A Review about the Recent Advances in Selected NonThermal Plasma Assisted Solid–Gas Phase Chemical Processes

Abstract

Plasma science has attracted the interest of researchers in various disciplines since the 1990s. This continuously evolving field has spawned investigations into several applications, including industrial sterilization, pollution control, polymer science, food safety and biomedicine. nonthermal plasma (NTP) can promote the occurrence of chemical reactions in a lower operating temperature range, condition in which, in a conventional process, a catalyst is generally not active. The aim, when using NTP, is to selectively transfer electrical energy to the electrons, generating free radicals through collisions and promoting the desired chemical changes without spending energy in heating the system. Therefore, NTP can be used in various fields, such as NOx removal from exhaust gases, soot removal from diesel engine exhaust, volatile organic compound (VOC) decomposition, industrial applications, such as ammonia production or methanation reaction (Sabatier reaction). The combination of NTP technology with catalysts is a promising option to improve selectivity and efficiency in some chemical processes. In this review, recent advances in selected nonthermal plasma assisted solid–gas processes are introduced, and the attention was mainly focused on the use of the dielectric barrier discharge (DBD) reactors.

Fabrication of aerosol-based nanoparticles and their applications in biomedical fields

“…In thermal plasma, the temperatures of gas molecules and free electrons are approximately identical, whereas in non-thermal plasma, free electrons have a temperature of several electron volts, while the overall gas temperature is close to or slightly above room temperature. Moreover, non-thermal plasma can be generated at both low and atmospheric pressure (Palma et al 2020 ; Stryczewska 2020 ).…”

Nonthermal Plasma Induced Fabrication of Solid Acid Catalysts for Glycerol Dehydration to Acrolein

“…The released oxygen could either occupy the surface acid sites, blocking the interaction with HSiW, or push outwards the acid via the "degassing" motion. (3) The O atoms formed in NTP were electrophilic. In some sense, all the electrophiles can be considered as acids.…”

“…[1,2]. NTP has also been used in fabricating supported metal catalysts to improve selectivity and efficiency in some chemical processes [3]. Halverson and Cocke [4] prepared Ru/Al 2 O 3 with highly dispersed metallic particles by impregnation on NTP-grown alumina in an oxygen and water vapor environment.…”

Removal of NO by carbon-based catalytic reduction bed loaded with Mn induced by dielectric barrier discharge at low temperature

“…The non-thermal plasma (NTP) has been reported as a promising and effective technology for removing NO x which generally consists of highly reactive species including electrons, ions, radicals, excited and neutral species [15,16] that all can interact with each other and contribute to the decompose hazardous air pollutants. NTP is used to selectively transfer energy to the electrons, thus avoiding the energy consumption necessary for the heating of the entire gas flow and the strong temperature dependence of the catalytic activity can be overcome by the addition of the plasma technology [17,18]. Dielectric barrier discharge (DBD) has been demonstrated as the superior mode for the generation of NTP [19,20].…”