氧化镁基二氧化碳吸附剂的制备及改性研究进展
收稿日期: 2022-10-30
网络出版日期: 2023-08-25
基金资助
青海省基础研究计划项目(2022-ZJ-706);国家自然科学基金-区域创新发展联合基金项目(U22A20434)
Research progress of preparation and modification of MgO-based CO2 adsorbents
Received date: 2022-10-30
Online published: 2023-08-25
CO2浓度的增加会引起全球变暖、海平面上升和冰川融化等环境问题，因此开发CO2捕集技术刻不容缓。MgO作为一种理想的CO2吸附剂已成为研究热点。综述了MgO基CO2吸附剂的制备方法，探讨了不同方法对MgO的比表面积、CO2吸附容量和循环稳定性的影响。研究发现，采用沉淀法和溶胶-凝胶法制备的MgO具有更大的比表面积和更多的碱性位点，有效地提高了其捕集CO2的能力；采用熔盐掺杂改性法制备的MgO基吸附剂对CO2捕集能力显著提高，多次吸-脱附循环后仍保持较高的CO2吸附容量。未来对MgO基CO2吸附剂的研究主要集中在MgO的改性方法、工艺条件优化和捕集机制等方面，进而推进MgO基CO2吸附剂的工业化应用。
桂昌青 , 王雅静 , 凌长见 , 王怀有 , 唐忠锋 . 氧化镁基二氧化碳吸附剂的制备及改性研究进展[J]. 无机盐工业, 2023 , 55(8) : 77 -83 . DOI: 10.19964/j.issn.1006-4990.2022-0635
The increasing concentration of CO2 will cause environmental problems such as global warming，sea level rise and glacier melting，so it is urgent to develop CO2 capture technology.As an ideal CO2 adsorbent，MgO has become a research hotspot.The preparation methods of MgO-based CO2 adsorbents were reviewed，and the changes in MgO-specific surface area，CO2 adsorption capacity and cyclic stability prepared by different methods were discussed.It was found that the MgO prepared by precipitation and sol-gel methods had larger specific surface areas and more alkaline sites，which effectively improved its ability to capture CO2.The CO2 capture ability of MgO-based adsorbents prepared by the molten salt doping modification method was significantly improved，and the CO2 adsorption capacity was still high after repeated adsorption and desorption cycles.In the future，the research on MgO-based CO2 adsorbents would mainly focus on the modification methods，process conditions optimization and capture mechanism of MgO，so as to promote the industrial application of MgO-based CO2 adsorbents.
Key words： CO2; MgO; adsorbent; molten salts
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