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Title: Modeling of activated carbon production from lignite

Abstract

In the current work, a model has been successfully developed to describe the production of activated carbons from lignite char by physical activation. The mathematical model is based on the random pore model for the partial gasification undergone in a solid composed of spherical char particles placed in a fixed bed. To provide the necessary experimental input to test the model, three sets of samples have been produced by activation with carbon dioxide at different temperatures and a sequence of times. Data for the adsorption of nitrogen were obtained and analyzed to study the experimental development of the solid porosity in different ranges of pore size. With the initial textural characteristics of the char and only one previously fitted parameter from thermogravimetric analysis, the kinetic constant, the model predicts accurately not only the conversion rate but also the porosity development of the solid to an extent of 60% activation. 16 refs., 3 figs., 2 tabs.

Authors:
; ; ; ; ;  [1]
  1. Instituto de Carboquimica, CSIC, Zaragoza (Spain)
Publication Date:
OSTI Identifier:
20838267
Resource Type:
Journal Article
Resource Relation:
Journal Name: Energy and Fuels; Journal Volume: 20; Journal Issue: 6; Other Information: amastral@carbon.icb.csic.es
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; ACTIVATED CARBON; LIGNITE; MATHEMATICAL MODELS; CARBON DIOXIDE; COAL GASIFICATION; PRODUCTION

Citation Formats

M.V. Navarro, R. Murillo, J.M. Lopez, T. Garcia, M.S. Callen, and A.M. Mastral. Modeling of activated carbon production from lignite. United States: N. p., 2006. Web. doi:10.1021/ef060103o.
M.V. Navarro, R. Murillo, J.M. Lopez, T. Garcia, M.S. Callen, & A.M. Mastral. Modeling of activated carbon production from lignite. United States. doi:10.1021/ef060103o.
M.V. Navarro, R. Murillo, J.M. Lopez, T. Garcia, M.S. Callen, and A.M. Mastral. Fri . "Modeling of activated carbon production from lignite". United States. doi:10.1021/ef060103o.
@article{osti_20838267,
title = {Modeling of activated carbon production from lignite},
author = {M.V. Navarro and R. Murillo and J.M. Lopez and T. Garcia and M.S. Callen and A.M. Mastral},
abstractNote = {In the current work, a model has been successfully developed to describe the production of activated carbons from lignite char by physical activation. The mathematical model is based on the random pore model for the partial gasification undergone in a solid composed of spherical char particles placed in a fixed bed. To provide the necessary experimental input to test the model, three sets of samples have been produced by activation with carbon dioxide at different temperatures and a sequence of times. Data for the adsorption of nitrogen were obtained and analyzed to study the experimental development of the solid porosity in different ranges of pore size. With the initial textural characteristics of the char and only one previously fitted parameter from thermogravimetric analysis, the kinetic constant, the model predicts accurately not only the conversion rate but also the porosity development of the solid to an extent of 60% activation. 16 refs., 3 figs., 2 tabs.},
doi = {10.1021/ef060103o},
journal = {Energy and Fuels},
number = 6,
volume = 20,
place = {United States},
year = {Fri Dec 15 00:00:00 EST 2006},
month = {Fri Dec 15 00:00:00 EST 2006}
}