Abstract Computational fluid dynamics was applied for sorption enhanced steam methane reforming (SESMR) operating in a circulating fluidized bed (CFB) riser. The solid mixtures consisted of Ni-based catalyst and CaO sorbent. The aim of study was to design a proper pilot-scale CFB riser which produced hydrogen (H2) with both high purity and high flux. The design parameters and the reaction parameters were examined with 2k full factorial design. The significances of each parameter were analyzed by analysis of variance. Using the optimum result, the highest H2 purity reached 98.58% in dry basis accompanied with the highest H2 flux of 0.301 kg/m2 s. The hydrodynamics of this optimum case showed that SESMR was nearly completed since 5.0 m height because axial and radial distributions of solid were well developed without excessive segregation between catalyst and sorbent. Thus, the H2 purity and the H2 flux approached fully developed within the riser height.

中文翻译：

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循环流化床提升管吸附强化蒸汽甲烷重整制氢参数研究

摘要 计算流体动力学被应用于在循环流化床 (CFB) 立管中运行的吸附增强蒸汽甲烷重整 (SESMR)。固体混合物由Ni基催化剂和CaO吸附剂组成。研究的目的是设计一个合适的中试规模的 CFB 立管，以生产高纯度和高通量的氢气 (H2)。设计参数和反应参数采用 2k 全因子设计进行检验。通过方差分析来分析各参数的显着性。使用最佳结果，干基的最高氢气纯度达到 98.58%，最高氢气通量为 0.301 kg/m2 s。这个最佳案例的流体动力学表明，SESMR 从 5 开始就几乎完成了。0 m 高度，因为固体的轴向和径向分布很好，催化剂和吸附剂之间没有过度分离。因此，H2 纯度和H2 通量在立管高度内接近完全发展。