Comparison of kinetic and equilibrium reaction models insimulating the behavior of porous media Metadata

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Title

  • Main Title Comparison of kinetic and equilibrium reaction models insimulating the behavior of porous media

Creator

  • Author: Kowalsky, Michael B.
    Creator Type: Personal
  • Author: Moridis, George J.
    Creator Type: Personal

Contributor

  • Sponsor: USDOE. Assistant Secretary for Fossil Energy.Gas
    Contributor Type: Organization

Publisher

  • Name: Lawrence Berkeley National Laboratory
    Place of Publication: Berkeley, California
    Additional Info: "Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States)"

Date

  • Creation: 2006-11-29

Language

  • English

Description

  • Content Description: In this study we compare the use of kinetic and equilibriumreaction models in the simulation of gas (methane) hydrate behavior inporous media. Our objective is to evaluate through numerical simulationthe importance of employing kinetic versus equilibrium reaction modelsfor predicting the response of hydrate-bearing systems to externalstimuli, such as changes in pressure and temperature. Specifically, we(1) analyze and compare the responses simulated using both reactionmodels for natural gas production from hydrates in various settings andfor the case of depressurization in a hydrate-bearing core duringextraction; and (2) examine the sensitivity to factors such as initialhydrate saturation, hydrate reaction surface area, and numericaldiscretization. We find that for large-scale systems undergoing thermalstimulation and depressurization, the calculated responses for bothreaction models are remarkably similar, though some differences areobserved at early times. However, for modeling short-term processes, suchas the rapid recovery of a hydrate-bearing core, kinetic limitations canbe important, and neglecting them may lead to significantunder-prediction of recoverable hydrate. Assuming validity of the mostaccurate kinetic reaction model that is currently available, the use ofthe equilibrium reaction model often appears to be justified andpreferred for simulating the behavior of gas hydrates, given that thecomputational demands for the kinetic reaction model far exceed those forthe equilibrium reaction model.

Subject

  • Keyword: Natural Gas
  • Keyword: Sensitivity
  • Keyword: Saturation
  • Keyword: Stimuli
  • STI Subject Categories: 54
  • Keyword: Hydrates
  • Keyword: Simulation
  • Keyword: Kinetics
  • Keyword: Methane
  • Keyword: Production
  • Keyword: Gas Hydrates
  • Keyword: Stimulation
  • Keyword: Depressurization
  • Keyword: Gas Hydrates Dissociation Kinetics Depressurization Thermalstimulation
  • Keyword: Surface Area Gas Hydrates Dissociation Kinetics Depressurization Thermalstimulation

Source

  • Journal Name: Energy Conversion and Management; Journal Volume: 48; Related Information: Journal Publication Date: 28 February2007

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Report No.: LBNL--63357
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 925540
  • Archival Resource Key: ark:/67531/metadc902720