Journal
CARBON LETTERS
Volume 30, Issue 2, Pages 189-198Publisher
SPRINGER JAPAN KK
DOI: 10.1007/s42823-019-00084-2
Keywords
Orange pulp; Nanoporous carbon catalysts; Limonene oxidation; Perillyl alcohol
Funding
- ICREA Academia program [GC 2017 SGR 128]
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The possibility of orange pulp utilization for nanoporous carbons production was investigated. Moreover, processing the obtained materials as limonene oxidation catalysts was studied as well. Limonene was separated from orange pulp obtained from fragmented orange peels-the waste from industrial fruits processing-by means of simple distillation. After the separation of limonene from the biomass, the dried orange pulp was converted to three types of nanoporous carbon catalysts: without activating agent, with NaOH, and with KOH. The catalysts were characterized by XRD, SEM, EDX, AFM, and sorption of N-2 methods. The activities of the obtained catalysts were tested in the oxidation of limonene to perillyl alcohol (the main product), carveol, carvone, and 1,2-epoxylimonene and its diol. In the oxidation processes, hydrogen peroxide was used as the oxidizing agent. This work has shown for the first time that nanoporous carbons obtained from orange pulp waste, after separation of limonene, are active catalysts for limonene oxidation to industrially important value-added products.
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