Examining the role of surface oxygen-containing functional groups in liquid-phase adsorptive denitrogenation on activated carbons by a combination of TPD analysis and multiple linear regression

Na Li, Masoud S. Almarri, Ma Xiaoliang, Qingfang Zha, Chunshan Song

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In order to fundamentally understand the role of surface oxygen-containing functional groups in liquid-phase adsorptive denitrogenation on activated carbons, the adsorptive denitrogenation performance of twelve activated carbons was evaluated in a bath system using the solutions containing quinoline and indole, respectively, in decane. The adsorption isotherms were obtained and the adsorption parameters (K and qm) in the Langmuir isotherm equation were estimated. The surface chemical properties of the activated carbons, including the type and concentration of the oxygen-containing functional groups on the surface, were characterized by the temperature programmed desorption (TPD) on the basis of CO2- and CO-evolution profiles. The adsorption performance of the activated carbons and their physical and chemical properties was conducted by a multiple linear regression method. It was found that the type and amount of the oxygen-containing functional groups play a decisive role in adsorption denitrogenation on the activated carbons. The acidic, especially the stronger acidic, functional groups, such as carboxyl and anhydride, appear to show higher responsibility for adsorption of the basic nitrogen compounds, while the basic oxygen-containing groups have more contribution to adsorption of the neutral nitrogen compounds.

Original languageEnglish (US)
Title of host publicationAmerican Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
StatePublished - Dec 1 2009
Event238th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Washington, DC, United States
Duration: Aug 16 2009Aug 20 2009

Publication series

NameACS National Meeting Book of Abstracts
ISSN (Print)0065-7727

Other

Other238th National Meeting and Exposition of the American Chemical Society, ACS 2009
CountryUnited States
CityWashington, DC
Period8/16/098/20/09

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Li, N., Almarri, M. S., Xiaoliang, M., Zha, Q., & Song, C. (2009). Examining the role of surface oxygen-containing functional groups in liquid-phase adsorptive denitrogenation on activated carbons by a combination of TPD analysis and multiple linear regression. In American Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers (ACS National Meeting Book of Abstracts).