Simulation analysis of direct air capture system based on sTVSA

ZHENG Jiale; WANG Kuihua; CHEN Yanlin; WU Junye; ZHAO Junde; ZHOU Aiguo; GE Tianshu

doi:10.12434/j.issn.2097-2547.20250010

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Simulation analysis of direct air capture system based on sTVSA

更新时间：2025-12-25

- Simulation analysis of direct air capture system based on sTVSA
- Vol. 50, Issue 12, Pages: 104-109(2025)
- 作者机构：
  
  1.中国石油集团安全环保技术研究院有限公司，北京 102206
  2.上海交通大学制冷与低温工程研究所，上海 200240
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20250010
  CLC： TQ028;X701
- Received：08 January 2025，
  
  Revised：2025-02-18，
  
  Published：25 December 2025
- 稿件说明：
移动端阅览
郑家乐,王魁华,陈彦霖等.基于sTVSA的直接空气捕集系统模拟分析[J].低碳化学与化工,2025,50(12):104-109.

ZHENG Jiale,WANG Kuihua,CHEN Yanlin,et al.Simulation analysis of direct air capture system based on sTVSA[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(12):104-109.
郑家乐,王魁华,陈彦霖等.基于sTVSA的直接空气捕集系统模拟分析[J].低碳化学与化工,2025,50(12):104-109. DOI： 10.12434/j.issn.2097-2547.20250010.

ZHENG Jiale,WANG Kuihua,CHEN Yanlin,et al.Simulation analysis of direct air capture system based on sTVSA[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(12):104-109. DOI： 10.12434/j.issn.2097-2547.20250010.

摘要

蒸汽辅助变温真空吸附（sTVSA）循环捕集CO

是一种具有应用前景的直接空气捕集（DAC）技术，具有解吸动力学快、驱动势差高及可抑制水脱附等优势。为探讨sTVSA循环在DAC系统中的应用潜力，提出了六步法sTVSA循环（简称“sTVSA循环”），并基于所构建的吸附床及吸附-解吸模型，开展了热力学、动力学及能耗分析。模拟结果表明，与传统变温真空吸附（TVSA）循环相比，在相同的解吸温度与解吸压力下，sTVSA循环可使系统CO

循环容量提高近一倍，并加速解吸动力学，显著提升了系统CO

产量。此外，蒸汽吹扫还可降低系统对解吸温度及解吸压力的要求，使所需解吸温度由100 ℃降至90 ℃，解吸压力由3 kPa升至5 kPa，相较于单纯TVSA循环，能耗降低约19%。因此，基于sTVSA循环构建DAC系统，可有效降低设备投资与运行成本，促进DAC系统的工程化应用，展现出良好的技术前景。

Abstract

Steam-assisted temperature vacuum swing adsorption (sTVSA) cycle for CO

capture is a promising direct air capture (DAC) technology

featuring fast desorption kinetics

high driving potential difference and inhibition of water desorption. To explore the application potential of the sTVSA cycle in DAC systems

a six-step sTVSA cycle (referred to as the “sTVSA cycle”) was proposed. Based on the constructed adsorption bed and adsorption/desorption model

thermodynamic

kinetic and energy consumption analyses were conducted. Simulation results show that

compared with the traditional temperature vacuum swing adsorption (TVSA) cycle

the sTVSA cycle can nearly double the system’s CO

cyclic capacity under the same desorption temperature and pressure

accelerate desorption kinetics

and significantly improve system’s CO

production. In addition

steam purging reduces the system requirements for desorption temperature and pressure

lowering the required desorption temperature from 100 ℃ to 90 ℃ and increasing the desorption pressure from 3 kPa to 5 kPa. Compared to a simple TVSA cycle

energy consumption is reduced by approximately 19%. Therefore

constructing a DAC system based on the sTVSA cycle can effectively reduce equipment investment and operat

ional costs

promote the engineering application of DAC systems

and demonstrates promising technical prospects.

关键词

Keywords

references

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