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Numerical investigation of the sorption enhanced steam methane reforming in a fluidized bed reactor

机译：流化床反应器中吸附增强蒸汽甲烷重整的数值研究

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The sorption enhanced steam methane reforming (SE-SMR) in a laboratory scale fluidized bed reactor is investigated using a three-fluid model. The binary sorbent and catalyst particles segregate due to the density difference between them. The light sorbent particles tend to rise and the heavy catalyst particles tend to sink initially. As the process proceeds, the sorbent particles adsorb more CO2 and become heavier, and the density difference between the binary particles will become smaller, thus they tend to be well-mixed. As the sorbent particles are either at the upper sections of the bed or well-mixed with the catalysts, the adsorption of CO2 can always play the role of sorption enhancement, the hydrogen purity at the outlet is between 98-99% before the breakthrough, which is much higher than that (73-74%) of steam methane reforming (SMR) process. Due to the exothermic CO2 adsorption reaction and the mixing of the gas particle flows, a homogeneous gas/particle temperature distribution is found in the whole bed. In general, the hydrogen purity obtained in the simulations agrees fairly well with the experimental data from Johnsen et al. [1].
机译：在实验室规模的流化床反应器中的吸附增强的蒸汽甲烷重整（SE-SMR）是使用三流体模型中研究。二进制吸附剂和催化剂颗粒偏析由于它们之间的密度差。光吸附剂颗粒趋于上升和重催化剂颗粒倾向于最初下沉。随着过程的进行，吸附剂颗粒吸附更多的CO 2并变得更重，和二进制颗粒之间的密度差将变得更小，因此它们趋向于良好混合。由于吸附剂颗粒或者是在床或与催化剂充分混合的上部分中，CO 2的吸附能始终发挥吸附增强的作用，出口处的氢气纯度是98-99％之间的突破之前，这是蒸汽甲烷重整（SMR）的过程的比（73-74％）高得多。由于放热CO2吸附反应和气体粒子的混合流，均相气体/颗粒的温度分布在整个床中。一般情况下，在模拟得到的氢气纯度一致相当好与来自约翰森等人的实验数据。 [1]。

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