在丁酸甲酯化学反应机理的基础上,添加了详细的NOx生成机理,得到包含214种物质和1 241个基元反应方程式的生物柴油机理。运用均质零维反应器模型,计算了燃烧过程中各基元反应的ROP(Rate of produc-tion,ROP)系数,确定了影响各中间产物...在丁酸甲酯化学反应机理的基础上,添加了详细的NOx生成机理,得到包含214种物质和1 241个基元反应方程式的生物柴油机理。运用均质零维反应器模型,计算了燃烧过程中各基元反应的ROP(Rate of produc-tion,ROP)系数,确定了影响各中间产物生成的主要基元反应方程式。通过ROP分析,阐明了生物柴油燃烧过程中,燃料中的氧,空气中的氧、氮的迁移演变历程,对主要中间产物的前躯体物质进行了分析。研究结果表明:生物柴油中的"CH3OCHO"基团促进了OH的生成,其反应过程中的中间产物CH3OCO促进了CH3的生成,其主要的中间产物HCO促进了H,HO2的生成,形成了能促进NOx生成的重要前躯体物质———OH,H,HO2和CH3,导致NOx排放偏高。展开更多
In this paper, we consider Markov branching processes with killing and resurrection. We first show that the Markov branching process with killing and stable resurrection is just the Feller minimum process which is hon...In this paper, we consider Markov branching processes with killing and resurrection. We first show that the Markov branching process with killing and stable resurrection is just the Feller minimum process which is honest and thus unique. We then further show that this honest Feller minimum process is not only positive recurrent but also strongly ergodic. The generating function of the important stationary distribution is explicitly expressed. For the interest of comparison and completeness, the results of the Markov branching processes with killing and instantaneous resurrection are also briefly stated. A new result regarding strong ergodicity of this difficult case is presented. The birth and death process with killing and resurrection together with another example is also analyzed.展开更多
文摘在丁酸甲酯化学反应机理的基础上,添加了详细的NOx生成机理,得到包含214种物质和1 241个基元反应方程式的生物柴油机理。运用均质零维反应器模型,计算了燃烧过程中各基元反应的ROP(Rate of produc-tion,ROP)系数,确定了影响各中间产物生成的主要基元反应方程式。通过ROP分析,阐明了生物柴油燃烧过程中,燃料中的氧,空气中的氧、氮的迁移演变历程,对主要中间产物的前躯体物质进行了分析。研究结果表明:生物柴油中的"CH3OCHO"基团促进了OH的生成,其反应过程中的中间产物CH3OCO促进了CH3的生成,其主要的中间产物HCO促进了H,HO2的生成,形成了能促进NOx生成的重要前躯体物质———OH,H,HO2和CH3,导致NOx排放偏高。
基金Xiangtan University New Staff Research Start-up Grant (Grant No. 08QDZ27)
文摘In this paper, we consider Markov branching processes with killing and resurrection. We first show that the Markov branching process with killing and stable resurrection is just the Feller minimum process which is honest and thus unique. We then further show that this honest Feller minimum process is not only positive recurrent but also strongly ergodic. The generating function of the important stationary distribution is explicitly expressed. For the interest of comparison and completeness, the results of the Markov branching processes with killing and instantaneous resurrection are also briefly stated. A new result regarding strong ergodicity of this difficult case is presented. The birth and death process with killing and resurrection together with another example is also analyzed.
