Continuous removal of NO2 into HNO3 by pitch and pan based activated carbon fiber

Takashi Enjoji, Noriaki Shirahama, Seoung Ho Yoon, Yozo Korai, Isao Mochida, Akinori Yasutake, Masaaki Yoshikawa, Takaaki Shimohara

Research output: Contribution to journalConference articlepeer-review


Reactivity of 20 ppm NO2 in air was studied at 30°C over pitch based activated carbon fiber (ACF, OG20A) and polyacrilonitrile based ACF (FE300) by varying the calcinations temperature of ACF and relative humidity in the reaction gas to find the continuous removal of NO2 in atmosphere in the form of HNO3. The calcination of ACF at ≤ 800°-1100°C in inert atmosphere increased significantly adsorption and oxidation of NO2 as observed for continuous removal of SO2 into H2SO4 over some ACF. NO2 in dry air was disproponionated into NO and adsorbed NO3 over as-received and calcined ACF. NO2 was oxidized and disproportionated into NO3 to be absorbed over the ACF, the latter reaction producing also NO. Oxygen in air enhanced the oxidation of NO2 into adsorbed NO3, reducing NO formation through the disproportionation. Higher humidity increased the stationary NO2 removal to regenerate the active site.

Original languageEnglish
Pages (from-to)314-315
Number of pages2
JournalACS Division of Fuel Chemistry, Preprints
Issue number1
Publication statusPublished - Mar 2003
EventProceedings of the 2003 SPE/EPA/DOE Exploration Production Environmental Conference - San Antonio, TX, United States
Duration: Mar 10 2003Mar 12 2003

All Science Journal Classification (ASJC) codes

  • General Energy


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