Mass transfer in sparged and stirred reactors: influence of carbon particles and electrolyte

Kluytmans, Jhj Jeroen; Wachem, van Bgm Berend; Kuster, Bfm Ben; Schouten, JC Jaap

doi:10.1016/j.ces.2003.05.004

Cited by 138 publications

(83 citation statements)

References 18 publications

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“…Using such a model and a particle-size analyzer capable of detecting particles with a diameter as small as 0.6 nm, they studied the kinetics of propane hydrate formation, and obtained a reaction rate constant in the order of 1 3 10 27 m/s. Nevertheless, due to some ambiguity regarding the actual value of the dissolution rate at the vapor-liquid water interface of a system containing particles, 17,18 Bergeron and Servio 19 introduced an alternate formulation of their model, with a driving force based on the difference between the mole fraction of the gas hydrate former in the bulk-liquid phase, and that under hydrate-liquid water equilibrium. They also reported mole fraction measurements of the gas hydrate former in the bulk-liquid phase during hydrate growth.…”

Section: Introductionmentioning

confidence: 99%

Reaction rate constant of CO₂ hydrate formation and verification of old premises pertaining to hydrate growth kinetics

Bergeron

Servio

2008

AIChE Journal

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in Wiley InterScience (www.interscience.wiley.com).Experimental data on the rate of carbon dioxide hydrate formation in a semibatch stirred-tank reactor was obtained using a particle-size analyzer capable of detecting particles as small as 0.6 nanometers in a closed-loop system. Experiments were carried out at temperatures between 275.3 and 279.4 K and pressures ranging from 2,014 to 3,047 kPa. The reaction rate constant of CO 2 hydrate formation was determined using a newly developed kinetic model independent of the dissolution rate at the vapor-liquid water interface. The average reaction rate constant determined experimentally was found to increase with temperature following an Arrhenius-type relationship, from 1.8 3 10 28 m/s to 1.8 3 10 27 m/s, over the 4-degree range investigated. Similarly, the reaction rate constant calculated from a population balance varied from 1.4 3 10 28 m/s to 1.7 3 10 27 m/s over the same temperature interval. The initial number of hydrate particles was calculated using the mole fraction of the gas hydrate former in the bulk-liquid phase at the onset of hydrate growth rather than the equilibrium solubility. The cumulative relative scattering was also compared to the derived count rate to determine whether or not the number of hydrate particles remained constant during the hydrate growth experiment.

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Section: Introductionmentioning

confidence: 99%

Reaction rate constant of CO₂ hydrate formation and verification of old premises pertaining to hydrate growth kinetics

Bergeron

Servio

2008

AIChE Journal

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“…For low concentration of solids, the increase of k L a values can be explained by the interaction of particles with gas bubbles. The particles present in the liquid cause an increase in the turbulence on the film surrounding the gas bubbles, promoting thus the bubbles surface renewal and breaking, or leading to a smaller effective diffusion layer (Galaction et al, 2004;Alper et al, 1980;Kluytmans et al, 2003). Solids in low concentration and of small particle size can, during their movement in the system, collide and interact with the gas-liquid interface and, in consequence, the gas bubbles break into smaller ones causing an increase in interfacial area (Kiełbus-Rapała & Karcz, 2009).…”

Section: The Results For Gas-solid-liquid Systemmentioning

confidence: 99%

Mass Transfer in Multiphase Mechanically Agitated Systems

Kiełbus-Rąpała¹,

Karcz²

2011

Mass Transfer in Multiphase Systems and Its Applications

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“…Degaleesan et al (1997) measured eddy diffusivities using computer aided radioactive particle tracking (CARPT) in air-water system for slurry bubble column reactor. Behkish et al (2002), Kluytmans et al (2003) and Vandu and Krishna (2003) measured mass transfer coefficients in slurry bubble column of three-phase flows including small particles. We have developed a mathematical model to describe the hydrodynamics of slurry bubble column reactors (Gamwo et al, 2003.…”

