Experimental and modeling study of the autoignition for diesel and n-alcohol blends from ethanol to n-pentanol in shock tube and rapid compression machine

Autoignition of Ethanol-Diesel Blends: Is it Worth Dehydrating Ethanol?

“…Such increase is estimated as 1 %, 9.5 %, 16.5 % and 28.5 %, for 2.5, 5, 7.5 and 10 % of hydrated ethanol in diesel (v/v), with respect to the autoignition delay time of neat diesel, respectively. This trend coincides with that demonstrated experimentally [7,9,10] and theoretically [36]. Zhu et al [37] explains that this is the result of a competition between diesel (mainly by its paraffinic part) and alcohol for •OH radicals.…”

The spray ignition characteristics of ethanol blended with hydro-processed renewable diesel in a constant volume combustion chamber

“…16. Besides, this is in line with the findings in the literature, where the predictions using the kinetic models for different diesel/gasoline-alcohol blends [18,49,50] were also reportedly deviated from the experimental measurements at selected conditions. On the other hand, it was noticeable that the ID periods for the HRD-ethanol blends were extended in accordance with the increase in ethanol level of the HRD-ethanol blends.…”

“…Meanwhile, the blending percentage of ethanol was found pertinent to the ID periods for the n-heptane/ethanol blend at pressures from 0.772-3.861 MPa and 𝜑 from 0.2-2.0, due to the NTC inhibition behavior in ethanol [19]. Nevertheless, the aforementioned works [14][15][16][17][18][19][20] have been concentrated on the individual surrogates for diesel and alcohol, for which limited prior effort on the kinetic modeling specifically for HRD and its blend with ethanol has been reported in the literature. understanding of the ignition events for fuel combustion using HRD fuel blended with ethanol can be attained.…”

“…Cheng et al [17] simulated the autoignition characteristics for alcohol ranging from ethanol to butanol at pressures of 20 and 40 bar and temperatures from 750-980 K but the disagreement was obtained when the predicted ID periods were validated. Meanwhile, a stoichiometric mixture of 80% diesel and 20% ethanol blend displayed the highest reactivity at 10 bar pressure than n-propanol (nC3H7OH)/diesel, n-butanol/diesel, and n-pentanol (nC5H11OH) did [18]. Meanwhile, the blending percentage of ethanol was found pertinent to the ID periods for the n-heptane/ethanol blend at pressures from 0.772-3.861 MPa and 𝜑 from 0.2-2.0, due to the NTC inhibition behavior in ethanol [19].…”

Theoretical investigation on isomerization and decomposition reactions of pentanol radicals-part I: branched pentanol isomers

“…3 The combustion characteristics of long-chain alcohols mixed with diesel were studied using some equipment such as a rapid compression machine and a shock tube. [4][5][6] In addition, pentanol can also be produced through biological routes, [7][8][9] such as glucose biosynthesis by Escherichia coli and natural microbial fermentation; these advances in microbial metabolic engineering also offer promising prospects for the large-scale production of pentanol.…”