Enhanced removal of benzene in non-thermal plasma with ozonation, flow recycling, and flow recirculation

Abstract

A double stage AC/DC sequential high voltage reactor has been developed to study the decomposition of benzene in the air stream at atmospheric pressure. The removal efficiency was measured as a function of ozonation, flow recycling, and flow recirculation. Ozonation in the inlet, and recycling of the exhaust stream increased the removal of benzene, also with increasing of specific input energy (J l −1 ) the effect of inlet flow ozonation on benzene decomposition was enhanced. The highest removal efficiency was obtained up to >99% in recirculation six times, while CO 2 selectivity reached 99.9% and energy efficiency was 0.59 g kWh −1 . O 3 production/ decomposition > production of OH radicals > electronic and ionic collisions were indicated as the main mechanisms influencing benzene abatement in this research.

Enhancing CO2 conversion with plasma reactors in series and O2 removal

“…15 % conversion, one might expect that the conversion saturates in less passes through the reactor. As indicated in the introduction [22][23][24][25][26][27][28][29][30][31][32][33][34], a variety of plasma reactors could benefit from reactors in series or a recycle flow, as well as a variety of gas mixtures including CO2 with e.g. methane, hydrogen or nitrogen.…”

“…[21] Even though these concepts of reactors in series and recycle flows are omnipresent in chemical industry, it is not commonly investigated for plasma reactors. Roohollah et al [22] studied plasma reactors in series for benzene removal and could enhance the 55% removal efficiency in a single cycle to complete removal in four cycles. Regarding the cost of (not) recycling gas in a process, Martorell et al [23] calculated the differences for their direct current (DC) arc-jet for the deposition of diamond films.…”

Advancing Sustainable Decomposition of Biomass Tar Model Compound: Machine Learning, Kinetic Modeling, and Experimental Investigation in a Non-Thermal Plasma Dielectric Barrier Discharge Reactor

“…Best-fit line, sum of square of error, standard deviation, and numerical methods were used for simulation and conversion of naphthalene with nitrogen and carrier gas mixtures for 350 elementary and 77 component species in RADICAL software. It defined a new self-consistent chemical kinetic model based on G values [52]. The Chemkin software Plug Flow module simulates a 257 set of reactions and compares the modeling and bench-scale experimentation results.…”

Pt–Au alloy nanoparticles synthesized by glow discharge plasma for enhanced methanol oxidation reaction performance

“…Cold plasma can produce a large number of electronic and free radical active groups, thereby being used for modified materials at low temperatures. [ 12,13 ] To date, various types of nonthermal plasma‐assisted methods have been widely studied, including glow discharge, [ 14 ] dielectric barrier discharge (DBD), [ 15–17 ] corona discharge, [ 18 ] and microwave plasma. [ 19 ] Among them, glow discharge plasma offers a promising and attractive alternative for reduction of metal ions at low temperatures.…”