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Wednesday, August 5, 2020 | History

2 edition of Oxidation studies of surrogate bio-diesel fuels in opposed flow diffusion flames. found in the catalog.

Oxidation studies of surrogate bio-diesel fuels in opposed flow diffusion flames.

Sajid Ahmed Syed

Oxidation studies of surrogate bio-diesel fuels in opposed flow diffusion flames.

by Sajid Ahmed Syed

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  • 9 Currently reading

Published .
Written in English


About the Edition

This thesis is based on experimental studies carried out with an opposed-flow, diffusion flame to investigate (i) the effect of fatty acid methyl ester (FAME) molecular structure on flame structure and (ii) the accuracy of existing detailed chemical kinetic mechanism of methyl butanoate, a surrogate of bio-diesel.The experiments involve measurement of species concentration and temperature due to combustion of methyl butanoate in an opposed-flow diffusion flame. Studies have also been performed on the flame structure of methyl crotonate, an ester of 2-butenoic acid, in order to observe the effect of the double bond on the chemical kinetics of methyl crotonate and, in general, larger unsaturated bio-diesel molecules.The analysis of the flame samples was performed using a Gas Chromatograph and an NDIR analyzer.

The Physical Object
Pagination95 leaves.
Number of Pages95
ID Numbers
Open LibraryOL19217407M
ISBN 100494074140

Yeung C, Thomson MJ () Experimental and kinetic modeling study of 1-hexanol combustion in an opposed-flow diffusion flame. Proc Combust Inst – Google Scholar Yu W, Chen G, Huang Z et al () Experimental and kinetic modeling study of methyl butanoate and methyl butanoate/methanol flames at different equivalence ratios and c/o. Metals, free fatty acids, acidic fuel additives, the size of the alcohol group (for mono-esters), and the presence of natural antioxidants can all impact the oxidative stability of fatty oils and/or esters. Oxidation can also be catalyzed by light, but such photo-oxidation should not be a.

The oxidation of a commercial B30 (30% FAME by vol.) bio-Diesel fuel and a B30 bio-Diesel surrogate fuel (49% n-decane, CAS ; 21% 1-methylnaphthalene, CAS . Oxidation Stability of the Bio-diesel Fuels by the Rancimat Test Method The oxidation stability of bio-diesel (B) and bio-diesel blends (B2 to B99) is determined using prEN test method (11). This test is based on EN (12) and utilizes the Rancimat instrument that measures the induction time or oxidation stability index.

Book, Chapters Thomas Litzinger and Lisa R. Lattuca, , Translating research into instructional practice in engineering education, Cambridge University Press, New York, pp. Lisa R. Lattuca and Thomas Litzinger, , Studying teaching and learning in engineering programs: Conceptual frameworks and future directions, Cambridge. ASTM recently released an oxidation stability test method specifically for B biodiesel and blends of biodiesel with middle distillate petroleum fuel designated D In time, this new test method will be incorporated into the D and D standard specifications.


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Oxidation studies of surrogate bio-diesel fuels in opposed flow diffusion flames by Sajid Ahmed Syed Download PDF EPUB FB2

This skeletal mechanism containing only species was applied to study the methyl oleate oxidation in an opposed-flow diffusion flame and the combustion phasing under the diesel engine conditions. The oxidation of methyl hexanoate has been studied experimentally in a jet-stirred reactor at 10 atm and a constant residence time of 1 s, over the temperature range – K and for fuel-lean to fuel-rich conditions.

Concentration profiles of reactants, stable intermediates, and final products have been obtained by sonic probe sampling followed by online and offline GC by:   The experimental study of the oxidation of two blend surrogates for diesel and biodiesel fuels, n-decane/n-hexadecane and n-decane/methyl palmitate (74/26 mol/mol), has been performed in a jet-stirred reactor over a wide range of temperatures covering both low, and high-temperature regions (– K), at a residence time of s, at quasi atmospheric pressure with high dilution in helium Cited by:   The oxidation of a commercial B30 (30% FAME by vol.) bio-Diesel fuel and a B30 bio-Diesel surrogate fuel (49% n-decane, CAS ; 21% 1-methylnaphthalene, CAS ; 30% methyl octanoate, CASin mole) was performed using a pressurized fused-silica jet-stirred reactor under the same initial experimental conditions (– K, 6 and 10 atm, equivalence ratios Cited by:   Experimental and kinetic modeling of methyl octanoate oxidation in an opposed-flow diffusion flame and a jet-stirred reactor.

Proceedings of the Combustion Institute33 (1), DOI: /ited by: In addition, new experimental data generated in an opposed-flow diffusion flame at MPa and in the Princeton variable pressure flow reactor (VPFR) at MPa, Kinetic modeling studies on hexanol oxidation and combustion have been carried out in a jet-stirred reactor [] and opposed flow diffusion flame [].

