Synthesis and Characterization of Porous Benzimidazole-Linked Polymers and Their Performance in Small Gas Storage and Selective Uptake

被引:424
作者
Rabbani, Mohammad Gulam [1 ]
El-Kaderi, Hani M. [1 ]
机构
[1] Virginia Commonwealth Univ, Dept Chem, Richmond, VA 23284 USA
关键词
carbon dioxide capture; hydrogen storage; gas separation; porous polymers; natural gas purification; METAL-ORGANIC FRAMEWORKS; CARBON-DIOXIDE CAPTURE; ZEOLITIC IMIDAZOLATE FRAMEWORKS; CO2; CAPTURE; HYDROGEN STORAGE; INTRINSIC MICROPOROSITY; ADSORPTION PROPERTIES; ENERGY APPLICATIONS; COUPLING REACTIONS; SOLID SORBENTS;
D O I
10.1021/cm300407h
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Porous organic polymers containing nitrogen-rich building units are among the most promising materials for selective CO2 capture and separation which can have a tangible impact on the environment and clean energy applications. Herein we report on the synthesis and characterization of four new porous benzimidazole-linked polymers (BILPs) and evaluate their performance in small gas storage (H-2, CH4, CO2) and selective CO2 binding over N-2 and CH4. BILPs were synthesized in good yields by the condensation reaction between aryl-o-diamine and aryl-aldehyde building blocks. The resulting BILPs exhibit moderate surface area (SA(BET) = 599-1306 m(2) g(-1)), high chemical and thermal stability, and remarkable gas uptake and selectivity. The highest selectivity based on initial slope calculations at 273 K was observed for BILP-2: CO2/N-2 (113) and CO2/CH4 (17), while the highest storage capacity was recorded for BILP-4: CO2 (24 wt % at 273 K and 1 bar) and H-2 (2.3 wt % at 77 K and 1 bar). These selectivities and gas uptakes are among the highest by porous organic polymers known to date which in addition to the remarkable chemical and physical stability of BILPs make this class of material very promising for future use in gas storage and separation applications.
引用
收藏
页码:1511 / 1517
页数:7
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