L-精氨酸溶剂化合成金属有机骨架化合物及其吸附CO2的性能

采用L-精氨酸对传统均苯三甲酸（BTC）溶剂热法合成的Cu基金属有机骨架化合物（Cu-BTC）进行改性，得到新型化合物（Cu-BTC-Arg），并通过固定床动态吸附实验考察了Cu-BTC-Arg和Cu-BTC吸附CO2的性能。表征结果显示：L-精氨酸只是辅助化溶剂，并未配位至Cu2+上；Cu-BTC-Arg比Cu-BTC具有更小的晶粒尺寸、更大的比表面积和微孔体积。实验结果表明，两种不同L-精氨酸加入量合成的Cu-BTC-Arg均在室温、烟气中无水蒸气、烟气流量80 mL/min的条件下CO2吸附量最大，吸附接近饱和时的CO2吸附量均为4.9 mmol/g，远高于Cu-BTC的CO2吸附量。Cu-BTC-Arg对CO2的吸附以物理吸附为主。

Synthesis of metal-organic framework compound using L-Arginine solvation and its adsorption capability to CO2

Cu based metal organic framework compound was synthesized by traditional solvothermal method with benzenetricarboxylic acid（BTC），which was named Cu-BTC. And a new compound was synthesized by Cu-BTC modification using L-arginine salvation，which was named Cu-BTC-Arg. The CO2 adsorption capacity of Cu-BTC-Arg and Cu-BTC was studied. The characterization results showed that：L-arginine does not coordinate with Cu2+，indicating that it is only used as auxiliary solvent；Compared with Cu-BTC，Cu-BTC-Arg had smaller grain size，larger specific surface area and greater micropore volume. The experimental results showed that：Under the conditions of room temperature，simulated flue gas without water vapor and flue gas flow 80 mL/min，two kinds of Cu-BTC-Arg synthesized with different L-arginine amount both had the largest CO2 adsorption capacity；The near-saturated CO2 adsorption capacity were both 4.9 mmol/g，which was much higher than that of Cu-BTC. The adsorption of CO2 on Cu-BTC-Arg was mainly physical adsorption.