Effect of H2:CO ratio in syngas on the performance of a dual fuel diesel engine operation

Sahoo, Bibhuti Bhusan; Sahoo, Niranjan; Saha, Ujjwal K.

doi:10.1016/j.applthermaleng.2011.08.021

Cited by 147 publications

(55 citation statements)

References 15 publications

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“…The volumetric efficiency is further decreased when the syngas flow rate is increased. Similar results were obtained by Saha et al [22] when three different volumetric compositions of syngas were examined in diesel engines in dual-fuel mode. Under dual-fuel operation, Composition C showed the highest volumetric efficiency due to its lower density compared to other compositions.…”

Section: Resultssupporting

confidence: 76%

Performance Study of Imitated Syngas in a Dual-Fuel Compression Ignition Diesel Engine

Mahgoub¹,

Sulaiman²,

Karim³

2015

Int. J. Automot. Mech. Eng.

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Operating engines fueled by syngas and diesel is an available renewable option to avert concerns related to the supply of petroleum and the environment. But the use of syngas in a compression ignition (CI) diesel engine leads to a reduction in the power output because of its lower heating value compared with the 100% diesel mode. Furthermore, it is not easy to evaluate the performance of real syngas due to the varying gas content when inducted into a CI diesel engine. In this study, a single-cylinder, two-stroke, naturally aspirated CI diesel engine was operated with imitated syngas as the primary fuel in dual-fuel mode. The objective of this study is to investigate the effect of syngas composition on the performance of a dual-fuel engine running at different engine speeds (1200, 2000, 3000 rpm). The impact of engine speed on the performance of syngas in the dual-fuel CI diesel engine was examined at various diesel replacement ratios (DR%). Composition C showed the best results for engine performance compared to other compositions.

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Section: Resultssupporting

confidence: 76%

Performance Study of Imitated Syngas in a Dual-Fuel Compression Ignition Diesel Engine

Mahgoub¹,

Sulaiman²,

Karim³

2015

Int. J. Automot. Mech. Eng.

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“…(Bauer and Forest 2001a, b), H 2 -diesel (Shirk et al 2008), and syngas-diesel (Boehman and Le Corre 2008;Sahoo et al 2012). The use of NG or biogas in dual-fuel mode has also been investigated using spark SI (Cho and He 2007;Chandra et al 2011), CI (Duc and Wattanavichien 2007;Ryu 2013), and HCCI (Naber et al 1994) engines.…”

Section: Use Of Syngas and Biogas In Dual-fuel Diesel Enginesmentioning

confidence: 97%

“…Some research in this area has also focused on using syngas in natural gas-fired combustors (Colantoni et al 2010). The viability of using syngas and biogas in spark ignition (SI) and compression ignition (CI) engines has been a subject of numerous investigations (Boehman and Le Corre 2008;Sahoo et al 2012;Bika et al 2011;Korakianitis et al 2011). With regard to CI engines, much of the research has focused on dual-fuel operation, which is discussed in the next section.…”

Section: Syngas and Biogas Combustion In Practical Devicesmentioning

confidence: 98%

Using Petroleum and Biomass-Derived Fuels in Duel-fuel Diesel Engines

Xiao

2014

Novel Combustion Concepts for Sustainable Energy Development

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There is worldwide interest in developing renewable energy sources in a sustainable manner. Syngas and biogas offer significant potential in this context, as these fuels offer great flexibility with regard to their production and utilization. This chapter provides an overview of research dealing with the combustion and emission characteristics of these fuels, both as stand-alone fuels or by blending with petroleum fuels. Conversion methods for producing these fuels from different biomass sources are also briefly reviewed. While the syngas composition can vary widely, it generally has lower heating value, lower density, higher mass diffusivity, higher flame speeds, and wider flammability limits compared to hydrocarbon fuels. Moreover, its combustion leads to almost zero soot emission, although NO x emission may be a concern depending upon its composition and operating temperatures. Similarly, biogas has lower heating value compared to hydrocarbon fuels, and its ignition and combustion characteristics can vary noticeably depending upon its composition. While there have been few studies focusing directly on biogas combustion, there is extensive literature on methane combustion, including ignition, extinction, flammability limits, flame speeds, cellular instabilities, and emissions. Fundamental combustion aspects requiring further research include cellular instabilities, flame stabilization and blowout behavior, turbulent flames, and emission characteristics. Such efforts would lead to the development of optimized systems for producing these fuels and provide guidelines for optimizing their composition for a given set of operating conditions. The use of syngas and biogas in dual-fuel diesel engines has been a subject of numerous experimental and computational studies. A general observation is that the engine performance and emission characteristics are significantly modified by the presence of gaseous fuel. While the heat release in a diesel engine generally occurs through a hybrid combustion mode, involving rich premixed combustion and diffusion combustion, that in a dual-fuel engine also involves a lean combustion mode with a propagating flame. The dualfuel operation at high-load conditions can provide significant reduction in soot and CO soot emissions, while maintaining the engine efficiency, provided the injection characteristics including the amount of pilot fuel can be optimized. However, the NO x emission may increase, requiring a suitable strategy for lowering the temperatures. The dual-fuel strategy may be less effective at low load, resulting in lower thermal efficiency and higher UHC and CO emissions. Future work should be directed at optimizing the various parameters, such as injection timing, amount of pilot fuel injected, EGR, and multiple injections.

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“…Due to the poor performance of syngas' autoignition, a small amount of diesel is injected into the cylinder of the engine to ignite the syngas. Sahoo et al [6][7][8] studied the effect of the ratio of H 2 and CO in syngas on the combustion of a diesel engine. They found that the combustion efficiency of the diesel engine was improved with the increase of hydrogen content.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Performance and Emission of a Diesel‐Syngas Dual Fuel Engine

Feng

2017

Mathematical Problems in Engineering

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Based on the theory of direct relation graph (DRG) and the sensitivity analysis, a reduced mechanism for the diesel-syngas dual fuel was constructed. Three small thresholds were applied in the process of the detailed mechanism simplification by DRG, and a skeletal mechanism with 185 elements and the 832 elementary reactions was obtained. According to the framework of the skeletal mechanism, the time-consuming approach of sensitivity analysis was employed for further simplification, and the skeletal mechanism was further reduced to the size of 158 elements and 705 reactions. The Chemkin software with the detailed mechanism was utilized to calculate the effect of syngas addition on the combustion characteristics of diesel combustion. The findings showed that the addition of syngas could reduce the ignition delay time and increase the laminar flame speed. Based on the reduced mechanism and engine parameters, a 3D model of the engine was constructed with the Forte code. The 3D model was adopted to study the effect of syngas addition on the performance and exhaust emissions of the engine and the relevant data of the experiment was used in the calibration of the 3D model.

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Effect of H2:CO ratio in syngas on the performance of a dual fuel diesel engine operation

Cited by 147 publications

References 15 publications

Performance Study of Imitated Syngas in a Dual-Fuel Compression Ignition Diesel Engine

Performance Study of Imitated Syngas in a Dual-Fuel Compression Ignition Diesel Engine

Using Petroleum and Biomass-Derived Fuels in Duel-fuel Diesel Engines

Numerical Study of the Performance and Emission of a Diesel‐Syngas Dual Fuel Engine

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