Cited by 312Adsorption and biosorption for pollutant removalThermochemical Biomass Conversion ProcessesCarbon Dioxide Capture Technologies

2-Steps KOH activation of rice straw: An efficient method for preparing high-performance activated carbons

Basta, A.H., Fierro, V., El-Saied, H., Celzard, A.·2009·Bioresource Technology

Abstract

Effects of both pre-treatment and number of steps in KOH activation of raw rice straw (RS) on textural and adsorption properties of RS-derived activated carbons (ACs) were investigated. Three pre-treatment protocols were tested: mechanical, chemical by NaOH pulping, and a combination of both. Activation of RS-based materials was investigated, at a constant temperature of 800 degrees C, according to two ways: a 1-step simultaneous carbonisation-activation with KOH, and a 2-steps process: carbonisation followed by activation by KOH. 2-Steps KOH activation was more efficient in producing activated carbons with high surface areas and high methylene blue adsorption than 1-step KOH activation. Additionally, 2-steps KOH activation increased the yield of activated carbons having moderate ash content (8-14%). Surface areas as high as 1917 m(2)/g were obtained when the combined mechanical-chemical pre-treatment method and a 2-steps activation process were carried out.

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Crossref · 10.1016/j.biortech.2009.02.028

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Authors
Basta, A. H., Fierro, V., El-Saied, H., & Celzard, A.
Affiliations
  • National Research Centre (EG)
  • Centre National de la Recherche Scientifique (FR)
Corresponding author
Fierro, V.
Venue
Bioresource Technology
Publisher
Elsevier BV
Published
2009-09
Volume
100
Issue
17
Pages
3941-3947
ISSN
0960-8524 (ISSN-L)
OpenAlex
W2089556291
Cited by
312
References
27
Citations by year
2026: 11 · 2025: 17 · 2024: 17 · 2023: 17 · 2022: 25 · 2021: 29 · 2020: 27 · 2019: 29 · 2018: 26 · 2017: 16 · 2016: 17 · 2015: 12 · 2014: 18 · 2013: 15 · 2012: 17
FWCI
12.37
Type
journal article
Language
en
Open access
closed
Locations
  • Bioresource Technology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Conseil Régional de Lorraine
Topics
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
  • Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
  • Physical Sciences › Engineering › Mechanical Engineering › Carbon Dioxide Capture Technologies
Keywords
rice straw, KOH activation, two-step activation, activated carbon, biomass pretreatment, mechanical pretreatment, carbonization, surface area, methylene blue adsorption, ash content
MeSH terms
Adsorption, Charcoal, Chemistry, Organic, Hydroxides, Kinetics, Lignin, Methylene Blue, Nitrogen, Oryza, Surface Properties, Temperature, Porosity, Potassium Compounds

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