Journal ArticleDOI
Kinetics for hydrocracking based on structural classes: Model development and application
GG Martens,Guy Marin +1 more
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TLDR
A kinetic model for hydrocracking of an industrial feedstock, fully incorporating the carbenium ion chemistry, was developed in this paper, where individual hydrocarbons in the reaction network were relumped into 8 lumps per carbon number: n-alkane, mono-, di- and tri-branched alkanes, mono, di-, tri-and tetraring cycloalkanes.Abstract:
A kinetic model for hydrocracking of an industrial feedstock, fully incorporating the carbenium ion chemistry, was developed. Individual hydrocarbons in the reaction network were relumped into 8 lumps per carbon number: n-alkane, mono-, di- and tri-branched alkanes, mono-, di-, tri- and tetraring cycloalkanes. The rate coefficient of a reaction in the relumped network resulted from the product of the rate coefficients of the elementary reaction steps with lumping coefficients. The former were obtained from regressions on gas-phase hydrocracking data of model components. Lumping coefficients were calculated based on the assignment of all (cyclo)alkanes and the corresponding carbenium ions to structural classes comprising species with identical thermodynamic properties. The simulation of an industrial reactor with vacuum gas-oil feed revealed the relative unimportance of transfer limitations for hydrocracking of saturated hydrocarbons and the model's ability to detail the influence of process conditions on the product composition.read more
Citations
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Nanoparticle technology for heavy oil in-situ upgrading and recovery enhancement: Opportunities and challenges
TL;DR: In this paper, the authors provide an overview of nanoparticle technology usage for enhancing the in-situ catalytic upgrading and recovery processes of crude oil and address some of the limitations and challenges facing this new technology.
Journal ArticleDOI
Kinetic modeling of hydrocracking of heavy oil fractions: A review
TL;DR: In this article, an exhaustive review of the scientific literature on kinetic modeling of heavy petroleum fraction hydrocracking is reported, including models based on the lumping technique, continuous mixtures, structure oriented lumping, and single event models.
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Modeling of Processes and Reactors for Upgrading of Heavy Petroleum
TL;DR: In this article, the authors present a model for step-growth polymerization based on process and reaction models and reactivity and copolymer composition. But they do not specify specific processes.
Journal ArticleDOI
A Review of Kinetic Modeling Methodologies for Complex Processes
TL;DR: In this paper, a review of kinetic modeling techniques for complex chemical processes is presented, in which the reactions are represented between molecules or even subdivided into elementary steps and the reaction networks are automatically generated, and a large number of rate equations with their rate parameters are derived.
Journal ArticleDOI
Kinetic modeling of pore mouth catalysis in the hydroconversion of n-octane on Pt-H-ZSM-22
C.S. Laxmi Narasimhan,Joris W. Thybaut,Guy Marin,Pierre Jacobs,Johan A. Martens,Joeri Denayer,Gino Baron +6 more
TL;DR: In this paper, a microkinetic model based on the single-event theory was developed to describe the hydroconversion of n-octane on Pt-H-ZSM-22 zeolite.
References
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Book
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TL;DR: In this article, the authors estimate physical properties of pure components and Mixtures and show that the properties of these components and mixtures are similar to those of ideal gases and liquids.
Journal ArticleDOI
A New Two-Constant Equation of State
Ding-Yu Peng,Donald B. Robinson +1 more
TL;DR: In this paper, the attractive pressure term of the semi-empirical van der Waals equation has been modified for predicting the vapor pressure and volumetric behavior of singie-component systems.
Journal ArticleDOI
Correlation of diffusion coefficients in dilute solutions
Charles R. Wilke,Pin Chang +1 more
TL;DR: In this paper, the relation of P to conveniently available properties of dilute solutions is generalized to permit estimation of diffusion coefficients for engineering purposes for convective transport due to volume changes on mixing is negligible and other possible modes of mass transfer are not operative.
Journal ArticleDOI
A generalized thermodynamic correlation based on three‐parameter corresponding states
Byung Ik Lee,Michael G. Kesler +1 more
TL;DR: In this paper, the volumetric and thermodynamic functions correlated by Pitzer and co-workers were analyzed with improved accuracy by a modified BWR equation of state, which provides a smooth transition between the original tables of Pitzer et al. and more recent extensions to lower temperatures.