Reaction Temperature Manipulation as a Process Intensification Approach for CO<sub>2</sub> Absorption
Reactor temperature manipulation to increase product yields of chemical reactions is a known technique used in many industrial processes. In the case of exothermic chemical reactions, the well-known Le Chatelier’s principle predicts that a decrease in temperature will displace the chemical reaction...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-09-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/18/6522 |
| _version_ | 1797580361038823424 |
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| author | Jorge Federico Gabitto Costas Tsouris |
| author_facet | Jorge Federico Gabitto Costas Tsouris |
| author_sort | Jorge Federico Gabitto |
| collection | DOAJ |
| description | Reactor temperature manipulation to increase product yields of chemical reactions is a known technique used in many industrial processes. In the case of exothermic chemical reactions, the well-known Le Chatelier’s principle predicts that a decrease in temperature will displace the chemical reaction toward the formation of products by increasing the value of the equilibrium constant. The reverse is true for endothermic reactions. Reactor temperature manipulation in an industrial system, however, affects the values of many variables, including physical properties, transport parameters, reaction kinetic parameters, etc. In the case of reactive absorption, some variables change with increasing temperatures due to solute absorption, while others change in such a way that the solute absorption rate decreases. For example, temperature drop increases product formation for exothermic reactions but reduces the value of transport parameters, leading to decreasing interfacial concentrations and absorption rates. Therefore, temperature manipulation strategies must be designed carefully to achieve the process goals. In this work, we theoretically study the use of temperature as a tool to increase CO<sub>2</sub> absorption by solvents in a semi-batch reactor. A computer code has been developed and validated using reported experimental data. Calculated results demonstrate an increase in absorbed CO<sub>2</sub> of more than 28% with respect to the highest temperature used. Despite high agitation and high gas flow rate, the system is mass transfer controlled at short times, becoming kinetically controlled as time increases. An operating strategy to decrease cooling energy costs is also proposed. This study reveals that reactor temperature manipulation can be an effective process to improve CO<sub>2</sub> absorption by solvents in two-phase semi-batch reactors. |
| first_indexed | 2024-03-10T22:48:52Z |
| format | Article |
| id | doaj.art-0791bf3ccb384d839ac198f6e1217bdc |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T22:48:52Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-0791bf3ccb384d839ac198f6e1217bdc2023-11-19T10:26:22ZengMDPI AGEnergies1996-10732023-09-011618652210.3390/en16186522Reaction Temperature Manipulation as a Process Intensification Approach for CO<sub>2</sub> AbsorptionJorge Federico Gabitto0Costas Tsouris1Department of Chemical Engineering, Prairie View A&M University, Prairie View, TX 77446, USAOak Ridge National Laboratory, Oak Ridge, TN 37831, USAReactor temperature manipulation to increase product yields of chemical reactions is a known technique used in many industrial processes. In the case of exothermic chemical reactions, the well-known Le Chatelier’s principle predicts that a decrease in temperature will displace the chemical reaction toward the formation of products by increasing the value of the equilibrium constant. The reverse is true for endothermic reactions. Reactor temperature manipulation in an industrial system, however, affects the values of many variables, including physical properties, transport parameters, reaction kinetic parameters, etc. In the case of reactive absorption, some variables change with increasing temperatures due to solute absorption, while others change in such a way that the solute absorption rate decreases. For example, temperature drop increases product formation for exothermic reactions but reduces the value of transport parameters, leading to decreasing interfacial concentrations and absorption rates. Therefore, temperature manipulation strategies must be designed carefully to achieve the process goals. In this work, we theoretically study the use of temperature as a tool to increase CO<sub>2</sub> absorption by solvents in a semi-batch reactor. A computer code has been developed and validated using reported experimental data. Calculated results demonstrate an increase in absorbed CO<sub>2</sub> of more than 28% with respect to the highest temperature used. Despite high agitation and high gas flow rate, the system is mass transfer controlled at short times, becoming kinetically controlled as time increases. An operating strategy to decrease cooling energy costs is also proposed. This study reveals that reactor temperature manipulation can be an effective process to improve CO<sub>2</sub> absorption by solvents in two-phase semi-batch reactors.https://www.mdpi.com/1996-1073/16/18/6522CO<sub>2</sub> sequestrationreactive absorptionsemi-batch reactortemperature manipulation |
| spellingShingle | Jorge Federico Gabitto Costas Tsouris Reaction Temperature Manipulation as a Process Intensification Approach for CO<sub>2</sub> Absorption Energies CO<sub>2</sub> sequestration reactive absorption semi-batch reactor temperature manipulation |
| title | Reaction Temperature Manipulation as a Process Intensification Approach for CO<sub>2</sub> Absorption |
| title_full | Reaction Temperature Manipulation as a Process Intensification Approach for CO<sub>2</sub> Absorption |
| title_fullStr | Reaction Temperature Manipulation as a Process Intensification Approach for CO<sub>2</sub> Absorption |
| title_full_unstemmed | Reaction Temperature Manipulation as a Process Intensification Approach for CO<sub>2</sub> Absorption |
| title_short | Reaction Temperature Manipulation as a Process Intensification Approach for CO<sub>2</sub> Absorption |
| title_sort | reaction temperature manipulation as a process intensification approach for co sub 2 sub absorption |
| topic | CO<sub>2</sub> sequestration reactive absorption semi-batch reactor temperature manipulation |
| url | https://www.mdpi.com/1996-1073/16/18/6522 |
| work_keys_str_mv | AT jorgefedericogabitto reactiontemperaturemanipulationasaprocessintensificationapproachforcosub2subabsorption AT costastsouris reactiontemperaturemanipulationasaprocessintensificationapproachforcosub2subabsorption |