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中文摘要：
以LaCoO3／K2CO3／Ce0．8Zr0.2O2为催化剂，分别采用程序升温脱附（TPD）和程序升温表面反应测试（TPSR）、恒温存储试验以及以二甲醚（DME）为还原剂的NOx存储．还原循环试验，研究了催化剂存储NOx的热稳定性、NOx存储性能以及DME为还原剂的NOx存储还原（DME-NSR）性能，并考察反应温度和再生时间对DME-NSR的影响规律．结果表明：该催化剂具有较好的存储性能和氧化性能；DME-NSR等温存储-还原循环试验在350℃和400℃下NOx转化率均在60％-80％．
英文摘要：
Using LaCoO3/K2CO3/Ce0.8Zr0.2O2 as the catalyst, dimethyl ether （DME） as the reducer, an investigation on thermal stability of the stored NOx over the NSR catalyst by temperature programmed desorption （TPD） and DME temperature programmed surface reaction （DME-TPSR）method was made. NOx storage and NOx storage/reduction （NSR）performance were also studied using NOx adsorption experiment at constant temperature and storage-reduction experiment. Meanwhile, the influence of reaction temperature and regeneration time on the DME-NSR process was studied. Experimental result shows that LaCoOa/K2CO3/Ce0.8Zr0.2O2 perovskite catalyst gives good NOx storage and oxidation property. NOx conversion ratio is 60%-80% at the temperatures of 350℃ and 400℃.
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