Methanation of CO2 on bulk Co–Fe catalysts

Fe-Ni and Co-Fe-Ni catalysts were prepared by the wet impregnation method for the production of high-calorific synthetic natural gas. The influence of Ni addition to Fe and Co-Fe catalyst structure and catalytic performance was investigated. The results show that the increasing of Ni amount in Fe-Ni and Co-Fe-Ni catalysts increased the formation of Ni-Fe alloy. In addition, the addition of nickel to the Fe and Co-Fe catalysts could promote the dispersion of metal and decrease the reduction temperature. Consequently, the Fe-Ni and Co-Fe-Ni catalysts exhibited higher CO conversion compared to Fe and Co-Fe catalysts. A higher Ni amount in the catalysts could increase C1–C4 hydrocarbon production and reduce the byproducts (C5+ and CO2). Among the catalysts, the 5Co-15Fe-5Ni/γ-Al2O3 catalyst affords a high light hydrocarbon yield (51.7% CH4 and 21.8% C2–C4) with a low byproduct yield (14.1% C5+ and 12.1% CO2).

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Hydrodeoxygenation of guaiacol over BEA supported bimetallic Ni-Fe catalysts with varied impregnation sequence

Journal of Catalysis ◽

10.1016/j.jcat.2021.08.033 ◽

2021 ◽

Vol 404 ◽

pp. 1-11

Author(s):

Penghui Yan ◽

Eric Kennedy ◽

Michael Stockenhuber

Keyword(s):

Fe Catalysts

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CO2 hydrogenation into CH4 over Ni–Fe catalysts

Functional Materials Letters ◽

10.1142/s1793604718500571 ◽

2018 ◽

Vol 11 (03) ◽

pp. 1850057 ◽

Cited By ~ 8

Author(s):

Reza Meshkini Far ◽

Olena V. Ischenko ◽

Alla G. Dyachenko ◽

Oleksandr Bieda ◽

Snezhana V. Gaidai ◽

...

Keyword(s):

Low Temperature ◽

Synergistic Effect ◽

Atmospheric Pressure ◽

High Efficiency ◽

Co2 Hydrogenation ◽

Hydrogenation Catalysts ◽

Fe Catalysts ◽

First Time ◽

Supported Ni ◽

Hydrogenation Of Co

Here, we report, for the first time, on the catalytic hydrogenation of CO2 to methane at atmospheric pressure. For the preparation of hydrogenation catalysts based on Ni and Fe metals, a convenient method is developed. According to this method, low-temperature reduction of the co-precipitated Ni and Fe oxides with hydrogen gives the effective and selective bimetallic Ni[Formula: see text]Fe[Formula: see text], Ni[Formula: see text]Fe[Formula: see text] and Ni[Formula: see text]Fe[Formula: see text] catalysts. At the temperature range of 300–400[Formula: see text]C, they exhibit a high efficiency of CH4 production with respect to monometallic Ni and Fe catalysts. The results imply a synergistic effect between Ni and Fe which caused the superior activity of the Ni[Formula: see text]Fe[Formula: see text] catalyst conversing [Formula: see text]% of CO2 into CH4 at 350[Formula: see text]C. To adapt the Ni–Fe catalysts in the industry, the effect of two different carriers on the efficiency of the alumina-supported Ni[Formula: see text]Fe[Formula: see text] catalyst was investigated. It is found that the Ni[Formula: see text]Fe[Formula: see text]/[Formula: see text]-Al2O3 catalyst effectively conversed CO2 giving 100% methane yield already at 275[Formula: see text]C.

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Perspective on Steam Reforming of Toluene Over Mineral Supported Ni-Fe Catalysts: Essential Roles of Different Structures

SSRN Electronic Journal ◽

10.2139/ssrn.3950213 ◽

2021 ◽

Author(s):

Yinsheng Zhang ◽

Xuehua Zou ◽

Haibo Liu ◽

Ye Chen ◽

Shiwei Dong ◽

...

