Catalysts used for selective catalytic reduction of NOx on diesel engines were deactivated for 890 and 2299 h in the exhausts from a diesel engine running on Swedish diesel fuel mark 1. The deactivated catalytic monoliths (100 mm long) were cut in 10 mm pieces along their axis and were characterized by physicochemical methods as well as by determination of the activity in the reduction of NOx by NH3 and in the oxidation of NH3 by O2.

中文翻译：

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毒物沿 V2O5/TiO2 柴油 SCR 催化剂整块长度的渗透及其对活性的影响

在使用瑞典柴油燃料标志 1 的柴油发动机的排气中，用于选择性催化还原柴油发动机 NOx 的催化剂被停用 890 和 2299 小时。停用的催化整体（100 毫米长）沿其切割成 10 毫米的碎片轴，并通过物理化学方法以及通过测定 NH3 还原 NOx 和 O2 氧化 NH3 的活性来表征。