Nature of active sites in Ni2P hydrotreating catalysts as probed by iron substitution
書誌事項
- 公開日
- 2015-03
- 資源種別
- journal article
- 権利情報
-
- https://www.elsevier.com/tdm/userlicense/1.0/
- https://www.elsevier.com/legal/tdmrep-license
- http://www.elsevier.com/open-access/userlicense/1.0/
- https://doi.org/10.15223/policy-017
- https://doi.org/10.15223/policy-037
- https://doi.org/10.15223/policy-012
- https://doi.org/10.15223/policy-029
- https://doi.org/10.15223/policy-004
- DOI
-
- 10.1016/j.apcatb.2014.09.010
- 公開者
- Elsevier BV
この論文をさがす
説明
Abstract A series of NiFeP/SiO2 catalysts with different Ni:Fe molar ratios (1:0, 3:1, 1:1, 1:3, 0:1) was investigated for the hydrodesulfurization (HDS) of 4,6-dimethyldibenzothiophene. The Fe component is a good probe for active sites because Ni2P and Fe2P adopt the same hexagonal crystal structure, yet Fe2P is completely inactive for HDS. X-ray diffraction analysis and FTIR spectroscopy of adsorbed CO indicated the formation homologous alloys. At 3.1 MPa and 613 K (340 °C) the activity of the alloys was similar to that of Ni2P, which was very high. There was also unprecedented selectivity toward direct desulfurization (DDS). A reconstruction of the NiFe phase occurred to expose more Ni sites, likely driven by the formation of surface Ni-S bonds as observed by EXAFS. The analysis showed that Ni(2) pyramidal sites responsible for hydrogenation were largely replaced by Fe. This left behind Ni(1) tetrahedral sites which favor DDS and explains the reactivity results.
収録刊行物
-
- Applied Catalysis B: Environmental
-
Applied Catalysis B: Environmental 164 204-216, 2015-03
Elsevier BV
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1360002215801367296
-
- ISSN
- 09263373
-
- 資料種別
- journal article
-
- データソース種別
-
- Crossref
- KAKEN
- OpenAIRE
