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<p><p>车用尿素SCR技术指标要求符合国情,不用地区或者国家对于汽车尾气排放标准控制是不一样的,但是我国内作为新兴的尾气处理I技术,还有待发展。目前车用尿素是重型柴油车达到国四排放标准的必备产品。车用尿素是指尿素浓度为32.5%且溶剂为超纯水的尿素水溶液,原料为车用尿素专用原料和超纯水。重型卡车、客车等柴油车要达到国四排放标准,在尾气处理上就要选用适合的SCR系统,而这项系统必须利用尿素溶液对尾气中的氮氧化物进行处理。因此,车用尿素溶液成了重型卡车及客车达到国四排放标准的必备产品。  SCR是我国减排的最优选择。目前国内现行的柴油国标GB19147-2009要求含硫量≤350ppm,而ECR-DOC技术要求油品含硫量在10ppm以下,因此在中国暂不具有推广条件。SCR则可耐350ppm的含硫油品,因此有推广的技术基础。由于采用SCR技术的国四发动机燃油经济性比EGR技术好、对发动机改动小、对燃油和机油要求较低、在技术升级连续性上具有优势、SCR催化器耐久性好且不存在催化器堵塞的风险,因此SCR技术是最适合我国国情的重型柴油车减排技术路线。<..../p><script src="....../inc..../AspCms_VisitsAdd_id_274.html"><..../script><..../p> <..../div> <div class="met_page">上一条:<a href="....../news..../273.html">车用尿素溶液密度控制在多少合适?<..../a><br ..../>下一条:<a href="....../news..../275.html">国务院批准08年车用尿素溶液施行办法参照欧洲标准<..../a><..../div> <h4 class="related"><span>推荐文章<..../span><..../h4> <div class='relatedlist'> <ul> <li><a href='......../news..../508.html' title='浅谈车用尿素小知识' target='_self'>浅谈车用尿素小知识<..../a><..../li> <li><a href='......../news..../507.html' title='车用尿素溶液质量保证' 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