guest ::
| Home > Conference materials > Papers > Hydrodesulfurization CoMo/Al2O3 and CoMo/C Catalysts Prepared with Nitrilotriacetic Acid without Use of NH4OH |
Original title:
Hydrodesulfurization CoMo/Al2O3 and CoMo/C Catalysts Prepared with Nitrilotriacetic Acid without Use of NH4OH
Authors: Kaluža, Luděk ; Zdražil, Miroslav ; Vít, Zdeněk
Document type: Papers
Conference/Event: International Congress of Chemical and Process Engineering /21./ - CHISA 2014 and Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction /17./ - PRES 2014, Prague (CZ), 2014-08-23 / 2014-08-27
Year: 2014
Language: eng
Abstract: We have calculated and experimentally confirmed that in the catalysts without NTA before sulfidation, the deposited phase takes up only about 5% of the pore volume of Al2O3 support. The deposited Co-Mo-O phase forms a monolayer and all Co-Mo-species are in physical and chemical contact with the support surface. In NTA catalysts before sulfidation, the deposited NTA-Co-Mo phase takes up about 60% of the pore volume of Al2O3. During sulfidation, the metal-support interaction of the majority of the Co and Mo species is blocked not only chemically by their own NTA ligands, but also physically by the surrounding supported solid. The majority of deposited solid in dried NTA catalysts is sulfided as if it were in the unsupported form. This leads to different morphology and structure of Co-Mo sulfides as compared with the catalysts without NTA. It was concluded that the overall NTA action is a combination of not only chemical effects described in the literature, but also of the above physical effect.
Keywords: catalysts; hydrodesulfurization; sulfidation
Project no.: GAP106/11/0902 (CEP)
Funding provider: GA ČR
Host item entry: Final program, ISBN 978-80-02-02555-9
Rights: This work is protected under the Copyright Act No. 121/2000 Coll.
Institution: Institute of Chemical Process Fundamentals AS ČR (web)
Original record: http://hdl.handle.net/11104/0235813
Permalink: http://www.nusl.cz/ntk/nusl-175000
The record appears in these collections:
Research > Institutes ASCR > Institute of Chemical Process Fundamentals
Conference materials > Papers
Authors: Kaluža, Luděk ; Zdražil, Miroslav ; Vít, Zdeněk
Document type: Papers
Conference/Event: International Congress of Chemical and Process Engineering /21./ - CHISA 2014 and Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction /17./ - PRES 2014, Prague (CZ), 2014-08-23 / 2014-08-27
Year: 2014
Language: eng
Abstract: We have calculated and experimentally confirmed that in the catalysts without NTA before sulfidation, the deposited phase takes up only about 5% of the pore volume of Al2O3 support. The deposited Co-Mo-O phase forms a monolayer and all Co-Mo-species are in physical and chemical contact with the support surface. In NTA catalysts before sulfidation, the deposited NTA-Co-Mo phase takes up about 60% of the pore volume of Al2O3. During sulfidation, the metal-support interaction of the majority of the Co and Mo species is blocked not only chemically by their own NTA ligands, but also physically by the surrounding supported solid. The majority of deposited solid in dried NTA catalysts is sulfided as if it were in the unsupported form. This leads to different morphology and structure of Co-Mo sulfides as compared with the catalysts without NTA. It was concluded that the overall NTA action is a combination of not only chemical effects described in the literature, but also of the above physical effect.
Keywords: catalysts; hydrodesulfurization; sulfidation
Project no.: GAP106/11/0902 (CEP)
Funding provider: GA ČR
Host item entry: Final program, ISBN 978-80-02-02555-9
Rights: This work is protected under the Copyright Act No. 121/2000 Coll.
Institution: Institute of Chemical Process Fundamentals AS ČR (web)
Original record: http://hdl.handle.net/11104/0235813
Permalink: http://www.nusl.cz/ntk/nusl-175000
The record appears in these collections:
Research > Institutes ASCR > Institute of Chemical Process Fundamentals
Conference materials > Papers
Record created 2014-09-11, last modified 2023-12-11
Fulltext:
PDFPlný tet:
If you can´t see the document in your browser, save it to your PC and open it in a suitable application.