Effects of Dimethoxy Methane Blended with Gas-to-Liquids on Particulate Matter Emissions from a Compression-Ignition Engine

2008 ◽  
Vol 22 (4) ◽  
pp. 2307-2313 ◽  
Author(s):  
Wei Liu ◽  
Zhen Huang ◽  
Jiasong Wang ◽  
Xinqi Qiao ◽  
Junxin Hou
Keyword(s):  
Particulate Matter ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Particulate Matter Emissions ◽  
Gas To Liquids

Dilution Sensitivity of Particulate Matter Emissions From Reactivity Controlled Compression Ignition Combustion

2015 ◽  
Author(s):  
Wei Fang ◽  
David B. Kittelson ◽  
William F. Northrop
Keyword(s):  
Particulate Matter ◽  
Diesel Combustion ◽  
Compression Ignition ◽  
Total Particulate Matter ◽  
Reactivity Controlled Compression Ignition ◽  
Carbonaceous Particles ◽  
Relative Contribution ◽  
Particulate Matter Emissions ◽  
Soot Emissions ◽  
Hydrous Ethanol

Dual-fuel reactivity-controlled compression ignition (RCCI) combustion can yield high thermal efficiency and simultaneously low NOx and soot emissions. Although soot emissions from RCCI is very low, hydrocarbon emissions are high, potentially resulting in higher than desired total particulate matter (PM) mass and number caused by semi-volatile species converting the particle phase upon primary dilution in the exhaust plume. Such high organic fraction PM is known to be highly sensitive to the dilution conditions used when collecting samples on a filter or when measuring particle number using particle sizing instruments. In this study, PM emissions from a modified single-cylinder diesel engine operating in RCCI and conventional diesel combustion modes were investigated under different dilution conditions. To investigate the effect of the fumigated fuel on the PM emissions, 150 proof hydrous ethanol and gasoline were used as low reactivity fuels to study the relative contribution of fumigant versus directly injected fuel on the PM emissions. Our study found that PM from RCCI combustion is more sensitive to the variation of dilution conditions than PM from single fuel conventional diesel combustion. RCCI PM primarily consisted of semi-volatile organic compounds and a smaller amount of solid carbonaceous particles. The fumigated fuel had a significant effect on the PM emissions characteristics for RCCI combustion. Hydrous ethanol fueled RCCI PM contained a larger fraction of volatile materials and were more sensitive to the variation of dilution conditions compared to the gasoline fueled RCCI mode.

scholarly journals Impact of Split and Re-Entrant Type Piston Bowl Geometry Fuelled with Pre Heated Diesel and Biodiesel on a Compression Ignition Engine Characteristics

2021 ◽  
Author(s):  
Mohan Das Akkur Neele Gowda ◽  
Hanumanahalli Kambadarangappa Shivanand ◽  
Harish Gangaiah ◽  
Bhaskar Hindisigere Bytarangaiah ◽  
Jagannatha Tumkur Doddaiah ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Research Study ◽  
Compression Ignition ◽  
Compression Ignition Engine ◽  
Renewable Fuel ◽  
Piston Bowl ◽  
Experimental Works ◽  
Ci Engine ◽  
Biodiesel Blend ◽  
Oil Crisis

Abstract The present investigation is carried out on biodiesel practicability over the existing non-renewable fuel due to its environmental dilapidation effect and oil crisis. Biodiesel was extracted from crude oil by transesterification, and its properties have been compared with those of neat diesel according to ASTM standards. Then, the blends of biodiesel are prepared for experimental analysis. Experimental results from our previous research study, the best blend was optimized. Then, the standard CI engine with Hemispherical Piston Bowl Geometry (HPBG) is modified to Toroidal or Split type Piston Bowl Geometry (TPBG) and Re-Entrant Piston Bowl Geometry (RPBG). Experimental works were carried out for preheated optimized blend, neat diesel with modified Piston Bowl Geometries. The engine characteristics results were compared with these altered conditions. The modified PBG with preheated biodiesel blend resulted in better Performance and Combustion characteristics. The preheated biodiesel blends indicated significant depletion in the emission of harmful particulate matter such as CO, NOx, and unburnt Hydrocarbons.

