Fe–Zn catalysts for the production of high-calorie synthetic natural gas

Lee, Yong Hee; Lee, Dae Won; Kim, Hyoungsik; Choi, Hyun Sook; Lee, Kwan Young

doi:10.1016/j.fuel.2015.06.076

Cited by 25 publications

(20 citation statements)

References 47 publications

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“…Ru promoter, one of the noble metals, provided the catalyst with hydrogen spillover ability, enhancing the reducibility of the cobalt site and CO conversion, but decreasing the C 2+ hydrocarbon yield. In addition, Ru promoters were substituted to save cost for the catalysts, and 20Co-16Mn/γ-Al 2 O 3 catalyst reduced at 700 • C for 1 h showed similar reactivity to 10Co-6Mn-2.5Ru/γ-Al 2 O 3 catalyst reduced at 400 • C for 1 h. The Fe-based bulk catalysts promoted by Cu and Zn showed high CO conversion and C 2 -C 4 yield, but low paraffin ratio and high byproduct yield (C 5+ and CO 2 ) [8,9]. On the other hand, the FT catalyst (5Co-15Fe/γ-Al 2 O 3 ) affords high CO conversion (99.7%), high light paraffinic hydrocarbon yield (31.2% CH 4 and 36.1% C 2 -C 4 ), and low byproduct formation (C 5+ and CO 2 ) under optimum conditions (SV: 4000 mL/g/h, T: 350 • C and P: 20 bar).…”

Section: Resultsmentioning

confidence: 85%

“…Table 3 shows the comparison of the 5Co-15Fe/γ-Al 2 O 3 catalyst under optimum conditions with different catalysts published in other papers. As listed in Table 3, Co-Mn-Ru catalysts showed high CO conversion and CH 4 yield, but relatively low C 2+ hydrocarbon yield, compared to Fe-based catalysts [7,8]. Lee et al [7] reported that Mn promoter in cobalt catalysts acted as a Lewis acid, which increased the carbon chain growth and C 2+ hydrocarbon yield, but suppressed CO conversion.…”

Section: Resultsmentioning

confidence: 99%

“…CH 4 via synthesis gas (syngas, CO + 3H 2 ) is an effective and environmentally friendly method, because it emits the smallest amount of CO 2 per energy unit among all fossil fuels. However, the heating value of CH 4 is typically below the standard heating value for power generation (especially in South Korea and Japan) [6][7][8][9][10][11][12]. For power generation, liquefied petroleum gas (LPG, C 3 -C 4 hydrocarbons) must be added to SNG to enhance its heating value; however, the price of LPG is strongly correlated with that of oil.…”

Section: Introductionmentioning

confidence: 99%

“…Lee et al elucidated the role of each component in the Co-based catalysts, and proposed the 10Co-6Mn-2.5Ru/Al 2 O 3 and 20Co-16Mn/Al 2 O 3 as optimum catalysts for high heating value of SNG [7]. They also developed Fe-Zn and Fe-Cu catalysts, and the Fe-based catalysts were evaluated after caburization and reduction pretreatment [8][9][10]. In an earlier report, bimetallic Co-Fe catalysts supported on γ-Al 2 O 3 were developed for the production of light hydrocarbons (C 2 -C 4 ranges) at high CO conversion [11].…”

Section: Introductionmentioning

confidence: 99%

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Selective CO Hydrogenation Over Bimetallic Co-Fe Catalysts for the Production of Light Paraffin Hydrocarbons (C2–C4): Effect of Space Velocity, Reaction Pressure and Temperature

Kim

Lee

et al. 2019

Catalysts

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Synthetic natural gas (SNG) using syngas from coal and biomass has attracted much attention as a potential substitute for fossil fuels because of environmental advantages. However, heating value of SNG is below the standard heating value for power generation (especially in South Korea and Japan). In this study, bimetallic Co-Fe catalyst was developed for the production of light paraffin hydrocarbons (C2–C4 as well as CH4) for usage as mixing gases to improve the heating value of SNG. The catalytic performance was monitored by varying space velocity, reaction pressure and temperature. The CO conversion increases with decrease in space velocities, and with an increase in reaction pressure and temperature. CH4 yield increases and C2+ yield decreases with increasing reaction temperature at all reaction pressure and space velocities. In addition, improved CH4 yield at higher reaction pressure (20 bar) implies that higher reaction pressure is a favorable condition for secondary CO2 methanation reaction. The bimetallic Co-Fe catalyst showed the best results with 99.7% CO conversion, 36.1% C2–C4 yield and 0.90 paraffin ratio at H2/CO of 3.0, space velocity of 4000 mL/g/h, reaction pressure of 20 bar, and temperature of 350 °C.

