CuAl-LDH/HNT复合改性材料及其二氧化碳吸附性能研究

IF 2.4 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2025-08-22 DOI:10.1002/jctb.70045

Yulan Zhu, Yao Zhou, Weifeng Gong, Tongtong Tang

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引用次数: 0

摘要

在各种CO2捕集技术中，固体吸附已成为应用最广泛的方法。此外，有机胺改性固体吸附剂可以进一步提高其CO2吸附性能，具有广阔的应用前景。结果以酸处理过的高岭土（HNT）为底物，采用共沉淀法合成了CuAl-LDH/HNT复合材料。以3-氨基丙基三乙氧基硅烷（APTES）为改性剂，成功合成了xAPTES CuAl-LDH/HNT复合吸附剂。研究发现，调整CuAl-LDH、HNT和APTES的复合比例可以充分利用材料间的协同效应，从而影响其CO2吸附性能。其中，当CuAl-LDH与HNT的比例为2:1，APTES的负荷量为30% wt%时，复合材料的性能最佳。材料的吸附性能和可再生性测试结果表明，30APTES-LDH/HNT静态吸附24 h后的吸附容量为4.38 mmol/g， 6次循环后的再生效率保持在92%以上。通过动力学模型拟合材料的吸附过程，发现化学吸附是主要的吸附过程，吸附前后的红外光谱对比也清楚地显示了改性材料性能的提高。结论合成的aptes功能化CuAl-LDH/HNT吸附剂具有显著的吸附能力和良好的可回收性，具有较大的工业捕集潜力。©2025化学工业学会（SCI）。

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Study on composite modification of CuAl-LDH/HNT materials and their carbon dioxide adsorption performance

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Study on composite modification of CuAl-LDH/HNT materials and their carbon dioxide adsorption performance

Background

Among various CO₂ capture technologies, solid adsorption has become the most widely used method. In addition, organic amine modified solid adsorbents can further improve their CO₂ adsorption performance and have broad application prospects.

Result

CuAl-LDH/HNT composite material was synthesized via the co-precipitation method by using acid-treated halloysite (HNT) as one of the substrates. Further, the xAPTES CuAl-LDH/HNT composite adsorbent was successful synthesized by using 3-aminopropyltriethoxysilane (APTES) as modifier. It was found that adjusting the composite ratio of CuAl-LDH, HNT, and APTES can fully utilize the synergistic effect between materials, thereby affecting their CO₂ adsorption performance. Especially, when the ratio of CuAl-LDH to HNT was 2:1 and the loading amount of APTES was 30 wt%, the performance of the composite material was optimal. The adsorption performance and regenerability test results of the material showed that the adsorption capacity of 30APTES-LDH/HNT was 4.38 mmol/g after static adsorption for 24 h, and maintained over 92% regeneration efficiency after 6 cycles. By fitting the adsorption process of the material with a kinetic model, it was found that chemical adsorption was the main process, and the comparison of infrared spectra before and after adsorption also clearly showed the improved performance of the modified material.

Conclusion

Remarkable adsorption capacity and good recyclability suggest that synthesized APTES-functionalized CuAl-LDH/HNT adsorbents have high potential for CO₂ capture in industry. © 2025 Society of Chemical Industry (SCI).

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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.