Diesel Engine Emissions Mitigation using Cascaded NTP Reactor and Continuous Plasma Activated Adsorption–Desorption
摘要
Non-thermal plasma (NTP) technology demonstrates versatility across various applications, including biomedical solutions and environmental remediation. NTP presents a viable alternative in vehicular exhaust treatment, addressing the limitations of conventional emission control methods that typically suffer from decreased efficiency and durability as time progresses. This study investigates a hybrid methodology that integrates NTP and adsorption-based systems to improve the efficiency and sustainability of pollutant removal processes. A cascaded reactor configuration, comprising an NTP reactor in conjunction with an adsorbent reactor, was evaluated and exhibited enhanced performance relative to individual processes. Furthermore, NTP was utilized for the in-situ regeneration of saturated adsorbent materials, facilitating continuous operation via repeated adsorption–desorption cycles. This study examines the long-term effects of plasma treatment in conjunction with adsorbents. Adsorbent regeneration was conducted in alternating cycles upon achieving saturation. Experiments were performed at a voltage of 19 kV and a frequency of 50 Hz, utilizing an exhaust flow rate of 3 LPM. The results indicated a gradual decrease in pollutant removal efficiency across six cycles, each lasting 3 min. The performance of activated adsorbents was diminished as a result of restricted surface area and saturation effects. MS13x demonstrated an efficacy of nearly 100% in the removal of NOX within a treatment duration of 18 min, utilizing a purge gas flow rate of 1 LPM, even in the presence of elevated initial concentrations. The results highlight the effectiveness of integrating NTP with adsorption technologies as a viable and sustainable approach for the long-term treatment of diesel engine exhaust.