基于Fluent的微通道天然气废气重整的数值模拟

利用Fluent软件对微通道反应器中天然气废气重整进行数值模拟。利用甲烷来代替天然气进行模拟。多通道反应器由具有平行通道的堇青石块组成,每个平行通道用Rh/Al_2O_3催化剂洗涂。由于堇青石的低热导率,通道之间的热传递被忽略。研究了进料温度,燃料组成和天然气中存在的丙烷对温度和产物分布的影响。通过模拟结果可得出:开始温度沿着通道良好地分布,并且没有形成明显的热点;增加进料温度有利于甲烷转化和氢气生产,但会导致温度分布不均;提高进料中蒸汽的量有助于增加氢气形成,但轻微地减弱了甲烷转化;提高入口处的O_2/C比值可导致甲烷转化率和温度成比例地增加。

Simulation of Exhaust Gas Reforming of Natural Gas in a Microchannel Reactor

The simulation of exhaust gas reforming of natural gas in a catalytic microchannel reactor was carried out by using methane as simulated natural gas. The multichannel reactor was composed of a cordierite block with parallel channels, each of which was washcoated with Rh/Al2O3 catalyst. Due to the low thermal conductivity of cordierite, heat transfer between the channels can be neglected. Effect of feed temperature, fuel composition on the temperature and product distribution was investigated. The results show that the temperature can be well distributed along the channel and no notable hot spot formation is observed; Increasing feed temperature favors methane conversion and hydrogen production, but results in nonuniform temperature distribution; Increasing feed steam amount can increase hydrogen formation, but slightly dampen methane conversion; Increasing O2/C ratio at the inlet can result in a proportional increase in methane conversion and temperature.