Preserving Climacteric Fruits by Ripening Hormone Oxidation using nano-KMnO4 Confined within Nanoporous Carbon

  • Addo Hernando Department of Chemical Engineering, Universitas Gadjah Mada, Jl Grafika 2, 55281 Yogyakarta, Indonesia
  • Teguh Ariyanto Department of Chemical Engineering, Universitas Gadjah Mada, Jl Grafika 2, 55281 Yogyakarta, Indonesia
  • Imam Prasetyo Department of Chemical Engineering, Universitas Gadjah Mada, Jl Grafika 2, 55281 Yogyakarta, Indonesia
Keywords: ethylene, fruit preservation, gas solid reactions, potassium permanganate

Abstract

Climacteric fruits naturally can be over-ripened because of ripening hormone composed of ethylene gas. Removal of ethylene gas by potassium permanganate (KMnO4) has successfully preserved the fruit, but there is still a room for improvement through nano-confinement process. This study was conducted to compare the ethylene oxidation rate and fruit preservation ability of KMnO4 and nano-KMnO4. Ethylene oxidation experiment was conducted in a gas-tight vial filled with ethylene gas (~20%v) and either KMnO4 or nano-KMnO4. Ethylene gas concentration inside the vial was periodically measured using gas chromatography (GC). The result revealed that ethylene oxidation rate by nano-KMnO4 is higher than KMnO4. The ethylene oxidation rate kinetic was modeled with a gas-solid reaction model, which is fundamentally more accurate than first-order reaction model. Fruit preservation experiment was conducted in sealed containers filled with banana (Musa acuminata) samples and either KMnO4 or nano- KMnO4, and stored at room temperature. The result revealed that banana preservation duration by nano-KMnO4 is remarkably longer than KMnO4, where unpreserved fruit was ripened after 7 days and fruit preserved by KMnO4 and nano-KMnO4 were ripened after 13 and 16 days respectively.

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Published
2019-06-30
How to Cite
Hernando, A., Ariyanto, T., & Prasetyo, I. (2019). Preserving Climacteric Fruits by Ripening Hormone Oxidation using nano-KMnO4 Confined within Nanoporous Carbon. ASEAN Journal of Chemical Engineering, 19(1), 54-65. Retrieved from https://dev.journal.ugm.ac.id/v3/AJChE/article/view/9080
Section
Articles