Evidence of ammonia synthesis by bulk diffusion in cobalt molybdenum particles in a CLAS process
For the first time ammonia-synthesis-on-nitridation has been reported in CoMo during a chemical looping ammonia synthesis experiment. The observation lends evidence to the existence of a dynamic surface, a shrinking core and counter diffusion. The Mars-van Krevlen mechanism involving surface and bul...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-07-01
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| Series: | Catalysis Communications |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1566736722000437 |
| _version_ | 1818006373770723328 |
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| author | Sean W. Brown Changle Jiang Qiang Wang Ashley Caiola Jianli Hu |
| author_facet | Sean W. Brown Changle Jiang Qiang Wang Ashley Caiola Jianli Hu |
| author_sort | Sean W. Brown |
| collection | DOAJ |
| description | For the first time ammonia-synthesis-on-nitridation has been reported in CoMo during a chemical looping ammonia synthesis experiment. The observation lends evidence to the existence of a dynamic surface, a shrinking core and counter diffusion. The Mars-van Krevlen mechanism involving surface and bulk exchange has been established for the CoMo system under H2:N2 atmospheres was extended into the CLAS domain and complicated by the existence of an unreacted oxide core containing molybdenum bronzes, HxMoO3. This OH−1 diffuses outward as the core is stabilized by N−3, resulting in the observation of gas phase H2O and NH3 in the absence of gaseous H2. |
| first_indexed | 2024-04-14T05:00:12Z |
| format | Article |
| id | doaj.art-e012c0a6fef84ba9ba519ac5c49ef73f |
| institution | Directory Open Access Journal |
| issn | 1873-3905 |
| language | English |
| last_indexed | 2024-04-14T05:00:12Z |
| publishDate | 2022-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Catalysis Communications |
| spelling | doaj.art-e012c0a6fef84ba9ba519ac5c49ef73f2022-12-22T02:10:59ZengElsevierCatalysis Communications1873-39052022-07-01167106438Evidence of ammonia synthesis by bulk diffusion in cobalt molybdenum particles in a CLAS processSean W. Brown0Changle Jiang1Qiang Wang2Ashley Caiola3Jianli Hu4Department of Chemical and Biomedical Engineering, Benjamin M. Statler College of Engineering and Mineral Resources, West Virginia University, 395 Evansdale Drive, Morgantown, WV 26505, United States of AmericaDepartment of Chemical and Biomedical Engineering, Benjamin M. Statler College of Engineering and Mineral Resources, West Virginia University, 395 Evansdale Drive, Morgantown, WV 26505, United States of AmericaShared Research Facilities, 1306 Evansdale Drive, P.O. Box 6101, Morgantown, WV 26506, United States of America; Department of Physics and Astronomy, White Hall, Box 6315, West Virginia University, Morgantown, WV 26506-6315, United States of AmericaDepartment of Chemical and Biomedical Engineering, Benjamin M. Statler College of Engineering and Mineral Resources, West Virginia University, 395 Evansdale Drive, Morgantown, WV 26505, United States of AmericaDepartment of Chemical and Biomedical Engineering, Benjamin M. Statler College of Engineering and Mineral Resources, West Virginia University, 395 Evansdale Drive, Morgantown, WV 26505, United States of America; Corresponding author.For the first time ammonia-synthesis-on-nitridation has been reported in CoMo during a chemical looping ammonia synthesis experiment. The observation lends evidence to the existence of a dynamic surface, a shrinking core and counter diffusion. The Mars-van Krevlen mechanism involving surface and bulk exchange has been established for the CoMo system under H2:N2 atmospheres was extended into the CLAS domain and complicated by the existence of an unreacted oxide core containing molybdenum bronzes, HxMoO3. This OH−1 diffuses outward as the core is stabilized by N−3, resulting in the observation of gas phase H2O and NH3 in the absence of gaseous H2.http://www.sciencedirect.com/science/article/pii/S1566736722000437NitrideChemical loopingAmmonia synthesisCobalt molybdenum |
| spellingShingle | Sean W. Brown Changle Jiang Qiang Wang Ashley Caiola Jianli Hu Evidence of ammonia synthesis by bulk diffusion in cobalt molybdenum particles in a CLAS process Catalysis Communications Nitride Chemical looping Ammonia synthesis Cobalt molybdenum |
| title | Evidence of ammonia synthesis by bulk diffusion in cobalt molybdenum particles in a CLAS process |
| title_full | Evidence of ammonia synthesis by bulk diffusion in cobalt molybdenum particles in a CLAS process |
| title_fullStr | Evidence of ammonia synthesis by bulk diffusion in cobalt molybdenum particles in a CLAS process |
| title_full_unstemmed | Evidence of ammonia synthesis by bulk diffusion in cobalt molybdenum particles in a CLAS process |
| title_short | Evidence of ammonia synthesis by bulk diffusion in cobalt molybdenum particles in a CLAS process |
| title_sort | evidence of ammonia synthesis by bulk diffusion in cobalt molybdenum particles in a clas process |
| topic | Nitride Chemical looping Ammonia synthesis Cobalt molybdenum |
| url | http://www.sciencedirect.com/science/article/pii/S1566736722000437 |
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