Catalytic reduction of nitrogen dioxide by carbon monoxide

Ayen, Richard J.; Yonebayashi, Tomo-o

doi:10.1016/0004-6981(67)90011-x

Cited by 8 publications

(7 citation statements)

References 6 publications

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“…Nitric oxide did not appear to be present. This result was surprising in view of work recently completed on the N02-CO system using a similar catalyst (Ayen and Yonebayashi, 1967); in this case the predominant reduction product was NO.…”

Section: Distribution Of Reaction Productsmentioning

confidence: 83%

“…At its onset several objectives were selected for study: To devise a feed system for gas-phase N02. With a low-flow-rate liquid feed system, problems were encountered with vapor lock (Ayen and Yonebayashi, 1967).…”

Section: Objectivesmentioning

confidence: 99%

“…Reaction Kinetics for Reduction to Nitrogen An investigation was carried out to study the kinetics of the reaction of nitrogen dioxide to the principal product, nitrogen, with hydrogen using barium-promoted copper chromite (Girdler G-22) as a catalyst. The physical properties of this catalyst have been reported (Ayen and Yonebayashi, 1967).…”

Section: Distribution Of Reaction Productsmentioning

confidence: 99%

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Catalytic Reduction of Nitrogen Dioxide with Hydrogen

Ayen¹,

Amirnazmi²

1970

Ind. Eng. Chem. Proc. Des. Dev.

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Section: Distribution Of Reaction Productsmentioning

confidence: 83%

Section: Objectivesmentioning

confidence: 99%

Section: Distribution Of Reaction Productsmentioning

confidence: 99%

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Catalytic Reduction of Nitrogen Dioxide with Hydrogen

Ayen¹,

Amirnazmi²

1970

Ind. Eng. Chem. Proc. Des. Dev.

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“…Several a~thors3~-3' have claimed a reduction of NO in the presence of oxygen, but analysis of the results demonstrates that an excess of reducing agent was always used (with only one excep-tion38, which will be explained in section 5). Under these conditions the process takes place by the reactions (1) and ( 3) or by (4) until all the oxygen has been consumed. Only then reaction (2) starts because some reducing agent is left.…”

Section: Reaction (2)mentioning

confidence: 99%

The difficulty of reducing nitrogen oxides in the presence of oxygen

Bleek

Berg

1980

J. Chem. Technol. Biotechnol.

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A hypothesis is made, based on the literature, which makes it very unlikely that NO can be selectively reduced by any reducing agent other than ammonia. The hypothesis is based upon the very fast reduction of NO2, even in the presence of oxygen, and an easy reoxidation of NO to NO2 which are both preferential to NO reduction in the presence of oxygen. The particular feature of ammonia originates from the fact that in parallel with this reaction, both reactants, under limiting conditions (defined by temperature), participate in a second scheme which leads to the formation of surface complexes dissociating into N2 and/or N2O. These surface complexes are most probably NH4NO2 and NH4NO3. In the presence of oxygen only this second scheme leads to the formation of N2 and or N2O and is even accelerated by the re‐oxidation of NO to NO2.

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“…Nitic oxide (NO) is a known free radical important as a chemical intermediate in multiple environmental reactions (1)(2)(3)(4). In the 1990's, Nitric oxide's function was better elucidated as an endothelium-derived relaxing factor and signaling molecule (5,6).…”

Section: Introductionmentioning

confidence: 99%

The Controversy Persists: Is There a Qualification Criterion to Utilize Inhaled Nitric Oxide in Pre-term Newborns?

et al. 2021

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Inhaled nitric oxide (iNO) use in premature newborns remains controversial among clinicians. In 2014, the American Academy of Pediatrics, Committee on Fetus and Newborn released a statement that the available data do not support routine iNO use in pre-term newborns. Despite the absence of significant benefits, 2016 California data showed that clinicians continue to utilize iNO in pre-term infants. With studies as recent as January 2017, the Cochrane review confirmed no major advantages of iNO in pre-term newborns. Still, it recognized that a subset of pre-term infants with pulmonary hypertension (PHTN) had not been separately investigated. Furthermore, recent non-randomized controlled trials have suggested that iNO may benefit specific subgroups of pre-term newborns, especially those with PHTN, prolonged rupture of membranes, and antenatal steroid exposure. Those pre-term infants who showed a clinical response to iNO had increased survival without disability. These findings underscore the need for future studies in pre-term newborns with hypoxemic respiratory failure and PHTN. This review will discuss the rationale for using iNO, controversies regarding the diagnosis of PHTN, and additional novel approaches of iNO treatment in perinatal asphyxia and neonatal resuscitation in the pre-term population < 34 weeks gestation.

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Catalytic reduction of nitrogen dioxide by carbon monoxide

Cited by 8 publications

References 6 publications

Catalytic Reduction of Nitrogen Dioxide with Hydrogen

Catalytic Reduction of Nitrogen Dioxide with Hydrogen

The difficulty of reducing nitrogen oxides in the presence of oxygen

The Controversy Persists: Is There a Qualification Criterion to Utilize Inhaled Nitric Oxide in Pre-term Newborns?

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