The Experts below are selected from a list of 1815 Experts worldwide ranked by ideXlab platform
A R Masri - One of the best experts on this subject based on the ideXlab platform.
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influence of biodiesel carbon chain length on in cylinder soot processes in a small bore optical diesel engine
Fuel, 2019Co-Authors: Renlin Zhang, P X Pham, Sanghoon Kook, A R MasriAbstract:Abstract This study examines the effects of biodiesel carbon chain length on the development of high-temperature flame and soot in single-cylinder, light-duty, optical diesel engine. Planar laser-induced fluorescence of OH (OH-PLIF) and laser-induced incandescence (soot-PLII) are performed separately using petroleum diesel and two biodiesel surrogate fuels. The selected surrogate fuels have a Saponification Number (SN) of 330 and 233 for shorter and longer carbon chain length, respectively, while the iodine value (IV) characterising the degree of unsaturation is kept similar. The laser-based images are shown together with the chemiluminescence images of naturally occurring cool-flame signals and electronically excited OH (OH∗). The start of high-temperature reaction timing was matched for the tested fuels by adjusting the injection timing so that the in-cylinder ambient conditions at the start of combustion were consistent. The results show that the longer carbon chain biodiesel has shorter ignition delay time, which makes a significant impact on the spatial and temporal development of high-temperature reaction zones. The OH signals for the longer carbon chain length biodiesel are observed close to the piston-bowl wall whereas they appear later in the penetrating front of the wall-interacting jet for the shorter carbon chain length biodiesel. Both fuels show soot formation occurring in the wall-jet head region while the longer carbon chain length biodiesel has higher soot concentration and larger area than that of the shorter carbon chain biodiesel. This is due to lower pre-combustion mixing, reduced fuel oxygen content, and possibly less significant OH-induced soot oxidation.
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Influence of biodiesel carbon chain length on in-cylinder soot processes in a small bore optical diesel engine
'Elsevier BV', 2019Co-Authors: Zhang R, P X Pham, Kook S, A R MasriAbstract:© 2018 Elsevier Ltd This study examines the effects of biodiesel carbon chain length on the development of high-temperature flame and soot in single-cylinder, light-duty, optical diesel engine. Planar laser-induced fluorescence of OH (OH-PLIF) and laser-induced incandescence (soot-PLII) are performed separately using petroleum diesel and two biodiesel surrogate fuels. The selected surrogate fuels have a Saponification Number (SN) of 330 and 233 for shorter and longer carbon chain length, respectively, while the iodine value (IV) characterising the degree of unsaturation is kept similar. The laser-based images are shown together with the chemiluminescence images of naturally occurring cool-flame signals and electronically excited OH (OH∗). The start of high-temperature reaction timing was matched for the tested fuels by adjusting the injection timing so that the in-cylinder ambient conditions at the start of combustion were consistent. The results show that the longer carbon chain biodiesel has shorter ignition delay time, which makes a significant impact on the spatial and temporal development of high-temperature reaction zones. The OH signals for the longer carbon chain length biodiesel are observed close to the piston-bowl wall whereas they appear later in the penetrating front of the wall-interacting jet for the shorter carbon chain length biodiesel. Both fuels show soot formation occurring in the wall-jet head region while the longer carbon chain length biodiesel has higher soot concentration and larger area than that of the shorter carbon chain biodiesel. This is due to lower pre-combustion mixing, reduced fuel oxygen content, and possibly less significant OH-induced soot oxidation
N M Nahar - One of the best experts on this subject based on the ideXlab platform.
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prospects and potential of fatty acid methyl esters of some non traditional seed oils for use as biodiesel in india
Biomass & Bioenergy, 2005Co-Authors: Mohibbe M Azam, Amtul Waris, N M NaharAbstract:Fatty acid profiles of seed oils of 75 plant species having 30% or more fixed oil in their seed/kernel were examined. Saponification Number (SN), iodine value (IV) and cetane Number (CN) of fatty acid methyl esters of oils were empirically determined and they varied from 169.2 to 312.5, 4.8 to 212 and 20.56 to 67.47, respectively. Fatty acid compositions, IV and CN were used to predict the quality of fatty acid methyl esters of oil for use as biodiesel. Fatty acid methyl ester of oils of 26 species including Azadirachta indica, Calophyllum inophyllum, Jatropha curcas and Pongamia pinnata were found most suitable for use as biodiesel and they meet the major specification of biodiesel standards of USA, Germany and European Standard Organization. The fatty acid methyl esters of another 11 species meet the specification of biodiesel standard of USA only. These selected plants have great potential for biodiesel.
