Chemical deactivation of titanosilicate catalysts caused by propylene oxide in the HPPO process

Li, Dongxu; Wang, Rui; Yu, Yunkai; Chen, Zhe; Fang, Nan; Liu, Yueming; He, Min

doi:10.1039/d2cy01814d

Cited by 6 publications

(1 citation statement)

References 94 publications

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“…However, at higher P / P 0 values, the uptake of H 2 O on Nano-H-Beta-180 was notably higher than that of Nano-H-Beta-180-Py-TEFS, primarily due to the greater presence of silanols in the former material. This distinction was further supported by FT-IR spectra (Figure b) in the hydroxyl stretching region, revealing more intense bands at 3740 and 3520 cm –1 in Nano-H-Beta-180 due to a higher concentration of Si–OH and (Si–OH) 4 groups. − These findings align with the results of H 2 O adsorption (Figure a). Subsequently, the impact of hydrophobicity on FUR and FA adsorption was investigated (Figure S10).…”

Section: Resultssupporting

confidence: 74%

Hydrophobic Nanosized H-Beta Catalysis for Biomass Furanic Compound Valorization

Wang,

Sun,

Zhao

et al. 2023

J. Phys. Chem. C

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The depletion of crude oil reserves and escalating concerns about global warming have intensified the quest for sustainable alternatives in the production of fuels and fine chemicals. In this context, the selective transformation of renewable biomass-derived furanic compounds into biofuels and valuable chemicals represents a promising avenue. This research explores the catalytic potential of hydrophobic nanosized H-Beta zeolites in the alkylation of furan and its derivatives. By systematically investigating the influencing factors, including acid strength and hydrophobicity, we revealed that zeolitebased catalysts with moderate acid strengths exhibit superior efficacy in promoting alkylation reactions. Notably, the optimized catalyst, TEFSfunctionalized pyridine-protected nanosized H-Beta-180 (Nano-H-Beta-180-Py-TEFS), demonstrates exceptional selectivity and efficiency in the production of bifurfurylfuran (BFFF), a key precursor for nextgeneration biofuels. Furthermore, the successful implementation of continuous-flow processing enhances the scalability and efficiency of these catalytic transformations, making them highly promising for large-scale applications. This work not only contributes to the development of sustainable chemical processes but also offers a practical solution for the alkylation of furanic compounds, addressing the growing demand for ecofriendly fuels and chemicals.

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Section: Resultssupporting

confidence: 74%

Hydrophobic Nanosized H-Beta Catalysis for Biomass Furanic Compound Valorization

Wang,

Sun,

Zhao

et al. 2023

J. Phys. Chem. C

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Epoxidation of Light Olefin Mixtures with Hydrogen Peroxide on TS-1 Catalyst

Alvear,

Fortunato,

Eränen

et al. 2023

Catal Lett

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The direct epoxidation of mixed ethene and propene feedstocks using hydrogen peroxide over a titanium silicalite (TS-1) catalyst was investigated within a continuous trickle bed reactor operating in laboratory scale. Methanol was employed as the reaction solvent. This study aimed to streamline the epoxidation process by obviating the need for prior separation of alkenes, thereby enhancing process efficiency. An extensive array of operational parameters was explored in a trickle bed reactor, encompassing experimental parameters such as temperature, total pressure, hydrogen peroxide concentration, liquid flow rate, and gas composition. In contrast to prior investigations involving separate ethene and propene epoxidation, this study revealed a reduction in epoxide selectivity. The principal by-products observed were methoxy species, formed through the interaction between the epoxide and methanol, resulting in a ring-opening reaction. The influence of water on this ring-opening process was negligible. Notably, the tunability of the system was demonstrated, highlighting low temperature and elevated partial ethene pressure as pivotal factors for augmentingthe epoxide selectivity. The findings suggest that binary olefin mixtures exhibit diminished selectivity but improved stability. This behavior is potentially linked to the olefin solubility in methanol, or alterations in the surface species concentrations, typically associated with catalyst activity variations. These insights offer a valuable foundation for understanding and optimizing the direct epoxidation of mixed ethene and propene feedstock. Graphical Abstract

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Synthesis strategy of atomically dispersed Au clusters induced by NH3 on TS-1: Significantly improve the epoxidation activity of propylene

Peng

Liu

Guo

et al. 2023

Chemical Engineering Journal

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Chemical deactivation of titanosilicate catalysts caused by propylene oxide in the HPPO process

Abstract: The deactivation behavior of titanosilicates is the basis and key to developing high-performance epoxidation catalysts. Herein, we present an intensive study on the deactivation mechanism of titanosilicates in the HPPO...

Cited by 6 publications

References 94 publications

Hydrophobic Nanosized H-Beta Catalysis for Biomass Furanic Compound Valorization

Hydrophobic Nanosized H-Beta Catalysis for Biomass Furanic Compound Valorization

Epoxidation of Light Olefin Mixtures with Hydrogen Peroxide on TS-1 Catalyst

Synthesis strategy of atomically dispersed Au clusters induced by NH3 on TS-1: Significantly improve the epoxidation activity of propylene

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