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Slurry reactor design studies (Technical Report) | OSTI.GOV

2 days ago · The Chem Systems slurry process is a three phase reactor in which catalyst is suspended in a nonactive liquid, which mainly acts as a heat transfer medium. The reactor is similar to the slurry reactor for Fischer Tropsch processes described by Koelbel. It allows very good temperature control, and continuous catalyst addition and removal.

Mass transfer and hydrodynamics in catalytic slurry reactors

2 A model for enhanced mass transfer in slurry reactors by catalyst particles ad- . stirred slurry reactor (GIR), and a slurry bubble column reactor (SBC). Since the hydrody-namics of SBCs are complicated as illustrated by the enormous amount of research done,

Determination of mass transfer resistances of fast .

A methodology for the determination of mass transfer resistances of fast reactions in three‐phase mechanically agitated slurry reactors under the reaction conditions is presented. The mass transfer resistances affect significantly the overall mass transfer rate, the design equation and consequently the scale up of the reactor.

HYDRODYNAMIC AND MASS TRANSFER PARAMETERS IN .

2004-12-6 · HYDRODYNAMIC AND MASS TRANSFER PARAMETERS IN LARGE-SCALE SLURRY BUBBLE COLUMN REACTORS by Arsam Behkish B.S. in Chemical Engineering, University of Pittsburgh, 1997 Submitted to the Graduate Faculty of the School of Engineering in partial fulfillment of the requirements for the degree of Doctor of Philosophy University of Pittsburgh 2004

Experimental Study of Volumetric Mass Transfer .

2019-4-18 · mass transfer parameters in a rectangular slurry bubble column reactor simulating the Fischer-Tropsch synthesis under actual conditions using Iraqi paraffin oil via hydrodynamics effect and their influence on superficial gas velocity and volumetric mass transfer coefficient. Experimental work

Effect of catalyst loading on gasliquid mass transfer in a .

Arsam Behkish, Zhuowu Men, Juan R. Inga and Badie I. Morsi, Mass transfer characteristics in a large-scale slurry bubble column reactor with organic liquid mixtures, Chemical Engineering Science, 57, .

Bubble and Heat Transfer Phenomena in Viscous Slurry .

2014-10-14 · Heat transfer and bubble phenomena were investigated by adopting the drift flux model in a viscous slurry bubble column reactor (SBCR), having a diameter of 0.0508 m(ID) and height 1.5 m. The effects of superficial gas velocity (0.002 -0.164 m/s), solid concentration (0 - 20 wt%) and liquid viscosity (paraffin oil; 16.9 mPa•s and squalane; 25.9 mPa•s) on the gas holdup and heat transfer .

Slurry Reactors for Gas-to-Liquid Processes: A Review .

2019-5-26 · Heat Transfer in a Slurry Bubble Column Reactor: A Critical Overview. Industrial & Engineering Chemistry Research 2012, 51 (4), 1464-1473. DOI: 10.1021/ie201108b. Zhonghuo Deng, Tiefeng Wang, Nian Zhang, and Zhanwen Wang . Mass-Transfer Behaviors in Alcohol Solutions in an Internal-Loop Airlift Reactor of 5-m Height.

Design of slurry reactor for indirect liquefaction .

A slurry reactor is defined here as a three-phase bubble column reactor using a fine catalyst particle suspension in a high molecular weight liquid. The feed gas is introduced through spargers. It then bubbles through the column providing the agitation necessary for catalyst suspension and mass transfer.

MASS TRANSFER AND REACTION IN BUBBLE COLUMN SLURRY REACTOR .

2018-5-30 · Gas-liquid and liquid-solid mass transfer coefficients were obtained in a draft tube bubble column slurry reactor (abbreviated as DTBCSR) from the measurements of gas absorption and ion-exchange, respectively. Oxidation of sulfur dioxide on activated carbon was carried out in the same reactor. The effects of gas flowrates, diameters of draft tube and solid concentrations were investigated.

