Hydrogen production by catalytic partial oxidation of iso-octane at varying flow rate and fuel/oxygen ratio: From detailed kinetics to reactor behavior
Hydrogen production by catalytic partial oxidation of iso-octane at varying flow rate and fuel/oxygen ratio: From detailed kinetics to reactor behavior
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DOI：
10.1016/j.apcata.2010.08.051
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发表时间：
2011-01-04
影响因子：
5.5
通讯作者：
Deutschmann, O.
中科院分区：
文献类型：
--
作者：
Hartmann, M.;Maier, L.;Deutschmann, O.
通过实验和数值模拟研究了在铑/氧化铝涂层蜂窝状单块上通过改变燃料与氧气的比率和流量以及在不同的流量下在毫秒级接触时间下异辛烷催化部分氧化制氢。在富燃料条件下，观察到潜在地用作焦炭前体的副产物的形成。副产物的量强烈地取决于流速。燃料转化率和氢气产率都随着流速的增加而增加，即，减少停留时间。自热操作的短接触时间反应器的这种非凡的行为可以通过质量和热量传输以及化学反应的相互作用来理解。因此，一个基本的步骤，如非均相反应机制实施到一个二维流场描述的一个单一的整体通道，再加上整个整体结构的热平衡。(C)2010 Elsevier BV保留所有权利。
Hydrogen production by catalytic partial oxidation of iso-octane is experimentally and numerically studied over a rhodium/alumina coated honeycomb monolith at millisecond contact times by varying both fuel-to-oxygen ratio and flow rates and at varying flow rates. At fuel rich conditions, the formation of by-products potentially serving as coke precursors is observed. The quantity of by-products strongly depends on the flow rate. Both fuel conversion and hydrogen yield increase with increasing flow rate, i.e., decreasing residence time. This extraordinary behavior of autothermally operated short-contact time reactors can be understood by the interaction of mass and heat transport and chemical reactions. Therefore, an elementary-step-like heterogeneous reaction mechanism is implemented into a two-dimensional flow field description of a single monolith channel, coupled with a heat balance of the entire monolithic structure. (C) 2010 Elsevier B.V. All rights reserved.