Sodium Y(Na Y) zeolite is a promising adsorbent for carbon capture.The template-free synthesis of Na Y zeolite has gained considerable interests to minimize its costs and environmental effects.However,Na Y zeolites sy...Sodium Y(Na Y) zeolite is a promising adsorbent for carbon capture.The template-free synthesis of Na Y zeolite has gained considerable interests to minimize its costs and environmental effects.However,Na Y zeolites synthesized through template-free methods exhibited lower CO_(2) adsorption capacities(~4.07 mmol·g^(-1)) compared to template-assisted counterparts,often requiring longer crystallization time and higher energy penalty.This study systematically compared the microstructural characteristics and CO_(2) adsorption performance of Na Y zeolites synthesized with and without templates,including those from the commercial markets.Through process optimization,the CO_(2) adsorption capacity of the template-free Na Y zeolite was significantly enhanced,surpassing those template-assisted samples.Notably,it achieved CO_(2) adsorption capacities of 6.51 mmol·g^(-1) at 25℃ and 0.1 MPa,and 7.40 mmol·g^(-1) at 0℃ and 0.1 MPa,outperforming both commercial Na Y and template-assisted samples.The structural differences,including crystal integrity,pore size distribution and surface properties,were systematically discussed.The optimized synthesis method increased the specific surface area and the ratio of microporous structures.The template-free Na Y also showed superior CO_(2) capture capacity,moisture resistance,breakthrough performance and stability,indicating its application potential for carbon capture.展开更多
基金the financial support from the Selfdeployed Projects (E355F002 and E355F005) of Ganjiang Innovation Academyfinancial support by Bureau of Science and Technology,Taiyuan,entitled “the enrichment of coal bed methane using novel adsorbents via pressure swing adsorption”。
文摘Sodium Y(Na Y) zeolite is a promising adsorbent for carbon capture.The template-free synthesis of Na Y zeolite has gained considerable interests to minimize its costs and environmental effects.However,Na Y zeolites synthesized through template-free methods exhibited lower CO_(2) adsorption capacities(~4.07 mmol·g^(-1)) compared to template-assisted counterparts,often requiring longer crystallization time and higher energy penalty.This study systematically compared the microstructural characteristics and CO_(2) adsorption performance of Na Y zeolites synthesized with and without templates,including those from the commercial markets.Through process optimization,the CO_(2) adsorption capacity of the template-free Na Y zeolite was significantly enhanced,surpassing those template-assisted samples.Notably,it achieved CO_(2) adsorption capacities of 6.51 mmol·g^(-1) at 25℃ and 0.1 MPa,and 7.40 mmol·g^(-1) at 0℃ and 0.1 MPa,outperforming both commercial Na Y and template-assisted samples.The structural differences,including crystal integrity,pore size distribution and surface properties,were systematically discussed.The optimized synthesis method increased the specific surface area and the ratio of microporous structures.The template-free Na Y also showed superior CO_(2) capture capacity,moisture resistance,breakthrough performance and stability,indicating its application potential for carbon capture.
