Average molecular characterization of the soluble organic fraction of mature diesel particulate matter

Álvarez, Arnaldo; Hernández-Ortiz, Juan P.; López, Andrés; Agudelo, John R.

doi:10.1016/j.combustflame.2017.05.022

Cited by 12 publications

(7 citation statements)

References 50 publications

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“…In this paper, the pyrolysis test of methanol/biodiesel combustion particulates was carried out to analyze the volatilization and oxidation of particulates. SOF in diesel engine particulates was mainly composed of branched alkanes and n -alkanes, and its content was greatly affected by combustion temperature in the diesel engine . When the combustion temperature was lower, the dry soot finds it easy to adsorb and agglomerate more SOF components.…”

Section: Resultsmentioning

confidence: 99%

“…SOF in diesel engine particulates was mainly composed of branched alkanes and n-alkanes, and its content was greatly affected by combustion temperature in the diesel engine. 19 When the combustion temperature was lower, the dry soot finds it easy to adsorb and agglomerate more SOF components. References 20 and 21 showed that the main source of SOF in the methanol combustion process was pyrolysis of unburned esters.…”

Section: Volatility Of Particulatesmentioning

confidence: 99%

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Study on Particulate Structure Characteristics of Diesel Engines Fueled with a Methanol/Biodiesel Blend

Zhong

Tang

et al. 2021

ACS Omega

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Methanol and biodiesel are both alternative fuels of diesel engines. In order to study the effects of methanol on the microstructure of particulates produced from the diesel engine fueled with a methanol/biodiesel blend, the methanol/biodiesel blend fuels with 0, 10, and 20% methanol were prepared (named B100, BM10, and BM20, respectively). SEM and TG experiments have been carried out, and the structural and oxidative characteristics of particulates for the methanol/biodiesel blend were investigated. The results showed that the average diameters of B100, BM10, and BM20 particulates were 35, 32.6, and 31.2 nm, respectively. With the increase of methanol blending ratio, the H2O and SOF (soluble organic fraction) contents were increased and the soot content in particulates was reduced slightly. In addition, the activation energy of the particulate pyrolysis reaction was reduced with the increase of methanol mixing ratio, and the oxidative reaction of particulates was easier to carry out.

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Section: Resultsmentioning

confidence: 99%

Section: Volatility Of Particulatesmentioning

confidence: 99%

Study on Particulate Structure Characteristics of Diesel Engines Fueled with a Methanol/Biodiesel Blend

Zhong

Tang

et al. 2021

ACS Omega

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“…The TGA technique can be used to simulate the oxidation process to investigate the oxidation rates and oxidation temperature. , TGA was conducted on a Mettler Toledo TGA/DSWC3+ thermal gravimetric analyzer with the temperature accuracy of ±0.1 °C and a resolution of 0.1 μg. For each test, about 10 mg of a particulate sample was scraped off the quartz filter to the Al 2 O 3 crucible.…”

Section: Methodsmentioning

confidence: 99%

Impact of n-Hexanol Blending on Morphology, Nanostructure, Graphitization, and Oxidation Characteristics of Diesel Particles

Wang

et al. 2020

Energy Fuels

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As a promising alternative fuel with favorable properties and attractive prospects, the application of n-hexanol in diesel engines has aroused the interest of researchers. This study investigated the effects of mixing with n-hexanol on the morphology, nanostructure, graphitization, and oxidation reactivity of soot particles generated from a diesel engine. Experiments were performed on a turbocharged, four-cylinder direct-injection diesel engine fueled with D100 (neat diesel fuel), DH15 (15% nhexanol and 85% diesel, v/v), and DH30 (30% n-hexanol and 70% diesel, v/v), respectively. Under the constant torque of 125 N•m, two typical speeds of 1370 and 2150 rpm were selected. Transmission electron microscopy (TEM), Raman spectroscopy (RS), and thermogravimetric analysis (TGA) were used to characterize particulate samples. TEM images showed that DH15 and DH30 particles had smaller primary particle diameters in comparison with neat diesel particles. Moreover, with the increase of the nhexanol content in mixtures, the interlayer distance increased, indicating a more disordered nanostructure. RS results showed that soot samples generated from n-hexanol/diesel blended fuels had a lower degree of graphitization with larger I D1 /I G and A D1 /A G and more amorphous carbon with larger I D3 /I G and A D3 /A G . Based on TGA, it can be deduced that the DH30 soot sample obtained at the engine speed of 1370 rpm was easier to be oxidized in the DPF regeneration process for an 8.23% reduction in T max compared with D100 soot. Furthermore, activation energy of soots sampled at the engine speed of 2150 rpm decreased from 123.0 kJ/mol for D100 soot, to 109.6 kJ/mol for DH15 soot, and to 101.2 kJ/mol for DH30 soot, respectively. Regarding the effect of engine speeds on physicochemical characteristics of particles, results showed that the soot has higher oxidation activity under higher engine speed.

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“…15 Na análise de combustíveis, as principais regiões de interesse são as referentes aos grupos de hidrogênios alifáticos, aromáticos e olefínicos, cujos deslocamentos químicos são consolidados na literatura. 10,[16][17][18][19] Outra técnica bastante empregada no estudo de combustíveis devido principalmente ao seu baixo custo e simplicidade é a espectroscopia na região do infravermelho próximo (NIR). A capacidade do NIR em obter informações sobre ligações químicas distintas permite estudar os compostos constituintes da gasolina, etanol e óleo diesel a partir de grupos funcionais moleculares do tipo C-H, S-H, N-H e O-H que absorvem frequências na faixa de 4.000-14.000 cm -1 .…”

Section: Artigounclassified

Análise De Amostras De Combustíveis Por Fotometria, Nir Portátil E RMN De 1 H – Uma Comparação Com Os Resultados Encontrados Por Técnicas Normatizadas

et al. 2020

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It has been recurring adulterations in fuels (such as gasoline, ethanol and diesel), being necessary the exploration of the use of more modern analytical techniques capable of controlling the quality of these fuels, since some regulated tests may be inefficient to detect the adulteration. Among them, it is highlighted proton nuclear magnetic resonance (1 H NMR) spectroscopy, and portable near infrared spectroscopy (microNIR). In this work, it was studied the conformities of 115 samples of seized fuels (76 of gasoline, 23 of ethanol, and 16 of diesel) by means of standardized techniques with parameters established by the ANP. Results obtained were compared to photometer, MicroNIR and 1 H NMR analyzes. The analyzes carried out by ANP showed four nonconforming samples (one of gasoline and three of ethanol). By the photometric technique, only 14 gasoline samples had ethanol content permitted by legislation (i.e ≈ 27 %v/v). By 1 H NMR analysis, it was possible to verify nonconformities by presence of aromatics and olefins compounds in the gasoline and diesel samples as well as of methanol in fuel ethanol samples. It is also worth noting the efficiency of MicroNIR when combined with unsupervised chemometric methods to indicate nonconformities presented by 1 H NMR and photometry techniques.

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Average molecular characterization of the soluble organic fraction of mature diesel particulate matter

Cited by 12 publications

References 50 publications

Study on Particulate Structure Characteristics of Diesel Engines Fueled with a Methanol/Biodiesel Blend

Study on Particulate Structure Characteristics of Diesel Engines Fueled with a Methanol/Biodiesel Blend

Impact of n-Hexanol Blending on Morphology, Nanostructure, Graphitization, and Oxidation Characteristics of Diesel Particles

Análise De Amostras De Combustíveis Por Fotometria, Nir Portátil E RMN De 1 H – Uma Comparação Com Os Resultados Encontrados Por Técnicas Normatizadas

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