A Comprehensive Kinetic Study of the Reaction of SO2with CaO by the Random Pore Model

2014 ◽  
Vol 37 (12) ◽  
pp. 2037-2046 ◽  
Author(s):  
Hadi Moshiri ◽  
Bahram Nasernejad ◽  
Habib Ale Ebrahim ◽  
Mahboobeh Taheri
Keyword(s):  
Kinetic Study ◽  
Pore Model ◽  
Random Pore Model

scholarly journals Kinetic Study of Low Temperature Sulfur Dioxide Removal Reaction By Sodium Carbonate Using Random Pore Model

2021 ◽  
Author(s):  
Iman Omidi ◽  
Habib Ale Ebrahim
Keyword(s):  
Low Temperature ◽  
Kinetic Study ◽  
Sodium Carbonate ◽  
Power Plants ◽  
Product Layer ◽  
Order Kinetic ◽  
Time Data ◽  
Pore Model ◽  
Model Predictions ◽  
Random Pore Model

Abstract An experimental investigation of low temperature SO2 removal by porous sodium carbonate was carried out by thermogravimetry. As well as, applied mathematical modeling based on the random pore model was employed to kinetic study of this reaction. The experiments were performed at various temperatures (100-250 oC) and different SO2 concentrations (0.13-1.12 vol%). The initial slopes procedure was used to determine dependency of the reaction rate constants versus temperature. First-order kinetic with respect to gaseous reactant was found and value of activation energy was attained as 22.5 kJ mol-1. Product layer diffusion coefficients were evaluated by the best fitting of experimental data with the model predictions. These random pore model predictions indicated good agreement with experimental conversion-time data at various conditions. The resulted kinetic parameters were avail abled for engineering calculations of SO2 abatement from the coal-based power plants by low-temperature flue gas desulfurization.

scholarly journals Kinetic study of CO2 reaction with CaO by a modified random pore model

2016 ◽  
Vol 18 (1) ◽  
pp. 93-98 ◽  
Author(s):  
S.M.M. Nouri ◽  
H. Ale Ebrahim
Keyword(s):  
Mercury Porosimetry ◽  
Nitrogen Adsorption ◽  
Intrinsic Rate ◽  
Product Layer ◽  
Carbonation Reaction ◽  
Pore Model ◽  
Partial Pressures ◽  
Pore Size Distributions ◽  
Kinetics Of ◽  
Random Pore Model

Abstract In this work, a modified random pore model was developed to study the kinetics of the carbonation reaction of CaO. Pore size distributions of the CaO pellets were measured by nitrogen adsorption and mercury porosimetry methods. The experiments were carried out in a thermogravimeter at different isothermal temperatures and CO2 partial pressures. A fractional concentration dependency function showed the best accuracy for predicting the intrinsic rate of reaction. The activation energy was determined as 11 kcal/mole between 550–700°C. The effect of product layer formation was also taken into account by using the variable product layer diffusivity. Also, the model was successfully predicted the natural lime carbonation reaction data extracted from the literature.

A random pore model for fluid-solid reactions: II. Diffusion and transport effects

AIChE Journal ◽  
1981 ◽  
Vol 27 (2) ◽  
pp. 247-254 ◽  
Author(s):  
S. K. Bhatia ◽  
D. D. Perlmutter
Keyword(s):  
Pore Model ◽  
Transport Effects ◽  
Random Pore Model
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