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.

Process for removing mercury vapor and chemisorbent composition therefor

Abstract: A process and composition for removing elemental mercury vapor from a gas such as natural gas is disclosed. The mercury-containing gas is contacted with a solid support such as carbon containing elemental sulfur and at least one metal which catalyzes the reaction: 2 Hg+S 2 2 HgS.

Normal fatty acids in sediments

Abstract: Normal fatty acids have been found by several investigators in a number of sediments ranging in age from Precambrian to Recent. This paper summarizes these occurrences. A variety of molec-ular distributions have been observed. In most sediments, even-carbon-numbered normal fatty acids are much more abundant than those with odd carbon numbers ; in some sediments, however, concentrations of even- and odd-carbon-numbered normal fatty acids are about equal. Normal fatty acids have been postulated as pos-sible precursors for normal paraffin hydrocarbons in petroleum because of 1) structural similarities between the two kinds of molecules, 2) ubiquity of fatty acids in biological materials, 3) fatty acid-normal paraffin relationships in sediments, and 4) distribution of normal paraffins in some crude oils. Evidence suggests that normal fatty acids may be precursors for many normal paraffins of intermediate and high molecular weights found in petroleum. Detailed mechanisms of chemical reactions by which normal paraffins can be de-rived from fatty acids in sediments under geo-logically reasonable conditions have yet to be defined.

Hydrogen diffusion in crystalline semiconductors

Abstract: The diffusion of hydrogen in semiconductors is complicated by the existence of several charge states (notably H+ in p-type material and H- or H0 in n-type material, at least for Si) and also that hydrogen is present in a number of different forms, namely atomic, molecular or bound to a defect or impurity. Since the probability of formation of these different states is dependent on the defect or impurity type and concentration in the material and on the hydrogen concentration itself, then the apparent hydrogen diffusivity is a function of the sample conductivity and type and of the method of hydrogen insertion. Under conditions of low H+ concentration in p-type Si, for example, the diffusivity is of the order of 10-10 cm2 · s-1 at 300 K and is consistent with the value expected from an extrapolation of the Van Wieringen and Warmoltz expression DH = 9.4 × 10-3exp[-0.48 eV/kT] cm2 · s-1. The characteristics of hydrogen diffusion in n- and p-type Si and GaAs are reviewed in this paper, and the retardation of hydrogen permeation by molecular formation and impurity trapping is discussed. The measurement of several key parameters, including the energy levels for the hydrogen donor and acceptor in Si and the diffusivity of the H0 and H- species, would allow a more quantitative treatment of hydrogen diffusion in semiconductors.

Hydraulic fracturing with a refractory proppant combined with salinity control

Abstract: A process for controlling fines or sand in an unconsolidated or loosely consolidated formation or reservoir containing hydrocarbonaceous fluids where the reservoir is penetrated by at least one wellbore. The method includes the utilization of hydraulic fracturing and a fused refractory proppant in combination with control of the critical salinity rate and the critical flow velocity. The proppant increases thermal conductivity during a steam-flooding process while controlling fines or sand.