The reaction of ozone with adsorbent charcoal

Deitz, Victor R.; Bitner, J.L.

doi:10.1016/0008-6223(72)90037-1

Cited by 41 publications

(21 citation statements)

References 11 publications

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“…Table 1 summarises the effect of pre-treatments on activated carbon textural and acid/basic characteristics. Oxidation reactions between ozone gas and carbon surface seem to be responsible for a reduction in BET area and a slight increase in mesopore surface area, since extended oxidation leads to the destruction of pore walls, forming volatile species [15]. Overall, 20-30% original mass was lost when virgin activated carbon was ozonated during 60 min with 5 g O 3 /h.…”

Section: Textural and Chemical Surface Analysismentioning

confidence: 98%

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Ozonation of benzothiazole saturated-activated carbons: Influence of carbon chemical surface properties

Váldes

Zaror

2006

Journal of Hazardous Materials

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Section: Textural and Chemical Surface Analysismentioning

confidence: 98%

“…The reaction mechanisms involving heterogeneous gas-solid ozonation of carbonaceous materials have been the subject of extensive research [13,15,[30][31][32]. Gaseous ozone has been thought to adsorb on the carbon surface by chemical interaction between one of its terminal atomic oxygen and surface active sites.…”

Section: Mechanistic Considerationsmentioning

confidence: 99%

Ozonation of benzothiazole saturated-activated carbons: Influence of carbon chemical surface properties

Váldes

Zaror

2006

Journal of Hazardous Materials

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“…This same influence by O 3 and AO was observed previously by the authors and other researchers. [31][32][33][34] Nonetheless, even at this low pH, the AO-regen-seeded reactor was able to produce better removal rates than the air-regenseeded reactor. This indicates that the microorganisms present were able to tolerate low pH conditions and still maintain their effectiveness.…”

Section: Microbial Growth and Phmentioning

confidence: 99%

Effect of Advanced Oxidants Generated Via Ultraviolet Light on a Sequentially Loaded and Regenerated Granular Activated Carbon Biofilter

Dusenbury

Cannon

2004

Journal of the Air & Waste Management Association

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The objective of this research was to investigate a sequentially loaded and regenerated granular activated carbon (GAC) biofilter system and to determine whether regenerative ozonation/advanced oxidation could improve the removal and biodegradation of a volatile organic compound from a contaminated airstream. Bench-scale reactors were constructed to operate in a manner analogous to a commercially available system manufactured by TerrAqua Environmental Systems (only with longer contact time). The GAC system consisted of two GAC biofilter beds that operated in a cyclical manner. On a given day, the first GAC bed adsorbed methyl isobutyl ketone from a simulated waste airstream, while the second bed underwent regeneration; then on the next day, the second bed was in the adsorption mode while the first was regenerated.Three bench-scale systems were used to compare the performance under three operating conditions: (1) ozone/ associated oxidant regeneration of a GAC biofilter system that was seeded with microorganisms from a field site, (2) a humid air regeneration of a seeded GAC biofilter, and (3) a humid air regeneration of an unseeded GAC biofilter. For the advanced oxidant regenerated GAC biofilter, a maximum removal efficiency of Ͼ95% was achieved with an empty bed contact time of 148 sec and an influent concentration of 125 ppm methyl isobutyl ketone, and 90 -95% was achieved at 148-sec empty bed contact time and a 1150-ppm influent.

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“…A possible physical mechanism of absorption suppression is the blockage of fine porosity by surface oxides [28,29]. Table 2 shows that ozonation does decrease the total carbon surface area for ash #1, but not by a large enough factor to explain the loss in adsorptivity.…”

Section: Surface Area and Porositymentioning

confidence: 99%

Strategies and Technology for Managing High-Carbon Ash

Hurt¹,

Suuberg²,

Veranth³

et al. 2002

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The overall objective of the present project is to identify and assess strategies and solutions for the management of industry problems related to carbon in ash. Specific research issues to be addressed include:• the effect of parent fuel selection on ash properties and adsorptivity, including a first ever examination of the air entrainment behavior of ashes from alternative (non-coal) fuels.• the effect of various low-NOx firing modes on ash properties and adsorptivity• the kinetics and mechanism of ash ozonation. This data will provide scientific and engineering support of the ongoing process development activities.During this fourth project period we completed the characterization of ozone-treated carbon surfaces and wrote a comprehensive report on the mechanism through which ozone suppresses the adsorption of concrete surfactants.4

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The reaction of ozone with adsorbent charcoal

Cited by 41 publications

References 11 publications

Ozonation of benzothiazole saturated-activated carbons: Influence of carbon chemical surface properties

Ozonation of benzothiazole saturated-activated carbons: Influence of carbon chemical surface properties

Effect of Advanced Oxidants Generated Via Ultraviolet Light on a Sequentially Loaded and Regenerated Granular Activated Carbon Biofilter

Strategies and Technology for Managing High-Carbon Ash

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