Design and operation of CO2-H2 multi-component separation vacuum pressure swing adsorption process with tandem-column adsorber

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2025-07-22 DOI:10.1016/j.seppur.2025.134461

Nobuyuki Shigaki , Tomoyuki Okida , Yoshiaki Kawajiri

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引用次数: 0

Abstract

Vacuum pressure swing adsorption (VPSA) is a practical option for the separation of CO₂ from various waste gases with a moderate purity required for CO₂ utilization processes. In this study, the performance of the CO₂-H₂ multi-component separation VPSA process, which simultaneously separates CO₂ and H₂ in one cycle of VPSA with tandem adsorption columns, was evaluated experimentally. This process exploits unique characteristics of both the multi-component breakthrough of the feed gas components and the time variation of the desorbed gas composition to realize a simple operation for separating CO₂ and H₂ by gas fractionation. In laboratory VPSA experiments, CO₂ and H₂ separation performance was compared under various operating conditions and designs, including the feed gas volume, adsorption pressure, gas fraction time, type of adsorbent, and column length. From the experiments, the trade-off relationships of the purity of CO₂ and H₂ against recovery of CO₂ and H₂ was revealed. Furthermore, the controllability of CO₂ and H₂ purities was confirmed by changing the operating conditions and design. In a comparison with three different adsorbents changing the column length, it was found that 13X zeolite in a longer column allows effective removal of N₂.

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串联柱吸附器CO2-H2多组分分离真空变压吸附工艺的设计与运行

真空变压吸附（VPSA）是一种实用的选择，用于从二氧化碳利用过程所需的各种废气中分离出中等纯度的二氧化碳。采用串联吸附柱在一个循环内同时分离CO2和H2的多组分VPSA工艺，对其性能进行了实验评价。该工艺利用了原料气组分多组分突破和解吸气组分随时间变化的独特特性，实现了气体分馏分离CO2和H2的简单操作。在实验室VPSA实验中，比较了不同操作条件和设计下的CO2和H2分离性能，包括原料气体积、吸附压力、气体馏分时间、吸附剂类型和塔长。通过实验揭示了CO2和H2的纯度与CO2和H2的回收率之间的权衡关系。此外，通过改变操作条件和设计，确定了CO2和H2纯度的可控性。通过对比三种不同的吸附剂改变柱长，发现13X沸石在较长的柱长中可以有效去除N2。

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.