Experimental data on reaction pathways. McNesby and co-workers [11] conducted experiments in opposed flow ethylene/air diffusion flames to understand the effects of ethanol addition to either the fuel or the oxidizer streams.

They found. A skeletal mechanism with species and reactions was developed from a detailed LLNL mechanism that consisted of species and reactions for a tricomponent surrogate mixture, consisting of methyl decanoate, methydecenoate, and n-heptane, which is suitable for combustion modeling of biodiesel derived from various feedstocks.

These studies have been complemented by modelling using the PREMIX module of Chemkin to provide insights into and to validate combined models describing the oxidation chemistry of surrogate fuels depicting kerosene, fatty acid methyl ester biofuels and Fischer-Tropsch derived fuels.

An experimental study on the flow characteristics under various laminar coflow diffusion flames was conducted with a particular focus on the buoyancy force exerted from gaseous hydrocarbon fuels.

A Soot Formation Embedded Reduced Reaction Mechanism for Diesel Surrogate Fuel,” A Fortran Program for Computing Opposed-Flow Diffusion Flames,” Report No.

SAND96–, Sandia Laboratories, Albuquerque, NM. Seery, D. J., and. Bowman, C. T.,“ An Experimental and Analytical Study of Methane Oxidation Behind Shock Waves. In an effort to help determine the fidelity of simple surrogate fuels to represent real fuel chemistry in computational fluid dynamic simulations of engines, quantitative two-dimensional soot volume fraction measurements were made in a laminar coflow methane–air diffusion flame seeded with approximately ppm of real and surrogate fuels.

Surrogate fuels are used to mimic the behavior of a real fuel in various combustion devices, and the definition and complexity of the surrogate fuel formulation depend on the intended applications. Three different types of targets, property targets, development targets, and application targets, have been proposed to quantitatively compare the.

Hence, fuels of simpler chemical structure, referred to as surrogate fuels, are used to approximate or represent processes involved in the combustion of these real fuels, as reported by Dooley. et al. [6], [7] and Francisco [8]. In this regard, esters with a low number of carbon atoms are adopted as surrogate fuels.

Liming Cai, Alena Sudholt, Dong Joon Lee, Fokion N. Egolfopoulos, Heinz Pitsch, Charles K. Westbrook and S. Mani Sarathy, Chemical kinetic study of a novel lignocellulosic biofuel: Di-n-butyl ether oxidation in a laminar flow reactor and flames, Combustion and Flame,3, (), ().

Yu Wang, Sungwoo Park, S. Mani Sarathy and Suk Ho Chung, A comparative study on the sooting tendencies of various 1-alkene fuels in counterflow diffusion flames, Combustion and Flame, /tflame,(), (). There has been considerable progress in the area of fuel surrogate development to emulate gasoline fuels’ oxidation properties.

The current paper aims to review the relevant hydrocarbon group components used for the formulation of gasoline surrogates, review specific gasoline surrogates reported in the literature, outlining their utility and deficiencies, and identify the future research.

1. Introduction. Gasoline fuel consists of several hydrocarbon groups including straight and branched chain aliphatics together with aromatics.

Among them, n-heptane (nC 7 H 16), iso-octane (iC 8 H 18) and toluene (C 6 H 5 CH 3) are recognized as the primary constituents in representing gasoline surrogate ly, several theoretical,, and experimental studies. were simulated using n-heptane and 1-heptene fuels. Table 1 lists the five flames in terms of ϕ analyzed in the present study.

Here, ϕ = 2, 4, and 8 correspond to PPFs, while ϕ = 20 and ∞ represent diffusion flames. For all of the flames, the fuel stream was introduced from the bottom nozzle and the oxidizer was introduced from the top nozzle.

Anne Geraldine Mouis, Thomas Litzinger, Yefu Wang, Venkatesh Iyer, Suresh S Iyer, Milton Linevsky, Robert J Santoro and Viswanath Katta,"Effects of a JP-8 surrogate and its components on soot in laminar, Ndiluted ethylene co-flow diffusion flames from 1 to 5 atm", COMBUSTION AND FLAME,(5), pp.

The primary objectives of this work were to formulate, blend, and characterize a set of four ultralow-sulfur diesel surrogate fuels in quantities sufficient to enable their study in single-cylinder-engine and combustion-vessel experiments.

The surrogate fuels feature increasing levels of compositional accuracy (i.e., increasing exactness in matching hydrocarbon structural characteristics.A STUDY ON THE SOOTING TENDENCY OF JET FUEL SURROGATES USING THE THRESHOLD SOOT INDEX A Thesis in are a key step toward modeling new engines and new fuels.

For the surrogate to simulate the real fuel, the composition must be designed to reproduce Figure 5 Photograph taken of an iso-octane/toluene diffusion flame at the smoke point.