\The role of radical species in diesel engine auto-ignition detection

2001 ◽  
Author(s):  
F. E. Corcione ◽  
M. Costa ◽  
B. M. Vaglieco ◽  
A. De Maio
Keyword(s):  
Diesel Engine ◽  
Radical Species ◽  
Auto Ignition

Role of binary and ternary blends of WCO biodiesel on emission reduction in diesel engine

Fuel ◽  
2020 ◽  
Vol 262 ◽  
pp. 116604 ◽  
Author(s):  
Saumitra Mishra ◽  
Ankitkumar Chauhan ◽  
Kirti Bhushan Mishra
Keyword(s):  
Diesel Engine ◽  
Emission Reduction ◽  
Ternary Blends

scholarly journals The role of the liver in the production of free radicals during halothane anaesthesia in the rat. Quantification of N-tert-butyl-alpha-(4-nitrophenyl)nitrone (PBN)-trapped adducts in bile from halothane as compared with carbon tetrachloride

1991 ◽  
Vol 277 (3) ◽  
pp. 795-800 ◽  
Author(s):  
H M Hughes ◽  
I M George ◽  
J C Evans ◽  
C C Rowlands ◽  
G M Powell ◽  
...  
Keyword(s):  
Free Radicals ◽  
Spin Trap ◽  
Halothane Anaesthesia ◽  
Perfused Liver ◽  
Radical Species ◽  
Tert Butyl ◽  
Biliary Elimination ◽  
Ccl4 Administration ◽  
Liver Preparation

Halothane or CCl4 was co-administered with the spin trap N-tert-butyl-alpha-(4-nitrophenyl)nitrone (PBN) to rats fitted with bile duct cannuli or to isolated perfused liver preparations. Rats maintained under halothane anaesthesia generated significant amounts of free radicals, and 5-9 nmol was excreted in bile over 1 h. No adducts were detected in urine or plasma. The hepatic origin of these free radicals was confirmed by studies on isolated perfused livers where the addition of halothane to the perfusate resulted in the biliary elimination of the same PBN-trapped radical adducts. Similarly, following CCl4 administration, the same radical species were eliminated in bile in the whole animal and the perfused liver preparation. In the perfused liver, over 3 h the total biliary elimination of radicals derived from halothane or CCl4 (administered at equimolar concentrations) was approximately the same (5-7 nmol); however, the elimination of halothane-derived radicals was more rapid over the first 1 h.

Experimental and Theoretical Aspects of Fuelling a Diesel Engine with Liquefied Petroleum Gases

2014 ◽  
Vol 659 ◽  
pp. 211-216
Author(s):  
Nikolaos Cristian Nutu ◽  
Constantin Pana ◽  
Alexandru Dobre ◽  
Niculae Negurescu ◽  
Alexandru Cernat
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Engine Speed ◽  
Alternative Fuel ◽  
Pollutant Emissions ◽  
Experimental Investigations ◽  
Smoke Emission ◽  
Full Load ◽  
Auto Ignition ◽  
Alternative Solutions

The severe legislation regarding pollution from actual time determine us to find new alternative solutions for diesel engine fuelling. This paper objective is the use of LPG as alternative fuel at a diesel engine in the purpose of pollutant emissions level decreasing in general and especially of NOx and smoke emissions. Is difficult to use LPG as single fuel at the diesel engine because it has an high auto ignition endurance (CN = -3). There are many fuelling methods of the diesel engine with LPG, but the authors of this paper used the diesel-gas method for a 1,5 l engine fuelling. The research followed the establishment of the optimal LPG cyclic dose and the diesel engine adjustments for different engine operating regimen. The paper presents results of some theoretical and experimental investigations of the LPG fuelled diesel engine. Three substitute ratios of diesel fuel with LPG were taken into account for full load and 2000 rpm engine speed. Thus, the NOx emissions decreased with 20-28 % for different substitute ratios of diesel fuel with LPG. The smoke emission decreased with 35-47% for same substitute ratios. LPG fuelling represents a very good solution for a cleaner environment.

