Portable application of thermal plasma and arc discharge for waste treatment, thermal spraying and surface treatment

Iwao, Toru; Yumoto, Motoshige

doi:10.1002/tee.20033

Cited by 4 publications

(2 citation statements)

References 31 publications

(50 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thermal plasma technology has been applied in various industrial applications such as cutting, welding, spraying, metallurgy, mass spectroscopy, nano-sized particle synthesis, powder spheroidization, and waste treatment [12][13][14][15]. Over the past decade, thermal plasma process has also been regarded as a viable alternative to treat highly toxic wastes, such as air pollutant control (APC) residues, radioactive, and medical wastes [16][17][18][19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Thermal Plasma Gasification of Municipal Solid Waste (MSW)

Byun¹,

Cho²,

Hwang³

et al. 2012

Gasification for Practical Applications

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Thermal Plasma Gasification of Municipal Solid Waste (MSW)

Byun¹,

Cho²,

Hwang³

et al. 2012

Gasification for Practical Applications

View full text Add to dashboard Cite

“…Previous studies on the vitrification of radioactive waste, medical waste, metal-rich sludge, and incinerator fly ash have shown that thermal plasma is a promising technology and particularly well suitable for hazardous waste treatment. – It offers the predominant characteristics of high temperature and high energy density, which allows for effective heat transfer at the reactor boundaries and corresponding fast reaction times during the waste processing. , In the past decade, plasma-based vitrification processes for incineration residues have been extensively developed at laboratory and pilot scales. – The most widely used arc plasma sources in these processes are transferred arc or nontransferred arc plasma torch. One example of the demonstrated vitrification system for incinerator fly ash immobilization is provided by Europlasma .…”

Section: Introductionmentioning

confidence: 99%

Diagnostic of Novel Atmospheric Plasma Source and Its Application to Vitrification of Waste Incinerator Fly Ash

Wang

et al. 2008

Energy Fuels

View full text Add to dashboard Cite

The characteristics of a novel atmospheric plasma source generated by a dc double-anode plasma torch have been investigated by measuring its emission spectra and heat flux. The original plasma torch design has been proven to be effective in enhancing the aerodynamic stability and luminous intensity of the plasma arc, as well as the jet length. As an application, a vitrification process based on the double-arc argon plasma has been employed to convert toxic incinerator fly ash into a harmless, stable, and chemical durable product. The vitrified slag exhibits a homogeneous, highly dense, and amorphous glassy structure, which is further confirmed by scanning electron microscopy and X-ray diffraction. The leaching concentrations of the target heavy metals in the slag are decreased significantly and are much lower than the current regulatory thresholds of China and U.S., which reveals that the contaminants have been sufficiently immobilized in the silicate network matrix. It is also determined that the vitrification contributes to the predominant reduction of the specific surface area of the fly ash and to the improvement of the slag hardness. Furthermore, the total concentrations of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) are also appreciably reduced through the plasma vitrification process with a high decomposition rate of 99.97% in PCDD/Fs and 99.94% in I-TEQ. These results indicate that the vitrified product with good quality has great potential to be used as a viable alternative for construction or geotechnical applications. The vitrification process based on the double-arc plasma technology has been demonstrated to be effective and reliable for the stabilization, detoxification, and recycling of waste incinerator fly ash.

show abstract