Experimental Study of the Effect of Catalyst Properties on .

of slurry bubble column i.e., gas hold-up, flow regimes and regime transitions and solid distribution. It is also the aim of the present study to investigate the effect of solid properties on mass transfer coefficient and removal of environmental gaseous pollutants in a slurry reactor. Theoretical Aspects Gas holdup

HYDRODYNAMIC AND MASS TRANSFER PARAMETERS IN .

Abstract. The design, modeling, optimization and scaleup of slurry bubble column reactors (SBCRs) require, among others, the knowledge of the kinetics, hydrodynamics, and mass as well as heat transfer characteristics in larger-scale reactors, operating under typical industrial conditions.

Mass transfer characteristics in a large-scale slurry .

2002-8-1 · The mass transfer coefficients (k L a) and bubbles size distribution were measured in a large-scale (0.316-m inside diameter, 2.8-m high) slurry bubble column reactor (SBCR) for H 2, CO, N 2 and CH 4 in two organic liquid mixtures (Isopar-M and a hexanes mixture) in the presence and absence of two solids (iron oxides catalyst and glass beads) in a wide range of pressure (0.17– 0.8 MPa .

Experimental Study of the Effect of Catalyst Properties on .

Theinfluence of silica and activated carbon particlesconcentration up to 20% v/v on regime transition, averagegas holdup, mass transfer coefficient, and CO2 removalwas studied in a semi- batch slurry bubble column reactor(SBC) with a porous gas sparger. The effects ofhydrophobicity and surfactant were also investigated.

UvA-DARE (Digital Academic Repository) Hydrodynamics .

hydrodynamics and gas-liquid mass transfer. (a) (b) large gas bubble small gas bubble gas bubble (known as Taylor bubble) liquid monolith channel wall Figure 0.1: Representation of gas-liquid flow patterns in the (a) bubble column and airlift reactors and (b) monolith reactor. SLURRY BUBBLE COLUMNS Investigations began with a look at [slurry .

Apple Academic Press

Slurry bubble column reactors are intensively used as a multiphase reactor in the chemical, biochemical, and petrochemical industries for carrying out reactions and mass transfer operations in which a gas, made up of one or several reactive components, comes into contact or reacts with a liquid.

Modelling-based Optimisation of the Direct .

2011-10-11 · Abstract: In the present study, we developed a multi-component one-dimensional mathematical model for simulation and optimisation of a commercial catalytic slurry reactor for the direct synthesis of dimethyl ether (DME) from syngas and CO 2, operating in a churn-turbulent regime., operating in a churn-turbulent regime.

Bubble and Heat Transfer Phenomena in Viscous Slurry .

Heat transfer and bubble phenomena were investigated by adopting the drift flux model in a viscous slurry bubble column reactor (SBCR), having a diameter of 0.0508 m(ID) and height 1.5 m. The effects of superficial gas velocity (0.002 -0.164 m/s), solid concentration (0 - 20 wt%) and liquid viscosity (paraffin oil; 16.9 mPa•s and squalane; 25.9 mPa•s) on the gas holdup and heat transfer .

Three phase slurry reactors - Chaudhari - 1980 - AIChE .

H. Hofmann, Reaction Engineering Problems in Slurry Reactors, Mass Transfer with Chemical Reaction in Multiphase Systems, 10.1007/978-94-015-6900-2, (844-870), (1983). Crossref Y. Serpemen, W.-D. Deckwer, Influence of Nonuniform Catalyst Distribution on the Performance of the Bubble Column Slurry Reactor, Mass Transfer with Chemical Reaction in .

Liquid−Solid Mass Transfer in Agitated Slurry Reactors and .

2019-12-12 · The liquid−solid mass transfer rate is studied for two three-phase reactor configurations, a stirred reactor and a rotating solid foam reactor, using the dissolution of copper by potassium dichromate as a model reaction. For the stirred reactor consisting of a Rushton stirrer and a slurry with small particles, the particle density has a large influence on the liquid−solid mass transfer .

