Citation:
ZUO Chen-sheng, Zhou Si-yu, SUN Cheng-zhi, WANG Xing-zhi, LIU Dao-sheng, SEO Hwi-min, PARK Yong-ki, GUI Jian-zhou, LIU Dan. Preparation and application of magnesium-based CO2 sorbent for temperature swing absorption I.Na/Mg mol ratio[J]. Journal of Fuel Chemistry and Technology,
;2014, 42(7): 884-889.
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A series of magnesium-based CO2 absorbents with different Na/Mg molar ratios were prepared by precipitation method with Mg(NO3)2 and Na2CO3 as raw materials, and characterized by various methods (including XRD, SEM-EDS and DTG) to study the compositions, morphology and decomposition temperature and so on. The CO2 absorption performance was evaluated by temperature swing absorption-desorption dynamic cyclic tests to check the impact of Na/Mg molar ratio. It can be seen that optimum molecular ratio of Na to Mg is 8.15, and the sorbents is homogeneous with lower decomposition temperature caused by small particles of the sample, and initial CO2 adsorption capacity can reach 9.584%. Good recycling capability can be obtained as well. Compared with the initial absorption capacity, there was only 4.2% decrease after 20 recycles.
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Keywords:
- magnesium-based absorbent,
- CO2,
- temperature swing absorption
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