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Showing 1 to 20 of 307 for “"FCC"”.
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Vanadium interaction with FCC catalysts
Fluidised cracking catalysts, which contain a form of zeolite-Y as the main catalytically active component, are widply used commercially for the conversion of crude oil into more profitable product streams. During the cracking reaction, these catalysts are contaminated with vanadium which has a …
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Cyclic deformation of FCC crystals
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Zener Disaccommodation in Dilute Fcc Alloys
Made available in DSpace on 2014-12-10T17:57:48Z (GMT). No. of bitstreams: 1 6711816.pdf: 2120219 bytes, checksum: 0364cd610f18822315c456d7844f8967 (MD5) Previous issue date: 1967
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Valorización de corrientes de la unidad de FCC
… de naftas procedentes de la Unidad de FCC (Fluid Catalytic Cracking) de las refinerías, en un diésel que cumpla con los estándares de calidad y las especificaciones requeridas. El proceso global se desglosa en dos etapas, en primer lugar, la alquilación de compuestos aromáticos y …
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Thermal and Mechanical Stability of Nanograined FCC Metals
The results of these in situ transmission electron microscopy annealing and straining experiments provide clarification of some of the mechanisms operating during the microstructural evolution of nanograined face-centered cubic free-standing thin films under thermal and mechanical loading, while …
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Monte Carlo studies of the fcc Ising model
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-07T16:15:31Z No. of bitstreams: 1 1984_polgreen.pdf: 1524951 bytes, checksum: a91ada7a8f9fc84215c998e89a3ce6a9 (MD5)
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Mechanistic Investigation of FCC CO/NOx Emission Control Additives
<p>Fluid Catalytic Cracking (FCC) is the primary process used to convert crude oil into a variety of higher-value products in modern petroleum refineries. Some portion of the nitrogen present in crude oil feeds is transported - as part of the coke formed during the cracking process - into the FCC …
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Structural Evolution in the Dynamic Plasticity of FCC Metals
Above true strain rates of $10^4$ s$^{-1}$ FCC metals exhibit a rapid increase in strength. Understanding of the physical mechanisms behind this strength transition is hindered by the number and interdependence of candidate mechanisms. Broadly, contributions to strength can be split into …
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The microstructural evolution of fatigue cracks in FCC metals
… in a variety of planar and wavy slip FCC metals. The planar materials included Haynes 230, Nitronic 40, and 316 stainless steel, and the wavy materials included pure nickel and pure copper. Three different sets of experiments were performed to fully characterize the microstructural …
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Dislocation -Defect Interactions in Irradiated and Quenched FCC Metals
The experimental results are combined with atomistic simulations of the interaction of partial dislocations with defects in copper to form the basis for a new dispersed-barrier hardening crystal plasticity model that predicts the important features of the mechanical response of irradiated materials.
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A Computational and Experimental Examination of the FCC Incentive Auction
<p>In 2016, the Federal Communications Commission debuted a new auction mechanism, the Incentive Auction, with the intention of obtaining high frequency television broadcasting spectrum, repurposing it for cellular use, and reselling these licenses at profitable prices. In designing this process, …
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CONTINUUM DISLOCATION DYNAMICS MODELING OF THE DEFORMATION OF FCC SINGLE CRYSTALS
… of the deformation of Face Centred Cubic (FCC) single crystals. In this model, dislocations are described by a set of vector fields, one per slip system, whose evolution is governed by curl-type kinetic equations describing the transport of dislocation lines. These kinetic equations are …
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Energetics and Deformation Response of Random Grain Boundaries in FCC Nickel
… of deformation and intergranular fracture in FCC metals. Two types of samples were utilized: a sample with columnar grains consisting of pure <110> tilt boundaries and a thin-film sample with 3D grain orientations modeled after an experimental sample of austenitic steel. The structure and …
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Nanoscale modeling of materials: post deposition morphological evolution of fcc metal surfaces
… to post deposition morphological evolution of fcc metal surfaces. These studies were carried out by probing the energetics and the dynamics of underlying atomistic mechanisms responsible for surface diffusion. An important aspect is the determination of relative probability of competing …
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Surface Self-Diffusion on a Face-Centered Cubic (Fcc) Crystal: An Atomicview
Made available in DSpace on 2015-05-12T22:39:07Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7414513.PDF: 6532923 bytes, checksum: 585ce21f51d25613fc49299502b3c703 (MD5) Previous issue date: 1974
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Quasi-four-dimensional characterization of dislocation interactions in FCC and HCP systems
Dislocation/grain boundary and dislocation/dislocation interactions have been investigated in austenitic stainless steel and α-Ti systems using in situ deformation in a transmission electron microscope, diffraction contrast electron tomography for three-dimensional analysis, and electron …
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Modeling the deformation and failure behavior of FCC and HCP nanocrystalline materials
As foreseen by Richard Feynman in his famous talk titled There's Plenty of Room at the Bottom in 1959, scientists nowadays are miniaturizing structures in materials to achieve better performance as concerned in technical applications. Reducing grain sizes in polycrystalline materials into the range …
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Phonon spectra and thermal properties of some fcc metals using embedded-atom potentials /
By employing the embedded-atom potentials of Mei et ai.[l], we have calculated the dynamical matrices and phonon dispersion curves for six fee metals (Cu,Ag,Au,Ni,Pd and Pt). We have also investigated, within the quasiharmonic approximation, some other thermal properties of these metals which …
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Shear-induced homogeneous deformation twinning in FCC aluminum and copper via automistic simulation
… behavior for face-centered cubic (fcc) metals, aluminum and copper, is calculated using empirical potentials proposed by Mishin and by Ercolessi, based on the embedded atom method (EAM), and compared with published ab initio calculations. In copper close agreement is observed in the …
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Phonon dispersion curves and atomic mean square displacement for several fcc and bcc materials
… (PDC's) of a number of face-centred cubic (fcc) and body-centred cubic (bcc) materials have been calclllated from the quasiharmonic (QH) theory, the lowest order (A2 ) perturbation theory (PT) and a recently proposed Green's function (GF) method by Shukla and Hiibschle. The latter method …
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