High-value utilization of citrus peel: Efficient extraction of essential oil and preparation of activated carbon

This paper describes the high-value utilization of citrus peel waste, in which potassium carbonate (K2CO3) was used to assist the extraction of essential oils and served as the activating agent for the further preparation of activated carbons. A common alkali metal salt, K2CO3, was confirmed to be effective in promoting the extraction of essential oils from citrus peel. Compared to the 2.4 wt% extraction rate of essential oils obtained using regular steam distillation, a 6.2 wt% extraction rate was achieved when the citrus peel was pretreated with a K2CO3 solution. Meanwhile, its chemical composition remained stable, indicating that these additional essential oils can also be directly used in areas that have already been developed in the perfume industry. The solid residue collected after essential oil extraction was further used as the precursor for activated carbons. The specific surface area of activated carbons reached up to 1846 m2/g at a carbonization temperature of 800 ºC, and it exhibited a highly developed microporous structure.

[1]  R. Xiao,et al.  Preparation of a dual Pore Structure Activated Carbon from Rice Husk Char as an Adsorbent for CO2 Capture , 2019, Fuel Processing Technology.

[2]  L. A. Godínez,et al.  Optimization of the integral valorization process for orange peel waste using a design of experiments approach: Production of high-quality pectin and activated carbon. , 2019, Waste management.

[3]  H. Yen,et al.  Green extraction of Cymbopogon citrus essential oil by solar energy , 2017 .

[4]  A. Mouahid,et al.  Supercritical CO 2 extraction from endemic Corsican plants; comparison of oil composition and extraction yield with hydrodistillation method , 2017 .

[5]  D. Kalpana,et al.  Activated carbon from orange peels as supercapacitor electrode and catalyst support for oxygen reduction reaction in proton exchange membrane fuel cell , 2017 .

[6]  Y. R. Lee,et al.  Converting citrus wastes into value-added products: Economic and environmently friendly approaches. , 2017, Nutrition.

[7]  Yingru Zhao,et al.  Study of a new combined method for pre-extraction of essential oils and catalytic fast pyrolysis of pine sawdust , 2016 .

[8]  Avtar S. Matharu,et al.  Microwave assisted hydro-distillation of essential oils from wet citrus peel waste , 2016 .

[9]  Céline Hognon,et al.  How inorganic elements of biomass influence char steam gasification kinetics , 2016 .

[10]  André Henrique Rosa,et al.  Application of orange peel waste in the production of solid biofuels and biosorbents. , 2015, Bioresource technology.

[11]  S. Yılmaz,et al.  Evaluation of the effects of essential oil extracted from sweet orange peel (Citrus sinensis) on growth rate of tilapia (Oreochromis mossambicus) and possible disease resistance against Streptococcus iniae , 2015 .

[12]  Carlos A. Ledesma-Escobar,et al.  Towards a comprehensive exploitation of citrus , 2014 .

[13]  Li Wang,et al.  Study on co-pyrolysis characteristics of rice straw and Shenfu bituminous coal blends in a fixed bed reactor. , 2014, Bioresource technology.

[14]  Shi-huai Deng,et al.  Preparation of activated carbon from edible fungi residue by microwave assisted K2CO3 activation--application in reactive black 5 adsorption from aqueous solution. , 2012, Bioresource technology.

[15]  K. Y. Foo,et al.  Factors affecting the carbon yield and adsorption capability of the mangosteen peel activated carbon prepared by microwave assisted K2CO3 activation , 2012 .

[16]  Fazli Sozmen,et al.  Essential oil composition and antibacterial activity of the grapefruit (Citrus Paradisi. L) peel essential oils obtained by solvent-free microwave extraction: comparison with hydrodistillation , 2011 .

[17]  F. Chemat,et al.  Microwave steam diffusion for extraction of essential oil from orange peel: Kinetic data, extract’s global yield and mechanism , 2011 .

[18]  P. Rutkowski.  Pyrolysis of cellulose, xylan and lignin with the K 2CO 3 and ZnCl 2 addition for bio-oil production , 2011 .

[19]  Mohammad J Taherzadeh,et al.  Process design and economic analysis of a citrus waste biorefinery with biofuels and limonene as products. , 2010, Bioresource technology.

[20]  D. T. Liang,et al.  Influence of mineral matter on pyrolysis of palm oil wastes , 2006 .

[21]  M. Donohue,et al.  Classification of Gibbs adsorption isotherms , 1998 .