Plasma-catalysis of metal loaded SBA-15 for toluene removal: Comparison of continuously introduced and adsorption-discharge plasma system

Removal of chlorobenzene using a sequential adsorption–plasma catalytic system over Ag‐, Ce‐ and Mn‐modified activated carbon catalysts

“…Because S BET and textural properties of the four catalysts were almost the same, the different chlorobenzene adsorption performance was not due to physical adsorption. It has been well recognized that metals possessing empty s‐orbitals and d‐orbitals containing available electrons can form strong π‐complexation bonds . Therefore, we believe the significantly enhanced adsorption capacity of Ag/AC can mainly be attributed to the stronger π‐complexation bonds formed by Ag when compared to Ce and Mn …”

“…The VOCs are first trapped in an adsorbent/catalytic material in the absence of plasma until the material becomes saturated and then the adsorbed VOCs are oxidized using NTP . This process has been shown to enhance the energy efficiency and suppress the formation of byproducts and organic intermediates in the removal of toluene, benzene, formaldehyde and ethylene …”

“…In addition to the active component in the catalysts, the supporting material plays an important role in increasing the adsorption and catalytic capacity. Recently, many researchers have explored HZSM, γ‐Al 2 O 3 , SBA and 13X zeolite as supporting materials to enhance the decomposition of VOCs in sequential adsorption–plasma oxidation systems. Activated carbon (AC) is considered an excellent adsorbent for the adsorption of VOCs due to its porous structure and high surface area.…”

“…Activated carbon (AC) is considered an excellent adsorbent for the adsorption of VOCs due to its porous structure and high surface area. AC has a relatively low adsorption affinity for H 2 O when compared to many other adsorbent materials, such as zeolites, and H 2 O is the main reaction product in sequential adsorption–plasma oxidation systems . Delagrange et al observed that the capacity for toluene conversion to CO 2 was greatly enhanced upon the addition of an AC‐supported catalyst in a post‐plasma treatment process.…”

Plasma-Catalytic Mineralization of Toluene Adsorbed on CeO2

“…Therefore, the abatement of VOCs has motivated research toward an efficient and economical approach. Nonthermal plasma (NTP) technology, as an alternative to conventional VOC abatement techniques, received increasing interest during recent decades [6][7][8][9][10][11][12][13][14][15]. However, the application of NTP for VOC abatement has three main drawback: first, the incomplete oxidation of primary pollutants with unwanted side-product emissions; second, the low mineralization rate of organic pollutants; and third, the low energy efficiency [16].…”