Experimental study on TVSA and S-TVSA cycles for CO<sub>2</sub> direct air capture

ZHAO Junde; ZHENG Jiale; ZHOU Aiguo; GE Tianshu

doi:10.12434/j.issn.2097-2547.20240449

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Experimental study on TVSA and S-TVSA cycles for CO₂ direct air capture

更新时间：2025-07-30

- Experimental study on TVSA and S-TVSA cycles for CO₂ direct air capture
- Vol. 50, Issue 7, Pages: 109-117(2025)
- 作者机构：
  
  1.中国石油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.2097-2547.20240449
  CLC： TQ116;X701
- Received：07 November 2024，
  
  Revised：06 December 2024，
  
  Published：25 July 2025
- 稿件说明：
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赵俊德,郑家乐,周爱国等.CO₂直接空气捕集用TVSA与S-TVSA循环的实验研究[J].低碳化学与化工,2025,50(07):109-117.

ZHAO Junde,ZHENG Jiale,ZHOU Aiguo,et al.Experimental study on TVSA and S-TVSA cycles for CO₂ direct air capture[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(07):109-117.
赵俊德,郑家乐,周爱国等.CO₂直接空气捕集用TVSA与S-TVSA循环的实验研究[J].低碳化学与化工,2025,50(07):109-117. DOI： 10.12434/j.issn.2097-2547.20240449.

ZHAO Junde,ZHENG Jiale,ZHOU Aiguo,et al.Experimental study on TVSA and S-TVSA cycles for CO₂ direct air capture[J].Low-Carbon Chemistry and Chemical Engineering,2025,50(07):109-117. DOI： 10.12434/j.issn.2097-2547.20240449.

摘要

为实现“碳中和”目标，CO

直接空气捕集（DAC）技术受到越来越多的关注。设计并构建了吸附式直接空气捕集系统，选用伯胺嫁接类离子交换树脂CO

吸附剂，在采用相同吸附床工况下，针对变温真空吸附（TVSA）和蒸汽辅助吸附（S-TVSA）两种典型的热力循环开展了对比实验研究。结果表明，当环境温度为20~32 ℃时，两种循环模式均可实现大于50%的CO

捕集率，并获得纯度（物质的量分数）高于90%的CO

产品气。在100~120 ℃、水蒸气以1 m

/h持续通入的脱附条件下，S-TVSA循环的CO

生产率可达0.33 kg/(kg·d)，远高于TVSA循环（再生温度70 ℃，真空压力为3 kPa）的生产率（0.15 kg/(kg·d)）。S-TVSA循环的再生能耗远低于TVSA循环，每产出1 t CO

，S-TVSA循环的再生能耗为3.56 GJ，仅为TVSA循环的1/6。研究结果表明，采用所选固态胺吸附剂时，在相近环境条件和相同循环周期内，S-TVSA循环的传热传质效率更高，脱附过程相对彻底，吸附剂的吸附潜能充分发挥，相比TVSA循环更具优势。

Abstract

To achieve the goal of “carbon neutrality”

direct air capture (DAC) technology is receiving increasing attention. The adsorption-based direct air capture system was designed and constructed

utilizing a primary amine-grafted ion exchange resin as the CO

adsorbent. Under the same adsorption bed conditions

a comparative experimental study was conducted on two typical thermal cycles: Temperature vacuum swing adsorption (TVSA) and steam-assisted temperature vacuum swing adsorption (S-TVSA). The experimental results show that

at an ambient temperature of 20~32 ℃

both cycle modes can achieve more than 50% CO

capture ratio and obtain CO

product gas with purity (mole fraction) higher than 90%. Under the desorption condition of 100~120 ℃

continuous steam fed at a flow rate of 1 m

the product gas productivity of the S-TVSA cycle can reach 0.33 kg/(kg·d)

which is much higher than that of TVSA cycle (0.15 kg/(kg·d)) under regeneration temperature of 70 ℃ and vacuum pressure of 3 kPa. The regeneration energy consumption of S-TVSA cycle is much lower than that of TVSA cycle. For 1 t of CO

produced

the regeneration energy consumption of S-TVSA cycle is 3.56 GJ

which is only 1/6 of that of TVSA cycle. The research results show that when the selected solid amine adsorbent is used

under similar environmental conditions and within the same cycle period

the heat and mass transfer efficiency of the S-TVSA cycle is higher

the desorption process is relatively thorough

and the adsorption potential of the adsorbent is fully utilized

making it more advantageous compared to the TVSA cycle.

关键词

Keywords

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Experimental study on TVSA and S-TVSA cycles for CO2 direct air capture

DOI：10.12434/j.issn.2097-2547.20240449

摘要

Abstract

关键词

Keywords

references

Experimental study on TVSA and S-TVSA cycles for CO₂ direct air capture