Basic study on exhaust gas purification by utilizing plasma assisted MnO2 filter for zero-emission diesel
Basic study on exhaust gas purification by utilizing plasma assisted MnO2 filter for zero-emission diesel
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DOI：
10.1016/j.seppur.2018.12.077
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发表时间：
2019-05
影响因子：
8.6
通讯作者：
Y. Osaka;K. Iwai;T. Tsujiguchi;A. Kodama;Xing Li;Hongyu Huang
中科院分区：
文献类型：
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作者：
Y. Osaka;K. Iwai;T. Tsujiguchi;A. Kodama;Xing Li;Hongyu Huang
柴油机由于具有较高的热效率，已广泛应用于农业重型机械、汽车和远洋船舶等交通运输领域。然而，由于燃烧机理的特性，排放出许多NOx和SOx。为了扩大其用途，这些环境污染物应得到净化。目的建立MnO 2过滤器净化SOx的工艺。在前期的研究中，我们发现MnO_2不仅可以吸收SO_2，而且可以同时吸收NO_2。在本研究中，我们在废气中添加臭氧，以改善SO2和NO2的吸收性能。因此，我们研究了臭氧对脱硫和脱硝性能的影响。结果表明，在SO2和NO2的吸收过程中，加入臭氧可以保持90%以上的吸收率。添加臭氧后，NO2的吸收量显著增加。但MnO 2的利用率超过了理论吸收量。这一结果表明，SO2/NO2净化不仅可能有简单的吸收反应，而且可能有类似于还原分解的净化反应。
Diesel engine has been utilized in transportation, such as in heavy machinery for agricultural usage, automotive vehicle and ocean ships, because of its high thermal efficiency. However, due to the characteristics of the combustion mechanism, many NOx and SOx are emitted. For the expansion of their uses, these environmental pollutants should be purified. We aimed to establish SOx purification technology by using MnO2filter. In our previous study, we found that MnO2can absorb not only SO2but also NO2simultaneously. In this study, to improve absorption performance of SO2and NO2, we added ozone in exhaust gas. Therefore, we investigated the effect of ozone on the desulfurization and denitration performances experimentally. Results showed that maintaining the absorption rate of 90% or more in SO2and NO2absorption was possible by adding ozone. The amount of NO2absorption significantly increased by adding ozone. However, the utilization rate of MnO2exceeded the theoretical absorption amount. This result suggested that SO2/NO2purification may have not only a simple absorption reaction but also a purification reaction similar to reduction denitration.