Experimental Investigation on the Combustion and Emissions Characteristics of n-Butanol / GTL and n-Butanol/Diesel Blends in a Single-Cylinder MD-CI Engine

Muiños, Martin; Soloiu, Valentin; Moncada, Jose; Gaubert, Remi; Williams, Johnnie

doi:10.4271/2017-01-0719

Cited by 2 publications

(1 citation statement)

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“…Alcohols could be present as products of biodiesel oxidation. Higher molecular weight alcohols have also been studied as oxygenated diesel‐range fuel components (Muinos et al, ). The addition of acid (e.g.…”

Section: Resultsmentioning

confidence: 99%

Model Reactions Involving Ester Functional Groups during Thermo‐Oxidative Degradation of Biodiesel

Ball

Anderson

Sears

et al. 2019

J Americ Oil Chem Soc

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Biodiesel is a renewable fuel used in diesel engines that is typically blended with diesel fuel. However, biodiesel is susceptible to oxidation, which has the potential to produce higher molecular weight materials that may adversely impact vehicle fuel-system performance. To investigate the chemical reactions potentially important in biodiesel oxidation, four different types of chemical reactions involving esters were studied: (1) ester formation (reactions of acids with alcohols), (2) alcoholysis (reactions of alcohols with esters), (3) acidolysis (reaction of acids with esters), and (4) ester exchange (reactions between two esters). Experiments with representative model compounds were used to evaluate these reactions at 90 C with aeration; conditions previously used to simulate thermooxidative degradation during biodiesel aging. Reactions were monitored using gas chromatography, fourier transform infrared (FTIR) spectroscopy, and total acid number (TAN). Evidence is presented suggesting that alcoholysis and ester formation (Reactions 1 and 2), catalyzed by carboxylic acids, are important reactions of esters that could lead to larger molecules. Acidolysis (Reaction 3) proceeded at a comparatively slow rate and ester exchange reaction products (Reaction 4) were not detected under these aging conditions.

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Section: Resultsmentioning

confidence: 99%