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

来源：

KOREAN JOURNAL OF CHEMICAL ENGINEERING | 1995年 / 12卷 / 05期

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

页码：503 / 511

页数：9

共 18 条

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