Reduced Reaction Mechanisms for Ethanol under Ultra-lean Conditions in Internal Combustion Engines

Marques, Carla S. T.; Silva, José R. M. da

doi:10.1021/acsomega.0c04170

Cited by 4 publications

(3 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The increasing energy share of hydrogen decreased the ethene emissions compared with E100 at all engine speeds, because of the higher in‐cylinder temperature with hydrogen leading to oxidation of pyrolytic products (ethene), thus indicating lower ethene formation 9 . The oxidation of ethene can be explained by Eqn (26): 10

C_{2} H_{4} goodbreak+ normalO \to {CH}_{2} HCO goodbreak+ normalH

where O is the free oxygen radical, CH 2 HCO is the acetyl radical and H is the free hydrogen radical.…”

Section: Resultsmentioning

confidence: 99%

“…Ethene is one of the intermediate products which are formed during ethanol oxidation 8 . Ethene forms as a product of thermal pyrolysis from ethanol as given in Eqn (1) 9,10

C_{2} H_{5} OH ()(, goodbreak+ normalM) \to C_{2} H_{4} goodbreak+ H_{2} normalO ()(, goodbreak+ normalM)

where M is the third body and H 2 O is water vapor.…”

Section: Introductionmentioning

confidence: 99%

“…Ethene is one of the intermediate products which are formed during ethanol oxidation. 8 Ethene forms as a product of thermal pyrolysis from ethanol as given in Eqn (1) 9,10 where M is the third body and H 2 O is water vapor. Acetaldehyde (C 2 H 4 O or MeCHO) is also one of the intermediates formed during ethanol oxidation.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Performance enhancement and emissions reduction of ethanol‐fueled spark ignition engine with hydrogen

Marwaha,

Subramanian

2023

Biofuels Bioprod Bioref

View full text Add to dashboard Cite

This study deals with the effect of hydrogen on the performance, combustion and regulated [carbon monoxide (CO), non‐methane hydrocarbons (NMHC), nitric oxide (NO), nitrogen dioxide (NO2)] and unregulated [nitrous oxide (N2O), ethanol, ethene, acetaldehyde, methanol] emissions of a spark ignition engine fueled with ethanol (E100). The engine was operated at a constant torque of 5.5 Nm and various speeds of 3500, 3800 and 4000 rpm, and both fuels (ethanol and hydrogen) were independently injected into the intake manifold of the engine during the suction stroke. The optimum hydrogen energy share at all speeds was 15% based on the combustion stability compared with base ethanol. The brake thermal efficiency with E100 at an engine speed of 4000 rpm increased from 14.4 to 15%, with a 15% hydrogen energy share (15% HES)‐E100. The emissions such as CO, NMHC, unburned ethanol, ethene and acetaldehyde decreased significantly with the optimum HES‐E100 compared with E100. However, the NO, NO2 and N2O emissions increased with hydrogen. Hydrogen addition to an ethanol‐fueled spark ignition engine could significantly reduce carbonaceous emissions along with improving energy efficiency.

show abstract

C_{2} H_{4} goodbreak+ normalO \to {CH}_{2} HCO goodbreak+ normalH

where O is the free oxygen radical, CH 2 HCO is the acetyl radical and H is the free hydrogen radical.…”

Section: Resultsmentioning

confidence: 99%

“…Ethene is one of the intermediate products which are formed during ethanol oxidation 8 . Ethene forms as a product of thermal pyrolysis from ethanol as given in Eqn (1) 9,10