Potential of 1-octanol and di-n-butyl ether (DNBE) to improve the performance and reduce the emissions of a direct injected compression ignition diesel engine

García, Antonio; Monsalve‐Serrano, Javier; Villalta, David; Zubel, Marius; Pischinger, Stefan

doi:10.1016/j.enconman.2018.10.009

Cited by 46 publications

(20 citation statements)

References 38 publications

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“…The development of future oxygenated lignocellulosic biofuels has put di-n-butyl ether (DBE) at the ranking of the most promising lignocellulosic biofuel and fuel additive [ 5 ]. Various experimental studies have highlighted the combustion characteristics of di-n-butyl ether and its effect on the performance of engines and injection systems [ 6 , 7 , 8 ], particle emissions [ 9 ], soot formation [ 10 , 11 ], and flame characteristics [ 12 ]. The combustion of di-n-butyl ether has been explored in different experimental systems and over various temperature and pressure ranges.…”

Section: Introductionmentioning

confidence: 99%

Towards a Comprehensive Characterization of the Low-Temperature Autoxidation of Di-n-Butyl Ether

et al. 2021

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In the present study, we investigated the oxidation of 2500 ppm of di-n-butyl ether under fuel-rich conditions (φ = 2) at low temperatures (460–780 K), a residence time of 1 s, and 10 atm. The experiments were carried out in a fused silica jet-stirred reactor. Oxidation products were identified and quantified in gas samples by gas chromatography and Fourier transform infrared spectrometry. Samples were also trapped through bubbling in cool acetonitrile for high-pressure liquid chromatography (HPLC) analyses. 2,4-dinitro-phenylhydrazine was used to derivatize carbonyl products and distinguish them from other isomers. HPLC coupled to high resolution mass spectrometry (Orbitrap Q-Exactive®) allowed for the detection of oxygenated species never observed before, i.e., low-temperature oxidation products (C8H12O4,6, C8H16O3,5,7, and C8H18O2,5) and species that are more specific products of atmospheric oxidation, i.e., C16H34O4, C11H24O3, C11H22O3, and C10H22O3. Flow injection analyses indicated the presence of high molecular weight oxygenated products (m/z > 550). These results highlight the strong similitude in terms of classes of oxidation products of combustion and atmospheric oxidation, and through autoxidation processes. A kinetic modeling of the present experiments indicated some discrepancies with the present data.

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Section: Introductionmentioning

confidence: 99%

Towards a Comprehensive Characterization of the Low-Temperature Autoxidation of Di-n-Butyl Ether

et al. 2021

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“…The use of DBE as a fuel additive has been shown to decrease soot emissions from diesel engines [2,3,5]. While DBE has been extensively examined under engine conditions [2][3][4][5]9,10], the fundamental oxidation chemistry of this fuel is not similarly well investigated. Recent studies address the high temperature (HT) oxidation of DBE, including the measurements of ignition delay times in a shock tube [11], premixed laminar flame speeds [12], and gaseous species [13] or soot particles [14] in flames.…”

Section: Introductionmentioning

confidence: 99%

Probing the low-temperature chemistry of di-n-butyl ether: Detection of previously unobserved intermediates

Tran

Wullenkord

et al. 2019

Combustion and Flame

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Din -butyl ether (DBE, C8H18O) has been proposed as a promising biofuel for diesel engines, but details of its low-temperature (LT) oxidation chemistry are not well understood. This paper reports new speciation data obtained in the temperature range of 400-1100 K at ϕ=1 and nearly-atmospheric pressure, using a plug flow reactor (PFR) combined with electron ionization (EI) molecular-beam mass spectrometry (MBMS) and two different jet-stirred reactors (JSRs) coupled with either online gas chromatography (GC) or tunable synchrotron vacuum ultraviolet (SVUV) photoionization (PI)-MBMS. The experimental results confirm that DBE is very reactive and exhibits two negativetemperature coefficient (NTC) zones around 500-550 K and 650-750 K. Speciation data with about 40 C0-C8 species are presented, including about 20 LT species not reported previously. Among those, fuel-specific C8H16O2 cyclic ethers were quantified. Also, butanoic acid, which is present in highest amounts among the detected LT intermediates, and C8H14O3 diones, were found to peak already near 500 K, suggesting their importance in the LT chemistry of DBE. Signals of several highly oxygenated peroxides (e.g., C8H14O5 and C8H16O6) were detected, indicating third O2 addition steps. Respective reaction pathways are suggested and discussed based on these experimental results. To better understand the LT chemistry of DBE, the present data were compared to two recent DBE models [L. Cai et al. Combust. Flame. 161 (2014) 798-809 and S. Thion et al. Combust. Flame 185 (2017) 4-15]. Significant discrepancies between the experimental data and both models were found for important LT intermediates, of which many were not included in the respective mechanisms. The results reported in the present study thus provide new opportunities for refining DBE kinetic models.

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“…In total up to 30 % of the final blend will consist of this bio-based synthetic alcohol mixture. These alcohols play a major role in the aim to reduce combustion emissions, since oxygenates lower soot emissions substantially [Janssen, A. J. et al 2011;García, A. et al 2018]. As alcohols are valuable chemical components with a variety of applications, there are several industrial paths for their production.…”

Section: Development and Scale-up Of Processes And Catalysts For Prodmentioning

confidence: 99%

REDIFUEL: Robust and efficient processes and technologies for drop-in renewable fuels for road transport

Heuser¹,

Vorholt²,

Prieto³

et al. 2020

Preprint

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This paper introduces the work of the joint project "Robust and Efficient processes and technologies for Drop-In renewable FUELs for road transport" (REDIFUEL). The overall aim is to enable the utilization of various biomass feedstocks for an ultimate renewable EN590 diesel biofuel in a sustainable manner. REDIFUEL's ambition is to develop new technologies, solutions and processes to reach high conversion efficiencies for renewable fuel production. The proposed drop-in biofuel contains high-cetane liquid (C11-C21) bio-hydrocarbons and C6-C11 bioalcohols showing exceptional combustion and pollutant mitigation performance. Environmental and social aspects are also considered by carrying out a comprehensive Biomass-to-Wheel performance analysis. First artificial fuel samples simulating the final product have been synthesized and analyzed with regard to fuel relevant properties, showing very promising results.

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Potential of 1-octanol and di-n-butyl ether (DNBE) to improve the performance and reduce the emissions of a direct injected compression ignition diesel engine

Cited by 46 publications

References 38 publications

Towards a Comprehensive Characterization of the Low-Temperature Autoxidation of Di-n-Butyl Ether

Towards a Comprehensive Characterization of the Low-Temperature Autoxidation of Di-n-Butyl Ether

Probing the low-temperature chemistry of di-n-butyl ether: Detection of previously unobserved intermediates

REDIFUEL: Robust and efficient processes and technologies for drop-in renewable fuels for road transport

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