【摘 要】
：
In the purification process of automobile exhaust, existing water plays an important role as an oxidant, which converts CO and hydrocarbons (HCs) by the water-g
【机 构】
：
Key Laboratory for Green Chemical Technology of State Education Ministry,China Autonotive Technology
论文部分内容阅读
In the purification process of automobile exhaust, existing water plays an important role as an oxidant, which converts CO and hydrocarbons (HCs) by the water-gas shift (WGS) and the steam reforming (SR) reactions, respectively, especially at high temperatures. Meanwhile it is major component of the exhaust which can affect significantly the thermal stability of the three-way catalyst. Activity experiments were carried out close to the real operation conditions (GHSV, concentration, etc.) with a Pd/Ce0.67Zr0.33O2 catalyst supplying information on the CO and C3H8 oxidation reactions in feedstream formed by different reactant combinations. The obtained results showed that the activity of the CO and C3Hs oxidation was promoted by the addition of steam due to the WGS and SR reactions. The WGS and SR reaction were competitive under oxygen-lean conditions. The kinetic analysis was considered for WGS and SR reactions.
其他文献
结合气固流态化和燃烧合成理论,提出连续动态可控燃烧合成概念.在自主设计、制作的气固流态床设备中,将CoC2O4·2H2O制备成Co3O4.反应物CoC2O4·2H2O粉体和空气分别以一定的
研究经冷加工和退火处理的过饱和Cu-2.65Ni-0.6Si和Cu-2.35Ni-0.6Si-0.6Cr合金.采用软件MAUD分析其显微组织参数的演变,包括晶粒尺寸、应变均方根和位错密度等.结果表明,经过
The magnetocaloric effect of LaFe11.7Si1.3 compound was investigated under an external magnetic field up to 9 T. The magnetization changed drastically at the Cu
提出一个多参数的非线性弹塑性唯象本构模型,该模型能够全面地描述泡沫铝合金的典型三阶段变形特征,即线弹性阶段、应力平台阶段和密实化阶段.考虑到密度(相对密度)是泡沫铝
基于微观相场模型,通过分析Ni75AlxV25-x合金在沉淀过程中D022(Ni3V)相沿[001]方向形成的有序畴界面的界面结构、界面迁移及界面成分,研究界面结构对界面迁移特征和溶质偏聚
讨论搅拌速度、絮凝时间、矿浆pH值和油酸钠浓度等对鞍山微细赤铁矿的油酸钠诱导剪切疏水絮凝和浮选的影响.结果表明:剪切搅拌速度、絮凝时间、矿浆pH和油酸钠浓度对该系统疏
The effects of Y substitution on the magnetic properties and magnetocaloric effect of (Gd1-xYx)3Al2 (x=0-0.3) alloys were investigated by X-ray diffraction and
电磁成形是一种使用脉冲电磁力快速成形的工艺.线圈是电磁成形系统中的一个重要组成部分,需要根据实际应用情况来设计.均匀螺旋线圈通常用在金属板材零件成形中.然而,对于这
在聚丙烯氰基炭纤维上电沉积Ni-Fe合金催化剂,并采用x-射线衍射和拉曼光谱方法考察其对热处理炭纤维石墨化的催化性能.结果表明:Ni-Fe合金在低温条件下对炭纤维石墨化有着优
采用水热法在180℃下反应36 h合成了具有规整八面体状的烧绿石结构La2Sn2O7:Eu3+微晶.采用XRD、TEM、SEM、EDS、FT-IR、Raman和PL对合成产物的晶体结构、颗粒尺寸、形貌和光