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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

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Abstract

Cetane improver, Di-Tertiary Butyl Peroxide (DTBP), is used as a fuel additive to diesel–biodiesel blends to investigate the effect of exhaust gas recirculation (EGR) on diesel engines. Experiments were conducted on a single-cylinder, four-stroke and direct injection diesel engine with the said fuels using EGR to investigate the effect of fuel additive and EGR. The results reveal that the ignition of biodiesel blends is advanced by a few degrees crank angle (CA) and consequently peak pressure is preponed by 2–3° and also the combustion is finished earlier than that of diesel. With increase in the percentage of both biodiesel and DTBP, carbon monoxide (CO) and hydro carbon (HC) emissions were reduced considerably. CO emission reduction of 17–19 % and HC emission reduction of 23–25 % were observed with biodiesel with fuel additive when compared to that of diesel. With the combined effect of EGR and DTBP, NOx emissions were reduced by 33–35 % when compared to pure diesel without EGR. Smoke increase of 9 % was observed with EGR when compared to conventional diesel engine.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Gokaraju Rangaraju Insitute of Engineering and Technology, Hyderabad, Telangana, India

    K. Venkateswarlu

  2. Department of Mechanical Engineering, Q.I.S College of Engineering, Ongole, Andhra Pradesh, India

    B. S. R. Murthy

  3. Department of Mechanical Engineering, University College of Engineering, J.N.T.U Kakinada, Kakinada, Andhra Pradesh, India

    V. V. Subbarao

Authors
  1. K. Venkateswarlu
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  2. B. S. R. Murthy
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  3. V. V. Subbarao
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Correspondence to K. Venkateswarlu.

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Technical Editor: Luis Fernando Figueira da Silva.

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Venkateswarlu, K., Murthy, B.S.R. & Subbarao, V.V. An experimental investigation to study the effect of fuel additives and exhaust gas recirculation on combustion and emissions of diesel–biodiesel blends. J Braz. Soc. Mech. Sci. Eng. 38, 735–744 (2016). https://doi.org/10.1007/s40430-015-0376-7

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  • DOI: https://doi.org/10.1007/s40430-015-0376-7

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