Effect of the composition of syngas derived from biomass gasification on performance and emission characteristic of a diesel-syngas RCCI engine

Document Type : Original Article

Authors

1 Department of Mechanical Engineering, Faculty of Mechanical Engineering, University of Tabriz

2 Mechanical engineering faculty, Tabriz university

3 Mechanical Engineering, University of Bonab

Abstract

Syngas, mainly composed of hydrogen and carbon monoxide, is a suitable candidate for RCCI engines. In the present effort, the impact of syngases with different compositions, on the performance and emissions of a RCCI engine, at constant input energy, has been numerically investigated. For this purpose, different gasification processes have been employed to generate three different types of syngases for comparison with the simulated one which contains solely H2 and CO. Using these kinds of syngases compared with simulated one, results in less NOx in expense of more other emissions and less GIE. The ratio of hydrogen mass to the mass of other combustible species has a direct relation with maximum pressure and temperature, gross indicated efficiency (GIE) and NOx and a reverse relation with other pollutants. Syngas type I with a 78% reduction of NOx and a 11.7% reduction of GIE compared to conventional diesel and a 3.6% increase of exergy destruction compared to simulated syngas is the best alternative syngas in all cases.

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  • Receive Date: 11 May 2019
  • Revise Date: 11 July 2019
  • Accept Date: 19 July 2019

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