China is setting to roll out more strict emissions rule of CHINA Ⅵ Emission Standard which poses huge challenge to automotive catalytic technology.Rare earth elements are the key compositions of the catalysts coating...China is setting to roll out more strict emissions rule of CHINA Ⅵ Emission Standard which poses huge challenge to automotive catalytic technology.Rare earth elements are the key compositions of the catalysts coating.To develop multiple-component rare earth materials is an important way to improve the performance of the catalyst.The study concluded that quaternary or quinary rare earth materials for CHINA Ⅵ Emission Standard,can improve substantially the oxygen storage capacity and high thermal stability of the catalyst,after the modification by Pr/NdAT elements.It improved the utilization efficiency of precious metal.展开更多
中国摩托车排放第Ⅲ阶段标准(以下简称"国Ⅲ标准")对燃油蒸发污染排放开始进行控制。国Ⅳ标准中,对于两轮和边三轮摩托车采用了世界摩托车测试循环(Word Motorcycle Test Cycle,简称WMTC)作为工况法排放测试循环。因此,需要...中国摩托车排放第Ⅲ阶段标准(以下简称"国Ⅲ标准")对燃油蒸发污染排放开始进行控制。国Ⅳ标准中,对于两轮和边三轮摩托车采用了世界摩托车测试循环(Word Motorcycle Test Cycle,简称WMTC)作为工况法排放测试循环。因此,需要对国Ⅲ标准与国Ⅳ标准两种不同循环下脱附流量进行研究,才能确定国Ⅳ标准中蒸发测试项目预处理循环次数。通过测量典型两轮摩托车分别在国Ⅲ和国Ⅳ的不同测试循环下的脱附流量、脱附总量,以提出国Ⅳ标准中蒸发试验预处理运行次数的建议。展开更多
文摘China is setting to roll out more strict emissions rule of CHINA Ⅵ Emission Standard which poses huge challenge to automotive catalytic technology.Rare earth elements are the key compositions of the catalysts coating.To develop multiple-component rare earth materials is an important way to improve the performance of the catalyst.The study concluded that quaternary or quinary rare earth materials for CHINA Ⅵ Emission Standard,can improve substantially the oxygen storage capacity and high thermal stability of the catalyst,after the modification by Pr/NdAT elements.It improved the utilization efficiency of precious metal.
文摘中国摩托车排放第Ⅲ阶段标准(以下简称"国Ⅲ标准")对燃油蒸发污染排放开始进行控制。国Ⅳ标准中,对于两轮和边三轮摩托车采用了世界摩托车测试循环(Word Motorcycle Test Cycle,简称WMTC)作为工况法排放测试循环。因此,需要对国Ⅲ标准与国Ⅳ标准两种不同循环下脱附流量进行研究,才能确定国Ⅳ标准中蒸发测试项目预处理循环次数。通过测量典型两轮摩托车分别在国Ⅲ和国Ⅳ的不同测试循环下的脱附流量、脱附总量,以提出国Ⅳ标准中蒸发试验预处理运行次数的建议。