Slurry Reactors, Fundamentals and Applications | SpringerLink

Abstract. Slurry reactors are applied nowadays in a wide range of chemical processes, both on a laboratory scale and in industrial practice. Applications range from catalytic hydrogenation of edible oils, coal hydrogenation, Fischer- Tropsch reactions to biological reactors (e.g. single cell proteins) and polymerization reactors.

Gas-liquid mass transfer of carbon dioxide .

Magnesium hydroxide (Mg(OH)2) has been considered as a potential solvent for C02 removal of coal-fired power plant and biomass gas. The chemistry action and mass to transfer mechanism of C02-H20-Mg(OH)2 system in a slurry bubble column reactor was described, and a reliable computational model was developed. The overall mass transfer coëfficiënt and surface area per unit volume were obtained .

(476ar) Hydrodynamic, Mass Transfer Parameters and .

2020-4-5 · Slurry bubble column reactors (SBCRs) and Ebulating bed reactors (EBRs) for Fischer-Tropsch synthesis were reported to have several advantages over fixed bed reactor technology. For instance, SBCR or EBR enjoys a much higher "online factor" when compared with the ARGE reactor, which operates in short cycles due to catalyst deactivation and the .

HYDRODYNAMIC AND MASS TRANSFER PARAMETERS IN .

Abstract. The design, modeling, optimization and scaleup of slurry bubble column reactors (SBCRs) require, among others, the knowledge of the kinetics, hydrodynamics, and mass as well as heat transfer characteristics in larger-scale reactors, operating under typical industrial conditions.

Effect of solid particles on the volumetric gas liquid .

Kluytmans et al. (2003) studied the effect of carbon particles and electrolytes on mass transfer in a 2D slurry bubble column and a stirred tank reactor. In the slurry bubble column, they found that k l a l and a l are independent of the carbon particle concentration for a nitrogen-water-carbon system.

Slurry Reactor - an overview | ScienceDirect Topics

Slurry reactors were developed to overcome the difficulties associated with the fixed-bed multitubular reactors. The first slurry reactor was commissioned by in 1993, with a diameter of 5 m and a height of 22 m (Figure 12-16) [48].In 1990, at Exxon, LA, a 1.2 m diameter, 21 m high slurry reactor with a production capacity of 200 bbl/day was developed [109].

Slurry reactors - LinkedIn SlideShare

Mass Transfer of Gas Through Liquid. 3. Dissolving bubble gas. 4. Mass transfer of dissolved gas through liquid film. 5. Reaction on the surface of the catalyst. 6. 1. Construction Reaction Tank Spargers Cooling Coils Probes Stirrer 7. 2. Types of Slurry Reactors • Bubble Column Reactor • Fischer Tropsch Reactor • Slurry Batch Reactor 8 .

Hydrodynamics, Mixing, and Mass Transfer in Bubble .

2019-7-2 · Mean bubble size, cm d t Tube diameter, cm Gravitational acceleration, cm2/s H Henry's constant, - H D Dynamic liquid height, cm H S Static liquid height, cm k Radial exchange term, cm2/s k L Gas-Liquid side mass transfer coefficient, cm/s k L a Overall volumetric mass transfer coefficient, s-1 K T Empirical constant L Dynamic liquid height, cm

Large Bubble Sizes and Rise Velocities in a Bubble Column .

The results are reported of an experimental study of the gas holdup, ϵ G, large bubble diameter, d Lb, and large bubble rise velocity, V Lb, in a 0.1 m wide, 0.02 m deep and 0.95 m high rectangular slurry bubble column operated at ambient temperature and pressure conditions.The superficial gas velocity U was varied in the range of 0–0.2 m/s, spanning both the homogeneous and heterogeneous .

(476ar) Hydrodynamic, Mass Transfer Parameters and .

2020-4-5 · Slurry bubble column reactors (SBCRs) and Ebulating bed reactors (EBRs) for Fischer-Tropsch synthesis were reported to have several advantages over fixed bed reactor technology. For instance, SBCR or EBR enjoys a much higher "online factor" when compared with the ARGE reactor, which operates in short cycles due to catalyst deactivation and the .