Pore size effects on physicochemical properties of Fe-Co/K-Al2O3 catalysts and their catalytic activity in CO2 hydrogenation to light olefins

Numpilai, Thanapha; Chanlek, Narong; Poo‐arporn, Yingyot; Wannapaiboon, Suttipong; Cheng, Chin Kui; Siri-Nguan, Nuchanart; Sornchamni, Thana; Kongkachuichay, Paisan; Chareonpanich, Metta; Rupprechter, Günther; Limtrakul, Jumras; Witoon, Thongthai

doi:10.1016/j.apsusc.2019.03.331

Cited by 76 publications

(44 citation statements)

References 52 publications

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“…The former component of this composite is a methanol synthesis catalyst, whereas the latter is a methanol-to-olefins catalyst. The influence of the physicochemical properties of Fe-Co/K-Al 2 O 3 catalysts on their activity and selectivity towards olefin formation was investigated by Numpilai et al [107]. In good agreement with a study by Gupta et al [103], it was found that the formation of long-chain hydrocarbons was easier in the catalysts with large pores.…”

Section: Tandem Catalytic Systemssupporting

confidence: 55%

“…In good agreement with a study by Gupta et al [103], it was found that the formation of long-chain hydrocarbons was easier in the catalysts with large pores. The best olefin yield was obtained for the catalyst with a pore size of 49.7 nm [107]. Catalysts with a smaller pore size exhibit confinement effect: small crystallites of the Fe 2 O 3 phase were formed inside small pores.…”

Section: Tandem Catalytic Systemsmentioning

confidence: 99%

“…This is because of its favorable framework structure with a CHA cage (9.4 Å) and mild acidity, allowing the optimum intracrystalline diffusion path length and the optimum mild acidity [103]. By controlling the catalyst synthesis conditions, the yield of light olefins and the catalyst lifetime can be improved [104][105][106][107][108]. In this regard, the catalyst with a core-shell structure with an iron core and a cobalt shell proved to be effective for olefin formation due to a cooperative effect between the two metals and shape selectivity.…”

Section: Tandem Catalytic Systemsmentioning

confidence: 99%

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Catalysts for the Conversion of CO2 to Low Molecular Weight Olefins—A Review

et al. 2021

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There is a large worldwide demand for light olefins (C2=–C4=), which are needed for the production of high value-added chemicals and plastics. Light olefins can be produced by petroleum processing, direct/indirect conversion of synthesis gas (CO + H2) and hydrogenation of CO2. Among these methods, catalytic hydrogenation of CO2 is the most recently studied because it could contribute to alleviating CO2 emissions into the atmosphere. However, due to thermodynamic reasons, the design of catalysts for the selective production of light olefins from CO2 presents different challenges. In this regard, the recent progress in the synthesis of nanomaterials with well-controlled morphologies and active phase dispersion has opened new perspectives for the production of light olefins. In this review, recent advances in catalyst design are presented, with emphasis on catalysts operating through the modified Fischer–Tropsch pathway. The advantages and disadvantages of olefin production from CO2 via CO or methanol-mediated reaction routes were analyzed, as well as the prospects for the design of a single catalyst for direct olefin production. Conclusions were drawn on the prospect of a new catalyst design for the production of light olefins from CO2.

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Section: Tandem Catalytic Systemssupporting

confidence: 55%

Section: Tandem Catalytic Systemsmentioning

confidence: 99%

Section: Tandem Catalytic Systemsmentioning

confidence: 99%

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Catalysts for the Conversion of CO2 to Low Molecular Weight Olefins—A Review

et al. 2021

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“…Lastly, if we compare the data reported herein with the state‐of‐the‐art iron‐based catalysts reported for this application (Table S4), we find that red mud outperforms most of them and only our recent Fe‐MOF‐mediated catalyst displays a higher space–time yield into olefins (31.8 vs. 16.6 mmol

_{normalC_{2} - normalC_{4} =}

g cat −1 h −1 ). Furthermore, we compared the red mud sample with commercially available iron(III) oxide (see Experimental Section and Table S5).…”

Section: Resultsmentioning

confidence: 70%

Turning Waste into Value: Potassium‐Promoted Red Mud as an Effective Catalyst for the Hydrogenation of CO₂

et al. 2020

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Figure 4. Characterization of red mud and red mud promoted with 2wt% of Ka fter reaction at 350 8C, 30 bar,and 50 hT OS:a)XRD results of iron-containing phaseso fsamples beforeand after catalytic reaction (PDF 01-089-0596, PDF 04-012-7038,a nd PDF 04-014-4562 diffractogramsw ere used for hematite, magnetite,a nd iron carbidep hases, respectively). b) 308-508 2q region of samples before and after catalytic reaction. c) XPS analysis results of samples before and after catalyticreaction.

