Emulsification of waste cooking oil biodiesel blend with hydrogen peroxide to assess tailpipe emissions and performance of a compression ignition engine

Mohan, Sooraj and Dinesha, P (2022) Emulsification of waste cooking oil biodiesel blend with hydrogen peroxide to assess tailpipe emissions and performance of a compression ignition engine. Heat Transfer, 51 (4). pp. 3721-3735. ISSN 2688-4534

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Abstract

Hydrogen peroxide (H2O2) is an excellent oxidant carrier that finds its use in combustion and fuel applications. In the present study, H2O2 (30% assay) is used as an emulsifier in waste cooking oil biodiesel blend (B20) and the emissions and performance in a compression ignition engine are assessed. Along with the neat B20, three blends of B20 with 0.5%, 1%, and 1.5% H2O2 concentrations are used. Increasing the concentration of H2O2 beyond 1.5% resulted in vapor lock in the fuel pump leading to a loss in injection pressure. An increase in the exhaust gas temperature was recorded with the increase in H2O2 concentration due to improved fuel properties, like, cetane number, thermal conductivity, and microexplosions of fuel droplets. However, NOx emissions decreased mainly due to the presence of the hydroperoxyl group from H2O2. Analysis of variance was also carried out to assess the statistical significance of H2O2 on the responses and is seen that the maximum impact of H2O2 was positively influencing brake thermal efficiency (BTE), brake‐specific fuel consumption (BSFC), hydrocarbon (HC), and NOx. Compared with the B20 blend, H2O2 emulsified fuel with a concentra�tion of 1.5% showed a substantial reduction of 53.7%, 28.6%, 14.2%, and 16.2% in the average emissions of CO, HC, smoke, and NOx, respectively. Similarly, 7.9% and 7.1% improvement in the BTE and BSFC is obtained. However, more studies are required to ascertain the NOx reduction mechanism and address issues of fuel vaporization at higher concentrations of H2O2.

Item Type: Article
Uncontrolled Keywords: B20, biodiesel, CI engine, emission reduction, hydrogen peroxide, NOx
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 08 Aug 2022 07:07
Last Modified: 08 Aug 2022 07:07
URI: http://eprints.manipal.edu/id/eprint/159048

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