A review of indoor air treatment technologies

Luengas, Angela; Barona, Astrid; Hort, Cécile; Gallastegui, Gorka; Platel, Vincent; Ηλίας, Α.

doi:10.1007/s11157-015-9363-9

Cited by 263 publications

(136 citation statements)

References 102 publications

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“…Various approaches were used to remove HCHO, such as adsorption, plasma technique, photocatalysis and thermal catalytic oxidation . The adsorption method is limited by the maximum adsorption capacity; plasma technique has problems of secondary pollution, high energy consumption, and high cost; photocatalysis is limited by the excitation light source . Thermal catalytic oxidation can realize the complete decomposition of HCHO into H 2 O and CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

2019

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Thermal catalytic oxidation is a promising and effective technique for the removal of harmful formaldehyde (HCHO) in indoor air. Manganese oxide is a mostly‐investigated non‐noble metal oxide catalyst and attracts much attention due to its better catalytic performance for formaldehyde oxidation at low temperature. In this review, the effect of manganese oxide crystal structure, surface morphology and microstructure, surface active oxygen species, reducibility as well as catalytic reaction conditions (temperature, relative humidity and HCHO initial concentration) on catalytic performance, and the catalytic mechanism over manganese oxide were summarized and discussed. The challenges and prospects for future development of manganese oxide in catalytic oxidation of formaldehyde are also covered.

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Section: Introductionmentioning

confidence: 99%

Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

2019

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“…If the affinity between VOC and adsorbent is too weak and the release of VOC is inevitable during thermal regeneration, other more effective regeneration approaches can be employed, such as plasma and O 3 oxidation. Since O 3 and O 2 /air‐plasma driven catalysis is more efficient than O 2 itself, employing it enables the regeneration process to be performed at a rather low temperature . In this manner, the release of VOC can be avoided.…”

Section: Concluding Remarks and Prospectsmentioning

confidence: 99%

“…To meet environmental protection requirements, a great deal strategy have been made to exploit efficient abatement methods for the elimination of low concentrations of VOCs in indoor air, for instance, physical adsorption, photocatalytic oxidation, plasma (nonthermal plasma) oxidation, and thermal catalytic oxidation et al . Physical adsorption is a traditional pollution control method for VOC removal, involving the adsorption of contaminants from the gaseous to the solid phase.…”

Section: Introductionmentioning

confidence: 99%

“…[2] Consequently, the removal of these emitted VOCs (volatile organic chemicals) is a crucial topic in environmental protection. [3] To meet environmental protection requirements, a great deal strategy have been made to exploit efficient abatement methods for the elimination of low concentrations of VOCs in indoor air, for instance, physical adsorption, photocatalytic oxidation, plasma (nonthermal plasma) oxidation, and thermal catalytic oxidation et al [4] Physical adsorption is a traditional pollution control method for VOC removal, involving the adsorption of contaminants from the gaseous to the solid phase. Materials with large surface area and well-developed pore structure, such as active carbon, zeolites, and mesoporous silica are typically used as adsorbents.…”

Section: Introductionmentioning

confidence: 99%

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Catalytic Materials for Low Concentration VOCs Removal through “Storage‐Regeneration” Cycling

Chen

et al. 2019

ChemCatChem

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Compared with other approaches for the removal of VOCs, the concept of “storage‐regeneration” cycling is proposed as an effective and promising way to eliminate low‐concentration indoor VOCs. A key issue in this approach is the design of catalytic materials which should possess balanced properties between storage and regeneration. The materials used for the storage of VOCs such as formaldehyde and benzene should not only possess high and selective VOC storage capacity, but also be easily regenerated without any release of the VOCs or generation of secondary pollutants. To this end, appropriate regeneration methods have been proposed, including thermal regeneration, plasma (nonthermal plasma) oxidation or ozone enabled regeneration. In this short review, these essential features of the cycled “storage‐regeneration” concept for VOC destruction are considered and the prospects for the implementation of this technology are assessed.

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“…What's more, aged sorbents may release formaldehyde when indoor formaldehyde concentration has become lower. Improving the adsorption capacity of sorbents has not eliminated the risk of releasing formaldehyde when sorbents are not replaced in a timely manner …”

Section: Introductionmentioning

confidence: 99%

Gaseous formaldehyde removal: A laminated plate fabricated with activated carbon, polyimide, and copper foil with adjustable surface temperature and capable of in situ thermal regeneration

Chen

Xiao

et al. 2019

Indoor Air

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Formaldehyde is one of the most common indoor air pollutants in Chinese residences. This study introduces a novel laminated plate with adjustable surface temperature to remove gaseous formaldehyde. The plate is fabricated with activated carbon, polyimide, and copper foil via thermal compression. The plate can be regenerated in situ by applying a direct current to the copper foil. Adsorption‐regeneration cycle tests were conducted to evaluate the plate's formaldehyde removal performance. The overall removal efficiency of the fabricated laminated plate with glue mass fraction of 25% and thickness of 1.5 mm was about 30% at the face velocity of 0.8‐1.2 m/s. The pressure drop was about 5 Pa. Its removal ability can be regenerated in situ in 8 minutes by increasing the surface temperature to 80°C. The fabricated laminated plate showed good durability after 52 cycles of adsorption‐regeneration tests. The results indicate that the proposed laminated plate can enhance the purifying efficiency and enlarge the life span of ordinary, cheap sorbents. It makes cheap materials with low performance suitable for air purification.

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A review of indoor air treatment technologies

Cited by 263 publications

References 102 publications

Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

Progress of Catalytic Oxidation of Formaldehyde over Manganese Oxides

Catalytic Materials for Low Concentration VOCs Removal through “Storage‐Regeneration” Cycling

Gaseous formaldehyde removal: A laminated plate fabricated with activated carbon, polyimide, and copper foil with adjustable surface temperature and capable of in situ thermal regeneration

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