Promotion of Co/SiO2 Fischer–Tropsch catalysts with zirconium

Moradi, Gholamreza; Basir, M.M; Taeb, Abbas; Kiennemann, A.

doi:10.1016/s1566-7367(02)00243-1

Cited by 87 publications

(48 citation statements)

References 12 publications

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“…Thus, there may exist a synergy effect between the cobalt and cerium ions [4,30]. Taking into consideration previous reported results [31,32], we postulate that this increase in catalytic activity is due to a higher reducibility of cobalt oxides and the increase in the amount of metallic atoms on the surface caused by the increase of cerium added. Detailed investigation of the interaction between the cobalt and cerium is still in progress.…”

Section: Catalytic Testing Of Co/ce-sba-15mentioning

confidence: 63%

Synthesis of mesoporous Co/Ce-SBA-15 materials and their catalytic performance in the catalytic oxidation of benzene

Tian

et al. 2008

Materials Research Bulletin

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Cerium-containing SBA-15 mesoporous materials, with different Ce/Si molar ratios, were synthesized by a direct hydrothermal synthesis method and further modified by impregnation with 10, 15 and 20 wt.% Co. Characterizations by powder X-ray diffraction (XRD), N 2 sorption, inductively coupled plasma (ICP) and UV-vis spectroscopy were carried out. The small-angle XRD and N 2 sorption characterizations showed that these Co supported materials have less-ordered mesoporous structures with partial blockage of pores, and their specific surface area, pore volume and pore size were relatively lower than those of unsupported ceriumcontaining SBA-15. Spinel Co 3 O 4 constituted the predominant cobalt phase in the prepared catalysts, and CeO 2 was also detected. All the Co supported catalysts exhibited high catalytic activity in the oxidation of benzene. #

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Section: Catalytic Testing Of Co/ce-sba-15mentioning

confidence: 63%

Synthesis of mesoporous Co/Ce-SBA-15 materials and their catalytic performance in the catalytic oxidation of benzene

Tian

et al. 2008

Materials Research Bulletin

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“…Based on early literature reports revealing the improved selectivity of C5+ hydrocarbons due to addition of Zr as promotor to Co-based Fischer-Tropsch catalysts [278][279][280], Huang et al [258] prepared H-ZSM-5 enwrapped CoZr catalyst particles and evaluated their activity for the direct synthesis of gasoline-ranged i-paraffins. The authors employed aluminum isopropoxide as Al source during membrane synthesis and confirmed its beneficial impact with respect to the minimized coke deposition.…”

Section: Application As Catalytic Membranesmentioning

confidence: 99%

Zeolite Membranes in Catalysis—From Separate Units to Particle Coatings

Dragomirova

Wohlrab

2015

Catalysts

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Literature on zeolite membranes in catalytic reactions is reviewed and categorized according to membrane location. From this perspective, the classification is as follows: (i) membranes spatially decoupled from the reaction zone; (ii) packed bed membrane reactors; (iii) catalytic membrane reactors and (iv) zeolite capsuled catalyst particles. Each of the resulting four chapters is subdivided by the kind of reactions performed. Over the whole sum of references, the advantage of zeolite membranes in catalytic reactions in terms of conversion, selectivity or yield is evident. Furthermore, zeolite membrane preparation, separation principles as well as basic considerations on membrane reactors are discussed.

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“…It is generally accepted that the activity of Co catalysts for FT synthesis depends OPEN ACCESS on the presence of surface-exposed Co metal atoms [5,6], and therefore Co species should be both highly dispersed and reduced on the catalyst surface. For this reason, Co is generally deposited on high surface area supports such as SiO2 [7][8][9][10][11], Al2O3 [12,13] and TiO2 [14,15], in order to increase the quantity of active Co metal species. However, strong interactions between Co atoms and the support material can decrease both the reducibility and the activity of a Co catalyst [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…Our group is focused on the use of SiO2 as a catalyst support and has investigated the modification of this support using both metals and oxide additives. It is well known that the addition of Zr to a Co/SiO2 catalyst (Zr/Co/SiO2) increases the FT synthesis activity of the catalyst [9][10][11]. Furthermore, the addition of Mn to Zr/Co/SiO2 enhances the catalyst stability during the FT synthesis reaction [16].…”

Section: Introductionmentioning

confidence: 99%

Ruthenium Modification on Mn and Zr-Modified Co/SiO2 Catalysts for Slurry-Phase Fischer-Tropsch Synthesis

Miyazawa¹,

Hanaoka²,

Shimura³

et al. 2015

Catalysts

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Abstract:The addition of Ru to Mn and Zr-modified Co/SiO2 catalysts, while applying different preparation orders and loading amounts, was investigated as a means of enhancing the Fischer-Tropsch synthesis reaction. The coimpregnation of Zr/SiO2 with Co, Mn and Ru gave the most attractive catalytic properties. This can be attributed to the higher dispersion of Co metal resulting from the coimpregnation of Co and Mn as well as enhanced reducibility due to the presence of Ru. The addition of a moderate amount of Ru together with the appropriate order of addition affected both the Co reducibility and the catalytic activity, primarily because of increased reducibility. The addition of even 0.1 wt.% Ru resulted in an obvious enhancement of Fischer-Tropsch synthesis activity.

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Promotion of Co/SiO2 Fischer–Tropsch catalysts with zirconium

Cited by 87 publications

References 12 publications

Synthesis of mesoporous Co/Ce-SBA-15 materials and their catalytic performance in the catalytic oxidation of benzene

Synthesis of mesoporous Co/Ce-SBA-15 materials and their catalytic performance in the catalytic oxidation of benzene

Zeolite Membranes in Catalysis—From Separate Units to Particle Coatings

Ruthenium Modification on Mn and Zr-Modified Co/SiO2 Catalysts for Slurry-Phase Fischer-Tropsch Synthesis

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