Synthesis, characterization and catalytic performance of nanosized iron-cobalt catalysts for light olefins production

doi:10.1016/S1003-9953(10)60241-1

能源化学(英文) ›› 2011, Vol. 20 ›› Issue (6): 677-686.DOI: 10.1016/S1003-9953(10)60241-1

Synthesis, characterization and catalytic performance of nanosized iron-cobalt catalysts for light olefins production

Mostafa Feyzi^1,2*, Asadollah Hassankhani²

1. Faculty of Chemistry, Razi University, P. O. Box: +98-67149, Kermanshah, Iran; 2. Department of Materials Science, International Center for Science, High
Technology & Environmental Sciences, P.O.Box: +98-76315-117, Kerman, Iran

收稿日期:2011-02-25 修回日期:2011-05-03 出版日期:2011-11-20 发布日期:2011-11-18
通讯作者: Mostafa Feyzi

Synthesis, characterization and catalytic performance of nanosized iron-cobalt catalysts for light olefins production

Mostafa Feyzi^1,2*, Asadollah Hassankhani²

1. Faculty of Chemistry, Razi University, P. O. Box: +98-67149, Kermanshah, Iran; 2. Department of Materials Science, International Center for Science, High
Technology & Environmental Sciences, P.O.Box: +98-76315-117, Kerman, Iran

Received:2011-02-25 Revised:2011-05-03 Online:2011-11-20 Published:2011-11-18
Contact: Mostafa Feyzi

摘要/Abstract

摘要： Nanosized Fe-Co catalysts were prepared by co-precipitation method and studied for the conversion of synthesis gas to light olefins. In particular, the effects of a range of preparation variables such as Co/Fe molar ratios of the precipitation solution, pH value of precipitate, temperature of precipitation, promoters and loading of optimum promoter on the structure and catalytic performance are investigated. The optimal nano catalyst for light olefins (C₂–C₄) production was obtained over the catalyst with Co/Fe molar ratio of 3/1 which promoted with 2 wt% K. The results show that the best operational conditions were GHSV = 2200 h^-¹ (H₂/CO = 2/1) at 260 ℃ under atmospheric pressure. Characterization of catalysts were carried out using X-ray diffraction (XRD), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and N₂ physisorption measurements such as Brunauer-Emmett-Teller (BET) and Barrett-Joyner-Halenda (BJH) methods.

关键词: light olefins, catalytic performance, operational condition, characterization

Abstract: Nanosized Fe-Co catalysts were prepared by co-precipitation method and studied for the conversion of synthesis gas to light olefins. In particular, the effects of a range of preparation variables such as Co/Fe molar ratios of the precipitation solution, pH value of precipitate, temperature of precipitation, promoters and loading of optimum promoter on the structure and catalytic performance are investigated. The optimal nano catalyst for light olefins (C₂–C₄) production was obtained over the catalyst with Co/Fe molar ratio of 3/1 which promoted with 2 wt% K. The results show that the best operational conditions were GHSV = 2200 h^-¹ (H₂/CO = 2/1) at 260 ℃ under atmospheric pressure. Characterization of catalysts were carried out using X-ray diffraction (XRD), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and N₂ physisorption measurements such as Brunauer-Emmett-Teller (BET) and Barrett-Joyner-Halenda (BJH) methods.

Key words: light olefins, catalytic performance, operational condition, characterization

Mostafa Feyzi*, Asadollah Hassankhani. Synthesis, characterization and catalytic performance of nanosized iron-cobalt catalysts for light olefins production[J]. 能源化学(英文), 2011, 20(6): 677-686.

Mostafa Feyzi*, Asadollah Hassankhani. Synthesis, characterization and catalytic performance of nanosized iron-cobalt catalysts for light olefins production[J]. Journal of Energy Chemistry, 2011, 20(6): 677-686.

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Synthesis, characterization and catalytic performance of nanosized iron-cobalt catalysts for light olefins production

Synthesis, characterization and catalytic performance of nanosized iron-cobalt catalysts for light olefins production

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