Fabrication and Characteristics of Cube-post Microreactors for Methanol Steam Reforming
首发时间:2011-05-11
Abstract:The lamination-plate structure patterned with microchannels and triangle manifolds regarded as one of the preferred constructions for micro fuel reformers. Learned from the microchannel plate structure, a similar plate structure with cube-post array and triangle manifolds is proposed in this work. A micro-milling process is applied to fabricate the cube posts on the plate surface, and the influences of cutting parameters on the burr formation are analyzed. Experimental results indicate that larger cutting speed, smaller feed rate and cutting depth are in favor of obtaining relatively small burrs. Two plates with different cube-post dimensions and manifold structures are experimentally investigated the performances of methanol steam reforming over the Cu/Zn/Al/Zr catalyst. It indicates that the reactor with small-scale cube posts and acute triangle manifold presents better reforming performances at 260℃ than that of the one with large-scale cube posts and right triangle manifolds. However, their performances are closed to each other at relatively high reaction temperature since the catalyst activity is situated in dominated position at the time.
keywords: microreactor methanol steam reforming laminated-plate structure micro-milling
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甲醇重整制氢微柱状反应器的制造与特性
摘要:带有三角形形腔的微通道薄板层叠结构是一种微燃料重整器的理想结构,仿照微通道薄板结构,本文提出一种类似的带有三角形形腔的微柱状叠板结构,并利用一种微铣削方法来加工板表面的微柱状结构。通过实验分析了切削参数对毛刺形成的影响,实验结果表明较大的切削速度、较小的进给速度和背吃刀量都利于形成相对较小的毛刺。通过对两种带有不同柱状尺寸和分布腔形状的薄板内在Cu/Zn/Al/Zr催化剂上的甲醇重整制氢性能进行实验研究。实验结果表明在260℃时带有较小尺寸微柱和锐角三角形形腔的薄板的制氢性能优于带有较大尺寸微柱和直角三角形形腔的薄板。但是在高温下他们的反应性能非常接近,主要是此时催化剂活性占了主导地位。
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No.4425321587741130****
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