Section: 2mentioning

confidence: 99%

“…Mass transfer coefficients in slurry bubble columns of three-phase flows including fine particles were measured by Behkish et al (2002), Kluytmans et al (2003) and Vandu and Krishna (2003). The volumetric mass transfer coefficients are less than 1.0 sec -1 .…”

Section: Introductionmentioning

confidence: 99%

University/NETL Student Partnership Program

Holder¹

2003

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2 methane on the coal surfaces that may otherwise stay adsorbed in the coal matrix by decreasing the partial pressure of methane in the gas mixture. In addition, experimental work conducted on enhanced coalbed methane recovery by CO 2 injection [Reznik et al, 1984] shows that CO 2 is more adsorbing on coal than methane thereby giving it the potential to efficiently displace CBM and remain sequestered in the coal-seam. Thus coal-seams are considered to offer a very attractive option for CO 2 sequestration.In this work, focus is on the final part of the sequestration process -storage. The effects of various coal properties as well as operational scenarios on the injection and storage of CO 2 into a given coal-seam are analyzed. The analyses are based on results obtained from PSU-COALCOMP, a compositional coalbed methane numerical reservoir simulator capable of modeling the primary and enhanced recovery of coalbed methane.The operational design parameters considered in this study include the type, length and orientation of the injectors/producers while the coal-seam properties studied include coal porosity, coal permeability, cleat spacing, sorption capacity, and the initial conditions of the coal-seam -the reservoir pressure, adsorbed gas composition, amount of CO 2 initially adsorbed, water saturation and free-gas composition.Based on the data, results and analyses obtained, a CO 2 sequestration performance predictor tool is developed using artificial neural network (ANN) technology. The developed network will be able to predict the values of the performance indicators of the CO 2 sequestration process for a wide range of coal-seams and various production schemes. The developed ANN would also enhance our understanding of CO 2 sequestration process. 3 CHAPTER 2 LITERATURE REVIEW Carbon Dioxide SequestrationThe amount of carbon dioxide (CO 2 ) in the atmosphere has risen from preindustrial levels and most of this increase has been in recent years as shown in the data presented graphically in Figure 2-1. The corresponding increase in temperature as CO 2 levels increase raises environmental concerns such as global warming and its effects.This increase in CO 2 levels is attributed widely to the burning of fossil fuels, and if current trends in resource utilization continue, anthropogenic CO 2 emissions will increase rapidly during the 21 st century. Figure 2-2 shows the sharp increase in global CO 2 emissions over the last 100 years.The term "CO 2 sequestration" refers to the removal of CO 2 from either manmade emissions or the atmosphere and the safe, essentially permanent storage of this CO 2 .There are two main types of sequestration: direct sequestration, where CO 2 is removed from energy systems, and indirect sequestration, where CO 2 is removed from the ambient atmosphe re by enhanced natural processes. Sequestration is one of the three options for stabilizing CO 2 concentrations in the atmosphere and until the late 1990's, was not yet in the scientific lexicon. It is less familiar to the public at large than...

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Mass transfer in sparged and stirred reactors: influence of carbon particles and electrolyte

Cited by 138 publications

References 18 publications

Reaction rate constant of CO₂ hydrate formation and verification of old premises pertaining to hydrate growth kinetics

Reaction rate constant of CO₂ hydrate formation and verification of old premises pertaining to hydrate growth kinetics

Mass Transfer in Multiphase Mechanically Agitated Systems

University/NETL Student Partnership Program

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Mass transfer in sparged and stirred reactors: influence of carbon particles and electrolyte

Cited by 138 publications

References 18 publications

Reaction rate constant of CO2 hydrate formation and verification of old premises pertaining to hydrate growth kinetics

Reaction rate constant of CO2 hydrate formation and verification of old premises pertaining to hydrate growth kinetics

Mass Transfer in Multiphase Mechanically Agitated Systems

University/NETL Student Partnership Program

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Product

Resources

About

Reaction rate constant of CO₂ hydrate formation and verification of old premises pertaining to hydrate growth kinetics

Reaction rate constant of CO₂ hydrate formation and verification of old premises pertaining to hydrate growth kinetics