适用于SCR的固体储氨材料开发研究
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摘要
适用于SCR的先进固体储氨材料开发研究,开发固态形式的SCR尾气后处理用车载氨源,使用碱土金属氯化物氯化锶材料与2%~10%比例的膨胀石墨均匀混合,形成氯化锶-膨胀石墨复合材料。在氨气压力不低于4 bar的条件下发生氨合反应,形成氨合氯化锶复合材料,该材料有效氨含量高46%,是现有液体尿素还原剂的2.5倍以上。通过热重分析、导热系数测定、模拟分析以及充放氨试验,得出氨合氯化锶材料的相关特性,确定该材料的使用条件。氨合氯化锶材料在SCR车载氨源技术中应用具有使用成本低、氨有效含量高、储存运输安全方便等特点。
Research and development of solid materials as ammonia sources for deNO_x SCR system,development of solid state form of SCR exhaust aftertreatment with on-board ammonia source,the use of chlorides strontium materials mixed with 2%~10%proportion of expanded graphite evenly,formation of strontium chloride/expanded graphite composite materials.Under the condition of not less than 4 bar ammonia pressure,ammonia reaction formation of ammine chloride strontium composite material,the material effective high ammonia content 46%,2.5 times more that of the existing liquid urea reductant.By thermogravimetric analysis,thermal conductivity test, simulation analysis and adsorption/desorption properties tests,the materials data of properties can be got.Ammine chloride strontium material application in SCR on-board ammonia source technology has Characteristics of the low cost,high ammonia content of effective component and storage convenient transportation safety,etc.
引文
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