Document Detail


Arundo donax cane as a precursor for activated carbons preparation by phosphoric acid activation.
MedLine Citation:
PMID:  12056497     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Canes from Arundo donax, a herbaceous rapid-growing plant, were used as precursor for activated carbon preparation by phosphoric acid activation under a self-generated atmosphere. The influence of the carbonization temperature in the range 400-550 degrees C and of the weight ratio phosphoric acid to precursor (R = 1.5-2.5) on the developed porous structure of the resulting carbons was studied for 1 h of carbonization time. Surface properties of the activated carbons were dependent on a combined effect of the conditions employed. Carbons developed either with R = 1.5 over the range 400-500 degrees C, or with R = 2 at 500 degrees C exhibited surface areas of around 1100 m2/g, the latter conditions promoting a larger pore volume and enhanced mesoporous character. For both ratios, temperature above 500 degrees C led to reduction in porosity development. A similar effect was found for the highest ratio (R = 2.5) and 500 degrees C. The influence of carrying out the carbonization either for times shorter than 1 h or under flowing N2 was also examined at selected conditions (R = 2, 500 degrees C). Shorter times induced increase in the surface area (approximately 1300 m2/g), yielding carbons with smaller mean pore radius. Activated carbons obtained under flowing N2 possessed predominant microporous structures and larger ash contents than the samples derived in the self-generated atmosphere.
Authors:
T Vernersson; P R Bonelli; E G Cerrella; A L Cukierman
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Bioresource technology     Volume:  83     ISSN:  0960-8524     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2002 Jun 
Date Detail:
Created Date:  2002-06-11     Completed Date:  2002-12-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  95-104     Citation Subset:  IM    
Affiliation:
Programa de Investigación y Desarrollo de Fuentes Alternativas de Materias Primas y Energía--PINMATE, Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Intendente Guiraldes, Ciudad Universitaria, Argentina.
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MeSH Terms
Descriptor/Qualifier:
Adsorption
Biotechnology / methods
Carbon / chemistry
Carbon Compounds, Inorganic / analysis*,  chemistry
Kinetics
Microscopy, Electron, Scanning
Nitrogen / chemistry
Oxygen
Phosphoric Acids / chemistry*
Poaceae / chemistry*
Pressure
Temperature
Time Factors
Chemical
Reg. No./Substance:
0/Carbon Compounds, Inorganic; 0/Phosphoric Acids; 7440-44-0/Carbon; 7664-38-2/phosphoric acid; 7727-37-9/Nitrogen; 7782-44-7/Oxygen

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