Al‐SBA‐16‐Supported Cobalt Catalysts for the Fischer–Tropsch Production of Gasoline‐Fraction Hydrocarbons

Zhao, Ye; Li, Jinlin; Zhang, Yuhua; Chen, Shu-Fang; Liew, Kongyong

doi:10.1002/cctc.201200394

Cited by 19 publications

(16 citation statements)

References 23 publications

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“…SBA-16 showed a type IV isotherm pattern with an H2 hysteresis loop, whereas KIT-6 and SBA-15 had type IV isotherms with an H1 hysteresis loop. These results indicated that SBA-16 has cagelike mesopores [41], KIT-6 has cubic mesopores [42], and SBA-15 has cylindrical mesopores [43]. Thus, each sample has a unique porous structure.…”

Section: Characterization Of Cobalt Catalysts Supported On Mcf Sba-1mentioning

confidence: 83%

Fischer–Tropsch synthesis over a 3D foamed MCF silica support: Toward a more open porous network of cobalt catalysts

Liang

Zhao

Zhang

et al. 2016

Journal of Catalysis

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a b s t r a c tThree-dimensional mesoporous cellular silica foams (MCFs) were prepared and used as supports for cobalt Fischer-Tropsch synthesis (FTS) catalysts (Co/MCF). The silica foam MCFs have a 3D mesostructure with large spherical cell pores interconnected with small window pores, which provides an open porous network for Co FTS catalysts. The effects of catalyst structure parameters (cell pore diameter and cobalt particle size) on the performance of the Co/MCF catalysts were investigated. It was found that the Co/MCF catalyst with average pore size 7-12 nm (window and cell pores) showed the highest reactivity. The MCF not only provided a cavity to suppress the growth of cobalt particles, but also enhanced the reducibility and cobalt dispersion. The Co/MCF catalysts having a large and open pore structure are favorable for the transport of reactants and the occurrence of secondary reactions, leading to high C 5+ hydrocarbon selectivity. A Co/MCF catalyst with Co particle size 6.9 nm presented the highest activity in the FTS reaction due to its having the highest dispersion and an appropriate degree of reduction. Compared with the Co catalysts supported on other ordered silicas (SBA-16, KIT-6, and SBA-15), the Co/MCF catalyst showed higher activity and C 5+ hydrocarbon selectivity, which was attributed to the 3D open porous structure of MCF. The Co/MCF catalysts are stable under low-temperature FTS conditions (210°C). Under harsh FTS reaction conditions (250°C, 1.0 MPa), the Co/MCF catalyst underwent rapid deactivation due to cobalt sintering and the formation of interacting Co-silica compound, while the stability of the Co/MCF catalyst can be improved by functionalizing the MCF using carbon coating and Al doping.

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Section: Characterization Of Cobalt Catalysts Supported On Mcf Sba-1mentioning

confidence: 83%

Fischer–Tropsch synthesis over a 3D foamed MCF silica support: Toward a more open porous network of cobalt catalysts

Liang

Zhao

Zhang

et al. 2016

Journal of Catalysis

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“…[93] The selectivity to C 5 -C 12 increased to about 60 % over the Co/Al-SBA-16 (Co content = 15 wt %) catalyst with a Si/Al ratio of 10, whereas it was < 40 % over Co/SBA-16 under the following reaction conditions: T = 493 K, P = 1.0 MPa, H 2 /CO = 2. For examples, Li and co-workers found that the incorporation of aluminum into the framework of SBA-16, which is a mesoporous silica with a cage-like structure, enhanced the acidity and changed the product selectivity of the supported cobalt catalysts.…”

Section: Cnts With Acid Functional Groups and Other Solid-acidbased Bmentioning

confidence: 95%

“…For examples, Li and co-workers found that the incorporation of aluminum into the framework of SBA-16, which is a mesoporous silica with a cage-like structure, enhanced the acidity and changed the product selectivity of the supported cobalt catalysts. [93] The selectivity to C 5 -C 12 increased to about 60 % over the Co/Al-SBA-16 (Co content = 15 wt %) catalyst with a Si/Al ratio of 10, whereas it was < 40 % over Co/SBA-16 under the following reaction conditions: T = 493 K, P = 1.0 MPa, H 2 /CO = 2. At the same time, the selectivity to C 13 + hydrocarbons decreased from about 40 % for the Co/SBA-16 catalyst to about 15 % for the Co/Al-SBA-16 catalyst.…”

Section: Cnts With Acid Functional Groups and Other Solid-acidbased Bmentioning

confidence: 95%

Fischer–Tropsch Catalysts for the Production of Hydrocarbon Fuels with High Selectivity

Zhang¹,

Cheng²,

Kang³

et al. 2013

ChemSusChem

179

123

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Fischer-Tropsch synthesis is a key reaction in the utilization of non-petroleum carbon resources, such as methane (natural gas, shale gas, and biogas), coal, and biomass, for the sustainable production of clean liquid fuels from synthesis gas. Selectivity control is one of the biggest challenges in Fischer-Tropsch synthesis. This Minireview focuses on the development of new catalysts with controllable product selectivities. Recent attempts to increase the selectivity to C5+ hydrocarbons by preparing catalysts with well-defined active phases or with new supports or by optimizing the interaction between the promoter and the active phase are briefly highlighted. Advances in developing bifunctional catalysts capable of catalyzing both CO hydrogenation to heavier hydrocarbons and hydrocracking/isomerization of heavier hydrocarbons are critically reviewed. It is demonstrated that the control of the secondary hydrocracking reactions by using core-shell nanostructures or solid-acid materials, such as mesoporous zeolites and carbon nanotubes with acid functional groups, is an effective strategy to tune the product selectivity of Fischer-Tropsch synthesis. Very promising selectivities to gasoline- and diesel-range hydrocarbons have been attained over some bifunctional catalysts.

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“…For 4Ru(1.0) catalyst, the selectivity of C 5 -C 12 reaches 40.9%, which might be ascribed to the interception of the primary α-olefin that is formed on the FTS active sites by the nearby acid sites on the supports. 35 Kodadek et al 36 also reported that the acidity of the catalyst led to olefin isomerization, lower chain growth probability, and higher selectivity of lighter hydrocarbons. The higher CH 4 selectivity on Ru catalysts with more acid sites is caused by the hydrogen spillover from metal to the support at high reaction temperature (250 °C), which results in the higher partial pressure of hydrogen on the active sites and leads to the formation of more CH 4 6 .…”

Section: Catalysis Science and Technology Papermentioning

confidence: 99%

Ru catalysts supported on Al–SBA-15 with high aluminum content and their bifunctional catalytic performance in Fischer–Tropsch synthesis

Chen

Zhang

et al. 2014

Catal. Sci. Technol.

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Al‐SBA‐16‐Supported Cobalt Catalysts for the Fischer–Tropsch Production of Gasoline‐Fraction Hydrocarbons

Cited by 19 publications

References 23 publications

Fischer–Tropsch synthesis over a 3D foamed MCF silica support: Toward a more open porous network of cobalt catalysts

Fischer–Tropsch synthesis over a 3D foamed MCF silica support: Toward a more open porous network of cobalt catalysts

Fischer–Tropsch Catalysts for the Production of Hydrocarbon Fuels with High Selectivity

Ru catalysts supported on Al–SBA-15 with high aluminum content and their bifunctional catalytic performance in Fischer–Tropsch synthesis

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