کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6478720 1428099 2017 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Using 13X, LiX, and LiPdAgX zeolites for CO2 capture from post-combustion flue gas
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
Using 13X, LiX, and LiPdAgX zeolites for CO2 capture from post-combustion flue gas
چکیده انگلیسی


- We synthesized a novel adsorbent named LiPdAgX zeolite.
- CCS was proposed from microstructure, selectivity and separation factor of zeolite.
- The static and flowing adsorption using CO2/N2 mixture on X zeolites were studied.
- LiPdAgX zeolite required less energy for regeneration compared to 13X and MEA.
- LiPdAgX zeolite can effectively capture CO2 from post-combustion flue gas.

This work investigates the application of X zeolites for capturing CO2 from post-combustion flue gas. LiX and LiPdAgX zeolites were prepared by an ion-exchange method using 13X zeolite. X-ray diffraction analysis showed that all samples exhibited characteristic peaks of X zeolites, where the peak intensities increased in the order: LiPdAgX > LiX > 13X. The enhanced intensity of the diffraction peaks can increase the activity of the X zeolites and improve their adsorption performance. Scanning electron microscopy imaging showed that the intergranular pore canals of LiPdAgX zeolite were more concentrated. Pore structure analysis indicated that addition of Li+ to the 13X zeolite enhanced the specific surface areas and pore volumes of the zeolites. Among the 13X, LiX, and LiPdAgX zeolites, LiPdAgX showed the highest CO2/N2selectivity, where the difference in the CO2 adsorption capacity was due to differences in the number of adsorption sites and thermal conductivities of the X zeolites. The CO2 breakthrough time increased in succession for the 13X, LiX, and LiPdAgX zeolites. The CO2/N2 separation factor of the LiPdAgX zeolite was twice that of the 13X zeolite at a CO2 concentration of 20 vol.%. The temperature variations during the adsorption process were used to determine the regeneration energy and adsorption capacity of the X zeolites. LiPdAgX zeolite required less energy for regeneration than 13X zeolite and MEA. After regeneration, the separation factor of LiPdAgX zeolite remained at 6.38 for 20 vol.% CO2 in the flue gas. Therefore, LiPdAgX zeolite can effectively capture CO2 from post-combustion flue gas to curtail the release of CO2 into the atmosphere.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 191, 1 April 2017, Pages 87-98
نویسندگان
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