Kinetic study of the CO2 desorption process by carbonated Na2ZrO3 solid absorbent

Villa, Andrea; Gutiérrez, Jesús Salinas; Gómez, Carmen Julia Navarro; Ríos, Gilberto Sandino Aquino de los; Villalobos, M. Rentería; Palacios, L. Cortés; López-Ortíz, Alejandro; Collins-Martı́nez, V.

doi:10.1016/j.ijhydene.2015.08.036

Cited by 14 publications

(3 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The global rate of decarbonation or regeneration of sorbent is found to follow approximately around second-order reaction (Figure ) with CO 2 concentration in gas mixture. This indicates the uniform thermal decomposition process of CaCO 3 which was in agreement with the reported order of reaction that varied in the range of 0.5–2.084 for sorbent regeneration. , The overall intrinsic reaction resistance energy, limited by the formation and rupture of chemical bonds, results in the form of calculated activation energy. ,, Calcination reaction rate depends on calcination temperature and CO 2 partial pressure, but it does not depend on CaCO 3 content and particle lifetime …”

Section: Resultssupporting

confidence: 83%

Calcination Thermokinetics of Carbon Capture Using Coal Fly Ash Stabilized Sorbent

et al. 2018

View full text Add to dashboard Cite

There exists an ever increasing demand for coal fly ash stabilized sorbents which are thermally stable up to multiple carbon capture cycles at high temperatures (up to 950 °C). The industrial scale-up of this sorbent's regeneration is limited by its inherent kinetics and thermodynamics that need to be maneuvered carefully to make it economically viable. In this study, sorbents regeneration kinetic and thermodynamic parameters have been estimated under nonisothermal conditions using thermogravimetric analysis. The Coats and Redfern equation has been chosen to estimate thermokinetic parameters under nonisothermal conditions. The thermodynamic values of Gibbs free energy, entropy, enthalpy, etc., for the synthesized sorbent (CaO50MgO10FA-C40) were compared with the simulated values (HSC software) with and without fly ash. The experimental data of sorbent regeneration was then fit into a suitable kinetic equation, based on the classic grain model and studied at various isothermal calcination temperatures. Sorbent calcination conversion efficiencies with model fit have been studied in packed-bed reactor under CO 2 partial pressures ranging from 0 to 100 kPa and at various calcination cycles of the sorbent. A table of comparison has been presented on sorbent regeneration activation energies of reported and experimentally estimated values in this work.

show abstract

Section: Resultssupporting

confidence: 83%

Calcination Thermokinetics of Carbon Capture Using Coal Fly Ash Stabilized Sorbent

et al. 2018

View full text Add to dashboard Cite

show abstract

“…2017, 7, 609 9 of 11 the adsorption site of the silica gel surface. The interaction between silica gel adsorbent and toluene is very probably physical adsorption, since its apparent activation energy is lower than 83 kJ/mol, which can characterize an absorption process controlled by chemical reactions [28].…”

Section: Toluene Thermal Desorptionmentioning

confidence: 99%

“…Sci. 2017, 7, 609 9 of 11 toluene is very probably physical adsorption, since its apparent activation energy is lower than 83 kJ/mol, which can characterize an absorption process controlled by chemical reactions [28]. The Van't Hoff equation was used to evaluate the enthalpy of thermal desorption.…”

Section: Toluene Thermal Desorptionmentioning

confidence: 99%

Kinetics Study of Gas Pollutant Adsorption and Thermal Desorption on Silica Gel

Rong

Pang

et al. 2017

Applied Sciences

View full text Add to dashboard Cite

Silica gel is a typical porous desiccant material. Its adsorption performance for gaseous air pollutants was investigated to determine its potential contribution to reducing such pollutants. Three gaseous air pollutants, toluene, carbon dioxide, and methane, were investigated in this paper. A thermogravimetric analyzer was used to obtain the equilibrium adsorption capacity of gases on single silica gel particles. The silica gel adsorption capacity for toluene is much higher than that for carbon dioxide and methane. To understand gas pollutant thermal desorption from silica gel, the thermogravimetric analysis of toluene desorption was conducted with 609 ppm toluene vapor at 313 K, 323 K, and 333 K. The overall regeneration rate of silica gel was strongly dependent on temperature and the enthalpy of desorption. The gas pollutant adsorption performance and thermal desorption on silica gel material may be used to estimate the operating and design parameters for gas pollutant adsorption by desiccant wheels.

show abstract

Lithium silicates synthetized from iron and steel slags as high temperature CO2 adsorbent materials

Alcántar-Vázquez

Ramírez-Zamora

2020

Adsorption

View full text Add to dashboard Cite

Kinetic study of the CO2 desorption process by carbonated Na2ZrO3 solid absorbent

Cited by 14 publications

References 9 publications

Calcination Thermokinetics of Carbon Capture Using Coal Fly Ash Stabilized Sorbent

Calcination Thermokinetics of Carbon Capture Using Coal Fly Ash Stabilized Sorbent

Kinetics Study of Gas Pollutant Adsorption and Thermal Desorption on Silica Gel

Lithium silicates synthetized from iron and steel slags as high temperature CO2 adsorbent materials

Contact Info

Product

Resources

About