Abstract
Experimental investigation has been carried out to utilize biogas as an alternative source of energy in compression ignition (CI) engine under dual fuel operational mode. Biogas was inducted into the inlet manifold at different flow rates along with fresh air through inlet manifold and diesel was injected as a pilot fuel to initiate combustion under dual fuel mode. The engine performance and emission characteristics of dual fuel operational mode were analyzed at different biogas flow rates and compared with baseline conventional diesel fuel. Based upon the improved performance and lower emission characteristics under the dual fuel operation, the optimum flow rate of biogas was observed to be 2.2 kg/h. The lower brake thermal efficiency (BTE) and higher brake-specific energy consumption (BSEC) were noticed with biogas-diesel fuel under dual fuel mode when compared with neat diesel operation. Test results showed reduced NO x emissions and smoke opacity level in the exhaust tailpipe emissions. However, higher hydrocarbon (HC) and carbon monoxide (CO) emissions were noticed under dual fuel mode at entire engine loads when compared with baseline fossil petro-diesel. Hence, the use of low-cost gaseous fuel such as biogas would be an economically viable proposition to address the current and future problems of energy scarcity and associated environmental concerns.
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Abbreviations
- NO x :
-
Oxides of nitrogen
- PM:
-
Particulate matter
- rpm:
-
Revolutions per minute
- CO2 :
-
Carbon dioxide
- CO:
-
Carbon monoxide
- O2 :
-
Oxygen
- HC:
-
Hydrocarbon
- BTDC:
-
Before top dead center
- CI:
-
Compression ignition
- BTE:
-
Brake thermal efficiency
- BSEC:
-
Brake-specific energy consumption
- HRT:
-
Hydraulic retention time
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Funding
The research work reported here is the part of DST-SERB sponsored fast track project entitled “Studies on combustion, performance and emission characteristics of diesel engine fuelled with Biodiesel and Biogas” (SB/FTP/ETA-306/2013). The financial support extended in the project is gratefully acknowledged.
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Responsible editor: Santiago V. Luis
Highlights
• Biogas is a potential alternative fuel for CI engine under dual fuel mode (DFM)
• Lower BTE and higher BSEC found with biogas under DFM
• Drastic reduction in NO x -smoke opacity with biogas under DFM
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Mahla, S.K., Singla, V., Sandhu, S.S. et al. Studies on biogas-fuelled compression ignition engine under dual fuel mode. Environ Sci Pollut Res 25, 9722–9729 (2018). https://doi.org/10.1007/s11356-018-1247-4
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DOI: https://doi.org/10.1007/s11356-018-1247-4