Catalytic ozonation of VOCs at low temperature: A comprehensive review

Liu, Biyuan; Ji, Jian; Zhang, Boge; Huang, Wenjun; Gan, Yanling; Leung, Dennis Y.C.; Huang, Haibao

doi:10.1016/j.jhazmat.2021.126847

Cited by 164 publications

(88 citation statements)

References 208 publications

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“…As a result, increased selectivity to CO2 was observed in the presence of water vapor [40]. Additionally, the presence of water vapor in the reaction feed favored the formation of reactive hydroxyl groups [39] through the interaction of adsorbed water and atomic oxygen O* present on the catalyst surface (stemming from ozone decomposition on the catalyst as shown in Equation ( 1) and discussed in Section 2.3). Such abundant OH groups greatly promote VOCs oxidation, thereby resulting in improved VOCs conversion [39].…”

Section: Case Of the 5mn/tio2mm Catalystmentioning

confidence: 99%

“…Additionally, the presence of water vapor in the reaction feed favored the formation of reactive hydroxyl groups [39] through the interaction of adsorbed water and atomic oxygen O* present on the catalyst surface (stemming from ozone decomposition on the catalyst as shown in Equation ( 1) and discussed in Section 2.3). Such abundant OH groups greatly promote VOCs oxidation, thereby resulting in improved VOCs conversion [39]. Our results are in full agreement with those found in the literature, since the highest conversion of ethanol was achieved when the reaction was performed in the presence of water, whatever the catalyst manganese content (Table 3).…”

Section: Case Of the 5mn/tio2mm Catalystmentioning

confidence: 99%

“…The reaction of VOC oxidation using ozone follows the Langmuir-Hinshelwood (L-H) and/or Mars-Van Krevelen (MvK) mechanisms, depending on the nature of the catalyst, reactant composition and reaction conditions, as discussed in the review recently published by Liu et al [39]. It is proposed that catalysts supported on inert materials like silica follow the L-H mechanism at low temperature, while catalysts with rich surface oxygen species, such as MnOx/Al2O3, follow the MvK mechanism.…”

Section: Active Species and Reaction Mechanismmentioning

confidence: 99%

“…Among the available VOC removal technologies, catalytic oxidation using ozone is recognized as an alternative and effective process particularly suited for the oxidation of volatile organic compounds at temperatures far lower than those used for conventional catalytic oxidation reactions [36][37][38]. Huang and co-workers comprehensively reviewed very recently the advances made in the catalytic oxidation of a variety of VOCs (oxygenated, chlorinated, aromatic and sulfur-containing VOCs) over different catalysts using ozone at low temperature [39]. They showed that this promising technology is well suited for VOC removal at low concentrations.…”

Section: Introductionmentioning

confidence: 99%

“…They showed that this promising technology is well suited for VOC removal at low concentrations. Widespread application of ozone in the treatment of VOCs emitted by industrial processes or present in indoor environments is thus expected to occur in the near future [39]. Ozone is easily produced by flowing air or pure oxygen through a non-thermal plasma reactor [40,41].…”

Section: Introductionmentioning

confidence: 99%

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Low Temperature Catalytic Oxidation of Ethanol Using Ozone over Manganese Oxide-Based Catalysts in Powdered and Monolithic Forms

et al. 2022

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Catalytic oxidation of low concentrations of ethanol was investigated in dry and humid air streams at low temperature (60 °C) over manganese oxide-based catalysts supported on a meso–macrostructured TiO2 using ozone as the oxidant. Ethanol was selected as a representative model VOC present in indoor air, and its concentration was fixed to 10 ppm. For that purpose, a series of Mn/TiO2 powder and monolithic catalysts was prepared, some doped with 0.5 wt% Pd. Whatever the catalyst, the presence of water vapor in the gas phase had a beneficial effect on the conversion of ethanol and ozone. The Pd–Mn/TiO2 catalyst containing 0.5 wt% Pd and 5 wt% Mn exhibited superior oxidation efficiency to the Mn/TiO2 counterparts by increasing ozone decomposition (77%) while simultaneously increasing the selectivity to CO2 (85%). The selectivity to CO2 approached nearly 100% by increasing the amount of catalyst from 20 to 80 mg. In a further step, alumina wash-coated cordierite honeycomb monoliths were coated with the 0.5Pd–5Mn/TiO2 catalyst. Full conversion of ethanol to CO2 without residual O3 emitted (less than 10 ppb) could be attained, thereby demonstrating that the proposed Pd–Mn/TiO2 monolithic catalyst fulfills the specifications required for onboard systems.

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Section: Case Of the 5mn/tio2mm Catalystmentioning

confidence: 99%

Section: Case Of the 5mn/tio2mm Catalystmentioning

confidence: 99%

Section: Active Species and Reaction Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Low Temperature Catalytic Oxidation of Ethanol Using Ozone over Manganese Oxide-Based Catalysts in Powdered and Monolithic Forms

et al. 2022

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Rational prediction of immunogenicity clustering through cross‐reactivity analysis of thirteen SARS‐CoV‐2 variants

Liang,

Tong,

Sun

et al. 2024

Journal of Medical Virology

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SARS‐CoV‐2 breakthrough infections in vaccinated individuals underscore the threat posed by continuous mutating variants, such as Omicron, to vaccine‐induced immunity. This necessitates the search for broad‐spectrum immunogens capable of countering infections from such variants. This study evaluates the immunogenicity relationship among SARS‐CoV‐2 variants, from D614G to XBB, through Guinea pig vaccination, covering D614G, Alpha, Beta, Gamma, Delta, BA.1, BA.2, BA.2.75, BA.2.75.2, BA.5, BF.7, BQ.1.1, and XBB, employing three immunization strategies: three‐dose monovalent immunogens, three‐dose bivalent immunogens, and a two‐dose vaccination with D614G followed by a booster immunization with a variant strain immunogen. Three distinct immunogenicity clusters were identified: D614G, Alpha, Beta, Gamma, and Delta as cluster 1, BA.1, BA.2, and BA.2.75 as cluster 2, BA.2.75.2, BA.5, BF.7, BQ.1.1, and XBB as cluster 3. Broad‐spectrum protection could be achieved through a combined immunization strategy using bivalent immunogens or D614G and XBB, or two initial D614G vaccinations followed by two XBB boosters. A comparison of neutralizing antibody levels induced by XBB boosting and equivalent dosing of D614G and XBB revealed that the XBB booster produced higher antibody levels. The study suggests that vaccine antigen selection should focus on the antigenic alterations among variants, eliminating the need for updating vaccine components for each variant.

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Effect of Fe/Mn Ratio on the Catalytic Oxidation of Toluene over Porous γ-Al2O3 Supported Fe and Mn Bimetal Catalysts

Zhang,

Qin,

Qin

et al. 2024

Catal Lett

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Catalytic ozonation of VOCs at low temperature: A comprehensive review

Cited by 164 publications

References 208 publications

Low Temperature Catalytic Oxidation of Ethanol Using Ozone over Manganese Oxide-Based Catalysts in Powdered and Monolithic Forms

Low Temperature Catalytic Oxidation of Ethanol Using Ozone over Manganese Oxide-Based Catalysts in Powdered and Monolithic Forms

Rational prediction of immunogenicity clustering through cross‐reactivity analysis of thirteen SARS‐CoV‐2 variants

Effect of Fe/Mn Ratio on the Catalytic Oxidation of Toluene over Porous γ-Al2O3 Supported Fe and Mn Bimetal Catalysts

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