Kinetic modeling and simulation of catalyst pellet in the high temperature sulfuric acid decomposition section of Iodine-Sulfur process

Thermodynamic Analysis, Kinetics Modeling, and Reactor Model Development for Acetic Acid Hydrogenation Reaction over Bimetallic Pt–Sn Catalyst

“…In order to estimate kinetic parameters, these runs were conducted in kinetic reaction regime, at 0.3–0.6 mm catalyst size, which is chosen for the estimation of kinetic parameters. This regime was chosen after testing the external and internal mass transfer resistances using various catalyst particle sizes and feed flow rates and applying the Mears criterion for external diffusion limitations and Weisz Prater criterion for internal diffusion limitations and finally choosing the resistance-free catalyst size range and feed flow rates. , Heat-transfer limitations were observed to be negligible as the temperature difference between internal catalyst bed and reactor external wall was less than 2 °C. Further, the effect of temperature on conversion was studied for this temperature-dependent reaction in order to determine the kinetic parameters.…”

“…The kinetics of acetic acid hydrogenation , has been studied by researchers in the past, and various rate expressions have been established based on Langmuir–Hinshelwood–Hougen–Watson (LHHW) type reaction kinetics. ,, In this work, we have considered a two site LHHW model for the Pt–Sn bimetallic catalyst system wherein hydrogen is adsorbed over Pt species and oxygen-containing acetyl species are adsorbed on Sn oxides. These acetyl species hydrogenated by spillover hydrogen from adjacent Pt sites to produce ethoxides.…”

“…Thermodynamics allow us to predict a range of favorable parameters without carrying out the reaction; , however, actual reaction parameters depend on the reaction kinetics and catalyst properties. , The extent of reaction system to produce the utmost desired products can be estimated through its thermodynamic analysis. , Henceforth, a comprehensive thermodynamic study of the acetic acid hydrogenation to ethanol is indispensable prior to the strategic development of catalyst and reactor system.…”

Computational design of H 2 SO 4 decomposer combined with SOFC for thermochemical hydrogen production

“…The mass fraction of SO 3 rapidly increased in the region between 300 mm to 500 mm and finally reached the maximum (48.5%). As the reactant flowed into the catalyst section, the SO 3 decomposition initiated and the mass fraction of SO 2 gradually increased until it reached the maximum (33%); the final decomposition ratio of SO 3 was 85.1% by Equation (25). The thermodynamically equilibrated mass fractions of reactants are presented in Figure 10.…”

“…Corgnale et al 24 proposed a novel direct solar receiver-reactor concept to supply the thermochemical cycle with high-temperature heat. Pathak et al 25 experimentally found the kinetic parameters, which were applied for the two-dimensional model. More recently, Sun et al 26 investigated the phase transition during the H 2 SO 4 decomposition using the CFD method.…”