Investigation of RCCI Characteristics of Combustion and Emissions With PFI of N-Butanol and Direct Injection of High Linoleic Content Biodiesel

2016 ◽  
Author(s):  
Valentin Soloiu ◽  
Tyler Naes ◽  
Martin Muiños ◽  
Alejandro Rivero-Castillo ◽  
Spencer Harp
Keyword(s):  
Linoleic Acid ◽  
Heat Release ◽  
Acid Content ◽  
Ignition Delay ◽  
Fuel Injection ◽  
Direct Injection ◽  
Linoleic Acid Content ◽  
High Linoleic Acid ◽  
High Linoleic Acid Content ◽  
Soot Emissions

This study investigated the RCCI (Reactivity Controlled Compression Ignition) of PFI (Port Fuel Injection) of n-butanol with direct injection (DI) of a high linoleic acid content biodiesel, cottonseed (CS100). The experimental omnivorous-fuel engine was operated at 1400 rpm and 6 bar indicated mean effective pressure (IMEP) with 20% cooled EGR. The mass ratio of n-butanol injected comprised of 50% of the total fuel mass. The dual fueling strategy of RCCI changed the conventional diesel combustion (CDC) apparent heat release profile. With the new fueling strategy the heat release was split into two regions of high temperature heat release when using CS100. The first occurred before top dead center (BTDC) from the high reactivity fuel and the second peak occurred due to the combustion of the low reactivity fuel (n-butanol) after top dead center (ATDC). ULSD did not produce this same split in heat release due to the longer ignition delay. The ignition delay for CS100 was shortened by 0.15 ms when compared to ULSD because of the high palmitic acid content in the biodiesel. The RCCI process itself extended the ignition delay about 0.17 ms (about 1.4 CAD) suggesting the possibility of controlling combustion phasing for both RCCI fueling strategies of ULSD and CS100. The CA50 occurred similarly at 10° ATDC for ULSD and CS100 however, RCCI shifted the CA50’s (7° and 8° ATDC for CS100 and ULSD respectively). Soot emissions exhibited a decrease with the PFI of n-butanol because of the highly oxygenated nature of the fuel by 80%. In summary, RCCI stratification using n-Butanol as the low reactivity fuel significantly reduced soot emissions when using either a high linoleic acid content biofuel or ULSD while also suggesting control over combustion phasing.

MEAT WITH HIGH LINOLEIC ACID CONTENT: OXIDATIVE CHANGES DURING FROZEN STORAGE

2008 ◽  
Vol 41 (4) ◽  
pp. 757-761 ◽  
Author(s):  
H. A. BREMNER ◽  
A. L. FORD ◽  
J. J. MACFARLANE ◽  
D. RATCLIFF ◽  
N. T. RUSSELL
Keyword(s):  
Linoleic Acid ◽  
Acid Content ◽  
Frozen Storage ◽  
Linoleic Acid Content ◽  
High Linoleic Acid ◽  
High Linoleic Acid Content

The molecular basis of the high linoleic acid content in Petunia seed oil: analysis of a seed-specific linoleic acid mutant

2000 ◽  
Vol 28 (6) ◽  
pp. 631-632 ◽  
Author(s):  
I. Verwoert ◽  
Y. Meller-Harel ◽  
K. van der Linden ◽  
B. Verbree ◽  
R. Koes ◽  
...  
Keyword(s):  
Linoleic Acid ◽  
Acid Content ◽  
Seed Oil ◽  
Lipid Fraction ◽  
Lipid Synthesis ◽  
Linoleic Acid Content ◽  
Specific Expression ◽  
High Linoleic Acid ◽  
High Linoleic Acid Content ◽  
Δ12 Desaturase

From a random transposon mutagenesis experiment, using Petunia line W138, a seed-specific linoleic acid mutant was isolated. The tagged gene was cloned and identified as a microsomal Δ12 desaturase. Expression of the gene, however, was constitutive and not, as might have been expected, seed-specific. Moreover, self-fertilized homozygous mutants still contain 40% 18:2 in the seed lipid fraction. This suggests that at least two (seedspecific) Δ12 desaturase genes are responsible for the high linoleic acid content in Petunia seed oil. Five members of the microsomal Δ12 desaturase gene family have been identified and isolated. Data are presented on the molecular characterization and tissue-specific expression of these genes, which suggest that, in Petunia the flux through the prokaryotic and eukaryotic pathways of lipid synthesis might be different from the situation found in Arabidopsis.

Selection of High Linoleic Acid Content in Summer Turnip Rape (Brassica campestrisL.)

1982 ◽  
Vol 32 (4) ◽  
pp. 397-404 ◽  
Author(s):  
I. Laakso ◽  
R. Hiltunen ◽  
S. Hovinen ◽  
M. Von Schantz ◽  
A. Huhtikangas
Keyword(s):  
Linoleic Acid ◽  
Acid Content ◽  
Linoleic Acid Content ◽  
High Linoleic Acid ◽  
Turnip Rape ◽  
High Linoleic Acid Content ◽  
Selection Of

Selection for high linoleic acid content in sunflower (Helianthus annuus L.)