Effect of Cetane Improver on Combustion and Emission Characteristics of Coal-Derived Sasol Isomerized Paraffinic Kerosene in a Single Cylinder Diesel Engine

2015 ◽  
Vol 137 (7) ◽  
Author(s):  
Ziliang Zheng ◽  
Umashankar Joshi ◽  
Naeim Henein ◽  
Eric Sattler
Keyword(s):  
Diesel Engine ◽  
Cetane Number ◽  
Control Unit ◽  
Injection System ◽  
Oxides Of Nitrogen ◽  
Single Cylinder ◽  
Common Rail Injection System ◽  
Air Temperatures ◽  
Auto Ignition ◽  
Ignition Quality

Sasol isomerized paraffinic kerosene (IPK) is a coal-derived synthetic fuel under consideration as a blending stock with JP-8 for use in military ground vehicles. Since Sasol IPK is a low ignition quality fuel with derived cetane number (DCN) of 31, there is a need to improve its ignition quality. This paper investigates the effect of adding different amounts of Lubrizol 8090 cetane improver to Sasol IPK on increasing its DCN. The experimental investigation was conducted in a single cylinder research type diesel engine. The engine is equipped with a common rail injection system and an open engine control unit. Experiments covered different injection pressures and intake air temperatures. Analysis of test results was made to determine the effect of cetane improver percentage in the coal-derived Sasol IPK blend on auto-ignition, combustion and emissions of carbon monoxide (CO), total unburned hydrocarbon (HC), oxides of nitrogen (NOx), and particulate matter (PM). In addition, the effect of cetane improver on the apparent activation energy of the global auto-ignition reactions was determined.

An Analytical Study of the Compression Ignition Characteristics of H2-O2-N2 Mixtures in a Reciprocating Engine

1974 ◽  
Vol 16 (2) ◽  
pp. 88-94 ◽  
Author(s):  
G. A. Karim ◽  
M. Rashidi ◽  
M. Taylor
Keyword(s):  
Analytical Study ◽  
Pure Oxygen ◽  
Cylinder Pressure ◽  
Oxides Of Nitrogen ◽  
Detailed Chemical Kinetics ◽  
Reciprocating Engine ◽  
Auto Ignition ◽  
Ignition Characteristics ◽  
Detailed Chemical

A large portion of the literature about the use of hydrogen as a fuel in air-breathing reciprocating engines is devoted to the problems of auto-ignition and knock. Operation with oxygen-enriched air or pure oxygen, which in principle can reduce or even eliminate the production of oxides of nitrogen, is expected to be potentially more troublesome in this respect. The paper describes an analytical approach, incorporating detailed chemical kinetics, to the combustion of H2-O2-N2 mixtures in a reciprocating engine. The role of various operating parameters was determined primarily in relation to the length of the ignition delay and the associated peak values of cylinder pressure and temperature. Also, the extent of production of oxides of nitrogen in the exhaust was examined in terms of cycle parameters and the oxygen index of the charge.

The role of moisture adsorption in the auto-ignition of hygroscopic materials

1983 ◽  
Vol 6 (2) ◽  
pp. 143-145 ◽  
Author(s):  
Anders Hallström ◽  
Kenneth Werling
Keyword(s):  
Moisture Adsorption ◽  
Auto Ignition

Role of nano-additive blended biodiesel on emission characteristics of the research diesel engine

2019 ◽  
Vol 16 (6) ◽  
pp. 435-441 ◽  
Author(s):  
Ganaram Ramakrishnan ◽  
Purushothaman Krishnan ◽  
Sivasubramanian Rathinam ◽  
Thiyagu R ◽  
Yuvarajan Devarajan
Keyword(s):  
Diesel Engine ◽  
Emission Characteristics
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