Carbon nanotubes as a superior sorbent for nitrogen oxides

Richard Q. Long; Ralph T. Yang

doi:10.1021/ie000976k

Carbon nanotubes as a superior sorbent for nitrogen oxides

Richard Q. Long
, Ralph T. Yang

Department of Chemical and Biological Engineering

University of Michigan, Ann Arbor

Research output: Contribution to journal › Article › peer-review

165 Scopus citations

Abstract

Carbon nanotubes were prepared and investigated as sorbents for NO, SO₂, and CO₂ in the presence of O₂. The preliminary results indicate that they are a good and reversible sorbent for NO removal at room temperature. An uptake amount of 78 mg/g of NO_x was obtained by TGA when the carbon nanotubes were exposed to 1000 ppm NO + 5% O₂/He for 120 min. The equilibrium amount was near 90 mg/g after 12 h. TPD profiles show that NO₂ and NO desorb from the NO_x-saturated carbon nanotubes at well below 300 °C. FTIR spectra indicate that the adsorbed species are nitrates and trace amounts of NO₂ and (NO)₂ dimers. By comparison, only 29 mg/g of SO₂ (at 500 ppm) and 2 mg/g of CO₂ (at 10%) are adsorbed onto the carbon nanotubes in 120 min.

Original language	English
Pages (from-to)	4288-4291
Number of pages	4
Journal	Industrial and Engineering Chemistry Research
Volume	40
Issue number	20
DOIs	https://doi.org/10.1021/ie000976k
State	Published - Oct 3 2001

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title = "Carbon nanotubes as a superior sorbent for nitrogen oxides",

abstract = "Carbon nanotubes were prepared and investigated as sorbents for NO, SO2, and CO2 in the presence of O2. The preliminary results indicate that they are a good and reversible sorbent for NO removal at room temperature. An uptake amount of 78 mg/g of NOx was obtained by TGA when the carbon nanotubes were exposed to 1000 ppm NO + 5\% O2/He for 120 min. The equilibrium amount was near 90 mg/g after 12 h. TPD profiles show that NO2 and NO desorb from the NOx-saturated carbon nanotubes at well below 300 °C. FTIR spectra indicate that the adsorbed species are nitrates and trace amounts of NO2 and (NO)2 dimers. By comparison, only 29 mg/g of SO2 (at 500 ppm) and 2 mg/g of CO2 (at 10\%) are adsorbed onto the carbon nanotubes in 120 min.",

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AU - Long, Richard Q.

AU - Yang, Ralph T.

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N2 - Carbon nanotubes were prepared and investigated as sorbents for NO, SO2, and CO2 in the presence of O2. The preliminary results indicate that they are a good and reversible sorbent for NO removal at room temperature. An uptake amount of 78 mg/g of NOx was obtained by TGA when the carbon nanotubes were exposed to 1000 ppm NO + 5% O2/He for 120 min. The equilibrium amount was near 90 mg/g after 12 h. TPD profiles show that NO2 and NO desorb from the NOx-saturated carbon nanotubes at well below 300 °C. FTIR spectra indicate that the adsorbed species are nitrates and trace amounts of NO2 and (NO)2 dimers. By comparison, only 29 mg/g of SO2 (at 500 ppm) and 2 mg/g of CO2 (at 10%) are adsorbed onto the carbon nanotubes in 120 min.

AB - Carbon nanotubes were prepared and investigated as sorbents for NO, SO2, and CO2 in the presence of O2. The preliminary results indicate that they are a good and reversible sorbent for NO removal at room temperature. An uptake amount of 78 mg/g of NOx was obtained by TGA when the carbon nanotubes were exposed to 1000 ppm NO + 5% O2/He for 120 min. The equilibrium amount was near 90 mg/g after 12 h. TPD profiles show that NO2 and NO desorb from the NOx-saturated carbon nanotubes at well below 300 °C. FTIR spectra indicate that the adsorbed species are nitrates and trace amounts of NO2 and (NO)2 dimers. By comparison, only 29 mg/g of SO2 (at 500 ppm) and 2 mg/g of CO2 (at 10%) are adsorbed onto the carbon nanotubes in 120 min.

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JO - Industrial and Engineering Chemistry Research

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Carbon nanotubes as a superior sorbent for nitrogen oxides

Abstract

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