This study proposes a novel four-way plasma-catalytic removal of particulate matter, nitrogen oxides, hydrocarbons, and carbon monoxide without external heating using a pulsed dielectric barrier discharge reactor combined with Au/CaSO₄/γ-Al₂O₃ catalyst balls. With the optimized amount of Au and CaSO₄, over 90% of particulate matter, 40% of nitrogen oxides, and nearly 100% of hydrocarbons were removed from the diesel engine exhaust, while the increase of carbon monoxide concentration due to the oxidation of particulate matter and hydrocarbons and the decomposition of carbon dioxide were minimized. Importantly, the performance of the plasma-catalytic reactor was maintained without decline for the duration of the experiment (7 h) with an attractive cost/performance ratio. These findings offer a new approach to the simultaneous treatment of diesel exhausts and provide a novel concept for the design of a practical and compact after-treatment device for the diesel engine exhaust gases.

中文翻译：

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柴油机尾气后处理的新型四向等离子体催化方法

本研究中提出了一种使用脉冲电介质势垒放电反应器有Au /硫酸钙组合的新颖的四通等离子体催化去除颗粒物质，氮氧化物，烃类和一氧化碳没有外部加热₄ /γ-Al系₂ ö ₃催化剂球。优化的Au和CaSO _4量，超过90％的颗粒物，40％的氮氧化物和近100％的碳氢化合物被从柴油机废气中去除，而一氧化碳浓度的增加是由于颗粒物和碳氢化合物的氧化以及二氧化碳的分解所致被最小化。重要的是，在整个实验过程中（7小时），等离子催化反应器的性能均保持不变，且成本/性能比极具吸引力。这些发现为柴油机废气的同时处理提供了一种新方法，为柴油机废气的实用而紧凑的后处理装置的设计提供了新颖的概念。