柴油机SCRF催化剂研究现状及展望

doi:10.11962/1006-4990.2020-0164

Abstract

Abstract:

By analyzing the impact of future emission regulations on diesel aftertreatment systems,it was found that the SCRF systems having greater advantages of De-NO_x under low temperature or cold start conditions.It will play an important role in meeting China 6b（China′s stage 6 vehicle emission standards） and above.The characteristics and applicability of several carriers commonly used in SCRF were described,and the factors to be considered for carrier material and parameter selection were pointed out.It was found that the carriers with high-void of SiC,ACM and AF having a broad application prospects.The research status and respective characteristics of V/Cu/Fe-SCRF,layered and mixed coating technologies were summarized,it was confirmed that Cu-based molecular sieves were still the preferred coating material for SCRF catalysts,especially after aging of Cu-LTA.It still showed excellent NO_x conversion performance at high temperature.The method and significance of SCRF modeling and simulation were introduced,and it was confirmed that SCRF simulation can be better used for practical application simulation.

Key words: diesel engine, SCRF, soot oxidation, NO_x reduction, catalysts

CLC Number:

TQ131.21

Wang Chaoqiang,Yu Fei,Chang Shiying,Lai Huilong,Ma Jiangli,Yang Dongxia,Zhang Zhongchun. Research status and prospects of diesel SCRF catalysts[J]. Inorganic Chemicals Industry, 2021, 53(2): 5-10.

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References 23

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材质	特征	适用性
Cd	热容低、流通阻力低、起燃速度快	重型车
SiC	强度高、热容量大、热传导性好、碳载量高	主动再生为主
ACM	高孔隙率、压降低、高机械完整性、负载量大	轻型车
AT	负载量大、压降低	轻型车
AF	比表面积大、热熔低、机械强度高、导热快	均适合

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Research status and prospects of diesel SCRF catalysts

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