A microreactor for in-situ hydrogen production by catalytic methanol reforming
A microreactor for in-situ hydrogen production by catalytic methanol reforming
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DOI：
10.1007/978-3-642-56763-6_34
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发表时间：
2001
影响因子：
7.4
通讯作者：
A. Pattekar;M. Kothare;S. V. Karnik;M. Hatalis
中科院分区：
文献类型：
--
作者：
A. Pattekar;M. Kothare;S. V. Karnik;M. Hatalis
本文详细研究了硅基甲醇微重整器的设计和操作中所涉及的理论和实验问题。从重整器芯片的热损失和计算涉及的重整反应的吸热热效应进行了热模拟，以估计重整器的连续操作的总功率需求。利用微机械加工技术制作了一个基于硅微通道的原型重整器，通道横截面为1000μ m × 230μ m，铜层厚度为33nm。反应器芯片与用于反应物和产物输送的管道连接，使用加工成精确尺寸的不锈钢外壳和柔性石墨垫，以在芯片和外壳之间提供气密密封和优异的热接触，用于重整器的外部加热。使用定制的实验装置进行了该原型微重整器的优化，该实验装置用于生成反应物混合物、微反应器的温度控制和产物气体组成的在线测量。介绍了微重整器的试车结果，并讨论了提高氢产率的策略。
A detailed study of the theoretical and experimental issues involved in the design and operation of a silicon-based methanol microreformer is presented in this paper. Thermal simulations for heat loss from the reformer chip and calculations involving the endothermic heat effect of the reforming reaction were carried out to estimate the total power requirement for continuous operation of the reformer. Micromachining technology was utilized to fabricate a prototype silicon microchannel based reformer of channel cross-section 1000μmx 230μmwith a copper layer of thickness ∼ 33nmas catalyst. The reactor chip was interfaced with the tubing for reactant and product transport using a stainless steel housing machined to exact dimensions and flexible graphite pads to provide gas-tight seals and excellent thermal contact between the chip and the housing for external heating of the reformer. Runs of this prototype microreformer were carried out using a custom made experimental setup for generation of the reactant mixtures, temperature control of the microreactor and online measurement of the product gas composition. Results from test runs of the microreformer are presented and strategies for improving the hydrogen yield are discussed.