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access icon free Numerical simulation studies on performance, soot and NO x emissions of dual-fuel engine fuelled with hydrogen enriched biogas mixtures

  • Author(s): Bui Van Ga 1 ; Tran Van Nam 1 ; Bui Thi Minh Tu 2 ; Nguyen Quang Trung 1
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  • Source: Volume 12, Issue 10, 30 July 2018, p. 1111 – 1118
    DOI:  10.1049/iet-rpg.2017.0559 , Print ISSN 1752-1416, Online ISSN 1752-1424
© The Institution of Engineering and Technology
Received 18/08/2017, Accepted 08/04/2018, Revised 23/03/2018, Published 10/04/2018

This study analyses the effects of hydrogen concentration enriched biogas on indicated engine cycle work, soot and NO x emissions of dual-fuel engine. The results show that if advance injection angle of the engine is fixed at the same value as biogas only mode operation, peak value of in-cylinder pressure increases significantly but indicated engine cycle work is only slightly improved with an increase in hydrogen concentration. Optimum advance injection angle decreases as increasing hydrogen concentration in the fuel mixture. At a given engine speed, NO x emissions decrease with increasing equivalence ratio whereas soot emissions increase almost proportionally with the equivalence ratio. At a given equivalence ratio, NO x emission increases with the increasing hydrogen concentration in fuel mixture whereas soot emission decreases contrarily. The maximum soot peak value is obtained with slightly rich mixture at equivalence ratio of around 1.1. Lean burn mixture and high hydrogen concentration result in extremely low soot concentration. Soot emission is practically negligible at equivalence ratio of about 0.9 and 20% hydrogen concentration in mixture with biogas. As hydrogen concentration increases, the decrease of optimum advance injection angle reduces simultaneously both soot and NO x emissions.

Inspec keywords: biofuel; internal combustion engines; numerical analysis; soot; hydrogen economy; nitrogen compounds

Other keywords: equivalence ratio; NOx; hydrogen enriched biogas mixtures; dual-fuel engine; engine injection angle; indicated engine cycle work; soot concentration; of in-cylinder pressure; lean burn mixture; optimum advance injection angle; hydrogen concentration enriched biogas; fuel mixture; engine speed; numerical simulation; soot emissions

Subjects: Biofuel and biomass resources; Fuel processing industry; Numerical analysis; Hydrogen fuel; Biotechnology industry; Numerical approximation and analysis; Engines

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