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Mathematical simulation of a gas-solid reaction in a packed bed: reaction of CO2 with coke

Mathematical simulation of a gas-solid reaction in a packed bed: reaction of CO2 with coke

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Published by U.S. Dept. of the Interior in Washington .
Written in English

    Subjects:
  • Carbon dioxide,
  • Coke,
  • Chemical kinetics

  • Edition Notes

    11

    The Physical Object
    Pagination29 p.
    Number of Pages29
    ID Numbers
    Open LibraryOL22014622M

      The validated reaction mechanism was applied to a non-isothermal packed bed of iron ore particles as encountered in the stack of a blast furnace, and the predicted reduction degree was compared to measurements as depicted in Figure 4. Both experiments and predictions were carried out for a packed bed consisting of pellets and pellets/nut coke. Yu et al. studied the behavior of UPC using a thermal model of a coke-packed bed under similar operational conditions as those at Baosteel. The results showed that UPC participates in the gasification reaction of coke at °C, and the strength of the coke increases from % to %.

    Since the overall performance and productivity of the process depend on the treatment of gas-solid reactions, the proper reaction modeling is crucial in constructing an effective bed reactor model. The current study discusses the mathematical modeling procedure of bed type reactors that simplifies the bed structure and encompasses the particle. The shrinking core model or its variants are commonly used for gas-solid reactions (Omori, ; Levenspiel, ; Homma et al., ). However, since particle porosity or pore size distribution plays an important role in gas-solid reactions, the random pore model has also been employed (Bhatia and Perlmutter, , ; Kajitani et al., ).

    Coke Strength Simulation with Microstructure effect. April - March An Experimental Study of the Mechanism of Coke Strength Reduction by CO2 Reaction based on Microscopic Structures. Analysis of Gas-solid Heat Transfer in Packed Bed with Smelting. SUZUKI Kadutaka. The coke gasification reaction, i.e., the solution loss reaction, occurs substantially after all oxygen has depleted. It is necessary to consider this chemical reaction under high-temperature conditions. The overall reaction rate of the coke gasification reaction is shown in Equation (11) [21,24].


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Mathematical simulation of a gas-solid reaction in a packed bed: reaction of CO2 with coke Download PDF EPUB FB2

Get this from a library. Mathematical simulation of a gas-solid reaction in a packed bed: reaction of CO₂ with coke. [Hillary W St Clair; United States. Bureau of Mines.]. NIOSHTIC-2 Publications Search - - Mathematical Simulation of a Gas-solid Reaction in a Packed Bed: Reaction of Co2 With Coke.

This report describes an experimental method for determining parameters for the rate of reaction of co2 with solid carbon. Printed in Great Britain MODELLING OF NON-CATALYTIC GAS-SOLID REACTIONS-II.

TRANSIENT SIMULATION OF A PACKED BED REACTOR B. SAMPATH, P. RAMACHANDRAN and R. HUGHES University of Salford, Salford, Lanes, U.K. (Received 25 March ; accepted 16 July ) Abstract-A Transient model for packed bed non-catalytic reactors, which avoids many Cited by: Mathematical modelling of fluidized‐bed reactors for non‐catalytic gas–solid reactions Article in The Canadian Journal of Chemical Engineering 88(6) - December with Reads.

Applying finite volume technique to non-catalytic gas solid reactions has been discussed in detailed by the authors. 13, 17,27,28 The algorithm of model solution, containing all of the information.

Mechanism analysis and experimental verification of pore diffusion on coke and coal char gasification with CO2. Chemical Engineering Journal, Simulation of non-catalytic gas–solid reactions: application of grain model for the reduction of cobalt oxide with methane.

A numerical analysis of rate data for packed bed. Hassan Hassanzadeh, Jalal Abedi, Mehran Pooladi-Darvish, A comparative study of flux-limiting methods for numerical simulation of gas–solid reactions with Arrhenius type reaction kinetics, Computers & Chemical Engineering, /emeng, 33, 1, (), ().