A S Alkhalifa - One of the best experts on this subject based on the ideXlab platform.
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physicochemical characteristics fatty acid composition and lipoxygenase activity of crude pumpkin and melon seed oils
Journal of Agricultural and Food Chemistry, 1996Co-Authors: A S AlkhalifaAbstract:Physicochemical characteristics and fatty acid composition of crude oil and lipoxygenase activity of six varieties of pumpkin and melon seeds were investigated. Data obtained for the iodine value, Saponification Number, and acid value compare well with those of other edible oils. The major fatty acid in total lipid was 18:2 (n = 6), representing 68.7% for Citrullus lanatus (Chinese), 65% for C. colocynthis, 63.7% for C. lanatus (Iranian), 62% for C. lanatus (Egyptian), 53% for Cucurbita moschata, and 43% for Cucurbita pepo. Lipoxygenase activities varied among seeds. The residual enzyme activities after roasting were different among the six varieties and were in the range of 0−60% of the original activity. Keywords: Pumpkin; melon; lipoxygenase; physicochemical characteristics
Renlin Zhang - One of the best experts on this subject based on the ideXlab platform.
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influence of biodiesel carbon chain length on in cylinder soot processes in a small bore optical diesel engine
Fuel, 2019Co-Authors: Renlin Zhang, P X Pham, Sanghoon Kook, A R MasriAbstract:Abstract This study examines the effects of biodiesel carbon chain length on the development of high-temperature flame and soot in single-cylinder, light-duty, optical diesel engine. Planar laser-induced fluorescence of OH (OH-PLIF) and laser-induced incandescence (soot-PLII) are performed separately using petroleum diesel and two biodiesel surrogate fuels. The selected surrogate fuels have a Saponification Number (SN) of 330 and 233 for shorter and longer carbon chain length, respectively, while the iodine value (IV) characterising the degree of unsaturation is kept similar. The laser-based images are shown together with the chemiluminescence images of naturally occurring cool-flame signals and electronically excited OH (OH∗). The start of high-temperature reaction timing was matched for the tested fuels by adjusting the injection timing so that the in-cylinder ambient conditions at the start of combustion were consistent. The results show that the longer carbon chain biodiesel has shorter ignition delay time, which makes a significant impact on the spatial and temporal development of high-temperature reaction zones. The OH signals for the longer carbon chain length biodiesel are observed close to the piston-bowl wall whereas they appear later in the penetrating front of the wall-interacting jet for the shorter carbon chain length biodiesel. Both fuels show soot formation occurring in the wall-jet head region while the longer carbon chain length biodiesel has higher soot concentration and larger area than that of the shorter carbon chain biodiesel. This is due to lower pre-combustion mixing, reduced fuel oxygen content, and possibly less significant OH-induced soot oxidation.
Mohibbe M Azam - One of the best experts on this subject based on the ideXlab platform.
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prospects and potential of fatty acid methyl esters of some non traditional seed oils for use as biodiesel in india
Biomass & Bioenergy, 2005Co-Authors: Mohibbe M Azam, Amtul Waris, N M NaharAbstract:Fatty acid profiles of seed oils of 75 plant species having 30% or more fixed oil in their seed/kernel were examined. Saponification Number (SN), iodine value (IV) and cetane Number (CN) of fatty acid methyl esters of oils were empirically determined and they varied from 169.2 to 312.5, 4.8 to 212 and 20.56 to 67.47, respectively. Fatty acid compositions, IV and CN were used to predict the quality of fatty acid methyl esters of oil for use as biodiesel. Fatty acid methyl ester of oils of 26 species including Azadirachta indica, Calophyllum inophyllum, Jatropha curcas and Pongamia pinnata were found most suitable for use as biodiesel and they meet the major specification of biodiesel standards of USA, Germany and European Standard Organization. The fatty acid methyl esters of another 11 species meet the specification of biodiesel standard of USA only. These selected plants have great potential for biodiesel.
