ExxonMobil

About: ExxonMobil is a company organization based out in Irving, Texas, United States. It is known for research contribution in the topics: Catalysis & Polymer. The organization has 16969 authors who have published 23758 publications receiving 535713 citations. The organization is also known as: Exxon Mobil Corporation & Exxon Mobil Corp..

Models for Reaction Dynamics in Glasses

Abstract: Glasses differ from crystals in that they lack long-range spatial order. Furthermore, due to their high viscosities, glasses are less favorable to the internal rearrangements displayed by liquids. Hence glasses show a multitude of microscopic patterns around each site (microenvironments), which may relax on widely different time scales. Any local probe of the glass structure, be it an elementary particle (neutron), a trapped charge carrier (electron or hole) or an impurity (ion or sensibilizing molecule) senses not only the different geometry of its surroundings, but, because of it, also changes in the local potentials. These may then reflect themselves in the rates of the processes under investigation. Thus geometrical disorder also implies energetic and temporal disorder. On the other hand, the long lifetime of the local microenvironments precludes an efficient internal averaging; in glasses one is forced to deal with the full complexity of a disordered medium.

Plastomer compatibilized polyethylene/polypropylene blends

Abstract: Compatibilized blends of polypropylene, linear low density polyethylene and a low molecular weight plastomer are disclosed. The blend preferably contains at least about 50 percent by weight of crystalline polypropylene, from about 10 to about 50 percent by weight of LLDPE dispersed in a matrix of the polypropylene, and a compatibilizing amount of an ethylene/alpha-olefin plastomer having a weight average molecular weight between about 5,000 to about 50,000, a density of less than about 0.90 g/cm3, and a melt index of at least about 50 dg/min. The blend is useful in the formation of melt spun and melt blown fibers. Also disclosed are spun bonded-melt blown-spun bonded fabrics made from the blends.

X-ray form factors and the electronic structure of graphite

Abstract: The bonding and spectroscopic properties of graphite are investigated by carrying out first-principles, self-consistent electronic structure calculations, and by comparing the results with high-resolution data from recent x-ray diffraction and angle-resolved photoemission measurements. The theoretical valence-charge density is in excellent agreement with values derived from experimental x-ray from factors. Unlike other group-IV covalent materials, the bonding charge exhibits a prominent double-humped structure due to the lack of $p$ core states. The energy band structure is also in good agreement with experimental measurements and previous calculations.

Method for utilizing gas reserves with low methane concentrations and high inert gas concentrations for fueling gas turbines

Abstract: The invention is directed to a method of fueling gas turbines from natural gas reserves with relatively low methane concentrations. The invention uses such reserves to generate electric power. The invention permits the use of these reserves at significantly lower cost than by producing pipeline natural gas to fuel gas turbines to generate electric power. These reserves currently generally are used only after the removal of impurities to produce pipeline natural gas quality turbine fuel. The latter current technology is capital intensive, and at current natural gas prices, economically unattractive. The process of the invention can remove the impurities from the gas from the natural gas reserve necessary for protection of the environment, and leaves inert gasses in the fuel in an amount which will increase the output of a gas turbine for the generation of power by about 5 to about 20%.