The separate removal of trace 14CO2 and moist NO(x) from off-gases by adsorption on H-type mordenite

Z. M. Wang, Tsuyoshi Arai, M. Klimagai

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Three kinds of mordenite were examined for the adsorptive separation and removal of trace amounts of 14CO2 and moist NO(x) contained in the off-gases of reprocessing plants for spent nuclear fuels. It was found that protonation of mordenite eliminated any possible removal of CO2 by specific adsorption but induced the dissociative adsorption of NO2 with the formation of nitric acid-like adsorbed species and NO oxidation. FT-IR spectroscopic results confirmed that the Bronsted acid sites existing on H-type mordenites exhibit no interaction with CO2 molecules but can catalyze the dissociative adsorption of NO2. Such properties, together with the lower adsorption temperature and the thermal stability of the adsorbent, suggest a promising process involving H-type mordenites whereby NO(x) can be selectively captured and returned to the dissolving solution while trace amounts of 14CO2-containing carbon oxides pass through the system allowing their subsequent complete removal by entrapment in a solid matrix.

Original languageEnglish
Pages (from-to)255-268
Number of pages14
JournalAdsorption Science and Technology
Volume17
Issue number4
Publication statusPublished - 1999
Externally publishedYes

Fingerprint

Gases
Adsorption
adsorption
gases
Nuclear fuel reprocessing
Nitric Acid
spent fuels
entrapment
nuclear fuels
Protonation
Spent fuels
Nuclear fuels
nitric acid
Nitric acid
adsorbents
Adsorbents
Oxides
dissolving
Thermodynamic stability
thermal stability

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Process Chemistry and Technology
  • Chemistry (miscellaneous)
  • Physical and Theoretical Chemistry

Cite this

The separate removal of trace 14CO2 and moist NO(x) from off-gases by adsorption on H-type mordenite. / Wang, Z. M.; Arai, Tsuyoshi; Klimagai, M.

In: Adsorption Science and Technology, Vol. 17, No. 4, 1999, p. 255-268.

Research output: Contribution to journalArticle

@article{ed3ae213dec5482ab0589e45b9657c67,
title = "The separate removal of trace 14CO2 and moist NO(x) from off-gases by adsorption on H-type mordenite",
abstract = "Three kinds of mordenite were examined for the adsorptive separation and removal of trace amounts of 14CO2 and moist NO(x) contained in the off-gases of reprocessing plants for spent nuclear fuels. It was found that protonation of mordenite eliminated any possible removal of CO2 by specific adsorption but induced the dissociative adsorption of NO2 with the formation of nitric acid-like adsorbed species and NO oxidation. FT-IR spectroscopic results confirmed that the Bronsted acid sites existing on H-type mordenites exhibit no interaction with CO2 molecules but can catalyze the dissociative adsorption of NO2. Such properties, together with the lower adsorption temperature and the thermal stability of the adsorbent, suggest a promising process involving H-type mordenites whereby NO(x) can be selectively captured and returned to the dissolving solution while trace amounts of 14CO2-containing carbon oxides pass through the system allowing their subsequent complete removal by entrapment in a solid matrix.",
author = "Wang, {Z. M.} and Tsuyoshi Arai and M. Klimagai",
year = "1999",
language = "English",
volume = "17",
pages = "255--268",
journal = "Adsorption Science and Technology",
issn = "0263-6174",
publisher = "Multi-Science Publishing Co. Ltd",
number = "4",

}

TY - JOUR

T1 - The separate removal of trace 14CO2 and moist NO(x) from off-gases by adsorption on H-type mordenite

AU - Wang, Z. M.

AU - Arai, Tsuyoshi

AU - Klimagai, M.

PY - 1999

Y1 - 1999

N2 - Three kinds of mordenite were examined for the adsorptive separation and removal of trace amounts of 14CO2 and moist NO(x) contained in the off-gases of reprocessing plants for spent nuclear fuels. It was found that protonation of mordenite eliminated any possible removal of CO2 by specific adsorption but induced the dissociative adsorption of NO2 with the formation of nitric acid-like adsorbed species and NO oxidation. FT-IR spectroscopic results confirmed that the Bronsted acid sites existing on H-type mordenites exhibit no interaction with CO2 molecules but can catalyze the dissociative adsorption of NO2. Such properties, together with the lower adsorption temperature and the thermal stability of the adsorbent, suggest a promising process involving H-type mordenites whereby NO(x) can be selectively captured and returned to the dissolving solution while trace amounts of 14CO2-containing carbon oxides pass through the system allowing their subsequent complete removal by entrapment in a solid matrix.

AB - Three kinds of mordenite were examined for the adsorptive separation and removal of trace amounts of 14CO2 and moist NO(x) contained in the off-gases of reprocessing plants for spent nuclear fuels. It was found that protonation of mordenite eliminated any possible removal of CO2 by specific adsorption but induced the dissociative adsorption of NO2 with the formation of nitric acid-like adsorbed species and NO oxidation. FT-IR spectroscopic results confirmed that the Bronsted acid sites existing on H-type mordenites exhibit no interaction with CO2 molecules but can catalyze the dissociative adsorption of NO2. Such properties, together with the lower adsorption temperature and the thermal stability of the adsorbent, suggest a promising process involving H-type mordenites whereby NO(x) can be selectively captured and returned to the dissolving solution while trace amounts of 14CO2-containing carbon oxides pass through the system allowing their subsequent complete removal by entrapment in a solid matrix.

UR - http://www.scopus.com/inward/record.url?scp=0032822310&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032822310&partnerID=8YFLogxK

M3 - Article

VL - 17

SP - 255

EP - 268

JO - Adsorption Science and Technology

JF - Adsorption Science and Technology

SN - 0263-6174

IS - 4

ER -