Title: Effects of n-butanol/calophyllum inophyllum biodiesel blend injection on the combustion characteristics of reactivity controlled compression ignition engine

Authors: M. Gowtham; R. Prakash

Addresses: School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu – 632014, India ' School of Mechanical Engineering, Vellore Institute of Technology, Vellore, Tamil Nadu – 632014, India

Abstract: The present experiment work implements the reactivity controlled compression ignition (RCCI) technique in analysing the combustion, performance, and emissions (regulated and unregulated) characteristics of diesel engine. A high reactivity calophyllum inophyllum biodiesel blend (B20) is directly injected inside the cylinder and a low reactivity n-butanol fuel is injected in three different ratios (10%, 20% and 30% by vol. basis) into the inlet manifold section using the electronic control unit. This study reveals that the brake thermal efficiency increased by 4.32%, oxides of nitrogen, smoke, acetaldehyde, benzaldehyde, hexanaldehyde, are reduced 19.31%, 8.82%, 12.19%, 11.71% and 37.02%, respectively compared to diesel at full load condition. The carbon monoxide, hydrocarbons, formaldehyde, crotanaldehyde are increased by 15.23%, 20.87%, 15%, and 13.23% compared with neat diesel fuel. The cylinder pressure and heat release rate are increased by 18%, 29.15% with n-butanol 30% injection due to the advanced start of combustion, high cylinder temperature, and better mixture formation. [Received: September 19, 2019; Accepted: June 26, 2020]

Keywords: calophyllum inophyllum methyl ester; n-butanol; diesel engine; ECU; combustion; performance; regulated emission; unregulated emission; RCCI combustion; biodiesel.

DOI: 10.1504/IJOGCT.2021.10038719

International Journal of Oil, Gas and Coal Technology, 2021 Vol.27 No.3, pp.338 - 361

Received: 19 Sep 2019
Accepted: 26 Jun 2020

Published online: 14 Jun 2021 *

Full-text access for editors Access for subscribers Purchase this article Comment on this article