The effect of injection timing on the performance of natural gas with a high carbon dioxide (CO2) content in a Direct Injection (DI) gas engine

Ayandotun B. Wasiu, A. Rashid A. Aziz, Morgan R. Heikal

Research output: Contribution to conferencePaper

Abstract

This paper investigates the potential of utilizing raw natural gas from its reserves in Malaysia which are not harnessed because they are uneconomical due to the presence of large CO2 in it ranging from 25 to 89%. For this experimental work, the natural gas fields were simulated by adding CO 2 at 10%, 20%, 30%, and 40% to pure natural gas, and tested in a single-cylinder spark-ignition direct injection (DI) compressed natural gas (CNG) engine. Various injection timings were used, the injection duration was maintained, the ignition timing was adjusted to obtain the maximum brake torque (MBT), and at wide open throttle (WOT). The tests were carried out at a constant engine speed to study the effect of injection timings on performance and emission of the engine. Experimental results show that generally, the presence of high carbon dioxide content in the natural gas reduces the heating value of the mixture when compared with pure natural gas but however could be enhanced with injection timing in the range of 120 and 180 particularly for 20% CO 2 proportion in the mixture. There was a reduction in the NOX and CO emissions but an increase in the unburnt hydrocarbons (THC).

Original languageEnglish
DOIs
Publication statusPublished - 1 Jan 2014
Event4th International Conference on Production, Energy and Reliability, ICPER 2014 - Malaysia, 3-5 June 2014, Kuala Lumpur, Malaysia
Duration: 3 Jun 20145 Jun 2014

Conference

Conference4th International Conference on Production, Energy and Reliability, ICPER 2014
CountryMalaysia
CityKuala Lumpur
Period3/06/145/06/14

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    Wasiu, A. B., Aziz, A. R. A., & Heikal, M. R. (2014). The effect of injection timing on the performance of natural gas with a high carbon dioxide (CO2) content in a Direct Injection (DI) gas engine. Paper presented at 4th International Conference on Production, Energy and Reliability, ICPER 2014, Kuala Lumpur, Malaysia. https://doi.org/10.1051/matecconf/20141302027