Role of ZSM5 Distribution on Co/SiO2 Fischer–Tropsch Catalyst for the Production of C5–C22 Hydrocarbons

Kang, Suk-Hwan; Ryu, Jee-Youl; Kim, Jin-Ho; Jang, In Hyeok; Kim, A. Rong; Han, Gui Young; Bae, Jong Wook; Ha, Kwang

doi:10.1021/ef301251d

Cited by 33 publications

(29 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6, respectively. A typical reduction of silicasupported cobalt catalyst is commonly occurred in temperature range of 200-600 C [2,23,27,28]. The reduction is accomplished in two steps.…”

Section: Characteristics Of Supports and Catalystsmentioning

confidence: 99%

Improvement of Cobalt Dispersion on Co/SBA-15 and Co/SBA-16 Catalysts by Ultrasound and Vacuum Treatments during Post-Impregnation Step

Kruatim¹,

Jantasee²,

Jongsomjit³

2017

View full text Add to dashboard Cite

Abstract. The Co/SBA-15 and the Co/SBA-16 catalysts having 20 wt% of cobalt were prepared by the conventional impregnation method. Then, the post-impregnation treatments including vacuum and ultrasound treatments were applied. The synthesized catalysts were characterized by means of N2 physisorption, small angle X-ray diffraction (SAXRD), wide angle X-ray diffraction (XRD), scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM/EDX), transmission electron microscopy (TEM), and temperature-programmed reduction (TPR). The results show that the synthesized SBA-15 had hexagonal structure and the synthesized SBA-16 had the cubic structure. The vacuum and the ultrasound treatments after incipient wetness impregnation can apparently enhance the dispersion of cobalt on the SBA-15 catalysts due to the decrease of the metal crystallite size. However, only the vacuum treatment was suitable for the Co/SBA-16. After reduction, no cobalt-silicate compound was detected based on XRD measurement. Both postimpregnation treatments can also decrease the metal-support interaction resulting in increased activity for CO2 hydrogenation under methanation.

show abstract

“…6, respectively. A typical reduction of silicasupported cobalt catalyst is commonly occurred in temperature range of 200-600 C [2,23,27,28]. The reduction is accomplished in two steps.…”

Section: Characteristics Of Supports and Catalystsmentioning

confidence: 99%

Improvement of Cobalt Dispersion on Co/SBA-15 and Co/SBA-16 Catalysts by Ultrasound and Vacuum Treatments during Post-Impregnation Step

Kruatim¹,

Jantasee²,

Jongsomjit³

2017

View full text Add to dashboard Cite

show abstract

“…Some researchers tried to adjust Co catalyst for one-step synthesis of gasoline directly from syngas by coating the catalyst with zeolite membrane [6–8]. A compact zeolite membrane was formed at the outside of Co/SiO 2 pellets after a crystallization more than 24 h, but the zeolite membrane resulted in decreased CO conversion and increased CH 4 selectivity [6,7].…”

Section: Introductionmentioning

confidence: 99%

Effects of Weak Surface Modification on Co/SiO2 Catalyst for Fischer-Tropsch Reaction

et al. 2015

View full text Add to dashboard Cite

A weak surface modification is applied to Co/SiO2 catalyst by hydrothermal treatment at 180°C for 5 h. Aluminum is introduced to Co/SiO2 catalysts during the surface modification. The effects of surface modification on Co/SiO2 catalyst are studied by changing the operating sequences of surface modification and cobalt impregnation in the catalyst preparation. Surface modification before cobalt impregnation makes Co3O4 particle small and dispersed into the deep part of enlarged pore in SiO2, while surface modification after cobalt impregnation does not obviously change the particle size of Co3O4. The improved amplitude of catalytic activity is similar for the two kinds of catalysts, but they are benefited from different factors. The content of iso-hydrocarbons in the products is increased by the surface modifications.

show abstract

“…Until now, there are three kinds of bifunctional catalysts for direct synthesis of middle isoparaffin: physical mixture catalysts [12,13], zeolite-supported metal catalysts [14,15] and capsule or coated catalysts with the conventional FTS catalyst core and zeolite shell [16][17][18]. The physical mixture catalysts usually have a relatively low selectivity of middle isoparaffin due to its random hydrocracking/isomerization of long-chain hydrocarbons in acidic zeolite.…”

Section: Introductionmentioning

confidence: 99%

Tunable isoparaffin and olefin yields in Fischer–Tropsch synthesis achieved by a novel iron-based micro-capsule catalyst

et al. 2015

View full text Add to dashboard Cite

Please cite this article in press as: C. Xing, et al., Tunable isoparaffin and olefin yields in Fischer-Tropsch synthesis achieved by a novel iron-based micro-capsule catalyst, Catal. Today (2014), http://dx. a b s t r a c tA novel iron-based micro-capsule catalyst with interior Fe/Silica core and exterior H-ZSM-5 shell was synthesized via in-situ crystallization route on Fe/SBA-15 catalyst by using steam-assisted crystallization (SAC) process and evaluated for direct synthesis of middle isoparaffin from syngas in a fixed-bed reactor. Structure characterization indicated that the size of micro-capsule catalyst was about 1-2 m. According to activity test results, original Fe/SBA-15 catalyst exhibited a low selectivity of isoparaffin as 8.2%. But the as-prepared micro-capsule catalyst achieved an excellent performance for isoparaffin synthesis with the selectivity up to 46.5%. Meanwhile, the physical mixture catalyst (Fe/SBA-15 and H-ZSM-5) exhibited lower isoparaffin selectivity with 33.9% than that of the micro-capsule catalyst. The spatial confinement effect of the micro-capsule catalyst played an important role for the high selectivity of isoparaffin synthesis.

show abstract

Role of ZSM5 Distribution on Co/SiO₂ Fischer–Tropsch Catalyst for the Production of C₅–C₂₂ Hydrocarbons

Cited by 33 publications

References 27 publications

Improvement of Cobalt Dispersion on Co/SBA-15 and Co/SBA-16 Catalysts by Ultrasound and Vacuum Treatments during Post-Impregnation Step

Improvement of Cobalt Dispersion on Co/SBA-15 and Co/SBA-16 Catalysts by Ultrasound and Vacuum Treatments during Post-Impregnation Step

Effects of Weak Surface Modification on Co/SiO2 Catalyst for Fischer-Tropsch Reaction

Tunable isoparaffin and olefin yields in Fischer–Tropsch synthesis achieved by a novel iron-based micro-capsule catalyst

Contact Info

Product

Resources

About