Cobalt ferrite for direct cracking of methane to produce hydrogen and carbon nanostructure: Effect of temperature and methane flow rate
Cobalt ferrite (CoFe2O4) was used as a catalyst for direct methane cracking. The reaction was accomplished in a fixed bed reactor at normal atmospheric pressure, while gas flow rate (20–50 mL/min) and reaction temperature (800–900 °C) were varied. The fresh CoFe2O4 morphology is sponge-like particle...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-05-01
|
| Series: | Journal of Saudi Chemical Society |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1319610323000455 |
| _version_ | 1797804004562960384 |
|---|---|
| author | Abdulrahman I. Alharthi E. Abdel–Fattah Mshari A. Alotaibi Israf Ud Din Amal A. Nassar |
| author_facet | Abdulrahman I. Alharthi E. Abdel–Fattah Mshari A. Alotaibi Israf Ud Din Amal A. Nassar |
| author_sort | Abdulrahman I. Alharthi |
| collection | DOAJ |
| description | Cobalt ferrite (CoFe2O4) was used as a catalyst for direct methane cracking. The reaction was accomplished in a fixed bed reactor at normal atmospheric pressure, while gas flow rate (20–50 mL/min) and reaction temperature (800–900 °C) were varied. The fresh CoFe2O4 morphology is sponge-like particle with inverse spinel structure as revealed from SEM and XRD results. The methane conversions and hydrogen formation rate were increased with reaction temperature, while catalyst stability and induction period decreased. Increases of gas flow rate > 20 mL/min led to a decrease the overall catalytic activity of CoFe2O4 for methane cracking. The XRD results of spent catalysts revealed that CoFe alloy was the active phase of methane cracking. TGA analysis showed that the largest amount of deposited carbon was 70.46 % at (20 mL/min, 900 °C), where it was 34.40 % at (50 mL/min, 800 °C). The deposited carbon has the shape of spherical carbon nanostructures and/or nano sprouts as observed with SEM. Raman data confirmed the graphitization type of the deposited carbon. |
| first_indexed | 2024-03-13T05:29:34Z |
| format | Article |
| id | doaj.art-8d4bffcf2c03434481bd90477d449105 |
| institution | Directory Open Access Journal |
| issn | 1319-6103 |
| language | English |
| last_indexed | 2024-03-13T05:29:34Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Saudi Chemical Society |
| spelling | doaj.art-8d4bffcf2c03434481bd90477d4491052023-06-15T04:54:29ZengElsevierJournal of Saudi Chemical Society1319-61032023-05-01273101641Cobalt ferrite for direct cracking of methane to produce hydrogen and carbon nanostructure: Effect of temperature and methane flow rateAbdulrahman I. Alharthi0E. Abdel–Fattah1Mshari A. Alotaibi2Israf Ud Din3Amal A. Nassar4Department of Chemistry, College of Science and Humanities, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia; Corresponding author.Department of Physics, College of Science and Humanities, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi ArabiaDepartment of Chemistry, College of Science and Humanities, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi ArabiaDepartment of Chemistry, College of Science and Humanities, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi ArabiaDepartment of Chemistry, College of Science and Humanities, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi ArabiaCobalt ferrite (CoFe2O4) was used as a catalyst for direct methane cracking. The reaction was accomplished in a fixed bed reactor at normal atmospheric pressure, while gas flow rate (20–50 mL/min) and reaction temperature (800–900 °C) were varied. The fresh CoFe2O4 morphology is sponge-like particle with inverse spinel structure as revealed from SEM and XRD results. The methane conversions and hydrogen formation rate were increased with reaction temperature, while catalyst stability and induction period decreased. Increases of gas flow rate > 20 mL/min led to a decrease the overall catalytic activity of CoFe2O4 for methane cracking. The XRD results of spent catalysts revealed that CoFe alloy was the active phase of methane cracking. TGA analysis showed that the largest amount of deposited carbon was 70.46 % at (20 mL/min, 900 °C), where it was 34.40 % at (50 mL/min, 800 °C). The deposited carbon has the shape of spherical carbon nanostructures and/or nano sprouts as observed with SEM. Raman data confirmed the graphitization type of the deposited carbon.http://www.sciencedirect.com/science/article/pii/S1319610323000455Cobalt ferriteMethane crackingHydrogen productionTemperatureFlow rateCatalyst |
| spellingShingle | Abdulrahman I. Alharthi E. Abdel–Fattah Mshari A. Alotaibi Israf Ud Din Amal A. Nassar Cobalt ferrite for direct cracking of methane to produce hydrogen and carbon nanostructure: Effect of temperature and methane flow rate Journal of Saudi Chemical Society Cobalt ferrite Methane cracking Hydrogen production Temperature Flow rate Catalyst |
| title | Cobalt ferrite for direct cracking of methane to produce hydrogen and carbon nanostructure: Effect of temperature and methane flow rate |
| title_full | Cobalt ferrite for direct cracking of methane to produce hydrogen and carbon nanostructure: Effect of temperature and methane flow rate |
| title_fullStr | Cobalt ferrite for direct cracking of methane to produce hydrogen and carbon nanostructure: Effect of temperature and methane flow rate |
| title_full_unstemmed | Cobalt ferrite for direct cracking of methane to produce hydrogen and carbon nanostructure: Effect of temperature and methane flow rate |
| title_short | Cobalt ferrite for direct cracking of methane to produce hydrogen and carbon nanostructure: Effect of temperature and methane flow rate |
| title_sort | cobalt ferrite for direct cracking of methane to produce hydrogen and carbon nanostructure effect of temperature and methane flow rate |
| topic | Cobalt ferrite Methane cracking Hydrogen production Temperature Flow rate Catalyst |
| url | http://www.sciencedirect.com/science/article/pii/S1319610323000455 |
| work_keys_str_mv | AT abdulrahmanialharthi cobaltferritefordirectcrackingofmethanetoproducehydrogenandcarbonnanostructureeffectoftemperatureandmethaneflowrate AT eabdelfattah cobaltferritefordirectcrackingofmethanetoproducehydrogenandcarbonnanostructureeffectoftemperatureandmethaneflowrate AT mshariaalotaibi cobaltferritefordirectcrackingofmethanetoproducehydrogenandcarbonnanostructureeffectoftemperatureandmethaneflowrate AT israfuddin cobaltferritefordirectcrackingofmethanetoproducehydrogenandcarbonnanostructureeffectoftemperatureandmethaneflowrate AT amalanassar cobaltferritefordirectcrackingofmethanetoproducehydrogenandcarbonnanostructureeffectoftemperatureandmethaneflowrate |