微反应器中甲醇-水蒸气重整制氢三维模拟

3-D Simulation of Methanol-steam Reforming for Hydrogen Production in Microreactor

为考察进口温度、速度和水醇比对微反应器中甲醇-水蒸气重整制氢过程的影响,利用计算流体力学软件FLUENT中的通用有限速率模型对自行设计的平板微通道反应器中甲醇-水蒸气重整制氢进行了三维数值模拟.反应动力学采用甲醇分解和蒸气重整双速率幂函数模型.计算表明,在反应物进口速度为2.88 m/s、进口温度为493 K和水醇比为1.3的反应条件下,反应器出口转化率达79.8%.通过模拟可以看出微反应器能够在较大的反应物流量下保持较高的出口氢气含量和较高的甲醇转化率.

In order to investigate the effects of inlet temperature,velocity and water methanol molar ratio on methanol- steam reforming for hydrogen production in microreactor, we carry out 3-D simulation of methanol-steam reforming for hydrogen production in self-designed plate microreactor with the application of general finite reaction rate model in CFD software of FLUENT, The kinetics used are DE and SR model, The results show that, At the conditions of inlet velocity, temperature and water methanol molar ratio are 2.88 m/s, 493 K and 1.3 respectively, methanol conversion at the reactor outlet reaches 79.8%. Through the simulation, we can see that in microreactor it can be maintain higher hydrogen molar fraction and methanol conversion at high reactant flow rate.