Experimental studies on combustion and emissions of RCCI (reactivity controlled compression ignition) with gasoline/n-heptane and ethanol/n-heptane as fuels

Qian, Yong; Wang, Xiaole; Zhu, Li; Lü, Xingcai

doi:10.1016/j.energy.2015.05.083

Cited by 105 publications

(31 citation statements)

References 40 publications

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“…Additionally the higher enthalpy of vaporization of ethanol reduced the gas temperature. Thus these factors leaded to longer ignition delay with premixed ethanol, and this was consistent with previous studies [13].At 0.53 MPa IMEP, the peak pressure and HRR first increased and then decreased with the increase of ethanol proportion. The increase of peak pressure is mainly due to the longer ignition delay which resulted in more well premixed mixtures before ignition.…”

Section: Resultssupporting

confidence: 80%

Experimental and numerical investigations on the combustion and emission characteristics of an ethanol/diesel dual-fuel engine

Dong¹,

Cheng²,

Ou³

2017

Proceedings of the 2016 4th International Conference on Renewable Energy and Environmental Technology (ICREET 2016)

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Abstract. Experiments and simulations were conducted to investigate the combustion and emission characteristics of ethanol/diesel dual-fuel combustion. The experiments were performed on a light-duty diesel engine with direct injection of diesel combined with port injection of ethanol. The results showed that the ethanol/diesel dual-fuel mode could reduce soot and NOx emissions simultaneously without EGR even at the higher load. However, the UHC and CO emissions of the ethanol/diesel dual-fuel mode increased gradually with the increase of ethanol proportion. Simulations showed that high UHC and CO emissions were formed in the crevice regions as well as cylinder center due to the lower reactivity of ethanol. It was also found that the cyclic variations of the ethanol/diesel dual-fuel mode increased gradually with the increase of premixed ratio at both loads. This was mainly due to the lower reactivity of ethanol.

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Section: Resultssupporting

confidence: 80%

Experimental and numerical investigations on the combustion and emission characteristics of an ethanol/diesel dual-fuel engine

Dong¹,

Cheng²,

Ou³

2017

Proceedings of the 2016 4th International Conference on Renewable Energy and Environmental Technology (ICREET 2016)

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“…It has been reported that high efficiency, along with NOx and soot reduction, can be obtained when using higher amount of low reactive fuel [13]. High reactive fuels are used either to trigger the combustion or initiate the LRF's combustion [56]. Many methods have been reported and tried in the RCCI concept that are discussed in the following section.…”

Section: Fuel Reactivity Controlmentioning

confidence: 99%

“…HRF/LRF ratio contributes more in controlling the ignition delay and thereby combustion. If that ratio increases, the ignition delay decreases and vice versa [14,56]. Table 5 shows the variation of heat release and NOx with respect to different fuel proportions (HRF/LRF).…”

Section: Gasoline/dieselmentioning

confidence: 99%

“…This is because the peak RoHR values for SOI 30° BTDC (250 J/CAD) took place for a longer duration when compared to peak RoHR values for SOI 18° BTDC (280 J/CAD). Ethanol and Gasoline/n-heptane An experimental test was reported for Gasoline/n-Heptane and ethanol/n-Heptane combinations for a direct injected single cylinder Diesel engine [56]. In this study, ethanol and gasoline were used as LRF and n-heptane as HRF.…”

Section: Gasoline/dieselmentioning

confidence: 99%

“…It has a port injector for low reactive fuel (LRF) and a direct injector for high reactive fuel (HRF) [14,51,56,[62][63][64][65][66]. Figure 5 shows the experimental setup for RCCI with port and direct injection (Dual fuel).…”

Section: Rcci With a Port And A Direct Injection (Dual Fuel)mentioning

confidence: 99%

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Current trends on combustion control methods using fuel reactivities

Sankaralingam¹,

Venugopal²

2022

Int. J. Automot. Mech. Eng.

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Compression ignition (CI) engines are used in heavy duty engine applications due to their high torque capability and thermal efficiency. However, high NOx and smoke emissions are the challenges in using CI engines. Homogeneous charge compression ignition (HCCI) is one of the best methods to reduce NOx and smoke emissions. However, controlling the combustion for an entire range of operation in HCCI mode is a challenging task. Different methods like fast thermal management (FTM), exhaust gas recirculation (EGR), turbo charging and reactivity controlled compression ignition (RCCI) are reviewed and discussed in this article. RCCI is similar to HCCI, which uses reactivities of two different fuels to control combustion. The combustion objectives of HCCI such as less NOx and soot emission can also be obtained through this method. Combustion control based on reactivities of various fuels (RCCI) is discussed significantly. Fuels that have different reactivities can help to control the combustion phasing and thereby reducing the emission. Two different fuels can be injected together into the manifold or one fuel can be injected in the port and other in the combustion chamber directly for reactivity based combustion control. The technological development in different combustion control methods is reviewed and discussed in this article which is a useful knowledge base for further research investigations. When compared to other combustion control methods, RCCI is found to be advantageous in all perspectives such as cost, flexibility in control, simplicity and wide range of operation.

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Photoautotrophic microorganisms from mangroves: a review of the ecological role and bioproducts of commercial interest

Borrego

Melo

Gracioso

et al. 2023

Biofuels Bioprod Bioref

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Photoautotrophic microorganisms, such as microalgae and cyanobacteria, are known to perform an essential role in ecological functions. Besides, they are considered cell factories, producing various bioproducts of commercial interest. In mangroves, these microorganisms are primarily responsible for the ecosystem's high productivity. Moreover, the unique natural characteristics of mangroves, coupled with the intense pressure from anthropic activities that these ecosystems typically experience, make mangrove photoautotrophic microbiota biotechnologically attractive. In this work, the ecological role and biotechnological potential of photoautotrophic mangrove microorganisms worldwide were evaluated, highlighting, their ecosystem services and bioproducts with environmental and commercial appeal, as well as their strategic and technological application through patent analysis.

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Experimental studies on combustion and emissions of RCCI (reactivity controlled compression ignition) with gasoline/n-heptane and ethanol/n-heptane as fuels

Cited by 105 publications

References 40 publications

Experimental and numerical investigations on the combustion and emission characteristics of an ethanol/diesel dual-fuel engine

Experimental and numerical investigations on the combustion and emission characteristics of an ethanol/diesel dual-fuel engine

Current trends on combustion control methods using fuel reactivities

Photoautotrophic microorganisms from mangroves: a review of the ecological role and bioproducts of commercial interest

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