Adsorption of CO2 and N2 on bimetallic Mg-Al hydrotalcites and Z-13X zeolites under high pressure and moderate temperatures
The adsorption of carbon dioxide on a commercial hydrotalcite (HT) was investigated using gravimetric analysis at 473 K, 573 K and 673 K and pressures up to 10 bar. The CO2 adsorption performance of HT was correlated with a wide range of physicochemical characterisation techniques. For further under...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-03-01
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| Series: | Chemical Engineering Journal Advances |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666821122001971 |
| _version_ | 1828067492956733440 |
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| author | Diana Iruretagoyena Paul Fennell Ronny Pini |
| author_facet | Diana Iruretagoyena Paul Fennell Ronny Pini |
| author_sort | Diana Iruretagoyena |
| collection | DOAJ |
| description | The adsorption of carbon dioxide on a commercial hydrotalcite (HT) was investigated using gravimetric analysis at 473 K, 573 K and 673 K and pressures up to 10 bar. The CO2 adsorption performance of HT was correlated with a wide range of physicochemical characterisation techniques. For further understanding and comparative purposes, the same adsorption and characterisation measurements are reported for a commercial zeolite 13X (Z-13X). The HT exhibited higher adsorption capacities per unit mass of sorbent at relatively low pressures and per unit surface area over the whole range of pressures analysed, compared to zeolite 13X. However, HT showed adsorption-desorption isotherms with a hysteresis loop indicating a stronger binding energy. The HT also presented deactivation upon cycling (up to ∼ 10%, depending on conditions) suggesting the need for future studies focused on improvement of its regenerability. The same performance regarding hysteresis and deactivation was observed in the presence of N2. The CO2 adsorption isotherms of HT were successfully fitted to the Freundlich model. The values of heat of adsorption calculated -56 and -84 kJ mol−1 for the 1st and 5th cycle, are indicative of a chemisorption process. The data of this work provide information regarding fundamentals of CO2 adsorption of the materials that is useful in the design of realistic adsorption units in conventional and novel H2Carbon Dioxide Capture processes, especially in the sorption-enhanced H2 reaction process. |
| first_indexed | 2024-04-10T23:46:21Z |
| format | Article |
| id | doaj.art-d163820ec92a49ffb9cf06c0a2bc5461 |
| institution | Directory Open Access Journal |
| issn | 2666-8211 |
| language | English |
| last_indexed | 2024-04-10T23:46:21Z |
| publishDate | 2023-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Chemical Engineering Journal Advances |
| spelling | doaj.art-d163820ec92a49ffb9cf06c0a2bc54612023-01-11T04:30:23ZengElsevierChemical Engineering Journal Advances2666-82112023-03-0113100437Adsorption of CO2 and N2 on bimetallic Mg-Al hydrotalcites and Z-13X zeolites under high pressure and moderate temperaturesDiana Iruretagoyena0Paul Fennell1Ronny Pini2Corresponding author.; Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UKDepartment of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UKDepartment of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, UKThe adsorption of carbon dioxide on a commercial hydrotalcite (HT) was investigated using gravimetric analysis at 473 K, 573 K and 673 K and pressures up to 10 bar. The CO2 adsorption performance of HT was correlated with a wide range of physicochemical characterisation techniques. For further understanding and comparative purposes, the same adsorption and characterisation measurements are reported for a commercial zeolite 13X (Z-13X). The HT exhibited higher adsorption capacities per unit mass of sorbent at relatively low pressures and per unit surface area over the whole range of pressures analysed, compared to zeolite 13X. However, HT showed adsorption-desorption isotherms with a hysteresis loop indicating a stronger binding energy. The HT also presented deactivation upon cycling (up to ∼ 10%, depending on conditions) suggesting the need for future studies focused on improvement of its regenerability. The same performance regarding hysteresis and deactivation was observed in the presence of N2. The CO2 adsorption isotherms of HT were successfully fitted to the Freundlich model. The values of heat of adsorption calculated -56 and -84 kJ mol−1 for the 1st and 5th cycle, are indicative of a chemisorption process. The data of this work provide information regarding fundamentals of CO2 adsorption of the materials that is useful in the design of realistic adsorption units in conventional and novel H2Carbon Dioxide Capture processes, especially in the sorption-enhanced H2 reaction process.http://www.sciencedirect.com/science/article/pii/S2666821122001971HydrotalcitesCO2 adsorptionFreundlichZeolite 13XN2 adsorptionHeat of adsorption |
| spellingShingle | Diana Iruretagoyena Paul Fennell Ronny Pini Adsorption of CO2 and N2 on bimetallic Mg-Al hydrotalcites and Z-13X zeolites under high pressure and moderate temperatures Chemical Engineering Journal Advances Hydrotalcites CO2 adsorption Freundlich Zeolite 13X N2 adsorption Heat of adsorption |
| title | Adsorption of CO2 and N2 on bimetallic Mg-Al hydrotalcites and Z-13X zeolites under high pressure and moderate temperatures |
| title_full | Adsorption of CO2 and N2 on bimetallic Mg-Al hydrotalcites and Z-13X zeolites under high pressure and moderate temperatures |
| title_fullStr | Adsorption of CO2 and N2 on bimetallic Mg-Al hydrotalcites and Z-13X zeolites under high pressure and moderate temperatures |
| title_full_unstemmed | Adsorption of CO2 and N2 on bimetallic Mg-Al hydrotalcites and Z-13X zeolites under high pressure and moderate temperatures |
| title_short | Adsorption of CO2 and N2 on bimetallic Mg-Al hydrotalcites and Z-13X zeolites under high pressure and moderate temperatures |
| title_sort | adsorption of co2 and n2 on bimetallic mg al hydrotalcites and z 13x zeolites under high pressure and moderate temperatures |
| topic | Hydrotalcites CO2 adsorption Freundlich Zeolite 13X N2 adsorption Heat of adsorption |
| url | http://www.sciencedirect.com/science/article/pii/S2666821122001971 |
| work_keys_str_mv | AT dianairuretagoyena adsorptionofco2andn2onbimetallicmgalhydrotalcitesandz13xzeolitesunderhighpressureandmoderatetemperatures AT paulfennell adsorptionofco2andn2onbimetallicmgalhydrotalcitesandz13xzeolitesunderhighpressureandmoderatetemperatures AT ronnypini adsorptionofco2andn2onbimetallicmgalhydrotalcitesandz13xzeolitesunderhighpressureandmoderatetemperatures |