Experimental Study of Premixed-Charge Compression Ignition Mode in Low Load Fueled With Butanol Isomers and Diesel Binary Fuels in a Common-Rail Diesel Engine

2020 ◽  
Vol 142 (9) ◽  
Author(s):  
Zilong Li ◽  
Guan Huang ◽  
Chenxu Jiang ◽  
Yong Qian ◽  
Zhuoyao He ◽  
...  
Keyword(s):  
Experimental Study ◽  
Particulate Matter ◽  
Geometric Mean ◽  
Volume Ratio ◽  
Compression Ignition ◽  
Nox Formation ◽  
Tert Butanol ◽  
Low Load ◽  
Particulate Matter Emissions ◽  
Gas Recirculation

Abstract Low NOx and particulate matter (PM) emissions are simultaneously attempted to implement via an experimental study on diesel/butanol isomers binary fuels in premixed-charge compression ignition (PCCI) mode. N-butanol, iso-butanol, sec-butanol, and tert-butanol were blended with diesel in a certain volume ratio of 0.24:0.76, denoted as N24, I24, S24, and T24, respectively. The indicated thermal efficiency (ITE) of binary fuels in PCCI mode decreases slightly than that in direction injection (DI) mode. T24 obtains higher ITE than the other three test fuels with 50% exhaust gas recirculation (EGR). NOx formation is certainly inhibited more than 60% in PCCI mode, especially when the EGR rate is 50%. PCCI mode produces more CO, HC, and carbonyl emissions than DI mode to varying degrees; under these circumstances, T24 tends to have the lowest emissions among four test fuels, reflecting the potential of tert-butanol as a diesel alternative fuel. Butanol isomers have a vital contribution on particulate matter emissions inhibition for both PM total number and total mass. Tert-butanol tends to form accumulation mode particle, and n-butanol tends to form nucleation mode mainly caused by molecular structure diversity of isomers. The geometric mean diameter of diesel/butanol isomers increases in PCCI mode compared with that in DI mode.

Dilution Sensitivity of Particulate Matter Emissions From Reactivity-Controlled Compression Ignition Combustion

2017 ◽  
Vol 139 (3) ◽  
Author(s):  
Wei Fang ◽  
David B. Kittelson ◽  
William F. Northrop
Keyword(s):  
Particulate Matter ◽  
Semivolatile Organic Compounds ◽  
Diesel Combustion ◽  
Compression Ignition ◽  
Total Particulate Matter ◽  
Reactivity Controlled Compression Ignition ◽  
Carbonaceous Particles ◽  
Particulate Matter Emissions ◽  
Soot Emissions ◽  
Hydrous Ethanol

Dual-fuel reactivity-controlled compression ignition (RCCI) combustion can yield high thermal efficiency and simultaneously low NOx and soot emissions. Although soot emissions from RCCI are very low, hydrocarbon (HC) emissions are high, potentially resulting in higher than desired total particulate matter (PM) mass and number caused by semivolatile species converting the particle phase upon primary dilution in the exhaust plume. Such high organic fraction PM is known to be highly sensitive to dilution conditions used when collecting samples on a filter or when measuring particle number using particle sizing instruments. In this study, PM emissions from a modified single-cylinder diesel engine operating in RCCI and conventional diesel combustion (CDC) modes were investigated under controlled dilution conditions. To investigate the effect of the fumigated fuel on the PM emissions, 150 proof hydrous ethanol and gasoline were used as low reactivity fuels. The data reveal that PM from RCCI combustion is more sensitive to the variation of dilution conditions than PM from single fuel conventional diesel combustion. RCCI PM primarily consisted of semivolatile organic compounds and a smaller amount of solid carbonaceous particles. The fumigated fuel had a significant effect on PM emissions' characteristics for RCCI combustion. Hydrous ethanol fueled RCCI PM contained a larger fraction of volatile materials and was more sensitive to the variation of dilution conditions compared to the gasoline fueled RCCI mode.

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