Optimization of PSA process for producing enriched hydrogen from plasma reactor gas
Optimization of PSA process for producing enriched hydrogen from plasma reactor gas
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DOI：
10.1016/j.seppur.2007.12.017
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发表时间：
2008-08-01
影响因子：
8.6
通讯作者：
Eic, Mladen
中科院分区：
文献类型：
--
作者：
Huang, Qinglin;Malekian, Amir;Eic, Mladen
从各种工艺流中以最佳回收率和能量消耗进行氢气纯化代表了变压吸附（PSA）技术的主要商业用途之一。在用于制氢的等离子体工艺中，来自反应器的流出物流必须被处理以获得高纯度氢气，然后被馈送到燃料电池用于发电或储存在罐中。本文建立了一个用于模拟和优化的严格的变压吸附模型。PSA模型采用非等温、变表观速度和分散系数的本体分离、颗粒吸收的线性驱动力近似和代表吸附平衡的Langmuir等温线。使用gPROMS软件求解模型。广泛的模拟结果，涉及PSA分离性能的参数研究与实验结果相匹配，使用由椰子壳制成的活性炭作为吸附剂。利用gPROMS软件进行优化，得到了实验室规模的50%H-2/50%CH4混合气体和中试规模的25%H-2/75%CH4混合气体的最佳分离条件。(c)2008 Elsevier B. V.保留所有权利。
Hydrogen purification with optimum recovery and energy consumption from various process streams represents one of the major commercial uses of pressure swing adsorption (PSA) technology. In the plasma process for hydrogen production, the effluent stream from a reactor has to be processed to obtain the high purity hydrogen before being fed to fuel cells for power generation or stored in tanks. The major impurity in the effluent stream is unreacted methane.A rigorous PSA model for simulation and optimization purposes has been developed. The non-isothermal, bulk separation with variable superficial velocity and dispersion coefficient, linear driving force approximation for particle uptake, and Langmuir isotherm to represent adsorption equilibrium were applied in the PSA modeling. The model was solved using gPROMS software. The extensive simulation results involving parametric studies of PSA separation performance were well matched with the experimental results using an activated carbon made from coconut shell as an adsorbent. The optimal conditions for separation of 50%H-2/50%CH4 mixture in a laboratory-scale PSA unit, and separation of 25%H-2/75%CH4 mixture, representing exit gas from plasma reactor, in a pilot-scale PSA unit were obtained by carrying out optimization routines in gPROMS. (c) 2008 Elsevier B.V. All rights reserved.