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“…All catalysts exhibited the typical spectra for Fe 2 O 3 with a satellite peak at 718.5–719.3 eV, so the iron species in the catalysts mainly existed as Fe 2 O 3 . [ 51 ] In addition, Fe 2p 3/2 can be divided into three peaks with the binding energy of 710.3, 711.4, and 713.1 eV, and the ratios of the Fe 2+ and Fe 3+ calculated by Fe 2p 3/2 peak areas are listed in Table 2. The value of Fe 2+ /Fe 3+ in the octahedral structure decreased with the addition of K, demonstrating that the reducibility of catalysts was correspondingly reduced, which is consistent with the increased reduction temperature in H 2 ‐TPR.…”

Section: Resultsmentioning

confidence: 99%

CO₂ hydrogenation to C₅₊ hydrocarbons over K‐promoted Fe/CNT catalyst: Effect of potassium on structure–activity relationship

Dai

Chen

Liu

et al. 2021

Applied Organom Chemis

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Developing efficient catalysts for direct CO2 hydrogenation to fuel hydrocarbons is of great significance for the effective utilization of CO2, and C5+ selectivity is one critical indicator for the process economics. In this work, a series of K‐promoted Fe/CNT catalysts were prepared by the co‐impregnation method, and their catalytic performance for CO2 hydrogenation was studied in a slurry‐bed reactor. As a result, CO2 conversion and C5+ selectivity showed positive correlation with the increase of K/Fe ratio from 0 to 0.3, but further increase of K/Fe ratio above 0.3 slightly affected its. The catalyst with a K/Fe molar ratio of 0.3 achieved the best performance with CO2 conversion of 23.7% and C5+ selectivity of 56%. In addition, the structure–activity relationship of the catalyst was discussed based on various characterization results. K‐modified catalysts presented a higher specific surface area and stronger CO2 chemisorption, which helped to improve CO2 conversion and C5+ selectivity. However, excessive potassium loading caused a loss of specific surface area, reduction degree, and graphitization degree of the catalyst, which inhibited the CO2 chemisorption and the formation of C5+ hydrocarbons.

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Pore size effects on physicochemical properties of Fe-Co/K-Al2O3 catalysts and their catalytic activity in CO2 hydrogenation to light olefins

Cited by 76 publications

References 52 publications

Catalysts for the Conversion of CO2 to Low Molecular Weight Olefins—A Review

Catalysts for the Conversion of CO2 to Low Molecular Weight Olefins—A Review

Turning Waste into Value: Potassium‐Promoted Red Mud as an Effective Catalyst for the Hydrogenation of CO₂

CO₂ hydrogenation to C₅₊ hydrocarbons over K‐promoted Fe/CNT catalyst: Effect of potassium on structure–activity relationship

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Pore size effects on physicochemical properties of Fe-Co/K-Al2O3 catalysts and their catalytic activity in CO2 hydrogenation to light olefins

Cited by 76 publications

References 52 publications

Catalysts for the Conversion of CO2 to Low Molecular Weight Olefins—A Review

Catalysts for the Conversion of CO2 to Low Molecular Weight Olefins—A Review

Turning Waste into Value: Potassium‐Promoted Red Mud as an Effective Catalyst for the Hydrogenation of CO2

CO2 hydrogenation to C5+ hydrocarbons over K‐promoted Fe/CNT catalyst: Effect of potassium on structure–activity relationship

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Product

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Turning Waste into Value: Potassium‐Promoted Red Mud as an Effective Catalyst for the Hydrogenation of CO₂

CO₂ hydrogenation to C₅₊ hydrocarbons over K‐promoted Fe/CNT catalyst: Effect of potassium on structure–activity relationship