An experimental investigation to study the effect of fuel additives and exhaust gas recirculation on combustion and emissions of diesel–biodiesel blends

Venkateswarlu, Kavati; Murthy, B. S.; Subbarao, V.V.V.S.

doi:10.1007/s40430-015-0376-7

Cited by 22 publications

(12 citation statements)

References 15 publications

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“…Various types of additives such as oxygenated additives (Ribeiro et al, 2007), antioxidants (Hajjari et al, 2014), cetane number improvers (Venkateswarlu, 2015), lubricity improvers (Anastopoulos et al, 2001) Nevertheless, since currently water washing is the most widely used process in industrial-scale biodiesel refineries; therefore, treating the huge amount of highly polluting washwater generated on a daily basis (3-10 L water/L biodiesel; COD, 35000 mg/L; BOD, 29000 mg/L) is of critical importance. Recently, Shirazi et al (2013c) applied commercial electrospun polystyrene membrane for treatment of biodiesel washwater and achieved promising reduction rates of 75%, 55%, 92%, 96%, and 30% for COD, BOD, TS, TDS, and TSS, respectively.…”

Section: Biodiesel Additivesmentioning

confidence: 99%

Recent trends in biodiesel production

et al. 2015

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HIGHLIGHTSThis article fully discusses the recent trends in the production of one the most attractive types of biofuels, i.e., biodiesel.with a focus on the existing obstacles for its large scale production. Moreover, recent innovations/improvements under three categories of upstream, mainstream, and downstream processes are also presented. Upstream strategies are mainly focused on seeking more sustainable oil feedstocks and/or enhancing the quality of waste-oriented ones. The mainstream strategies section highlights the numerous attempts made to enhance agitation efficiency including chemical and/or mechanical strategies. Finally, the innovative downstream strategies basically dealing with 1) separation of biodiesel and glycerin, 2) purification of biodiesel and glycerin, and 3) improving the characteristics of the produced fuel, are comprehensively reviewed.

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Section: Biodiesel Additivesmentioning

confidence: 99%

Recent trends in biodiesel production

et al. 2015

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“…According to the literature survey, researchers have used (2-ethylhexyl nitrate) (2-EHN), di-tert-butyl peroxide (DTBP), dimethoxyethane (DME), cyclohexyl nitrate and pyrogallol as cetane improver or cetane enhancer in general [17][18][19][20][21]. DTBP is one of the most commonly used cetane improvers for diesel engine fuels because it has properties such as good solubility, high cetane number and homogeny miscible [22]. Besides, it can be supplied easily.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of the cetane improver and bioethanol addition for the use of waste cooking oil biodiesel as an alternative fuel in diesel engines

Örs

2020

J Braz. Soc. Mech. Sci. Eng.

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In this study, bioethanol produced from sugar beet and biodiesel produced from waste cooking oils was blended with each other in the volumetric rates to be 20% and 80%, respectively. Cetane improver (di-tert-butyl peroxide) was added into blend fuel in 1-2-3% as volumetric. The obtained blends were used as a fuel in the diesel engine which is single-cylinder, directinject, four-stroke. The tests were conducted under four different engine loads (25%, 50%, 75% and 100%) and 1400 rpm engine speed. The test results showed that brake-specific fuel consumption was decreased up to 15.5% thanks to the addition of cetane improver, although biodiesel and bioethanol increased brake-specific fuel consumption by 16.1% and 27.54%, respectively. However, brake thermal efficiency values were increased up to 9.44% with both biodiesel and cetane improver added blend fuels, while brake thermal efficiency was decreased by 3.88% with bioethanol addition. The more compatible combustion characteristics with that of diesel fuel have been obtained due to especially the increase in cetane number. The use of biofuels increased both maximum cylinder pressure and heat release rate. While, with the cetane improver addition, a decrease in CO, HC and smoke opacity values was observed up to 22.5%, 17.44% and 24.44%, respectively, CO 2 , NO X and exhaust gas temperature values were increased up to 19.55%, 5% and 15.22%, respectively, according to bioethanol blend fuel. Keywords Waste cooking oil • Biodiesel • Bioethanol • Cetane improver • Diesel engine List of symbols BSFC Brake-specific fuel consumption BTE Brake thermal efficiency CA Crank angle CA50 Crank angle point for 50% accumulated HRR CA90 Crank angle point for 90% accumulated HRR CBD Cotton biodiesel cDF Conventional diesel fuel CI Cetane index CNI Cetane improver CO Carbon monoxide CO 2 Carbon dioxide DI Direct injection DTBP Di-tert-butyl peroxide

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“…NO X are generated in a diesel engine because of high flame temperature, peak pressure prevailing inside the cylinder, nitrogen content of the fuel and the residence time of the fuel inside the cylinder [56] . Biodiesel shows 25% reduction in NO x emissions compared to diesel fuel, which is essentially due to the reduction of temperature in the combustion chamber.…”

Section: Resultsmentioning

confidence: 99%

Production of biodiesel by enzymatic transesterification of waste sardine oil and evaluation of its engine performance

Arumugam

Venkatachalam

2017

Heliyon

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Waste sardine oil, a byproduct of fish industry, was employed as a low cost feedstock for biodiesel production. It has relatively high free fatty acid (FFA) content (32 mg KOH/g of oil). Lipase enzyme immobilized on activated carbon was used as the catalyst for the transesterification reaction. Process variables viz. reaction temperature, water content and oil to methanol molar ratio were optimized. Optimum methanol to oil molar ratio, water content and temperature were found to be 9:1, 10 v/v% and 30 °C respectively. Reusability of immobilized lipase was studied and it was found after 5 cycles of reuse there was about 13% drop in FAME yield. Engine performance of the produced biodiesel was studied in a Variable Compression Engine and the results confirm that waste sardine oil is a potential alternate and low-cost feedstock for biodiesel production.

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An experimental investigation to study the effect of fuel additives and exhaust gas recirculation on combustion and emissions of diesel–biodiesel blends

Cited by 22 publications

References 15 publications

Recent trends in biodiesel production

Recent trends in biodiesel production

Experimental investigation of the cetane improver and bioethanol addition for the use of waste cooking oil biodiesel as an alternative fuel in diesel engines

Production of biodiesel by enzymatic transesterification of waste sardine oil and evaluation of its engine performance

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