Impact Study of High Biodiesel Blends on Performance of Exhaust Aftertreatment Systems

Fukuda, Kota; Kohakura, Masaru; Kaneko, Takashi; Furui, Katsuro; Tsuchihashi, Keiichi; Hasegawa, Tsutomu; Saitou, Kazuhisa; Baba, Hiromitsu; Shibuya, Masabumi; Nakamura, Osamu; Okada, Masanori; Hosono, Kyouji; Hirata, Kiminobu; Kawatani, Toru; Sugiyama, Gen

doi:10.4271/2008-01-2494

Cited by 11 publications

(8 citation statements)

References 3 publications

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“…However, as stated in their paper, the effect of the different PM/NO 2 ratio on the BET was not very much explored. Similar conclusions on BET were commented in other studies [33,34], although in some cases controversial results were found [35,36] with low content biodiesel blends.…”

Section: Introductionsupporting

confidence: 79%

“…For both samples, a high fraction (more than 50%) of PM mass is the Volatile Organic Fraction (VOF), since samples have been collected during engine operation at low load and low speed [56,57]. As observed in several studies [6,9,35,36,42], the comparison of two samples highlights both a higher VOF in the B30 emitted PM (69.4% versus 53.4%) and a reduction of the characteristic temperatures in the B30 case for two mass loss phases. As discussed in the Introduction, the origin of this higher soot reactivity is currently under investigation.…”

Section: Case Studymentioning

confidence: 79%

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Impact of biodiesel fuel on engine emissions and Aftertreatment System operation

et al. 2016

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Section: Introductionsupporting

confidence: 79%

Section: Case Studymentioning

confidence: 79%

Impact of biodiesel fuel on engine emissions and Aftertreatment System operation

et al. 2016

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“…It is obvious that there is a decrease 20 o C using B20 blend, leading to lower temperatures inside filter walls and on filter's surface during regeneration process. This observation, which is in accordance with other researchers [64,159], can be mainly explained by the higher reactivity of biodiesel soot.  Comparing B0-02 with B20-02, it is obvious that at the same regeneration duration higher filter backpressure decrease is achieved with lower filter wall temperatures, about 28 o C, using B20-50 ppm Cerium doped fuel due to the higher reactivity and the higher Cerium quantity in the accumulated B20 soot layer.…”

Section: End Of Regenerationsupporting

confidence: 93%

Experimental investigation of the steady state and transient operation of diesel engines fuelled by high percentage biodiesel blends

Tziourtzioumis¹,

Τζιουρτζιούμης²

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In Greece, biodiesel, in the form of Fatty Acid Methyl Esters (FAME), is produced since 2005 andcurrently mixed in the Diesel fuel at about 5.5% vol., this percentage being slowly but steadily increasing.The production capacity of existing biodiesel factories in Greece can supply the required quantities toincrease the biodiesel blending percentage up to 15%, provided that the necessary vegetable oil andrecycled oil quantities should become available and prices be favorable. According to Greek legislation, atleast 30% of the raw material must be domestically produced. This need is covered mainly by recycledcooking oils and only secondarily by energy crops in Northern Greece. The production of biodiesel fromlocal factories in Greece was regulated by means of distributing an annual quantity of biodiesel among thefactories, based on an algorithm that is modified every year. Automotive manufacturers allow running ofmodern diesel powered passenger cars on blends of biodiesel up to B20‐B30, provided that certainadditional maintenance measures are taken, including more frequent fuel and oil filter changes, along withinspection of engine oil level and the fuel lines and injection system components for possible leaks. In orderto ensure customer’s acceptance, standardization and quality assurance are key factors for the marketintroduction of biodiesel as transport fuel. This PhD thesis examines the effect of biodiesel fuel onperformance, efficiency, emissions and injection system durability of conventional and modern Dieselengines under steady state and transient operating conditions.These include a better understanding of the engine ECU operation with a high biodiesel (FAME) blend inmodern common‐rail injection Diesel engine, the study of the biodiesel combustion analyzing the capturedindicator graphs, the investigation of the filter regeneration behavior by means of the infraredthermography on a small filter module and in‐house computational tool and the study of biodieselatomization and injection characteristics by means of the Laser Doppler Velocimetry technique.In the first part of the Thesis, a better understanding of the engine ECU operation with a high biodiesel(FAME) blend in modern common‐rail injection Diesel engines is attempted. This understanding is appliedto the explanation of the observed effects on the engine performance and emissions characteristics withthis engine category. The results are compared to the relatively scarce works reported in the specializedliterature for the specific engine category and high blending ratios. Also, the effect of biodiesel blends inthe transient fuel system and engine operation is examined. Furthermore, the effect of prolonged engineoperation at a high biodiesel blend on the fuel system and the engine components is investigated.In the second part of the Thesis, the effect of low percentage biodiesel blends on the diesel filter loadingand regeneration behavior of a conventional, single cylinder Diesel engine with low pressure injectionsystem is presented. A fuel additive is employed in order to perform filter regeneration at relatively lowexhaust temperatures. The effect of the biodiesel on the filter regeneration is further investigated bymeans of infrared thermography on a small filter module and in‐house computational tool. In addition, theeffect of biodiesel on injection characteristics is investigated by means of Laser Doppler Velocimetrytechnique.Τhe results enhance our understanding of the engine ECU behavior with the high percentage biodieselblends. Certain modifications to engine ECU maps and control parameters are proposed and discussed,aimed at improvement of transient performance of modern engines run on high percentage biodieselblends. However, a high pressure pump failure that was observed after prolonged engine operation withthe B70 blend, hints to the use of more conservative biodiesel blending in fuel that should not exceed 30%for common rail engines.The observed benefits as regards the DPF extend also to the faster evolution of regeneration and thelower overall filter wall temperatures with favorable effects on the filter durability.

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“…In particular, studies have indicated that soy methyl ester (SME) biodiesel lowers the light-off temperature of passively regenerated CDPF systems [Boehman et al 2005;Williams et al 2006a,b;Sappok and Wong 2008;Fukuda et al 2008]. On the other hand, studies have also found that fuels with a high content of biodiesel can hinder regeneration in systems that use after-and post-injection of fuel [Fukuda et al 2008]. Additionally, some research has shown that there is the potential for increased ash emissions with certain types of biodiesel [Sappok and Wong 2008].…”

Section: Fuel and Lubricating Oil Properties And Qualitymentioning

confidence: 99%

Diesel aerosols and gases in underground mines: guide to exposure assessment and control.

Bugarski¹,

Cauda²,

Janisko³

et al. 2011

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Impact Study of High Biodiesel Blends on Performance of Exhaust Aftertreatment Systems

Cited by 11 publications

References 3 publications

Impact of biodiesel fuel on engine emissions and Aftertreatment System operation

Impact of biodiesel fuel on engine emissions and Aftertreatment System operation

Experimental investigation of the steady state and transient operation of diesel engines fuelled by high percentage biodiesel blends

Diesel aerosols and gases in underground mines: guide to exposure assessment and control.

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