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1.中北大学 化学与化工学院,山西 太原 030051
2.中北大学 化工过程强化山西省重点实验室,山西 太原 030051
袁士贤(2001-), 女, 硕士生, 主要从事化学工程与技术的研究。
袁志国(1978-), 男, 教授, 博士, 主要从事超重力化工过程强化、 碳高效捕集的研究。E⁃mail: ncityzg@163.com。
收稿:2025-12-18,
网络首发:2026-06-13,
纸质出版:2026-08-31
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袁士贤, 袁志国, 郭仲, 等. 超重力强化氢氧化钾耦合甘氨酸钾溶液脱除密闭空间CO2的研究[J]. 中北大学学报(自然科学版), 2026, 47(4): 500-510. DOI: 10.62756/jnuc.issn.1673-3193.2025.12.0018.
Yuan Shixian, Yuan Zhiguo, Guo Zhong, et al. Study on the removal of CO2 in confined space by high⁃gravity enhanced potassium hydroxide coupled potassium glycinate solution[J]. Journal of North University of China(Natural Science Edition), 2026, 47(4): 500-510. DOI: 10.62756/jnuc.issn.1673-3193.2025.12.0018.
袁士贤, 袁志国, 郭仲, 等. 超重力强化氢氧化钾耦合甘氨酸钾溶液脱除密闭空间CO2的研究[J]. 中北大学学报(自然科学版), 2026, 47(4): 500-510. DOI: 10.62756/jnuc.issn.1673-3193.2025.12.0018. DOI:
Yuan Shixian, Yuan Zhiguo, Guo Zhong, et al. Study on the removal of CO2 in confined space by high⁃gravity enhanced potassium hydroxide coupled potassium glycinate solution[J]. Journal of North University of China(Natural Science Edition), 2026, 47(4): 500-510. DOI: 10.62756/jnuc.issn.1673-3193.2025.12.0018. DOI:
密闭空间进出口受限, 通风不良, 内部人员呼吸会持续产生CO
2
, 而这种环境下低分压CO
2
吸收传质推动力小, 且传统有机胺吸收剂腐蚀性强、 易挥发产生刺激性气体, 因此开发吸收效果优良且安全环保的绿色高效CO
2
吸收剂至关重要。本文将氢氧化钾(KOH)和甘氨酸钾(GlyK)混合溶液作为复合吸收剂, 在鼓泡反应器和超重力反应器条件下开展了低体积分数CO
2
(模拟密闭空间实际体积分数)吸收实验, 系统评估了吸收剂浓度、 反应温度等影响因素对吸收效果的作用规律, 并分析了GlyK的加入对吸收速率、 吸收负荷以及脱除率的影响。实验结果表明, 在常温常压下, GlyK的加入显著提升了低浓度CO
2
的吸收效果。相较于单一KOH溶液, 在鼓泡反应器中, 复合吸收剂脱除率提高了10%, 吸收负荷提高了208%; 在超重力条件下, KOH溶液的脱除率提高了20百分点, 可将CO
2
体积分数吸收至500×10
-6
; 吸收负荷为0.105 5 mol·mol
-1
, 提高了173%。本文提出的复合吸收剂吸收效率高且绿色环保, 综合评估其吸收效果, 可大幅提升潜艇、 航天器等密闭环境的生命保障效率, 通过绿色循环降低能耗, 延长生存与任务周期, 同时为应对气候变化提供了技术储备。
In a confined space, the breathing of personnel will continu
ously produce CO
2
. In this environment, the partial pressure of CO
2
is low, which results in a small driving force for absorption mass transfer. Moreover, traditional organic amine absorbents are highly corrosive and volatile, producing an irritating odor. Therefore, it is crucial to develop a green and efficient CO
2
absorbent with excellent absorption performance and safety and environmental protection. In this paper, a mixed solution of potassium hydroxide (KOH) and potassium glycinate (GlyK) was used as a composite absorbent to conduct low volume fraction CO
2
(simulating the actual volume fraction in a closed space) absorption experiments under bubble column and high-gravity reactor conditions. The effects of factors such as absorbent concentration and reaction temperature on the absorption performance were systematically evaluated. The influence of GlyK addition on the absorption rate, absorption capacity and removal rate was analyzed. The experimental results show that at normal temperature and pressure, the addition of GlyK significantly enhances the absorption effect of low-concentration CO
2
: compared with the single KOH solution, in the bubble reactor, the removal rate of the composite absorbent increases by 10%, and the absorption load increases by 208%; under the high-gravity condition, the removal rate of the KOH solution increases by 20 percentage points, and the CO
2
volume fraction can be absorbed to 500×10
-6
; the absorption load is 0.105 5 mol·mol
-1
, increasing by 173%. This study proposed a composite absorbents with high absorption efficiency and environmental friendliness. A comprehensive evaluation of its absorption performance can significantly enhance life support efficiency in enclosed environments such as submarines and spacecraft, reduce energy consumption through green recycling, extend survival and mission durations, and provide technical reserves for addressing climate change.
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