哲学与科学..doc

等离子体增强催化剂消除柴油机尾气的研究 施沈炫湘 (浙江工商大学环境科学与工程学院，杭州) 中图分类号：X 51l 文献标志码：A 摘要: 由于柴油机杰出的经济性，动力性与耐久性，广泛地应用于公共交通及工程技术等领域。尤其是世界能源危机以后，柴油机动车引起了人类的重视，其中公交车，大型客车等中都使用了柴油机，然而它的尾气排放中存在大量有毒物质，已成为汽车密集和船舶运行广泛区域的主要致污来源，致使环境损坏和人类疾病爆发。 颗粒物质(PM)是柴油机中最突出的污染物，其排放量大约为汽油车的30～100倍，而颗粒物质又是强致癌物质，其危害极大。所以此对柴油车净化的主要目标是下降颗粒物和NOx的排放量。 本文主要研究柴油机尾气中的颗粒物利用低温等离子体的技术。通过等离子体后的柴油机废气，在直接、间接的作用下，将(颗粒物质的主要成分炭粒)氧化成二氧化碳，从而降低尾气中的颗粒物对环境的破坏；同时解析了低温等离子体对颗粒物的作用机理，验证去除pm效果。 关键词：柴油机；颗粒物；等离子体 Study of plasma-enhanced diesel exhaust gas catalysts Elimination Shi Shenxuanxiang Zhejiang Gongshang University Environmental Science and Engineering, Hangzhou Summary：Because diesel outstanding areas of economy, power and durability, widely used in public transport and engineering technology. Especially after the worlds energy crisis, diesel vehicles attracted human attention, including buses, large buses, etc. are used in diesel engines, but there are a lot of toxic substances to its exhaust emissions, it has become a car-intensive and operation of the ship a wide area of the main contaminant sources, resulting in damage to the environment and human disease outbreaks. Particulate matter (PM) is the most prominent of diesel pollutants, emissions amount of about 30 to 100 times that of gasoline vehicles, and particulate matter is a strong carcinogen, it is lethal. Therefore, the main objective of this is to purify diesel particulate matter emissions and decrease of NOx. ? ??This paper studies the diesel engine exhaust particulates using low-temperature plasma technology. By diesel exhaust plasma after direct, indirect role in the (main component of particulate matter carbon particles) is oxidized to carbon dioxide, thereby reducing damage to the exhaust particulate matter to the environment; at the same time to resolve the low temperature plasma particles mechanism, to verify the effect of the removal pm. Keywords：diesel engine；PM； plasma 1引言 1.1研究背景 ??随着我国城镇化、工业化的不断推进，以及资源、能源的消耗量持续增加。使得我国的气体