Organic-inorganic bi-functionalized hybrid KIT-5: A toolbox for catalytic dehydration of xylose to n-hexyl levulinate

Maryam Dookheh, Alireza Najafi Chermahini and Mohammad Saraji

Renewable Energy, 2022, vol. 200, issue C, 527-536

Abstract: Levulinate esters are bio-based molecules with wide industrial applications as solvents, flavorings, fragrances, diesel blend components, and plasticizers. The current study deals with the synthesis and characterization of a series of acidic mesoporous alumino-silicates (KIT-5, Al-KIT-5x (X = 20,10,5), and a hybrid organic-inorganic Al-KIT-5(20)-Pr-SO3H) and their application in the preparation of n-hexyl levulinate from xylose. The prepared catalysts were thoroughly characterized using various techniques, including FT-IR, XRD, N2 adsorption-desorption, ICP, and SEM. The best catalytic performance was achieved in the presence of Al-KIT-5(20)-Pr-SO3H, which is found to be a bi-functionalized Lewis/Bronsted acid catalyst. The yield of n-hexyl levulinate reached a maximum of 52% at 170 °C in only 7 h. Al-KIT-5(20)-Pr-SO3H represents not only excellent reusability over four successive runs but also shows simple separation from the reaction mixture.

Keywords: n-Hexyl levulinate; Mesoporous aluminum silicate; Biomass conversion; C5 carbohydrate (xylose); Catalytic dehydration (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:200:y:2022:i:c:p:527-536

DOI: 10.1016/j.renene.2022.10.009

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