Challenges and opportunities for zeolites in biomass upgrading: Impediments and future directions

Bornes, Carlos; Santos-Vieira, Isabel; Vieira, Ricardo; Mafra, Luís; Simões, Mário M. Q.; Rocha, João

doi:10.1016/j.cattod.2023.114159

Cited by 11 publications

(2 citation statements)

References 69 publications

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“…However, numerous challenges exist, including the high expenses associated with structure-directing agents and starting materials, energy consumption and, recycling wastes. Moreover, the multistage production comprising expensive procedures hinders commercialization [163][164][165]. As a result, the synthesis of hierarchical zeolites using an environmentally friendly approach has gained attention [166,167].…”

Section: Cost-effective and Eco-friendly Synthesis Approachesmentioning

confidence: 99%

Hydroisomerization Catalysts for High-Quality Diesel Fuel Production

Aljajan,

Stytsenko,

Rubtsova

et al. 2023

Catalysts

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Upgrading the properties of diesel fractions is considered one of the crucial processes in the petrochemical industry; and for this purpose in laboratory-scale researching it is studied on the base of the hydroisomerization of n-hexadecane as a main model reaction. Recently, zeolite-based bifunctional catalysts have proven their efficiency due to their remarkable acidity, shape-selectivity and relative resistance to deactivation. In this review, different topological-type zeolite-based catalysts, the mechanism of their catalytic effect in n-C16 isomerization, and the principles of shape-selectivity are reviewed. A comparison of their structural-operational characteristics is made. The impact of some feedstock impurities on the catalyst’s performance and deactivation due to carbonaceous deposits as well as various modern eco-friendly cost-effective synthesis techniques are also discussed.

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Section: Cost-effective and Eco-friendly Synthesis Approachesmentioning

confidence: 99%

Hydroisomerization Catalysts for High-Quality Diesel Fuel Production

Aljajan,

Stytsenko,

Rubtsova

et al. 2023

Catalysts

View full text Add to dashboard Cite

show abstract

“…Zeolites are widely employed as reactive catalytic surfaces in various chemical conversion and purification processes due to their tunable acidity, porosity, and (hydro)thermal and chemical stability. − Specifically, Faujasites (FAU) exhibit a large and extended pore system of sodalite cages and supercages with pore openings of 2.3 and 7.4 Å diameter, respectively, , which have garnered interest for pilot-scale catalytic conversions. The high-silica FAU-type Y zeolites are among the most popular materials for industrial heterogeneous catalysis, including fluid catalytic cracking, facilitating the production of gasoline from crude oil. ,, Recent upsurge in the interest of heterogeneous catalysis of biomass-derived compounds into value-added chemicals further expands the application space for zeolites. ,− However, in contrast to gas-phase petrochemical and refinery processes, the majority of biomass conversion reactions occur in hot liquid water at moderately high temperatures (100–250 °C) and pressures (5–40 bar). Under these hydrothermal conditions, liquid water could trigger destructive reactions at framework and extra-framework of zeolites. − Despite the notion of zeolite as a stable static porous structure, the liquid water and its autoprotolysis nature generate active species that trigger degradation reactions to reduce or even inhibit catalytic activity .…”

Section: Introductionmentioning

confidence: 99%