汽油车超低排放净化技术

Gasoline Vehicle Ultra Low Emission Purification Technology Acceptance Report

（1）以汽油车尾气排放的污染物为研究对象,在汽油车超低排放净化技术方面,围绕国4以上排放标准的技术需求,开发高耐热性汽油车密耦催化剂,使催化剂能够低温快速起燃,明显改善催化性能,达到削减冷启动排放的目的;开发宽空燃比窗口的三效催化净化技术,明显提高催化剂储放氧的能力与速度;集成汽油机密耦催化剂、宽空燃比窗口的三效催化剂与其他污染物净化技术产品,提高产品的一致性,实现5～8个车型配套,实现5辆以上汽油车的示范运行。技术指标：1汽油车排放净化效果满足国4以上排放标准;2净化器寿命达到12～16万km;3实现5～8个车型配套;4建成年产300万套生产能力的净化器生产线;5实现5辆以上汽油车的示范运行;（2）所开展的主要工作和主要技术成果包括：根据汽油车污染物冷启动排放特点,借助耐高温储氧材料与高温氧化铝载体,开发了高活性、耐高温的HC起燃催化剂。从优化综合性能和降低成本出发,重点研究全Pd催化剂,以铈锆储氧材料改性氧化铝载体,采用溶胶凝胶法,在堇青石陶瓷载体上原位制备了Pd/Ce O2-Zr O2/Al2O3催化剂。所研制的整体式低温HC催化剂,新鲜和硫老化样对C3H8/C3H6的T50分别达到210°C和314°C,能够满足国4排放标准对催化剂的需求。（3）根据汽油车污染物排放特点,开发了宽空燃比三效催化剂。以过渡金属Mn、Fe、Co、Ni和Cu掺杂铈锆样品作为研究体系,以动态储放氧性能、动态空燃比窗口特性,水煤气变换及水蒸汽重整反应活性评价作为研究手段,研究了引入第三组元后对样品结构及催化性能的影响规律。

The main work carried out by the 2 and main technical results include： 1 according to the gasoline engine cold start emission characteristics of pollutants, with the aid of high temperature oxygen storage materials with high temperature alumina carrier,the development of high activity, high temperature resistant HC combustion catalyst. From the optimization of comprehensive performance and reduce the cost of the whole Pd, focuses on the study of catalyst, alumina carrier modified with cerium zirconium oxygen storage material, sol-gel, on cordierite ceramic carrier in situ prepared Pd/Ce O2-Zr O2/Al2O3 catalyst.Monolithic catalysts for low-temperature HC developed, fresh and sulfur aging on C3H8/C3H6 T50 to 210 °C and 314 °C,4emission standard can meet the demand of the catalyst. 2 according to the emission characteristics of gasoline vehicle pollutants,wide air fuel ratio three effect catalyst development. Transition metal Mn, Fe, Co, Ni and Cu doped ceria zirconia samples as the research system, fuel ratio window characteristics with dynamic oxygen storage properties, dynamic air, water gas shift and steam reforming reaction activity evaluation as the research methods, the influence on the sample structure and catalytic properties of the introducing third yuan.