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Section: Resultsmentioning

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Selective CO Hydrogenation Over Bimetallic Co-Fe Catalysts for the Production of Light Paraffin Hydrocarbons (C2–C4): Effect of Space Velocity, Reaction Pressure and Temperature

Kim

Lee

et al. 2019

Catalysts

View full text Add to dashboard Cite

show abstract

“…Synthetic natural gas (SNG; CO + 3H 2 = CH 4 + H 2 O), produced from coal and biomass, has received considerable attention as a substitute for fossil fuels, because it mainly consists of CH 4 , which emits the smallest amount of CO 2 per energy unit among fossil fuels [1][2][3][4][5]. However, the heating value of SNG (9520 kcal/Nm 3 ) is lower than the standard heating value (10,400 kcal/Nm 3 ) for power generation in South Korea and Japan [6][7][8][9][10][11][12][13][14]. Consequently, liquefied petroleum gas (LPG; C 3 and C 4 ) must be added to increase the heating value of SNG.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Co–Fe–Al Catalysts for High-Calorific Synthetic Natural Gas Production: Pilot-Scale Synthesis of Catalysts

Kim

Woo

et al. 2021

Catalysts

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Co–Fe–Al catalysts prepared using coprecipitation at laboratory scale were investigated and extended to pilot scale for high-calorific synthetic natural gas. The Co–Fe–Al catalysts with different metal loadings were analyzed using BET, XRD, H2-TPR, and FT-IR. An increase in the metal loading of the Co–Fe–Al catalysts showed low spinel phase ratio, leading to an improvement in reducibility. Among the catalysts, 40CFAl catalyst prepared at laboratory scale afforded the highest C2–C4 hydrocarbon time yield, and this catalyst was successfully reproduced at the pilot scale. The pelletized catalyst prepared at pilot scale showed high CO conversion (87.6%), high light hydrocarbon selectivity (CH4 59.3% and C2–C4 18.8%), and low byproduct amounts (C5+: 4.1% and CO2: 17.8%) under optimum conditions (space velocity: 4000 mL/g/h, 350 °C, and 20 bar).

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Evaluation of novel ZnO–Ag cathode for CO2 electroreduction in solid oxide electrolyser

Biswas

Kulkarni

Seeber

et al. 2022

J Solid State Electrochem

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CO2 and steam/CO2 electroreduction to CO and methane in solid oxide electrolytic cells (SOEC) has gained major attention in the past few years. This work evaluates, for the very first time, the performance of two different ZnO–Ag cathodes: one where ZnO nanopowder was mixed with Ag powder for preparing the cathode ink (ZnOmix–Ag cathode) and the other one where Ag cathode was infiltrated with a zinc nitrate solution (ZnOinf –Ag cathode). ZnOmix–Ag cathode had a better distribution of ZnO particles throughout the cathode, resulting in almost double CO generation while electrolysing both dry CO2 and H2/CO2 (4:1 v/v). A maximum overall CO2 conversion of 48% (in H2/CO2) at 1.7 V and 700 °C clearly indicated that as low as 5 wt% zinc loading is capable of CO2 electroreduction. It was further revealed that for ZnOinf –Ag cathode, most of CO generation took place through RWGS reaction, but for ZnOmix–Ag cathode, it was the synergistic effect of both RWGS reaction and CO2 electrolysis. Although ZnOinf –Ag cathode produced trace amount of methane at higher voltages, with ZnOmix–Ag cathode, there was absolutely no methane. This seems to be due to strong electronic interaction between Zn and Ag that might have suppressed the catalytic activity of the cathode towards methanation.

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Fe–Zn catalysts for the production of high-calorie synthetic natural gas

Cited by 25 publications

References 47 publications

Selective CO Hydrogenation Over Bimetallic Co-Fe Catalysts for the Production of Light Paraffin Hydrocarbons (C2–C4): Effect of Space Velocity, Reaction Pressure and Temperature

Selective CO Hydrogenation Over Bimetallic Co-Fe Catalysts for the Production of Light Paraffin Hydrocarbons (C2–C4): Effect of Space Velocity, Reaction Pressure and Temperature

Investigation of Co–Fe–Al Catalysts for High-Calorific Synthetic Natural Gas Production: Pilot-Scale Synthesis of Catalysts

Evaluation of novel ZnO–Ag cathode for CO2 electroreduction in solid oxide electrolyser

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