Catalytic DPF microwave assisted active regeneration
Catalytic DPF microwave assisted active regeneration
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DOI：
10.1016/j.fuel.2014.09.051
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发表时间：
2015-01
期刊：
影响因子：
7.4
通讯作者：
V. Palma;P. Ciambelli;E. Meloni;A. Sin
中科院分区：
文献类型：
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作者：
V. Palma;P. Ciambelli;E. Meloni;A. Sin
在过去的几十年里，柴油发动机由于与汽油发动机相比具有更高的热效率、更少的二氧化碳和未燃烧的碳氢化合物排放以及更长的使用寿命，越来越受到汽车生产商和公众的关注。然而，烟尘颗粒物和氮氧化物的高排放仍然是其关键问题。过滤器和氧化催化剂的组合是消除废气中烟灰颗粒的最有效的后处理技术之一：沉积的催化剂将烟灰点火温度从 550 °C（非催化反应）降低到柴油机废气的典型值 (180–400 °C)。在我们之前的工作中，我们展示了同时使用微波 (MW) 施加器和 专门催化的柴油颗粒过滤器 (DPF)，负载高达 20 wt% 的铁氧体铜 (CuFe2O4)，可以降低再生所需的温度、能量和时间。从这些非常有希望的结果开始，在这项工作中，我们继续研究，以进一步提高催化 DPF 的性能，降低温度并最大限度地减少再生所需的兆瓦能量。此外，我们通过评估再生阶段的能量平衡，并将其与实际采用的再生技术进行比较，验证了MW技术的可行性。
In the last decades, diesel engines have attracted an increasing interest from vehicles producer and public, due to their higher thermal efficiency, less CO and unburned hydrocarbons emission, and longer lifetime comparing with gasoline engines. However, the high emission of soot particulates and NOx are still their key problems. The combination of filters and oxidation catalysts is one of the most effective after-treatment techniques to eliminate soot particles from the exhaust gases: the deposited catalyst lowers the soot ignition temperature from 550 °C (uncatalyzed reaction) to the typical values of diesel exhaust gases (180–400 °C).In our previous works we showed that the simultaneous use of a microwave (MW) applicator and a specifically catalyzed Diesel Particulate Filter (DPF), loaded up to 20 wt% of Copper Ferrite (CuFe2O4), allows to reduce the temperature, the energy and the time required for the regeneration. Starting by these very promising results, in this work we continued to study in order to further improve the performances of the catalyzed DPF, reducing the temperature and minimizing the MW energy required for the regeneration. Furthermore we verified the feasibility of the MW technology by assessing the energy balance of the regeneration phase, comparing it to the actually employed regeneration technologies.