Catalysed hardware

Micro-scale plate-t5q)e reformers and multi-channel reformers are being developed for compact units for small-scale operation [188] [282] [319] [488] — for instance for the use in cars. A better catalyst utilisation (larger catalyst effectiveness factor) can be achieved by catalysing the heat transfer surfaces (catalysed hardware) and by leaving the tubular constraint [166] (refer to Section 1.2.4). Some designs involve a... 

The concentration of impurities which inactivate a catalyst, C, usually becomes obvious from a plot of the rate constant of the catalysed reaction against [C], such as is shown in Fig. 4.7. As the purification of the solvent, the monomer, and the hardware progresses, not only does the intercept diminish, but the slope of the line (usually) increases. It has been shown that if the dependence of on monomer concentration, [M], at [C] = constant and on [C] at [M] = constant is available, the [Imp] originating from the solvent and the [Imp] originating from the monomer can be measured separately (Holdcroft and Plesch, 1984). 

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