Mobil

About: Mobil is a based out in . It is known for research contribution in the topics: Catalysis & Zeolite. The organization has 7085 authors who have published 10642 publications receiving 237497 citations. The organization is also known as: Socony-Vacuum Oil Company & Standard Oil Company of New York.

Ethylene polymerization kinetics with heterogeneous Ziegler‐Natta catalysts

Abstract: Ethylene polymerization kinetics was examined using a supported Ti-based catalyst activated by AlEt3. A computer-based technique for deconvoluting the GPC curves into constituent Flory components was developed. The kinetic analysis showed that the catalyst contains five populations of active centers. Each population has different formation and deactivation rates, produces polymers of different molecular weights and is differently affected by hydrogen.

Coplanar MMIC active bandpass filters using negative resistance circuits

Abstract: A second order active bandpass filter for a fixed centre frequency and a tunable one have been developed in a coplanar line technique using negative resistance circuits. These filters operate in the 1.8 GHz band and have a 3 dB bandwidth of 110 MHz. The tuning range of the centre frequency is 200 MHz. Each filter is fabricated on a GaAs substrate and occupies an area of 1.5/spl times/1.6 mm/sup 2/ on the wafer including all biasing elements. >

Removing SOx, NOX and CO from flue gases

Abstract: Removing sulfur oxide and carbon monoxide in a flue gas stream by combusting fuel in the combustor with a reduced amount of oxygen to partially convert carbon monoxide therein to carbon dioxide and sufficient to convert all sulfur-containing species in the flue gas stream to sulfur oxide and thus form a sulfur oxide enriched gas stream having between at least about 500 ppm carbon monoxide. The sulfur oxide enriched gas stream is contacted with a solid adsorbent bed for adsorbing the sulfur oxides in the form of inorganic sulfates and/or sulfur oxides. The solid adsorbent contains a catalytic oxidation promoter for oxidizing the carbon monoxide gas stream to carbon dioxide, thus forming a sulfur oxide and carbon monoxide depleted stream for disposal. The adsorbent bed is then contacted with a reducing gas stream for regenerating the adsorbent bed to form a hydrogen sulfide and/or sulfur dioxide bearing stream.

The Provenance of Triassic Continental Sandstones from the Beryl Field, Northern North Sea: Mineralogical, Geochemical, and Sedimentological Constraints

Abstract: A geochemical study of the heavy-mineral suite in Triassic strata from two wells in the Beryl Embayment was undertaken in order to identify changes in provenance through the Lewis Formation. Detailed provenance studies also allow the reconstruction of paleodrainage patterns and aid in predicting facies distributions. The heavy-mineral assemblage in the Lewis Formation is dominated by almandine-pyrope garnets, which are typically derived from pelitic metasediments, together with zircon, apatite, tourmaline, and rutile, some of which are rich in niobium (Nb). These latter phases could have been sourced either from metasediments or granitic protoliths, although Nb-rich rutiles have a more restricted paragenesis, being associated with alkaline plutonic rocks and granite pegmatites. In the uppermost members of the Lewis Formation influxes of more "exotic" provenance-specific heavy-minerals such as Cr-spinel, staurolite, and chloritoid become more common. The chemistry of the detrital Cr-spinel implies that it was derived from an ophiolitic source. Gross grain size, and facies changes in the Embayment suggest a NW to SE dispersal of detritus. Although hydraulic sorting of the heavy-mineral suite between relatively distal and proximal locations has resulted in subtle variations in whole-rock trace-element geochemical signatures, the complete overlap in the geochemical data from distal and proximal wells requires that the sediments were essentially derived from a single source area. The combination of mineralogical, sedimentological, and geochemical data implies that the dominant source for these sediments was the Devonian Old Red Sandstone (ORS), the Shetland ophiolite and the underlying Dalradian metasedimentary rocks of the Shetland Isles and the East Shetland Platform. Provenance studies such as this are central to the reconstruction of paleo-drainage patterns, which in turn lead to improved prediction of potential reservoir quality, distribution, and connectivity.