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 sin...

The production processes included catalytic dehydration of methanol in an adiabatic fixed-bed reactor and two columns product separations. In this study, the technological process for dimethyl ether (DME) synthesis is built on PRO/II platform based on the combined parameters of the reaction dynamic model for methanol dehydration reaction, the improved NRTL model of the liquid phase, the PR mode...

Formaldehyde (HCHO), generating from hydrogen transfer (HT) of reactant, is significant for autocatalysis initiation and deactivation in methanol-to-olefins (MTO), but hitherto, its evolution throughout the reaction has not been thoroughly revealed. Herein, by established colorimetric analysis method, HCHO MTO dimethyl ether (DME)-to-olefins (DTO) reactions over SAPO-34 was situ quantitatively ...

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...

Abstract Sorption enhanced gasification (SEG) is a promising technology for producing gas derived from renewable feedstock to be used in biofuel synthesis processes. As response the growing need fuels, an SEG reactor design was developed industrial-scale dimethyl ether (DME) production. A 100 MW th scale concept wood pellets as created by model-based approach. Thus, 1D modeling tool coupled cir...

The effect of employing four different reactor models, Zeldovich–von Neumann–Döring (ZND), constant volume (CV), pressure (CP), and the Shock routine from Chemkin, to perform detonation-relevant chemical modeling was assessed. simulation results were compared in terms characteristic length scales analyses with representative mixtures: $$\hbox {H}_{2}{-}\hbox {O}_{2}{-}\hbox {N}_{2}$$ , {NO}_{2}...

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 ...

Heavy trucks contribute significantly to climate change, and in 2020 were responsible for 7% of total Swedish GHG emissions 5% global CO2 emissions. Here we study the full lifecycle cargo powered by different energy pathways, comparing their biomass feedstock use, primary net biogenic fossil emission cumulative radiative forcing. We analyse battery electric with bioelectricity from stand-alone ...