The oxidation of dimethyl ether (DME) was studied using a jet-stirred reactor over a wide range of conditions: temperatures from 500 to 1100 K; equivalence ratios of 0.25, 1, and 2; residence time of 2 s; pressure of 106.7 kPa (close to the atmospheric pressure); and an inlet fuel mole fraction of 0.02 (with high dilution in helium). Reaction products were quantified using two analysis methods:...

Cu-mordenite (Cu-MOR) catalysts with different copper loadings were prepared, characterized and examined in continuous, gas-flow synthesis of methyl acetate (MA) by dimethyl ether (DME) carbonylation. Improved activity selectivity observed for Cu-MOR up to 1 wt% Cu X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR) temperature-programmed reduction hydrogen (H2-TPR) us...

In the present study, an existing commercial light-duty automotive diesel engine is modified to a flexible dual-fuel (FDFE). The FDFE operates with different low and high reactivity dual fuel combinations under temperature combustion (LTC) mode using combined multipoint injection common rail direct systems. can smoothly transit between LTC conventional (CDC) mode. combines SI CI benefits stands...

The potential of dimethyl ether (DME) and dimethoxymethane (DMM), representatives the attractive oxymethylene (OME) alternative fuel family, are explored here as reactivity enhancers for methane-fueled polygeneration processes. Typically, such processes that can flexibly generate power, heat, or chemicals, operate under fuel-rich conditions in gas turbines internal combustion engines. To provid...

Pre-ignition, involving complex interactions of physical and chemical processes, occurs not only in actual combustion engines but also fundamental research equipment such as rapid compression machines shock tubes. Thus, identifying the conditions prone to pre-ignition is critical for interpretation ignition data fuel design. Shock tube experiments with dimethyl ether (DME) were carried out this...

Homogeneous charge compression ignition (HCCI) combustion enables higher thermal efficiency and lower NOx emission to be achieved in internal combustion engines compared to conventional combustion systems. A new concept HCCI engine system fueled with dimethyl ether (DME) with a high cetane number and methanol-reformed gas (MRG) with high anti-knock properties has been proposed by the author et ...

Due to the shortage of liquid hydrocarbon fuels for compression ignition engines, researchers have constantly been looking for alternative fuels. Recently, dim ethyl ether (DME) with its interesting properties, such as high cetane number and low exhaust emission has drawn a lot of interst as a suitable fuel for diesel engines. The main objective of this study was to assess the potentials and fe...

Substituting metals for either aluminum or phosphorus in crystalline, microporous aluminophosphates creates Brønsted acid sites, which are well known to catalyze several key reactions, including the methanol to hydrocarbons (MTH) reaction. In this work, we synthesized a series of metal-substituted aluminophosphates with AFI topology that differed primarily in their acid strength and that spanne...

A hierarchical zeolite CaA with microporous, mesoporous and macroporous structure was hydrothermally synthesized by a ”Bond-Blocking” method using organo-functionalized mesoporous silica (MS) as a silica source. The characterization by XRD, SEM/TEM and N2 adsorption/desorption techniques showed that the prepared material had well-crystalline zeolite Linde Type A (LTA) topological structure, mic...