Acidity modification of ZSM-5 for enhanced production of light olefins from CO2

Dokania, Abhay; Chowdhury, Abhishek Dutta; Ramírez, Adrián; Telalović, Selvedin; Abou-Hamad, Edy; Gevers, Lieven; Ruiz‐Martínez, Javier; Gascón, Jorge

doi:10.1016/j.jcat.2019.11.015

Cited by 61 publications

(52 citation statements)

References 58 publications

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“…Moreover, the reduced Brønsted acidity of CHA(Si/Al=30) also inhibits H‐transfer reactions (and consequently oligomerization) giving additional light olefins at the expense of longer chain hydrocarbons, thus increasing the selectivity towards olefins with respect to CHA(Si/Al=15), as has been recently proposed for ZSM‐5 (see Figure S11 for the analysis of coke formation on the used catalyst, c.a. 4 wt.%) [48] . Beside coke formation and blocking of acid sites in the zeolite, indium (III) cation migration during the reaction may exchange with the zeolite protons, further decreasing the acidity (see Figure S12).…”

Section: Resultsmentioning

confidence: 99%

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MOF‐derived/zeolite hybrid catalyst for the production of light olefins from CO₂

et al. 2020

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In this contribution we propose an alternative catalytic system based on MOF derivatives and small pore zeolites for the selective conversion of CO 2 into light olefins, using the lowest metal loadings and highest GHSV reported in literature. The catalyst synthesis involves deriving InÀ Zr oxides from MOFs containing these metals in their structure, i. e. (Zr)UiO-67-bipy-In, via direct calcination in the presence of the zeolite, avoiding co-precipitation, washing and mixing steps. This effectively creates a truly bifunctional InÀ Zr zeolite catalyst, opposed to physical mixtures of two catalysts using different precursors. The good dispersion and low loadings of the MOF-derived InÀ Zr oxide supplemented with the strong acidity of chabazitetype zeolites allows to couple the activation of CO 2 with CÀ C coupling, obtaining space time yields of 0.1 mol of CO 2 converted to light olefins per gram of In per hour at 375°C, under the GHSV conditions employed.

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Section: Resultsmentioning

confidence: 99%

“…4 wt.%). [48] Beside coke formation and blocking of acid sites in the zeolite, indium (III) cation migration during the reaction may exchange with the zeolite protons, further decreasing the acidity (see Figure S12). A similar catalyst behaviour is observed for the InÀ Zr/SSZ-39 sample with similar acidity (Si/Al ratio).…”

Section: Catalytic Propertiesmentioning

confidence: 99%

MOF‐derived/zeolite hybrid catalyst for the production of light olefins from CO₂

et al. 2020

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“…Instead, the general accepted trend lies on focusing on SAPO-34 or ZSM-5 and combining them with all possible mixed oxides of the periodic table to achieve higher selectivities/yields to these so-called fuels (that are also not characterized in terms or octane/cetane number). To try to unravel these complex reaction mechanisms, several groups have recently started to perform in-depth characterization via solid-state magic angle spinning Nuclear Magnetic Resonance (NMR) spectroscopy on the spent zeolites [54,55], as they are key components of the bifunctional systems. We have found that CO plays a key role in these bifunctional systems via formation of surface-carbonylated species on the zeolite framework (Figure 2).…”

Section: Trends and Limitations Of The Co2 Conversion To Fuelsmentioning

confidence: 99%

CO2 Derived E-Fuels: Research Trends, Misconceptions, and Future Directions

Ramírez

Sarathy

Gascón

2020

Trends in Chemistry

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CO2 neutral fuels (e-fuels) are considered to be a pragmatic and practical way of decreasing overall CO2 emissions derived from the transportation sector. However, for e-fuels to succeed and have a short-to-medium impact on climate mitigation, they should be fully compatible with existing fuel distribution infrastructure and vehicle technologies, such that they become literally drop-in replacements. In this short review, we first highlight the necessary properties that e-fuels should display to become a drop-in alternative to traditional petroleum derived fuels. With this information in hand, we revisit the current trends and limitations in the field of CO2 conversion to fuels, highlighting the many misconceptions that the scientific literature has created over the last few years. Finally, we share our view on future research strategies that may help realize the widespread implementation of e-fuel technology.

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“…Algunas de ellas son indirectas, pues emplean la adsorción-desorción de bases o ácidos sobre los sitios ácidos o básicos. Estas son las llamadas moléculas prueba, las cuales pueden estar combinadas con múltiples técnicas para el análisis y estudio de la acidez o basicidad de los sólidos como la espectroscopía infrarroja (IR) , Raman (Jin et al, 2017), la resonancia magnética nuclear (NMR) (Dokania et al, 2020), o los métodos de desorción a temperatura programada (TPD) (Halder et al, 2012).…”

Section: Estructura Geométrica De Diferentes óXidos Metálicosunclassified

Óxidos nanoestructurados de metales de transición con aplicaciones en catálsisis

Guaregua

Viniegra

Vargas

et al. 2020

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Se presenta un resumen de los factores que afectan de manera significativa a las propiedades catalíticas de los óxidos de metales de transición. Entre estos factores podemos mencionar el tamaño de partícula, su forma, su composición química, la interacción metal-soporte o la interacción catalizador-reactivo. Recientes investigaciones han demostrado que es posible controlar algunos de estos factores mediante una síntesis bien planeada y ejecutada, una caracterización profunda, y estudios teóricos de los catalizadores, que permitan conocer las estructuras electrónicas y geométricas del catalizador (como átomos simples, nanoaglomerados o nanopartículas) y correlacionarlas con su comportamiento en diferentes reacciones.

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Acidity modification of ZSM-5 for enhanced production of light olefins from CO2

Cited by 61 publications

References 58 publications

MOF‐derived/zeolite hybrid catalyst for the production of light olefins from CO₂

MOF‐derived/zeolite hybrid catalyst for the production of light olefins from CO₂

CO2 Derived E-Fuels: Research Trends, Misconceptions, and Future Directions

Óxidos nanoestructurados de metales de transición con aplicaciones en catálsisis

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Acidity modification of ZSM-5 for enhanced production of light olefins from CO2

Cited by 61 publications

References 58 publications

MOF‐derived/zeolite hybrid catalyst for the production of light olefins from CO2

MOF‐derived/zeolite hybrid catalyst for the production of light olefins from CO2

CO2 Derived E-Fuels: Research Trends, Misconceptions, and Future Directions

Óxidos nanoestructurados de metales de transición con aplicaciones en catálsisis

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Product

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MOF‐derived/zeolite hybrid catalyst for the production of light olefins from CO₂

MOF‐derived/zeolite hybrid catalyst for the production of light olefins from CO₂