Dual-fuel engines fueled with n-butanol/n-octanol and n-butanol/DNBE: A comparative study of combustion and emissions characteristics

Xiaorong Deng, Jing Li, Yifei Liang and Wenming Yang

Energy, 2023, vol. 263, issue PC

Abstract: The dual-fuel combustion mode has drawn much attention due to its high thermal efficiency and low emissions. In this study, to realize the dual-fuel combustion, n-butanol was selected as the port-injected fuel (PIF); whereas two C8-biofuels, i.e., n-octanol and di-n-butyl ether (DNBE), were used as the direct-injected fuels, respectively. A comparative study between n-butanol/n-octanol and n-butanol/DNBE fueled dual-fuel engines in terms of their combustion and emissions characteristics was numerically carried out with the KIVA4-CHEMKIN code. The energy fractions of PIF varied from 0 to 0.4 at 1500 rpm and 2280 rpm. The results show that with the PIF increasing, the peak pressure and CO emissions increase, while the combustion duration gets shorter. Though adding more n-butanol contributes to a lower global fuel reactivity, the ignition delay is still shortened. Compared with the n-butanol/n-octanol engine, the n-butanol/DNBE engine exhibits a shorter ignition delay due to the high reactivity of DNBE. Also, it has a lower maximum pressure rise rate and longer combustion duration for its diffusion combustion phase. Consequently, a higher indicated thermal efficiency and much lower CO emissions are observed in the n-butanol/DNBE dual-fuel engine, with the expense of a slight increase in NOx emissions.

Keywords: Dual-fuel engine; Combustion; Emissions; N-butanol; N-octanol; Di-n-butyl ether (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544222027906
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:263:y:2023:i:pc:s0360544222027906

DOI: 10.1016/j.energy.2022.125904

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().