The combined effects of soot load and catalyst activity on the regeneration dynamics of a catalytic diesel particulate filter have been investigated through transient CFD‐based simulations of soot combustion in a single‐channel configuration. The soot load was changed by varying the amount of soot accumulated as cake layer, while keeping the amount of soot trapped inside the catalytic wall constant. Substantially uniform soot combustion that allows reasonably fast regeneration of the filter under controlled temperature conditions has been simulated only in the absence of cake and at relatively low catalyst activity. Conversely, in the presence of cake, numerical predictions have shown that, regardless of both soot load and catalyst activity, fast regeneration always occurs by propagation of sharp reaction fronts that result in high temperature rises. These findings highlight the importance of avoiding the cake formation, while properly optimizing the catalyst activity, to conduct a safe and effective regeneration of catalytic filters. © 2017 American Institute of Chemical Engineers AIChE J, 64: 1714–1722, 2018

中文翻译：

---

烟尘负荷和催化剂活性对催化柴油机颗粒过滤器再生动力学的综合影响

烟灰负荷和催化剂活性对催化柴油机微粒过滤器再生动力学的综合影响已通过基于单通道配置的瞬态CFD烟灰燃烧模拟进行了研究。通过改变积聚为饼状层的碳烟量来改变碳烟量，同时保持捕获在催化壁内的碳烟量恒定。仅在不存在滤饼且催化剂活性相对较低的情况下，模拟了基本上均匀的煤烟燃烧，该燃烧允许在受控的温度条件下使过滤器合理地快速再生。相反，在存在蛋糕的情况下，数值预测表明，无论煤烟量和催化剂活性如何，快速再生总是通过尖锐的反应前沿的传播而发生，从而导致高温上升。这些发现凸显了在适当优化催化剂活性的同时避免滤饼形成的重要性，以进行安全有效的催化过滤器再生。©2017美国化学工程师学会AIChE J，64：1714–1722，2018