Selective direct conversion of aqueous ethanol into butadiene <i>via</i> rational design of multifunctional catalysts

Wang, Kangzhou; Peng, Xiaobo; Wang, Chengwei; Gao, Wan-Yang; Liu, Na; Guo, Xiaoyu; He, Yingluo; Yang, Guohui; Jiang, Lilong; Tsubaki, Noritatsu

doi:10.1039/d1cy02149d

Cited by 14 publications

(8 citation statements)

References 65 publications

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Section: Resultsmentioning

confidence: 92%

“…With increasing fraction of Mn, the peak intensity of cubic Fe 3 O 4 declined compared to pure Fe 3 O 4 . Meanwhile, no characteristic diffraction peaks of Mn species were observed in the 10Fe-Mn and 5Fe-Mn catalysts due to uniform dispersion of Mn species on Fe 3 O 4 and/or particle size less than the detection limit of XRD [32]. In Fe 3 O 4 /MAG, 5Fe-Mn/MAG, and 10Fe-Mn/MAG catalysts, indicating that Fe 3 O 4 and Mn species had no significant effect on the structure of the MAG support [22].…”

Section: Structural Propertiesmentioning

confidence: 97%

“…Manganese is considered to be a promising promoter for Fe-based catalysts [24,25], because Mn promoter could suppress the chain growth and deep hydrogenation of generated primary olefins [26]. Besides, Mn, as an electronic and structural promoter, could improve dissociative CO adsorption and catalyst stability [27][28][29][30][31][32]. Therefore, MAG-supported Mn-modified Fe 3 O 4 catalysts, fabricated by combining solvothermal and ethanol dispersion methods, are feasible for highly efficient conversion of syngas to HVOs with high O/P ratio and low CH 4 selectivity.…”

Section: Introductionmentioning

confidence: 99%

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Highly Efficient Synthesis of High‐Value Olefins from Syngas over Layered Fe‐Mn/Magadiite Catalyst

et al. 2023

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The simultaneous realization of high olefin/paraffin (O/P) ratio and low CH4 selectivity has always been a bottleneck for the conversion of syngas to high‐value olefins (HVOs). Magadiite (MAG) is a layered silicate material with active SiOH, which increases the interlayer charge density and ion‐exchange ability. Herein, a MAG‐supported, Mn‐modified Fe3O4 microsphere catalyst exhibits excellent CO conversion of 76.5 % and HVO selectivity, with a high O/P ratio of 5.02 and low CH4 selectivity of 16.1 % for conversion of syngas to HVOs. The layered structure of the MAG support promotes dispersion of the active centers and the Mn promoter improves the basic properties of the catalyst. Moreover, the Mn promoter and MAG support have a synergistic effect, which promotes CO dissociation and suppresses H2 adsorption, thereby resulting in high HVO selectivity and low CH4 selectivity.

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Section: Resultsmentioning

confidence: 92%

Section: Structural Propertiesmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Highly Efficient Synthesis of High‐Value Olefins from Syngas over Layered Fe‐Mn/Magadiite Catalyst

et al. 2023

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“…From the characterization of the catalysts and the reaction performance results, we can infer that the acid–base properties of catalysts have an important influence on the catalytic performance of the direct ETB conversion [ 26 , 41 ]. A relationship between the acid–base properties of the catalyst and the catalytic performance was established to maximize the production of butadiene from ethanol.…”

Section: Resultsmentioning

confidence: 99%

Tuning the Acid–Base Properties of Lignin-Derived Carbon Modulated ZnZr/SiO2 Catalysts for Selective and Efficient Production of Butadiene from Ethanol

Liu,

He,

Wang

et al. 2023

Molecules

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The direct selective conversion of ethanol to butadiene (ETB) is a competitive and environmentally friendly process compared to the traditional crude cracking route. The acid–base properties of catalysts are crucial for the direct ETB process. Herein, we report a rationally designed multifunctional lignin-derived carbon-modulated ZnZr/SiO2 (L-ZnZr/SiO2) catalyst with suitable acid–base properties for the direct ETB reaction. A variety of characterization techniques are employed to investigate the relationship between the acid–base properties and catalytic performance of the multifunctional lignin-modulated ZnZr/SiO2 catalysts. The results revealed that the rationally additional lignin-modulated carbon enhances both the acidity and basicity of the ZnZr/SiO2 catalysts, providing a suitable acid–base ratio that boosts the direct ETB reactivity. Meanwhile, the 1% L-ZnZr/SiO2 catalyst possessed ethanol conversion and butadiene selectivity as high as 98.4% and 55.5%, respectively, and exhibited excellent catalytic stability.

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“…According to thermodynamic calculations, the equilibrium conversion of CO 2 was 60%, but currently reported CO 2 conversion rates are 30–50%. This was due to the fact that the H 2 O produced during the RWGS reaction inhibited the activation of CO 2 and the properties of FeC x , thus reducing the CO 2 conversion . Guo et al used a multistage reactor for the removal of H 2 O from the reaction system and achieved some results, and the Fe catalyst of the multistage reactor system achieved a CO 2 conversion rate of 69.9%.…”

Section: Fe-based Catalystsmentioning

confidence: 99%

Recent Advances Hydrogenation of Carbon Dioxide to Light Olefins over Iron-Based Catalysts via the Fischer–Tropsch Synthesis

Liu,

Zhang,

Peng

2024

ACS Omega

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The massive burning of fossil fuels has been important for economic and social development, but the increase in the CO 2 concentration has seriously affected environmental sustainability. In industrial and agricultural production, light olefins are one of the most important feedstocks. Therefore, the preparation of light olefins by CO 2 hydrogenation has been intensively studied, especially for the development of efficient catalysts and for the application in industrial production. Fe-based catalysts are widely used in Fischer−Tropsch synthesis due to their high stability and activity, and they also exhibit excellent catalytic CO 2 hydrogenation to light olefins. This paper systematically summarizes and analyzes the reaction mechanism of Fe-based catalysts, alkali and transition metal modifications, interactions between active sites and carriers, the synthesis process, and the effect of the byproduct H 2 O on catalyst performance. Meanwhile, the challenges to the development of CO 2 hydrogenation for light olefin synthesis are presented, and future development opportunities are envisioned.

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Selective direct conversion of aqueous ethanol into butadiene via rational design of multifunctional catalysts

Abstract: Research on multifunctional catalysts for direct transformation of high-purity ethanol to butadiene has made some progress. However, the direct conversion of aqueous ethanol to butadiene (AETB) with high activity and...

Cited by 14 publications

References 65 publications

Highly Efficient Synthesis of High‐Value Olefins from Syngas over Layered Fe‐Mn/Magadiite Catalyst

Highly Efficient Synthesis of High‐Value Olefins from Syngas over Layered Fe‐Mn/Magadiite Catalyst

Tuning the Acid–Base Properties of Lignin-Derived Carbon Modulated ZnZr/SiO2 Catalysts for Selective and Efficient Production of Butadiene from Ethanol

Recent Advances Hydrogenation of Carbon Dioxide to Light Olefins over Iron-Based Catalysts via the Fischer–Tropsch Synthesis

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