Abstract
This article addresses the effect of combustible components (hydrogen and methane) of a producer gas fuel on in-cylinder combustion, performance, and emissions of a modified spark ignition engine. Owing to the fluctuating tendency of an onsite gasifier produced producer gas composition, a dynamic behavior in engine combustion and performance was expected. Thus, the present study was motivated to investigate the magnitude of the engine response variables against the known fluctuating producer gas composition trend. Experiments were conducted using bottled fueled producer gas on 359 cm3 engine capacity at a compression ratio of 11:1 and 1500 rpm. Further, the engine was operated under naturally aspirated mode and close to stoichiometry. The analysis based on acquired in-cylinder data revealed that, the fractions of hydrogen and methane have a profound effect on combustion duration and specific fuel consumption. Further, the producer gas blends, leading to reduction in fuel gas consumption were identified. On emission front, carbon-monoxide and nitric oxide pollutants were predominant but within prescribed central pollution control board norms of India, especially at full load engine condition and hydrogen enriched blend respectively.
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