Experimental and theoretical study on H-2/CO2 separation by a five-step one-column PSA process

被引:24
作者
Kim, WG [1 ]
Yang, JY [1 ]
Han, SS [1 ]
Cho, CW [1 ]
Lee, CH [1 ]
Lee, HJ [1 ]
机构
[1] YONSEI UNIV,COLL ENGN,DEPT CHEM ENGN,SEOUL 120749,SOUTH KOREA
关键词
pressure swing adsorption; H-2/CO2; system; LDF model; P/F ratio; adsorption time;
D O I
10.1007/BF02705851
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
An experimental and theoretical study is performed for bulk separation of H-2/CO2 mixture (70/30 volume %) by PSA process with zeolite 5A, a process widely used commercially in conjunction with the catalytic steam reforming of natural gas or naphtha, For the optimized adsorption conditions of PSA, the characteristics of adsorption/desorption characteristics have been studied through breakthrough and desorption experiments under various conditions. The purge-to-feed ratio is important to the H-2 product purity only at a long adsorption step time. H-2 could be concentrated from 70% in the feed to 99.99% at H-2 recovery of 67.5%. The results of all five steps in PSA are successfully predicted by the LDF model considering an energy balance and nonlinear isotherm. For the model, the effective diffusivities (D-e) are obtained separately from the uptake curves of H-2 and CO2. The Langmuir-Freundlich isotherm is used to correlate the experimental equilibrium data and is very well fitted to the results.
引用
收藏
页码:503 / 511
页数:9
相关论文
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