Granular activated carbons from avocado seeds

Sánchez, F. and Agudín, F. and San Miguel Alfaro, Guillermo (2017). Granular activated carbons from avocado seeds. In: "15th International Conference on Environmental Science and Technology", 31st August to 2nd September 2017, Rhodes, Greece. ISBN 978-960-7475-53-4. pp. 1-6.

Description

Title: Granular activated carbons from avocado seeds
Author/s:
  • Sánchez, F.
  • Agudín, F.
  • San Miguel Alfaro, Guillermo
Item Type: Presentation at Congress or Conference (Article)
Event Title: 15th International Conference on Environmental Science and Technology
Event Dates: 31st August to 2nd September 2017
Event Location: Rhodes, Greece
Title of Book: Proceedings of the 15th International Conference on Environmental Science and Technology
Date: 2017
ISBN: 978-960-7475-53-4
Subjects:
Freetext Keywords: Activated carbons; avocado seeds; adsorption; porosity; surface area
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Química Industrial y del Medio Ambiente
UPM's Research Group: Grupo de Agroenergética
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Avocado seeds have proven to be an excellent raw material for the production of Granular Activated Carbons (GAC). This residue, generated in large amounts in centralized facilities dedicated to the transformation of avocado fruit, has no commercial value at present. GAC have been produced by partial gasification of ground seeds under mildly oxidizing conditions (steam/nitrogen mixture). Optimum activation conditions were achieved at 1000 ºC and residence times between 120-150 min, resulting in burn off rates between 34-37 wt% and carbon yields between 12.4-13.0 wt%. These GAC exhibited type IV N2 gas adsorption isotherm, characteristic of materials containing a mixture of micro and mesopores. Avocado seed GACs exhibited BET surface areas up to 700 m2 /g, CO2 surface areas up to 900 m 2 /g and micro-pore volumes up to 0.31 cm3 /g. This porous structure provided these GAC with a remarkable aqueous adsorption capacity for methylene blue (Langmuir qm = 153.8 mg/g and Freundlich Kf = 113.0 mg/g), which was greater than that determined for a range of GAC commercialized for the treatment of waste and drinking waters.

More information

Item ID: 49894
DC Identifier: http://oa.upm.es/49894/
OAI Identifier: oai:oa.upm.es:49894
Official URL: https://cest2017.gnest.org/
Deposited by: Memoria Investigacion
Deposited on: 01 Jun 2018 17:50
Last Modified: 04 Jun 2018 15:50
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