微型反应器中生物质甲醇催化转化制氢的研究

Study on Catalytic Conversion of Bio-methanol Producing Hydrogen in a Miniature Reactor

笔者创新研制了一种多层板式微型制氢反应器,集甲醇催化燃烧、重整和原料预热于一体;通过计算物流速度分布,合理地设计了单板结构和几何尺寸;反应器依靠液体甲醇的催化燃烧实现水蒸汽重整制氢过程自热运行。考察了反应器启动、变载过程以及稳态性能和寿命,结果表明,当温度为320℃,空速为1600 h-1,水醇比为1.2时,甲醇转化率为100%,重整气中H274.46%,CO224.17%,CO 1.37%;重整腔甲醇空速为1350～1600 h-1,燃烧腔进料量为每min 0.158 m L,反应器可连续运行60 h,甲醇转化率在98%以上;反应器能量效率最高为45%,最大产氢量接近10.74 L·h-1。

A novel multi-plate miniature reactor was designed,which combined hydrogen production with the catalytic combustion of methanol,steam reforming and preheating. The structure and geometry dimension of each plate were designed by computing the flow velocity. Based on the catalytic combustion of bio-methanol,the hydrogen production through steam reforming was realized in self-heating-sustain,i. e. without any external heating during the operating process. The starting up of the system,the process of loading variation,stead-state performance,and the working life of reactor,were investigated.The result showed that the methanol conversion could reach as high as 100% under condition of above 320 ℃,methanol gas velocity of 1600 h- 1,and water/methanol molar ratio of 1. 2. The reformed gas steam contained 74. 46% of H2,24.17% of CO2,and 1. 37% of CO. The system reactor could continuous operate for 60 h under condition of 1350 ～ 1600 h- 1of methanol gas velocity in gas reforming space and the loading velocity of 0. 158 m L·min- 1in combustion space,and obtained 98% of methanol conversion rate,and hydrogen production was about 10. 74 L·h- 1.