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

Takashi Enjoji; Noriaki Shirahama; Seong-Ho Yoon; Yozo Korai; Isao Mochida; Akinori Yasutake; Masaaki Yoshikawa; Takaaki Shimohara

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

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

Department of Advanced Device Materials

Research output: Contribution to journal › Conference article

Abstract

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 language	English
Pages (from-to)	314-315
Number of pages	2
Journal	ACS Division of Fuel Chemistry, Preprints
Volume	48
Issue number	1
Publication status	Published - Mar 1 2003
Event	Proceedings of the 2003 SPE/EPA/DOE Exploration Production Environmental Conference - San Antonio, TX, United States Duration: Mar 10 2003 → Mar 12 2003

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All Science Journal Classification (ASJC) codes

Energy(all)

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Enjoji, T., Shirahama, N., Yoon, S-H., Korai, Y., Mochida, I., Yasutake, A., ... Shimohara, T. (2003). Continuous removal of NO₂ into HNO₃ by pitch and pan based activated carbon fiber. ACS Division of Fuel Chemistry, Preprints, 48(1), 314-315.

Continuous removal of NO₂ into HNO₃ by pitch and pan based activated carbon fiber. / Enjoji, Takashi; Shirahama, Noriaki; Yoon, Seong-Ho; Korai, Yozo; Mochida, Isao; Yasutake, Akinori; Yoshikawa, Masaaki; Shimohara, Takaaki.

In: ACS Division of Fuel Chemistry, Preprints, Vol. 48, No. 1, 01.03.2003, p. 314-315.

Research output: Contribution to journal › Conference article

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abstract = "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.",

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AU - Yoshikawa, Masaaki

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N2 - 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.

AB - 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.

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