Synthesis and evaluation of the cobalt-promoted NiO/CaO.2Al2O3 catalysts in CO2 methanation reaction: Effect of different promoters
This work is concentrated on designing of CO2 methanation process over nickel-based catalysts doped by different promoters (CuO, Cr2O3, Co3O4, Fe2O3, and MnO2) supported on CaO.2Al2O3 powder. The CaO-Al2O3 powder was fabricated by mechanochemical method, and catalysts were synthesized via a wet impr...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-09-01
|
| Series: | Journal of CO2 Utilization |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2212982023001889 |
| _version_ | 1827819231042863104 |
|---|---|
| author | Amirhosein Rajabzadeh Nobakht Mehran Rezaei Seyed Mehdi Alavi Ehsan Akbari Mohammad Varbar |
| author_facet | Amirhosein Rajabzadeh Nobakht Mehran Rezaei Seyed Mehdi Alavi Ehsan Akbari Mohammad Varbar |
| author_sort | Amirhosein Rajabzadeh Nobakht |
| collection | DOAJ |
| description | This work is concentrated on designing of CO2 methanation process over nickel-based catalysts doped by different promoters (CuO, Cr2O3, Co3O4, Fe2O3, and MnO2) supported on CaO.2Al2O3 powder. The CaO-Al2O3 powder was fabricated by mechanochemical method, and catalysts were synthesized via a wet impregnation procedure. The characterization properties of all samples were tested by XRD, BET, TPR, FESEM, and EDS-mapping analyses. The optimum amount of NiO was selected at 10 wt% along with CaO:Al2O3 as support with the molar ratio of 1:2. The Co-doped catalyst showed the lowest pore size (9.4 nm) and the highest surface area (106 m2.g−1) among the promoted catalysts. The results exhibited that the Co3O4(3)-NiO(10)/CaO.2Al2O3 catalyst possessed superior catalytic performance in the CO2 methanation reaction. The results illustrated that the increase in cobalt oxide percentage up to 3 wt% improved catalytic performance. However, further augmentation in the Co3O4 from 3 to 7 wt% diminished the specific surface area. According to the performance tests, carbon dioxide conversion and methane selectivity were 83.1% and 99.5% at 450 °C under operating conditions (GHSV = 18,000 ml.gcat−1.h−1 and H2:CO2 = 4:1) over this catalyst. The processing conditions including calcination temperature, reduction temperature, GHSV, feed ratio, and long-term stability test were also examined over the selected catalyst. Outcomes revealed that CO2 conversion increased with a decrement in calcination temperature from 650° to 450°C. Also, chosen catalyst reduced at 650 °C showed the highest performance. Besides, catalytic performance enhanced by raising feed ratio (H2:CO2) from 2:1 to 5:1 and decreased with augmentation of GHSV from 12,000 to 30,000 ml.gcat−1.h−1. Moreover, Co3O4(3)-NiO(10)/CaO.2Al2O3 catalyst possessed high stability during 14 h time on stream. |
| first_indexed | 2024-03-12T01:11:07Z |
| format | Article |
| id | doaj.art-c852fbf9d92d4aaea4a4191cd027f88c |
| institution | Directory Open Access Journal |
| issn | 2212-9839 |
| language | English |
| last_indexed | 2024-03-12T01:11:07Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of CO2 Utilization |
| spelling | doaj.art-c852fbf9d92d4aaea4a4191cd027f88c2023-09-14T04:53:33ZengElsevierJournal of CO2 Utilization2212-98392023-09-0175102577Synthesis and evaluation of the cobalt-promoted NiO/CaO.2Al2O3 catalysts in CO2 methanation reaction: Effect of different promotersAmirhosein Rajabzadeh Nobakht0Mehran Rezaei1Seyed Mehdi Alavi2Ehsan Akbari3Mohammad Varbar4College of Chemical, Petroleum and Gas Engineering, Catalyst and Nanomaterials Research laboratory (CNMRL), Iran University of Science and Technology, Tehran, IranCorresponding authors.; College of Chemical, Petroleum and Gas Engineering, Catalyst and Nanomaterials Research laboratory (CNMRL), Iran University of Science and Technology, Tehran, IranCorresponding authors.; College of Chemical, Petroleum and Gas Engineering, Catalyst and Nanomaterials Research laboratory (CNMRL), Iran University of Science and Technology, Tehran, IranCollege of Chemical, Petroleum and Gas Engineering, Catalyst and Nanomaterials Research laboratory (CNMRL), Iran University of Science and Technology, Tehran, IranCollege of Chemical, Petroleum and Gas