Carbon Monoxide

Pulster, Erin L.; Hillman, James V.

doi:10.1002/9781118834015.ch43

Cited by 4 publications

(2 citation statements)

References 37 publications

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“…According to the World Health Organization Europe, it has a higher mortality rate than skin cancer or HIV/AIDS . Carbon monoxide possesses an unpredictable threat to various demographic and occupational groups due to its unspecific formation processes . The complete removal from breathing air at ambient temperature is necessary for the protection of affected people, e.g., firefighters or miners.…”

Section: Introductionmentioning

confidence: 99%

Rapid Screening of CO Oxidation Catalysts Using Optical Calorimetry

Wegner

Wöllner

Zippel

et al. 2019

Ind. Eng. Chem. Res.

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In this study, optical calorimetry is introduced for the investigation of activation procedures and catalyst composition on the catalytic carbon monoxide (CO) oxidation at ambient conditions. In addition, temperature-dependent measurements are presented using a novel temperature-controlled InfraSORP technology. Temperature-dependent measurements as well as the influence of different activation conditions were carried out using a commercially available copper manganese oxide catalyst (CARULITE 300). The influence of the catalyst composition was investigated on copper manganese mixed oxides synthesized by a flame spray pyrolysis process. By comparing the results of optical calorimetry to in situ catalytic measurements, a good linear correlation of the optical signal and the CO conversion is demonstrated. In contrast to standard catalysis, the optical calorimetry allows a rapid screening (only 5–10 min per sample) with even a minimal amount of catalyst sample prior to testing any final candidates for respiratory filter materials in real applications.

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Section: Introductionmentioning

confidence: 99%

Rapid Screening of CO Oxidation Catalysts Using Optical Calorimetry

Wegner

Wöllner

Zippel

et al. 2019

Ind. Eng. Chem. Res.

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“…Carbon monoxide (CO) is an important cell-signaling molecule that affects various biological processes , and is also well-known as an odorless, poisonous pollutant through ligation to the iron–porphyrin complex of heme proteins. CO from incomplete combustion is responsible for ∼25 000 poisonings and ∼500 deaths per year in the US alone. , Although acute CO toxicity requires minutes of exposure at high concentrations (e.g., ∼1000 ppm), long-term exposure to CO even at modest levels (20–50 ppm, well below the 50 ppm of the OSHA permissible exposure limit) can result in toxic symptoms, including dizziness, headaches, nausea, or confusion . Early detection of indoor CO at low levels is therefore of great importance for avoiding chronic household or workplace poisoning.…”

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confidence: 99%

Colorimetric Sensor Array for Monitoring CO and Ethylene

Suslick

2018

Anal. Chem.

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Developing miniaturized and inexpensive detectors remains an important and practical goal for field-deployable monitoring of toxic gases and other bioactive volatiles. CO (a common toxic pollutant) and ethylene (the phytohormone primarily responsible for fruit ripening) share the capability of strong back-π-bonding to low-oxidation-state metal ions, which has proved important in the development of metal-ion-based sensors for these gases. We report herein cumulative colorimetric sensor arrays based on Pd(II)-silica porous microsphere sensors and their application as an optoelectronic nose for rapid colorimetric quantification of airborne CO and ethylene. Quantitative analysis of two gases was obtained in the range of 0.5 to 50 ppm with detection limits at the sub-parts-per-million level (∼0.4 ppm) after 2 min of exposure and ∼0.2 ppm after 20 min (i.e., <0.5% of the permissible exposure limit for CO and <10% of the ethylene concentration needed for fruit ripening). We further validate that common potential interfering agents (e.g., changes in humidity or other similar air pollutants such as NO x , SO2, H2S, or acetylene) are not misidentified with CO or ethylene. Finally, the sensor is successfully used for the quantification of ethylene emitted from ripening bananas, demonstrating its potential applications in the monitoring of fruit ripening during storage.

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Tailoring Catalytic Properties of Copper Manganese Oxide Nanoparticles (Hopcalites‐2G) via Flame Spray Pyrolysis

et al. 2018

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Humidity tolerant copper manganese oxide catalysts of the second generation (“Hopcalites‐2G”) were produced by flame spray pyrolysis process (FSP) and their catalytic activity for carbon monoxide oxidation under dry and humid conditions was evaluated. The effects of synthesis parameters such as flame specific variables (OFR=oxygen to fuel ratio, sheath gas, reactor) and the precursor specifications (composition, concentration, solvent) were investigated systematically. From the findings of the synthesis variations, it was possible to identify key factors decisive to achieve a high catalytic activity for CO oxidation under humid conditions. The most important characteristics are phase composition, specific surface area and the carbon content to achieve increased long‐term stability of the flame made catalysts under humid conditions. A high productivity in the flame‐based Hopcalite synthesis was achieved with catalysts performances similar or better than that of the commercial Hopcalite catalyst Carulite 300 (CARUS). The most active catalyst showed 50 % higher CO conversion after one hour on stream at 50 °C and humid conditions compared with the reference. The latter is a crucial step towards an improved humidity tolerance of Hopcalite catalysts in respiratory filter applications.

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Carbon Monoxide

Cited by 4 publications

References 37 publications

Rapid Screening of CO Oxidation Catalysts Using Optical Calorimetry

Rapid Screening of CO Oxidation Catalysts Using Optical Calorimetry

Colorimetric Sensor Array for Monitoring CO and Ethylene

Tailoring Catalytic Properties of Copper Manganese Oxide Nanoparticles (Hopcalites‐2G) via Flame Spray Pyrolysis

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