Sensitivity of process efficiency to reaction routes in exhaust-gas reforming of diesel fuel

被引：0
|
作者：
Tsolakis, A. [1 ]
Golunski, S.E. [2 ]
机构：
[1] School of Engineering, Mechanical and Manufacturing Engineering, University of Birmingham, Birmingham B15 2TT, United Kingdom
[2] Johnson Matthey Technology Centre, Blount's Court, Sonning Common, Reading RG4 9NH, United Kingdom
来源：
Chemical Engineering Journal | 2006年 / 117卷 / 02期
关键词：
A catalytic exhaust-gas reformer is a largely passive reactor; which has to be capable of operating effectively at flow rates and inlet temperatures determined by the internal combustion engine. In this study; we examine the limited number of design parameters that can allow us to maximise the engine-reformer system efficiency while improving vehicle emissions. In principle; this balance requires that the endothermic hydrogen-generating reactions (steam reforming and dry reforming) are promoted at the expense of the exothermic reactions (oxidation; water-gas shift and methanation). In practice; an oxidation function is necessary for generating heat to drive the endothermic reactions; particularly at low exhaust gas temperatures. Water-gas shift and methanation respond to changes in size and aspect ratio of the reformer; but the ideal configuration for suppressing these CO-consuming reactions does not favour the efficient endothermic reactions at all operating conditions. Our results imply that the optimum exhaust-gas reformer cannot be achieved through reactor engineering alone; but will require further catalyst design. © 2006 Elsevier B.V. All rights reserved;
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页码：131 / 136
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