Engineering, Catalyst and Nanomaterials Research laboratory (CNMRL), Iran University of Science and Technology, Tehran, IranThis work is concentrated on designing of CO2 methanation process over nickel-based catalysts doped by different promoters (CuO, Cr2O3, Co3O4, Fe2O3, and MnO2) supported on CaO.2Al2O3 powder. The CaO-Al2O3 powder was fabricated by mechanochemical method, and catalysts were synthesized via a wet impregnation procedure. The characterization properties of all samples were tested by XRD, BET, TPR, FESEM, and EDS-mapping analyses. The optimum amount of NiO was selected at 10 wt% along with CaO:Al2O3 as support with the molar ratio of 1:2. The Co-doped catalyst showed the lowest pore size (9.4 nm) and the highest surface area (106 m2.g−1) among the promoted catalysts. The results exhibited that the Co3O4(3)-NiO(10)/CaO.2Al2O3 catalyst possessed superior catalytic performance in the CO2 methanation reaction. The results illustrated that the increase in cobalt oxide percentage up to 3 wt% improved catalytic performance. However, further augmentation in the Co3O4 from 3 to 7 wt% diminished the specific surface area. According to the performance tests, carbon dioxide conversion and methane selectivity were 83.1% and 99.5% at 450 °C under operating conditions (GHSV = 18,000 ml.gcat−1.h−1 and H2:CO2 = 4:1) over this catalyst. The processing conditions including calcination temperature, reduction temperature, GHSV, feed ratio, and long-term stability test were also examined over the selected catalyst. Outcomes revealed that CO2 conversion increased with a decrement in calcination temperature from 650° to 450°C. Also, chosen catalyst reduced at 650 °C showed the highest performance. Besides, catalytic performance enhanced by raising feed ratio (H2:CO2) from 2:1 to 5:1 and decreased with augmentation of GHSV from 12,000 to 30,000 ml.gcat−1.h−1. Moreover, Co3O4(3)-NiO(10)/CaO.2Al2O3 catalyst possessed high stability during 14 h time on stream.http://www.sciencedirect.com/science/article/pii/S2212982023001889CO2 methanationCo3O4-NiO/CaO.2Al2O3 catalystPromoterCobalt oxideCO2 conversion |
| spellingShingle | Amirhosein Rajabzadeh Nobakht Mehran Rezaei Seyed Mehdi Alavi Ehsan Akbari Mohammad Varbar Synthesis and evaluation of the cobalt-promoted NiO/CaO.2Al2O3 catalysts in CO2 methanation reaction: Effect of different promoters Journal of CO2 Utilization CO2 methanation Co3O4-NiO/CaO.2Al2O3 catalyst Promoter Cobalt oxide CO2 conversion |
| title | Synthesis and evaluation of the cobalt-promoted NiO/CaO.2Al2O3 catalysts in CO2 methanation reaction: Effect of different promoters |
| title_full | Synthesis and evaluation of the cobalt-promoted NiO/CaO.2Al2O3 catalysts in CO2 methanation reaction: Effect of different promoters |
| title_fullStr | Synthesis and evaluation of the cobalt-promoted NiO/CaO.2Al2O3 catalysts in CO2 methanation reaction: Effect of different promoters |
| title_full_unstemmed | Synthesis and evaluation of the cobalt-promoted NiO/CaO.2Al2O3 catalysts in CO2 methanation reaction: Effect of different promoters |
| title_short | Synthesis and evaluation of the cobalt-promoted NiO/CaO.2Al2O3 catalysts in CO2 methanation reaction: Effect of different promoters |
| title_sort | synthesis and evaluation of the cobalt promoted nio cao 2al2o3 catalysts in co2 methanation reaction effect of different promoters |
| topic | CO2 methanation Co3O4-NiO/CaO.2Al2O3 catalyst Promoter Cobalt oxide CO2 conversion |
| url | http://www.sciencedirect.com/science/article/pii/S2212982023001889 |
| work_keys_str_mv | AT amirhoseinrajabzadehnobakht synthesisandevaluationofthecobaltpromotedniocao2al2o3catalystsinco2methanationreactioneffectofdifferentpromoters AT mehranrezaei synthesisandevaluationofthecobaltpromotedniocao2al2o3catalystsinco2methanationreactioneffectofdifferentpromoters AT seyedmehdialavi synthesisandevaluationofthecobaltpromotedniocao2al2o3catalystsinco2methanationreactioneffectofdifferentpromoters AT ehsanakbari synthesisandevaluationofthecobaltpromotedniocao2al2o3catalystsinco2methanationreactioneffectofdifferentpromoters AT mohammadvarbar synthesisandevaluationofthecobaltpromotedniocao2al2o3catalystsinco2methanationreactioneffectofdifferentpromoters |