基于铈-锰基催化剂的微粒捕集器微粒的燃烧特性  

Characteristics of particle combustion based on MnO_x-CeO_2 catalysts for diesel particulate filter

作　　者：左青松[1,2,3] 鄂加强[2] 龚金科[1] 王曙辉[1] 陈韬[2] 李煜[2] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,湖南长沙410082 [2]湖南大学机械与运载工程学院,湖南长沙410082 [3]湖南大学先进动力总成技术研究中心,湖南长沙410082

出　　处：《中南大学学报（自然科学版）》2013年第8期3527-3532,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51276056;51176045);汽车车身国家重点实验室自主课题(61075002);国家留学基金资助项目(201208430262;201306130031)

摘　　要：为了有效降低含铈锰基催化剂的柴油机微粒捕集器微粒燃点温度,建立基于铈锰基催化剂微粒捕集器的物理与数学计算模型,并结合其台架试验,对5种不同质量浓度的铈锰基催化剂燃点温度进行研究,并对含不同质量浓度的铈锰基催化剂进行活性评价。研究结果表明:当催化剂添加量质量浓度为20 mg/L时,燃点温度比未添加催化剂时下降约205℃;催化剂活性评价值温度Kp,Kpm和ΔKp与质量浓度为10 mg/L时相比分别降低10%,8%和7%,且再生时间缩短为7 min,表明含此种浓度的催化剂再生速率较快,再生程度较高,能够更加及时、有效地降低微粒捕集器排气背压。In order to effectively reduce ＇the particulate ignition temperature Of diesel particulate filter contaiining MnOx-CeO2 Catalysts, the physical and mathematical calculation models of MnOx-CeO2 catalysts were established on diesel particulate filter, and according to bench tests, the particulate ignition temperature was studied and the activity measurements of the five different concentrations were processed for MnOx-CeO2 catalyst. The results show that when the mass concentration is 20 mg/L, the ignition temperature drops about 205 ~C, activity measurement values ofKp, Kpm and AKp decrease 10%, 8% and 7% respectively compared with those of the absence of catalyst. Meanwhile, regeneration time can be shortened to 7 min. Diesel particulate filter which contains concentration of this type not only has higher regeneration rate and level, but also decreases effectively exhaust back pressure.

关 键 词：微粒捕集器 微粒 铈锰基催化剂 燃烧 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]