Selective production of aromatics from CO<sub>2</sub>

Xu, Yuebing; Shi, Chengming; Liu, Bing; Wang, Ting; Zheng, Jiao; Li, Wenping; Liu, Dapeng

doi:10.1039/c8cy02024h

Cited by 122 publications

(80 citation statements)

References 61 publications

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“…Moreover, for the spent catalysts after CO 2 hydrogenation for 48 h, the amount of coke decreases with the reduced crystal size of the zeolites, and acid‐treated SAPO‐34 zeolites exhibit lower amounts of coke (Figure S7 a–c in the Supporting Information), indicating that the smaller crystal size and/or the meso‐/macropore structure favor diffusion of the coke precursor. As a result of the coke, the BET surface area and pore volume of the zeolite decrease significantly after reaction . As shown in the results of the N 2 physisorption experiment (Figure S8 and Table S5 in the Supporting Information), the pore structures of thermally regenerated SAPO‐34‐C and SAPO‐34‐H‐a samples are similar to that of the fresh zeolite even after reaction for 92 h. A large amount of water is formed during CO 2 hydrogenation, which may destroy the structure of the SAPO‐34 zeolite.…”

Section: Resultsmentioning

confidence: 94%

Selective Transformation of CO₂ and H₂ into Lower Olefins over In₂O₃‐ZnZrO_x/SAPO‐34 Bifunctional Catalysts

et al. 2019

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Because lower olefins (C2=–C4=) are important bulk petrochemicals, their direct production from CO2 hydrogenation is highly attractive. However, the selectivity towards C2=–C4= by the modified Fischer–Tropsch synthesis is restricted to 56.7 % with high undesired methane selectivity. Here, a series of bifunctional catalysts containing In2O3‐ZnZrOx oxides and various SAPO‐34 zeolites with different crystal sizes (0.4–1.5 μm) and pore structures was developed for the production of lower olefins by CO2 hydrogenation. The C2=–C4= selectivity reached as high as 85 % among all hydrocarbons with very low CH4 selectivity of only 1 % at a CO2 conversion of 17 %. This demonstrated that the small crystal size, hierarchical pore structure, and appropriate amount of Brønsted acid sites of SAPO‐34 endowed the bifunctional catalysts with high C2=–C4= selectivity. This work shows an efficient way for developing bifunctional catalysts for direct CO2 hydrogenation to lower olefins.

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Section: Resultsmentioning

confidence: 94%

Selective Transformation of CO₂ and H₂ into Lower Olefins over In₂O₃‐ZnZrO_x/SAPO‐34 Bifunctional Catalysts

et al. 2019

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“…Moreover, the isoparaffin/aromatic ratio in C 5–11 hydrocarbons over this bifunctional catalyst system containing Fe-based oxides and zeolites can be tuned by regulating the types, structures, and properties of zeolites. 105 , 108 HMCM-22 zeolite with a unique pore network and appropriate Brønsted acid density and strength enables the formation of branched hydrocarbons with superior selectivity ( Figure 2 C, ∼35% in all hydrocarbons). 109 Recent studies also demonstrate that Na-ZnFeO x /HZSM-5 comprised of Na modified ZnFeO x and hierarchical nanocrystalline HZSM-5 aggregated with an appropriate density of Brønsted acid sites can realize the highly efficient synthesis of aromatics from CO 2 hydrogenation ( Figure 2 D).…”

Section: Co 2 Hydrogenation To Liquid Hydrocarbonsmentioning

confidence: 99%

Novel Heterogeneous Catalysts for CO₂ Hydrogenation to Liquid Fuels

et al. 2020

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Carbon dioxide (CO 2 ) hydrogenation to liquid fuels including gasoline, jet fuel, diesel, methanol, ethanol, and other higher alcohols via heterogeneous catalysis, using renewable energy, not only effectively alleviates environmental problems caused by massive CO 2 emissions, but also reduces our excessive dependence on fossil fuels. In this Outlook, we review the latest development in the design of novel and very promising heterogeneous catalysts for direct CO 2 hydrogenation to methanol, liquid hydrocarbons, and higher alcohols. Compared with methanol production, the synthesis of products with two or more carbons (C 2+ ) faces greater challenges. Highly efficient synthesis of C 2+ products from CO 2 hydrogenation can be achieved by a reaction coupling strategy that first converts CO 2 to carbon monoxide or methanol and then conducts a C–C coupling reaction over a bifunctional/multifunctional catalyst. Apart from the catalytic performance, unique catalyst design ideas, and structure–performance relationship, we also discuss current challenges in catalyst development and perspectives for industrial applications.

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“…The same authors also observed that the selectivity could be shifted to mostly branched alkanes if ZSM-5 were replaced by HMCM-22 [44]. Similarly, a recent study by Liu and coworkers demonstrated a strategy to achieve above 90% selectivity to aromatics in the liquid fraction over a bifunctional Na-Fe/ZSM-5 catalyst [45]. Additionally, they were able to shift the p-xylene in total xylenes from 24-26% to 70% when ZSM-5 was coated with SiO2.…”

Section: Trends and Limitations Of The Co2 Conversion To Fuelsmentioning

confidence: 81%

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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Selective production of aromatics from CO₂

Abstract: A composite Na/Fe and SiO2-coated HZSM-5 catalyst system has been developed for the highly selective production of aromatics (93–95%), especially para-xylene, in the liquid phase and light olefins in the gas phase from CO2.

Cited by 122 publications

References 61 publications

Selective Transformation of CO₂ and H₂ into Lower Olefins over In₂O₃‐ZnZrO_x/SAPO‐34 Bifunctional Catalysts

Selective Transformation of CO₂ and H₂ into Lower Olefins over In₂O₃‐ZnZrO_x/SAPO‐34 Bifunctional Catalysts

Novel Heterogeneous Catalysts for CO₂ Hydrogenation to Liquid Fuels

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

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Selective production of aromatics from CO2

Abstract: A composite Na/Fe and SiO2-coated HZSM-5 catalyst system has been developed for the highly selective production of aromatics (93–95%), especially para-xylene, in the liquid phase and light olefins in the gas phase from CO2.

Cited by 122 publications

References 61 publications

Selective Transformation of CO2 and H2 into Lower Olefins over In2O3‐ZnZrOx/SAPO‐34 Bifunctional Catalysts

Selective Transformation of CO2 and H2 into Lower Olefins over In2O3‐ZnZrOx/SAPO‐34 Bifunctional Catalysts

Novel Heterogeneous Catalysts for CO2 Hydrogenation to Liquid Fuels

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

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Resources

About

Selective production of aromatics from CO₂

Selective Transformation of CO₂ and H₂ into Lower Olefins over In₂O₃‐ZnZrO_x/SAPO‐34 Bifunctional Catalysts

Selective Transformation of CO₂ and H₂ into Lower Olefins over In₂O₃‐ZnZrO_x/SAPO‐34 Bifunctional Catalysts

Novel Heterogeneous Catalysts for CO₂ Hydrogenation to Liquid Fuels