| 초록 |
The mesoporous molecular sieve with wormhole framework structure denoted HMS was synthesized, using alkylamine as the structure director. We studied the CO2 adsorption performance of as-prepared HMS because the surfactant was supposed to have an adsorption capacity of CO2. At 25℃, we got a capacity of 34mg/g and the capacity decreased with the temperature increasing. After removing the surfactant, we impregnated PEI(polyethylenimine) and TEPA( tetraethylene pentamine) on the mesoporous material and used them for the CO2 adsorption test. At same loading amount, TEPA/HMS always showed better performance than that of PEI work. Both of them gave best results at 90℃ when using high purity CO2 for the test, whereas these hybrid materials were not stable enough for prolonged operation at this temperature. They were very stable within 4 runs when we did the cyclic experiment at 75℃. The highest CO2 adsorption capacity appeared at lower temperature when we used 5% CO2 for the test which was due to the partial pressure decreasing of CO2. The capacity was no big difference when we compared it with that for high purity CO2 at 75℃. This good performance in diluted CO2 will be very useful for the practical application. |
