Title: Experimental investigation on reduction of NO_x emission of compression ignition engine fuelled with bio-diesel and diethyl ether

Authors: Paresh D. Patel; Sajan Chourasia; Niraj K. Shah; Absar M. Lakdawala; Rajesh N. Patel

Addresses: Department of Mechanical Engineering, Institute of Technology, Nirma University, Ahmedabad – 382481, India ' Department of Mechanical Engineering, Institute of Technology, Nirma University, Ahmedabad – 382481, India ' Department of Mechanical Engineering, Institute of Technology, Nirma University, Ahmedabad – 382481, India ' Department of Mechanical Engineering, Institute of Technology, Nirma University, Ahmedabad – 382481, India ' Department of Mechanical Engineering, Institute of Technology, Nirma University, Ahmedabad – 382481, India

Abstract: The present work emphasis on the reduction of diesel engine emission using Jatropha-based bio-diesel and diethyl ether (DEE). The experiments show that with 20% (B20) addition of bio-diesel, the BSFC and BSEC increase by 7% and 10% while efficiency and emissions - CO, CO₂, NO_x, and HC - decreases by 1%, 64%, 5%, 18% and 48% respectively. However, it also shows that, even optimised blend (B20) is not able to meet stringent emission norms - particularly for NO_x - set by EURO IV. For the further reduction of the NO_x, DEE is added from 0% to 5% in B20. The results show that addition of 4% DEE, does not significantly influenced the engine performance, however reduction in NO_x found to be 40% compared with diesel fuel. A hypothesis is proposed that, "The reduction in engine emission is due to improvement in combustion in presence of DEE". The hypothesis is validated through combustion analysis showing increase in peak pressure (P_max) by 7% and reduction in delay period by 1.5 degree with addition of 4% DEE in B20.

Keywords: bio-diesel; diethyl ether; DEE: diesel engine; NO_x emission; combustion characteristic.

DOI: 10.1504/IJGW.2017.083669

International Journal of Global Warming, 2017 Vol.11 No.4, pp.431 - 448

Received: 12 Nov 2014
Accepted: 12 Apr 2015
Published online: 19 Apr 2017 *

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