Efficiency penalty analysis for pure H2 production processes with CO2 capture
Efficiency penalty analysis for pure H2 production processes with CO2 capture
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DOI：
10.1002/aic.11052
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发表时间：
2007
期刊：
影响因子：
3.7
通讯作者：
Wei Feng;P. Ji;T. Tan
中科院分区：
文献类型：
--
作者：
Wei Feng;P. Ji;T. Tan
传统的蒸汽重整（CSR）工艺是由天然气生产纯氢的主要工艺，CO2作为主要副产物。在CSR工艺的基础上，对几种可供选择的CO2捕集制氢工艺进行了模拟和分析。替代方法通过浓缩CO2来捕获CO2，所述方法包括在炉中燃烧一些分离的H2而不是CH4，使用纯氧而不是空气用于燃料气体的燃烧，应用预重整器以减少纯氧的使用，以及在蒸汽重整器中应用H2膜以分离纯H2。基于反应动力学模型，对CSR工艺和CO2捕集替代工艺的反应器进行了模拟。根据热力学效率、每摩尔CH4产生的高压（HP）H2的量、每摩尔HP H2产生的CO2的量和每摩尔HP H2捕获的CO2来评价CSR方法和替代方法。对替代工艺的CO2捕集效率损失进行了比较和讨论。© 2006美国化学工程师学会AIChE J，2007
The conventional steam-reforming (CSR) process is a major process for the production of pure hydrogen from natural gas with CO2 as the main by-product. In this work, based on the CSR process, several alternative H2-producing processes with CO2 capture are simulated and analyzed. The alternative processes capture the CO2 by concentrating the CO2 through the approaches including burning some of the separated H2 instead of CH4 in the furnace, using pure oxygen instead of air for the combustion of fuel gas, applying a prereformer to reduce the usage of pure oxygen, and applying an H2-membrane in the steam reformer to separate pure H2. The reactors of the CSR process and the alternative processes with CO2 capture were simulated based on the kinetic models of the reactions. The CSR process and the alternative processes were evaluated in terms of the thermodynamic efficiency, the amount of high pressure (HP) H2 produced per mole of CH4, the amount of CO2 produced per mole of HP H2, and the CO2 captured per mol of HP H2. The efficiency penalties for CO2 capture of the alternative processes were compared and discussed. © 2006 American Institute of Chemical Engineers AIChE J, 2007