The increasing emissions of carbon dioxide (CO2) and volatile hydrocarbons via burning fossil fuels result in a significant amount global warming air pollution. With the concern over impact fuel to environment, interest alternative production from CO2 generated through utilization new technologies has risen rapidly. Several clean fuels, including dimethyl ether (DME) have been investigated for ...

Homogeneous Charge Compression Ignition (HCCI) combustion is a pioneer method of combustion in which pre-mixed fuel and oxidizer (typically air) are compressed to the point of auto-ignition. HCCI engines can operate with most alternative fuels, especially, dimethyl ether (DME) which has been tested as a possible diesel fuel due to its simultaneously low NOx and PM emissions. In this paper a ...

This paper investigates hollow and porous alumina nanospheres that were previously synthesized to be used for the dehydration of methanol to dimethyl ether (DME). As hollow nanostructures possess characteristics such as low density and high surface to volume ratio, their catalytic activity between hollow and porous structure is compared. For this purpose, three most important parameters (acidit...

Nature's photosynthesis uses the sun's energy with chlorophyll in plants as a catalyst to recycle carbon dioxide and water into new plant life. Only given sufficient geological time can new fossil fuels be formed naturally. In contrast, chemical recycling of carbon dioxide from natural and industrial sources as well as varied human activities or even from the air itself to methanol or dimethyl ...

A series of catalysts based on hybrid intergrowth structure zeolites MFI-MEL, MFI-MTW, and MFI-MCM-41 are studied in the reaction olefins synthesis from dimethyl ether at atmospheric pressure a temperature 340 °C. The total acidity zeolite-based is shown to correlate with their activity. However, use zeolite MFI-MCM-41, which characterized by high content medium acid sites, additionally catalyz...

This study investigated the effects of high exhaust gas recirculation (EGR) rates on dimethyl ether (DME) fuel combustion performance, exhaust emissions and particle emission characteristics in a small direct injection diesel engine under various injection timings. To examine the effect of EGR and injection timings, the experiment was performed under high EGR rates (0%, 30%, 50%) and injection ...

Abstract We present a gas selection for Xe-based electron multiplier (GEM) detectors, Gas Multiplier Counters (GMCs) onboard the CubeSat X-ray observatory NinjaSat. To achieve an energy bandpass of 2–50 keV, we decided to use mixture at pressure 1.2 atm that is sensitive high-energy X-rays. In addition, effective gain over 300 required single GEM so 2 keV signal can be sufficiently larger than ...

Entering a new era of sustainable energy generation and consumption, micro-fuel cells are showing great potential for providing high density to consumer electronics, micro-reactor technology can indeed enable their integration by hydrogen on-demand from hydrocarbons. In this work, we present the design fully scalable wafer-level fabrication MEMS-based catalytic tested in real-life operating con...

Amending municipal solid waste incineration (MSWI) with carbon capture and utilisation (CCU) can simultaneously lower the climate change impacts of supply for a range uses. However, life cycle assessment (LCA) shows that technology choices benefits CCU applied to MSWI depend on energy system in which operates throughout its lifetime, markets products. Carbon reduces up 50% recovery MSWI. We ass...

Dehydration of methanol to produce dimethyl ether (DME) was studied at relatively high temperatures (400–600 °C) on biomass-derived phosphorus-containing carbon impregnated with a zirconium salt. Highly thermally stable phosphate surface groups could be obtained the final catalyst, which were responsible for stability and selectivity DME catalyst lower than 400 °C. However, harder operation con...