Keyword(s):

Steam Reforming ◽

Fe Catalysts ◽

Steam Reforming Of Toluene ◽

Supported Ni

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Zn and Na promoted Fe catalysts for sustainable production of high-valued olefins by CO2 hydrogenation

Fuel ◽

10.1016/j.fuel.2021.122105 ◽

2022 ◽

Vol 309 ◽

pp. 122105

Author(s):

Zhiqiang Zhang ◽

Gongxun Huang ◽

Xinglei Tang ◽

Haoren Yin ◽

Jincan Kang ◽

...

Keyword(s):

Co2 Hydrogenation ◽

Sustainable Production ◽

Fe Catalysts

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The Selective Oxidation of Hydrocarbons on Isolated Iron Active Sites under Ambient Conditions

Journal of the chemical society of pakistan ◽

10.52568/000816/jcsp/41.06.2019 ◽

2019 ◽

Vol 41 (6) ◽

pp. 946-946

Author(s):

Zhengliang Qi Zhengliang Qi ◽

Junmei Liu Junmei Liu ◽

Wanwan Guo and Jun Huang Wanwan Guo and Jun Huang

Keyword(s):

Ionic Liquid ◽

Activated Carbon ◽

Carbon Material ◽

Active Sites ◽

High Selectivity ◽

Good Activity ◽

Ambient Conditions ◽

Oxidation Of Hydrocarbons ◽

Fe Catalysts ◽

Iron Active Sites

The N-doped carbon material supported Fe catalysts were developed for the oxidation of C-H bond of hydrocarbons to ketones and alcohols. The supported Fe catalysts were prepared by pyrolysis of [CMIM]3Fe(CN)6 ionic liquid in activated carbon. And the Fe(Ⅲ)@CN-600 showed good activity and high selectivity for the oxidation of alfa C-H bond of alkylbenzenes. The isolated Fe(Ⅲ) iron active sites should be responsible for the high activity and selectivity for the oxidation of hydrocarbons to ketones. Several ketones were obtained in good to excellent yields. Moreover, cyclohexanone can also be obtained through the oxidation of cyclohexane.

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Modulation of carbon nanotube yield and type through the collective effects of initially deposited catalyst amount and MgO underlayer annealing temperature

MRS Advances ◽

10.1557/adv.2018.624 ◽

2018 ◽

Vol 4 (3-4) ◽

pp. 139-146

Author(s):

Takashi Tsuji ◽

Guohai Chen ◽

Kenji Hata ◽

Don N. Futaba ◽

Shunsuke Sakurai

Keyword(s):

Carbon Nanotube ◽

Annealing Temperature ◽

Catalyst Surface ◽

Catalyst System ◽

Forest Growth ◽

Collective Effects ◽

High Yield ◽

Force Microscopy ◽

Atomic Force ◽

Fe Catalysts

ABSTRACTRecently, the millimetre-scale, highly efficient growth of single-wall carbon nanotube (SWCNT) forests from iron (Fe) catalysts has been reported through the annealing of the magnesia (MgO) underlayer. Here, we report the modulation of the CNT yield (height) and average number of CNT walls for a Fe/MgO catalyst system through the collective effects of initial Fe amount and MgO annealing temperature. Our results revealed the existence of a well-defined region for high yield SWCNT forest growth in the domain of deposited Fe thickness and MgO annealing temperature. Through topographic examinations of the catalyst surface using atomic force microscopy, we confirmed that our results stem from the collective effects of increased amounts of surface-bound Fe through the amount of deposition and suppression of Fe subsurface diffusion, together govern the amount of surface-bound catalyst. The combination of these mechanisms determined the final nanoparticle size, density, and stability and could explain the three distinctly defined regions: low yield SWCNT growth, high yield SWCNT growth, and high yield multiwall CNT growth. Furthermore, we explained the observed borders between these three regions.

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