1989 ◽  
Vol 29 (2) ◽  
pp. 233 ◽  
Author(s):  
BW Simpson ◽  
CM McLeod ◽  
DL George
Keyword(s):  
Linoleic Acid ◽  
Acid Content ◽  
Linoleic Acid Content ◽  
High Linoleic Acid ◽  
Breeding Lines ◽  
Wide Range ◽  
Total Fatty Acids ◽  
High Linoleic Acid Content ◽  
Selection For ◽  
Non Destructive

Inbred sunflower lines with high and stable levels of linoleic acid over a wide range of maturation temperatures have been produced. Normally linoleic acid (the polyunsaturated component of sunflower oil) is inversely proportional to temperature during seed maturation. During Queensland's hot summers, linoleic acid content may drop to <50%. Processors require a linoleic acid content of at least 62% of the total fatty acids in oil used for the production of polyunsaturated products, e.g. margarine. Four generations of breeding material (F2-F6 of Hysun 33xHysun 32) were grown and matured under hot summer conditions (approximately 30�C max., 18�C min.). The fatty acid composition of individual seeds was determined by non-destructive analysis, and sunflower breeding lines with up to 25% higher (actual) linoleic acid than the standard variety Hysun 32 (which averaged 48% linoleic acid when matured under hot summer conditions) have been produced.

scholarly journals Transfer of omega-3 linolenic acid and linoleic acid to milk fat from flaxseed or Linola protected with formaldehyde

2001 ◽  
Vol 81 (4) ◽  
pp. 525-532 ◽  
Author(s):  
J. Goodridge ◽  
J. R. Ingalls ◽  
G. H. Crow
Keyword(s):  
Linoleic Acid ◽  
Linolenic Acid ◽  
Acid Content ◽  
Milk Fat ◽  
Linoleic Acid Content ◽  
Omega 3 ◽  
High Linoleic Acid ◽  
Low Level ◽  
High Level ◽  
Dietary Treatments

Four Holstein cows were randomly assigned to four treatments in a 4 × 4 Latin square design. The primary objective of this study was to measure the transfer and increased level of omega-3 fatty acid C18:3 in milk by feeding sup plemental protected fat from flax and, second, to measure the transfer and increase in level of C18:2 by feeding supplemental protected fat from linola. The four dietary treatments were total mixed rations (TMR) plus i) control-no added fat, ii) high levels of protected Linola containing high linoleic acid content, iii) low level of protected flax containing high linoleic acid content and iv) high levels of protected flax containing high linolenic acid content. Linola is a variety of Solin containing approximately 74% linoleic acid, which was developed from flax. These supplements were added to the diet as a top dress and provided 454 g fat (high level) from the protected Linola product, 187 g fat (low level) from the protected flax product and 410 g fat (high level) from the protected flax product. Treatments had no effect on feed intake, milk yield or milk content of fat, protein or solids not fat. Medium chain fatty acids, C12:0 to C16:0, were significantly lower (P < 0.05) in the milk of cows fed supplemental fat. Milk stearic acid (C18:0) was significantly greater in the milk fat from cows fed Linola vs. control, but was unaffected by other dietary treatments. Milk linoleic acid (C18:2) was significantly higher at 10.3% in the milk of cows fed the protected Linola vs. the control at 4.8%. Linolenic acid (C18:3) was not affected by feeding Linola, but was significantly greater in the milk of cows fed the high level of protected flax (6.4% vs. 0.8% in the control). This represents an eightfold increase, while the low level of protected flax diet increased C18:3 by 3.9-fold in milk fat. Supplementing dairy cow diets with a formaldehyde-treated flax product at acceptable levels of fat for high producing cows results in a milk fat high in omega-3-linolenic acid. Key words: Flaxseed, cow, milk, fatty acids, linoleic acid, linolenic acid

RCCI of Synthetic Kerosene With PFI of N-Butanol-Combustion and Emissions Characteristics

2015 ◽  
Author(s):  
Valentin Soloiu ◽  
Martin Muiños ◽  
Tyler Naes ◽  
Spencer Harp ◽  
Marcis Jansons
Keyword(s):  
Thermal Efficiency ◽  
Fuel Injection ◽  
Direct Injection ◽  
Cetane Number ◽  
Engine Performance ◽  
Reactivity Controlled Compression Ignition ◽  
Ultra Low Sulfur Diesel ◽  
Indicated Mean Effective Pressure ◽  
Soot Emissions ◽  
Low Sulfur

In this study, the combustion and emissions characteristics of Reactivity Controlled Compression Ignition (RCCI) obtained by direct injection (DI) of S8 and port fuel injection (PFI) of n-butanol were compared with RCCI of ultra-low sulfur diesel #2 (ULSD#2) and PFI of n-butanol at 6 bar indicated mean effective pressure (IMEP) and 1500 rpm. S8 is a synthetic paraffinic kerosene (C6–C18) developed by Syntroleum and is derived from natural gas. S8 is a Fischer-Tropsch fuel that contains a low aromatic percentage (0.5 vol. %) and has a cetane number of 63 versus 47 of ULSD#2. Baselines of DI conventional diesel combustion (CDC), with 100% ULSD#2 and also DI of S8 were conducted. For both RCCI cases, the mass ratio of DI to PFI was set at 1:1. The ignition delay for the ULSD#2 baseline was found to be 10.9 CAD (1.21 ms) and for S8 was shorter at 10.1 CAD (1.12 ms). In RCCI, the premixed charge combustion has been split into two regions of high temperature heat release, an early one BTDC from ignition of ULSD#2 or S8, and a second stage, ATDC from n-butanol combustion. RCCI with n-butanol increased the NOx because the n-butanol contains 21% oxygen, while S8 alone produced 30% less NOx emissions when compared to the ULSD#2 baseline. The RCCI reduced soot by 80–90% (more efficient for S8). However, S8 alone showed a considerable increase in soot emissions compared with ULSD#2. The indicated thermal efficiency was the highest for the ULSD#2 and S8 baseline at 44%. The RCCI strategies showed a decrease in indicated thermal efficiency at 40% ULSD#2-RCCI and 42% and for S8-RCCI, respectively. S8 as a single fuel proved to be a very capable alternative to ULSD#2 in terms of combustion performance nevertheless, exhibited higher soot emissions that have been mitigated with the RCCI strategy without penalty in engine performance.

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