for LTC engines. They are both
renewable and can be mixed together. Methanol’s high knock resistance and large latent heat of
evaporation enable a wide engine load range, with a propensity to reduce NOx emissions and
mitigate thermal or mechanical stress. The same properties on the other hand require highly
reactive fuel to enable the mixture to self-ignite controllably in LTC conditions. HVO is amongst
the most reactive renewable alternatives and its clean paraffinic structure further mitigates
particle matter formation. - Importantly, in pre-blending HVO emulsification can resolve the
lubricity issues of methanol. In this paper, the aim was to study the engine-relevant properties of
HVO-methanol fuel blends. The analysed properties were the distillation properties, density,
kinematic viscosity, cetane index, and flash point. Based on the results, the suitability of the
chosen blend shares for LTC concepts was evaluated.
Kirjeldus
Received: January 31st, 2023 ; Accepted: April 15th, 2023 ; Published: August 14th, 2023 ; Correspondence: katriina.sirvio@uwasa.fi
Märksõnad
CI engines, fuel blending, HVO, LTC, methanol, articles