TY - JOUR

T1 - Analysis of the Macrokinetics of CO2 Sorption on 10%NaNO3/MgO Sorbent and Modeling of an Adsorber with a Hydrogen Capacity of 10 kg/h

AU - Shigarov, A. B.

AU - Nikulina, I. E.

AU - Pakharukova, V. P.

AU - Potemkin, D. I.

N1 - The work was financially supported the Russian Science Foundation within the framework of project no. 21-79-10377 (https://www.rscf.ru/project/21-79-10377/). Analysis of the Macrokinetics of CO2 Sorption on 10%NaNO3/MgO Sorbent and Modeling of an Adsorber with a Hydrogen Capacity of 10 kg/h / A. B. Shigarov, I. E. Nikulina, V. P. Pakharukova, D. I. Potemkin // Catalysis in Industry. – 2025. – Vol. 17, No. 2. – P. 92-102. – DOI 10.1134/S2070050425700011.

PY - 2025/6/24

Y1 - 2025/6/24

N2 - This study proposes a first-order macrokinetic model for CO2 sorption on a 10 mol % NaNO3/MgO sorbent. According to the experimental gravimetric data, the maximum sorption capacity of the 10 mol % NaNO3/MgO sorbent is determined and does not depend on the partial pressure of CO2; at 320°C it is equal to 159% (based on the initial mass of the sample) or 13.4 mmol CO2/gsorb. The calculated value of the sorption constant kads at temperatures of 280–320°C and a CO2 partial pressure of 0.50–0.75 atm is 0.017 min–1 atm–1. Based on the obtained kinetics, modeling of adiabatic and isothermal CO2 adsorbers was performed within the framework of the technological scheme for producing 10 kg/h of hydrogen from natural gas at an operating pressure of 12 atm. The calculations showed that for the adsorber to function effectively intensive removal of the heat released during the sorption process is necessary. This allows for the sorption of CO2 for 30 min at a temperature of 300°C and a gas hourly space velocity GHSV = 1170 h–1, while the concentration of CO2 at the outlet in dry gas does not exceed 1.5 mol %.

AB - This study proposes a first-order macrokinetic model for CO2 sorption on a 10 mol % NaNO3/MgO sorbent. According to the experimental gravimetric data, the maximum sorption capacity of the 10 mol % NaNO3/MgO sorbent is determined and does not depend on the partial pressure of CO2; at 320°C it is equal to 159% (based on the initial mass of the sample) or 13.4 mmol CO2/gsorb. The calculated value of the sorption constant kads at temperatures of 280–320°C and a CO2 partial pressure of 0.50–0.75 atm is 0.017 min–1 atm–1. Based on the obtained kinetics, modeling of adiabatic and isothermal CO2 adsorbers was performed within the framework of the technological scheme for producing 10 kg/h of hydrogen from natural gas at an operating pressure of 12 atm. The calculations showed that for the adsorber to function effectively intensive removal of the heat released during the sorption process is necessary. This allows for the sorption of CO2 for 30 min at a temperature of 300°C and a gas hourly space velocity GHSV = 1170 h–1, while the concentration of CO2 at the outlet in dry gas does not exceed 1.5 mol %.

KW - MAGNESIUM OXIDE

KW - ADSORBER

KW - MODELING

KW - KINETICS

KW - CO2 SORPTION

UR - https://www.mendeley.com/catalogue/2b9c3449-2454-34f2-8de3-d49daf3b3380/

UR - https://www.scopus.com/pages/publications/105009259266

UR - https://www.elibrary.ru/item.asp?id=82565700

U2 - 10.1134/s2070050425700011

DO - 10.1134/s2070050425700011

M3 - Article

VL - 17

SP - 92

EP - 102

JO - Catalysis in Industry

JF - Catalysis in Industry

SN - 2070-0504

IS - 2

ER -