Activated Carbon for Catalyst Support from Microwave Pyrolysis of Orange Peel

Su, Shiung Lam and Liew, Rock keey and Yee, Mun Wong and Elfina, Azwar and Ahmad, Jusoh and Rafeah, Wahi (2016) Activated Carbon for Catalyst Support from Microwave Pyrolysis of Orange Peel. Waste and Biomass Valorization. pp. 1-11. ISSN 18772641

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Abstract

Orange peel, representing an abundant fruit waste in Asia, was transformed into activated carbon via the use of microwave pyrolysis. The orange peel was first subjected to microwave pyrolysis over a range of microwave power in order to produce an optimal yield of activated carbon as the target product. The activated carbon was extensively characterized for its porous characteristics, N2 adsorption and desorption isotherms, thermal stability, and chemical composition in order to assess its potential to be used as a catalyst-support material. Microwave pyrolysis of orange peel showed an approximately 70 wt% yield of activated carbon over the range of microwave power considered. The activated carbon was detected to have a high BET surface area associated with type I isotherm, which indicates the presence of microporous structure, thus exhibiting a characteristic of high adsorption capacity. The high adsorption capacity suggests that the activated carbon produced using this pyrolysis approach could act as an adsorbent to adsorb metal ions, therefore it shows great potential to be used as a catalyst-support material—the base material to which catalytically active substance such as metal binds to form a heterogeneous catalyst. The activated carbon also demonstrated high thermal stability in N2 atmospheres, representing a durable material to be synthesized into a catalyst for use in thermal process. Our results show that the activated carbon produced from microwave pyrolysis of orange peel shows exceptional promise as a catalyst-support material.

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