Effect of hydrogen and oxygen addition as a mixture on emissions and performance characteristics of a gasoline engine

Y. Karagöz*, N. Yuca, T. Sandalci, A. S. Dalkiliç

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

Use of hydrogen in spark ignition engines as supplementary fuel can be preferred due to improved combustion characteristics and emission advantages. However, hydrogen storage and production difficulties under the hood limit the use of it in internal combustion engines (ICEs). In this study, a different approach was used to overcome these difficulties. Hydrogen and oxygen gas mixture was produced by electrolyser and consumed simultaneously to eliminate the necessity of a storage device. Firstly, a practical alkaline water electrolyser was designed and manufactured to produce hydrogen from water to be subsequently used in ICE as a supplementary fuel. In order to optimize electrolyser, the parameters of gap between plates, concentration of solution and voltage were kept under control. Then, H2/O2 gas mixture used as secondary fuel in SI engine was generated by electrolyser on optimized operating conditions. 0 and 20 l/min H2/O2 mixture as supplementary fuel was introduced into intake manifold of engine using gas injectors where 0 l/min refers to without hydrogen case and 20 l/min with hydrogen case. According to the results, the brake power and brake thermal efficiency were increased by means of hydrogen addition. Besides, total hydrocarbon and carbon monoxide emissions decreased, whereas the dramatic increase of nitrogen oxides emissions couldn't be prevented during the experimental work.

Original languageEnglish
Pages (from-to)8750-8760
Number of pages11
JournalInternational Journal of Hydrogen Energy
Volume40
Issue number28
DOIs
Publication statusPublished - 27 Jul 2015

Bibliographical note

Publisher Copyright:
Copyright © 2015 Hydrogen Energy Publications, LLC. All rights reserved.

Funding

This research was supported by the Yildiz Technical University Scientific Research Projects Coordination Department. Project Number: 2011-06-01-YULAP01. Also, the authors are indebted to Tek Oto Company (Peugeot dealer in Istanbul, Turkey) for SI engine donation.

FundersFunder number
Yildiz Technical University Scientific Research Projects Coordination Department

    Keywords

    • Additional fuel
    • Combustion
    • Electrolysis
    • Emission
    • SI engine

    Fingerprint

    Dive into the research topics of 'Effect of hydrogen and oxygen addition as a mixture on emissions and performance characteristics of a gasoline engine'. Together they form a unique fingerprint.

    Cite this