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It has been widely reported that natural gas dual-fuel combustion (DFC) can achieve much lower soot emissions in contrast to conventional diesel combustion (CDC). Thus, using low-pressure direct injection (LPDI) systems could be an alternative for current high-pressure common rail injection systems, which would significantly reduce the system cost. The present study aimed at exploring the feasibility...
Choline hydroxide was used to accelerate the Al-water reaction to produce hydrogen efficiently and steadily, with only water and aluminum consumption. The effects of parameters such as initial aluminum mass, alkali concentration and temperature on the reaction rate and yield were studied. Compared with the average value 52.55 kJ/mol of other activation methods, the apparent activation energy of 45...
Only one H atom is extracted from a single H2O molecule in a usual reaction for hydrogen generation. In this study, a three-step reaction has been identified for completely extracting H2 from H2O molecule with the catalysis of a small Al6Cu cluster, based on the first principles calculations. All the reactants, products, and transition states are determined by optimization calculation and confirmed...
PODEn (polyoxymethylene dimethyl ethers) stand for the mixtures of ethers with the chemical formula CH3O(CH2O)nCH3, which have high cetane number and nearly 50% oxygen content. Gasoline/Diesel (GD) blends reduce the soot emissions of diesel engines with the penalty of combustion efficiency. In order to reduce emissions and improve thermal efficiency of diesel engines, blends of GDP (gasoline/diesel/PODEn)...
Mechanism of CWS (coal water slurry) electrolysis was investigated by using anode reaction kinetics. The results indicated that the activation energies of electrode reaction reduce with the increase in activity of carbon materials. According to the electrode reaction kinetics, the direct oxidation of CWS electrolysis occurred easily under lower concentration of electrolyte and higher concentration...
To meet the near future emissions legislations of SI (spark ignition) internal combustion engines, this paper presents an experimental study on the M-G DFSI (Methanol-Gasoline Dual-fuel Spark Ignition) combustion for reducing PN (particle number) emissions and improving fuel economy in a high compression ratio gasoline engine. M-G DFSI was operated using port-injection of a highly oxygenated, high...
PODEn (Polyoxymethylene dimethyl ethers) have high oxygen content, cetane number and good solubility in diesel fuel. In this work, pure diesel and PODE3-4/diesel blends with 10–20% PODE3-4 by volume were tested in a light-duty direct injection diesel engine without any modifications on the engine fuel supply system. Engine performance, combustion and emission characteristics were compared at various...
This paper presents an experimental study of the alcohols–gasoline and gasoline–alcohols dual-fuel spark ignition (DFSI) combustion for knock suppression and higher engine efficiency using a gasoline engine with high compression ratio. Alcohols–gasoline DFSI is organized using a port fuel injection (PFI) of high oxygenated, high latent heat of vaporization, and high octane alcohol fuel to suppress...
Pentanol is a new generation bio-fuel that could help relieve the energy crisis and environmental problems. The objective of this study is to reveal the combustion and emission characteristics of pentanol in a single-cylinder direct-injection diesel engine. In the present investigation, experimental data for pentanol in conventional diesel combustion mode were presented. The emissions, combustion...
This paper presents an experimental study on the M-G DFSI (methanol-gasoline dual-fuel spark ignition) combustion for knock suppression in a gasoline engine with high compression ratio. M-G DFSI is organized using a port-injection of high oxygenated, high latent heat and high octane number fuel to suppress knock and a direct injection of high energy density and high volatility fuel to extend high...
To explain the time dependence of cell voltage in CWS (coal water slurry) electrolysis, the effects of three coal types along with graphite, CWS concentration and catalysts on cell voltage are examined. Results show that the overall cell voltage for CWS electrolysis is lowered as coal rank decreases. The four overall types carbonaceous material show successive reductions in Uθ + η for CWS electrolysis...
Effects of CeO 2 and Fe 2 O 3 on anthracite combustion efficiency were investigated using differential thermal analysis (DTA). Based on heat release (Q D ) of anthracite as well as anthracite with CeO 2 and anthracite with Fe 2 O 3 additions against α-Al 2 O 3 in DTA experiment, effects of additives CeO 2 and Fe 2...
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