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首页> 外文期刊>Japanese journal of applied physics >Complete Decomposition of Benzene, Toluene, and Particulate Matter Contained in the Exhaust of Diesel Engines by Means of Thermally Excited Holes in Titanium Dioxide at High Temperatures
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Complete Decomposition of Benzene, Toluene, and Particulate Matter Contained in the Exhaust of Diesel Engines by Means of Thermally Excited Holes in Titanium Dioxide at High Temperatures

机译：高温下二氧化钛中的热激发孔可完全分解柴油机排气中所含的苯，甲苯和颗粒物

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摘要

We previously reported on a decomposition system of organic wastes by the use of thermally excited holes in TiO_2 at high temperatures. A good feature of our system is that it makes use of a large number of holes formed, for example, at 350 ℃ for the oxidation of organic wastes. In this investigation, we aim at applying this technology to the complete decomposition of benzene, toluene, and particulate matter (PM) included in the exhaust of diesel engines. Special attention has been paid to the adsorption process of benzene and toluene onto the surface of TiO_2, as well as to their subsequent decomposition, as studied by thermal analysis, Raman spectroscopy, and ESR in consideration of the specific surface of TiO_2 powders. Both benzene and toluene are found to completely decompose into H_2O and CO_2 at about 350 ℃, via fragments of ethylene, butene, propene, and butadiene. On the other hand, PM appears more difficult to decompose due to its powdered form. However, PM was finally confirmed to be decomposed when the mixture of PM and TiO_2 was heated under a pressure of about 280 N/m~2 at about 350 ℃.
机译：我们先前曾报道过通过在高温下使用TiO_2中的热激发空穴来分解有机废物的系统。我们系统的一个很好的特点是它利用了例如在350℃形成的大量孔来氧化有机废物。在这项研究中，我们旨在将该技术应用于柴油发动机排气中所含的苯，甲苯和颗粒物（PM）的完全分解。考虑到TiO_2粉末的比表面积，通过热分析，拉曼光谱和ESR研究了苯和甲苯在TiO_2表面上的吸附过程以及它们随后的分解，这引起了人们的特别关注。发现苯和甲苯在约350℃时会通过乙烯，丁烯，丙烯和丁二烯的碎片完全分解为H_2O和CO_2。另一方面，由于粉末状的粉末，PM似乎更难分解。然而，当在约280 N / m〜2的压力和约350℃的压力下加热PM和TiO_2的混合物时，PM最终被分解。

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