0021-9517/$ see front matter 2011 Elsevier Inc. A doi:10.1016/j.jcat.2011.09.007 ⇑ Corresponding author at: Department of C Engineering, University of California at Berkeley, USA E-mail addresses: [email protected], igle Dimethyl ether (DME) homologation forms isobutane and triptane (2,2,3-trimethylbutane) with supraequilibrium selectivities within C4 and C7 hydrocarbons on both mesopo...

In this paper, slag-metal equilibrium experiments have been carried out for the determination of activity MgO in CaO–SiO2–MgO–Al2O3 melts blast furnace slag at T=1873 K using Sn as metal solvent and CaF2–MgO reference slag. Based on obtained experimental results, iso-activity contour system was plotted. The effects R(w(CaO)/w(SiO2)) w(MgO)/w(Al2O3) also discussed. R structure were analyzed by F...

In this study, effective and easily accessible cheap catalysts that assist converting heavy oil residue to lighter products with high yield are investigated. Hydrocracking experiments were carried out in a 10 ml stainless steel bomb-type reactor up down stirrer at 200 times of reciprocation per minute. The catalyst mixture provided the minimum coke was FeSO4.H2O, binary mixtures FeSO4.H2O metal...

Injecting charge carriers into the mobile bands of an inorganic oxide insulator (for example, SiO2, HfO2) is a highly complicated task, or even impossible without external energy sources such as photons. This is because oxide insulators exhibit very low electron affinity and high ionization energy levels. Here we show that a ZnO layer acting as a cathode buffer layer permits direct electron inj...

We present the results of large scale computer simulations in which we investigate the structural and dynamic properties of silicate melts with the compositions (Na2O)2(SiO2) and (Al2O3)2(SiO2). In order to treat such systems on a time scale of several nanoseconds and for system sizes of several thousand atoms it is necessary to use parallel supercomputers like the CRAY T3E. We show that the si...

Blast-furnace slag is one of the main by-products produced in process blast-furnace ironmaking. Its metallurgical properties have an important impact on smooth operation and long life blast furnaces. In this paper, activity MgO a CaO-SiO2-MgO-Al2O3 quaternary system was measured using reference-slag method at 1773–1873 K. The effects temperature coefficient Mg Sn were discussed. results showed ...

We present experimental results on single-event-induced breakdown in sub-5-nm plasma-enhanced SiO2, nitrided SiO2, Al2O3, HfO2, and Zr0 4Si1 6O4 dielectrics typical of current and future-generation commercial gate oxides. These advanced oxides are found to be quite resistant to ion-induced breakdown. Radiation-induced soft breakdown was observed in some films with 342 MeV Au (LET = 80 MeV/mg/cm...

The present study concentrates on optimization and the effect of machining parameters delamination that occurs during drilling operation pure glass fiber-reinforced polymer (GFRP) composites added GFRP which were developed for resistance to erosion wear. Contribution was investigated by using Taguchi method analysis variance (ANOVA). Relationship between modelled response surface methodology. C...

[1] The Hawaii Scientific Drilling Project recovered 3 km of basalt by coring into the flank of Mauna Kea volcano at Hilo, Hawaii. Rocks recovered from deeper than 1 km were deposited below sea level and contain considerable fresh glass. We report electron microprobe analyses of 531 glasses from the submarine section of the core, providing a high-resolution record of petrogenesis over ca. 200 K...