Study on Carbon Capture Performance of Aluminum Nitrate Modified Calcium Gluconate-based Adsorbent

徐文婷1; 邓辽2; 苏鹏2; 刘磊2; 孙志强2

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Study on Carbon Capture Performance of Aluminum Nitrate Modified Calcium Gluconate-based Adsorbent

更新时间：2026-04-17

- Study on Carbon Capture Performance of Aluminum Nitrate Modified Calcium Gluconate-based Adsorbent
- Vol. 18, Pages: 1-8(2026)
- 作者机构：
  
  1. 1. 湘潭钢铁集团有限公司,湖南,湘潭,411101
  2. 中南大学能源科学与工程学院,长沙,410083
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：29 January 2026，
  
  Accepted：16 February 2026，
  
  Online First：17 April 2026，
  
  Published：2026
- 稿件说明：
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徐文婷1, 邓辽2, 苏鹏2, et al. Study on Carbon Capture Performance of Aluminum Nitrate Modified Calcium Gluconate-based Adsorbent[J/OL]. 2026, 181-8.
DOI：

徐文婷1, 邓辽2, 苏鹏2, et al. Study on Carbon Capture Performance of Aluminum Nitrate Modified Calcium Gluconate-based Adsorbent[J/OL]. 2026, 181-8. DOI：

摘要

高温钙基吸附剂因其原料储量丰富、操作温度宽和吸附能力强的优势，成为工业尾气CO2捕集的理想材料。然而，钙基吸附剂的主要问题是高温易失活，其吸附容量随着循环次数的增加而急剧衰减。为解决上述问题，首先采用葡萄糖酸钙作为钙基前驱体、硝酸铝作为改性材料制备CO2吸附剂，进而利用同步热分析仪探究其CO2捕集性能。实验结果表明：10%硝酸铝掺杂改性的葡萄糖酸钙吸附剂在CO2捕集/脱附循环中表现出良好的循环稳定性，第20次循环CO2捕集能力为8.92mmol/g，20个循环累积CO2捕集能力为194.9mmol/g。相比之下，未掺杂硝酸铝的葡萄糖酸钙吸附剂第20次循环CO2捕集能力和累积CO2捕集能力为7.39 mmol/g和206.9 mmol/g，而对于商业CaO，这2个数据分别为3.64mmol/g 和76.1mmol/g。值得注意的是，在100次CO2捕集/脱附循环实验中，10%硝酸铝掺杂改性的葡萄糖酸钙吸附剂在第100次循环中CO2捕集能力仍然可以达到7.83mmol/g，为纯CaO理论最大吸附量的43.84%。该实验结果有力证明了10%硝酸铝掺杂的葡萄糖酸钙基吸附剂优异的CO2吸附性能和抗烧结能力。

Abstract

High-temperature Ca-based sorbents are considered promising candidates for industrial flue-gas CO2 capture due to their abundant feedstocks

broad operating temperature window

and high uptake capacity. However

a key limitation of Ca-based sorbents is rapid deactivation at high temperatures

leading to a sharp decline in adsorption capacity with the increase in cyclic number. To address this issue

CO2 sorbents were prepared using calcium gluconate as the Ca-based precursor and aluminum nitrate as a modifying agent. Their CO2 capture performance was then evaluated by simultaneous thermal analysis. The results show that

the calcium gluconate sorbent doped with 10% aluminum nitrate exhibited good cyclic stability during repeated CO2 capture/regeneration. After 20 cycles

the CO2 capture capacity remained at 8.92 mmol/g

and the cumulative CO2 uptake over 20 cycles reached 194.9 mmol/g. In comparison

the undoped calcium gluconate sorbent delivered a CO2 capture capacity of 7.39 mmol/g at the 20th cycle

with a cumulative uptake of 206.9 mmol/g over 20 cycles. For commercial CaO

the corresponding values were 3.64 mmol/g and 76.1 mmol/g

respectively. Notably

in a 100-cycle CO2 capture/regeneration test

the 10% aluminum nitrate-modified calcium gluconate sorbent still achieved a CO2 capture capacity of 7.83 mmol/g at the 100th cycle

which corresponds to 43.84% of the theoretical maximum uptake of pure CaO. These findings provide strong evidence that calcium gluconate-based sorbents doped with 10% aluminum nitrate possess enhanced CO2 adsorption performance and improved resistance to sintering.

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references

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