Effect of hydrogen peroxide addition to methane fueled homogeneous charge compression ignition engines through numerical simulations

Abstract

The effect of the direct injection of hydrogen peroxide into a port-injected methane fueled homogeneous charge compression ignition engine was investigated numerically. The injection of aqueous hydrogen peroxide was implemented as a means of combustion phasing control. A single cylinder homogeneous charge compression ignition engine (2.43 L Caterpillar) was modeled using the Cantera 2.0 flame code toolkit, the GRI-Mech 3.0 chemical reaction mechanism, and a single-zone slider-crank engine model. Start of injection timing and the amount of injected hydrogen peroxide were manipulated to achieve desired combustion phasing under a wide range of intake temperatures. As the concentration of hydrogen peroxide is increased, the combustion phasing is advanced up to 22 degrees for the conditions investigated in this study. This advancing effect is most pronounced at small concentrations (< 10 g H2O2 / kg CH4) and early injection timings (SOI < 25 degrees BTDC). The model suggests hydrogen peroxide can be introduced as a means of combustion phasing control while maintaining the low emissions and peak in-cylinder pressures inherent in homogeneous charge compression ignition engines.

1-hexene autoignition control by prior reaction with ozone

“…The modelling was implemented in the Cantera 2.2.0 software tools. As discussed by Hammond et al [15] homogeneous chemical kinetic reactor models are unable to capture the physical details of the engine such as temperature and reactant stratification, and will not predict heat release rates and emissions correctly, but they are reliable for predicting the ignition timing trends in the engine. The reaction conditions and cylinder pressure of the engine was calculated using a slider-crank model computed in the Python 3.4 programming language.…”

Implementing Natural Gas in a Compression Ignition Cycle Using Noble Gas Addition

“…The significantly large proven reserves of natural gas (200 trillion cubic meters worldwide) combined with the capability to operate a cleaner and more efficient cycle make it an attractive alternative fuel [5]. The use of natural gas as a standalone fuel, or as a blend with diesel or hydrogen, has been extensively studied in traditional spark ignition engines [6][7][8][9] and more advanced cycles such as homogeneous charge compression ignition (HCCI) [10][11][12][13][14] and reactivity controlled compression ignition (RCCI) [15][16][17][18].…”