A distributed pore size and length model for porous media reacting with diminishing porosity

Abstract A mathematical model for describing transport, reaction, and pore structure evolution during gas—solid reactions with solid product is modified and extended for application to porous media whose structure can be represented by a network of pores of distributed size and length. Model equations are presented for both densification and gas—solid reactions with solid product. The effects of nonuniform pore length on the model predictions are examined by using the model to describe the sulfation of porous CaO and calcined limestones. We also investigate the dependence of the model predictions on the formula used to estimate and follow the evolution with the conversion of the effective diffusivity of the gaseous reactant in the pore space.

• Publication year

  1993

• Venue

  Chemical Engineering Science

• Publication date

  Unknown publication date

• Fields of study

  Materials Science, Chemistry, Engineering

• Identifiers
  DOI 10.1016/0009-2509(93)80054-T
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

• An Effective Medium Approach for Modeling Chemical Vapor Infiltration of Porous Ceramic Materials

  1990cited by this paper
• Experimental evaluation of a class of distributed pore size models for gas-solid reactions with solid product

  1990cited by this paper
• Statistical and continuum models of fluid-solid reactions in porous media

  1990cited by this paper
• Pore structure and particle size effects on limestone capacity for SO2 removal

  1989cited by this paper
• Diffusion in pore networks: Effective medium theory and smooth field approximation

  1987cited by this paper
• A generalized pore model for gas‐solid reactions exhibiting pore closure

  1987cited by this paper
• Percolation concepts in modelling of gas-solid reactions-III. Application to sulphation of calcined limestone

  1987cited by this paper
• Small pore closure and the deactivation of the limestone sulfation reaction

  1986cited by this paper
• A percolation model of catalyst deactivation by site coverage and pore blockage

  1985cited by this paper
• Estimation of effective transport coefficients in porous solids based on percolation concepts

  1985cited by this paper
• Mathematical modelling of gas-solid reactions with solid product

  1985cited by this paper
• Application of percolation theory to noncatalytic gas‐solid reactions

  1984cited by this paper
• The effect of pore structure on fluid‐solid reactions: Application to the SO2‐lime reaction

  1981cited by this paper
• A Random Capillary Model with Application to Char Gasification at Chemically Controlled Rates

  1980cited by this paper
• Conductivity and spin-wave stiffness in disordered systems-an exactly soluble model

  1974cited by this paper
• Practical Models for Isothermal Diffusion and Flow of Gases in Porous Solids

  1973cited by this paper
• Percolation and Conduction

  1973cited by this paper
• Numerical initial value problem~ in ordinary differential eqttations

  1971cited by this paper
• Percolation processes

  1957cited by this paper

• A robust theoretical approach to analyze the diffusion of natural and synthetic wound antimicrobials through polyethylene glycol hydrogel using obstruction theory

  2023cites this paper
• Modeling of Limestone Sulfation for Typical Oxy-Fuel Fluidized Bed Combustion Conditions

  2013cites this paper
• NOx and SO2 emissions from municipal solid waste (MSW) combustion in CO2/O2 atmosphere

  2012cites this paper
• NOx and SO 2 emissions from municipal solid waste ( MSW ) combustion in CO 2 / O 2 atmosphere

  2012cites this paper
• An Adaptive Random Pore Model for Multimodal Pore Structure Evolution with Application to Char Gasification

  2011cites this paper
• Experimental investigation on calcination/sulphation characteristics of limestone modified by acetic acid solution in O2/CO2 atmosphere

  2011cites this paper
• Simulation on Pore Size Distribution of Calcined Product from Calcium-Based Sorbents

  2010cites this paper
• Using Sohn's law of additive reaction times for modeling a multiparticle reactor. The case of the moving bed furnace converting uranium trioxide into tetrafluoride

  2006cites this paper
• Integrating Gas Sorption with Mercury Porosimetry

  2005cites this paper
• Contribution à la modélisation des réactions et des réacteurs gaz-solide

  2005cites this paper
• Multiscale hybrid modeling of film deposition within porous substrates

  2004cites this paper
• Simultaneous determination of the pore-length distribution and pore connectivity for porous catalyst supports using integrated nitrogen sorption and mercury porosimetry

  2004cites this paper
• Robust numerical simulation of porosity evolution in chemical vapor infiltration III: three space dimension

  2003cites this paper
• Level set model of microstructure evolution in the chemical vapor infiltration process

  2002influential citation
• Physicochemical and thermal modelling of the reaction between a porous pellet and a gas

  2002cites this paper
• Robust Numerical Simulation of Porosity Evolution in Chemical Vapor Infiltration

  2002cites this paper
• Modeling of Gas‐Solid Reactions: Kinetics, Mass and Heat Transfer, and Evolution of the Pore Structure

  2000cites this paper
• A model for front evolution with a nonlocal growth rate

  1999cites this paper
• Combined calcination, sintering and sulfation model for CaCo3‐SO2 reaction

  1999cites this paper
• A stochastic simulation scheme for studying pore volume trapping in a structure of growing particles

  1998cites this paper
• KINETICS OF Mn-BASED SORBENTS FOR HOT COAL GAS DESULFURIZATION

  1997cites this paper
• High reactivity Ca-based sorbents for So2 and As2O3 removal at elevated temperatures : experimental & modeling /

  1997cites this paper
• SINGLE FLUID FLOW IN POROUS MEDIA

  1996cites this paper
• Effective diffusivity changes during calcination, carbonation, recalcination, and sulfation of limestones

  1994cites this paper
• Modeling of a thermal-gradient chemical vapor infiltration process for production of silicon carbide whisker/alumina composite

  1994cites this paper
• Effects of pore structure on the performance of coal gas desulfurization sorbents

  1993cites this paper