Simulation of reactors with parallel-flow and counterflow configuration has been performed to study the methane steam re-forming reaction in a packed-bed inert membrane reactor (PBIMR). AbstractThe kinetics study, modeling, simulation and optimization of water gas shift reaction were performed in a catalytic fixed bed reactor.

The renowned empirical power law rate model was used as rate equation and fitted to experimental data to estimate the kinetics parameters using gPROMS. A good fit between predicted and experimental CO conversion data was obtained. Using a fluidized bed reactor (Fig. ) resolves some of the problems faced with a fixed bed particular reactor offers a much more enhanced mass and heat transfer and minimizes temperature gradients throughout the reactor [64].The mass and heat transfer are improved due to better mixing of the catalyst with the fluid, which provides a greater surface area for the reaction to occur.

The simulation results reveal that the micro packed reaction slit is close to isothermal, and a negligible temperature gradient is predicted also for a doubling of the critical reaction slit.

The water gas shift reaction (reaction 2) is a heterogeneous reaction (gas/solid). According to (Smith et al., ) in this kind of application, there are two options in the WGSR step.

The Field model [21] is used for coke reactions in the coke bed, including coke solution loss and coke combustion. The overall rate at the surface of a coke particle is determined by a combination of chemical reaction and diffusion of reacting gas, as shown in Table 2.

Mathematical Modeling and Simulation of Direct Reduction of Iron Ore in a Moving Bed Reactor by the Single Particle Model Vahab Ghalandari and Hassan Hashemipour Rafsanjani Chemistry & Chemical Technology,Vol Number 2, Page Carbon solution loss reaction of coke gasification is one of the most important reasons for coke deterioration and degradation in a blast furnace.

It also affects the permeability of gas and fluids, as well as stable working conditions. In this paper, a three dimensional model is established based on the operational parameters of blast furnace B in Bayi Steel.

The water gas shift reaction (reaction 2) is a heterogeneous reaction (gas/solid). According to (Smith et al., ) in this kind of application, there are two options in the WGSR step.

Using a high temperature shift (HTS) catalyst based reactor or a series of HTS. gas-solid reactors: fluidized bed reactors, fixed bed reactors, and moving bed reactors.

Existence of multiple phases opens up a variety of choices in bringing these phases together to react. Krishna and Sie [ 20 ] have discussed a three-level approach for reactor design and selection. A rigorous kinetic model was derived for the formation on a nickel catalyst of filamentous carbon by the Boudouard reaction and for the gasification of filamentous carbon by carbon dioxide, by hydrogen, and by steam.

The experimental study was performed in an electrobalance unit. Carbon formation and gasification experiments were performed at temperatures ranging from to K.

The particle interacts with gas flow field producing source terms Sd~ of mass, momen- tum, and enthalpy in Eq. (1) [16]. Combustion Model in the Coke Bed: Chemical reactions In the coke bed model, the following seven reac- tions are considered (VM means volatile matter): 1.

VM + a 02 ~ Products. CO + 1/2 02 --' CO2. H2 + 1/2 02 ~ H Reaction Rate Oscillations During the Carbon Monoxide Oxidation Reaction Over Pt/γ-Al 2 O 3 Catalysts: An IR-Transmission Spectroscopy Study A. ELHADERI T. TSOTSIS. Experimental Simulation of a Continuous Stirred Tank Reactor for Teaching Reactor Design and Control MICHAEL L.

BRISK Chapter 2, DOI: /bach Publication Date (Print):. A deep understanding of the particle conversion behavior is necessary for reactor-scale simulation and design, and the unqiue properties of supercriti.which is important in the design procedure for any fixed-bed catalytic reactor.

A bed of catalyst pellets is generally considered as if it were a continuous homogeneous media, and the physical properties of the packed bed or system are assigned values on the basis of a weighted average of each of the individual constituents making up the system.