| Summary: | 碩士 === 國立中央大學 === 化學研究所 === 95 === The thesis is divided into two parts. First, adsorption of the organic sulfur compounds thiophene (TP) by zeolites which were ion exchanged either by vapor phase ion exchange (VPIE) or liquid phase ion exchange (LPIE). The adsorptions were studied in a fixed-bed adsorber operated at ambient temperature and pressure. The vapor phase ion exchange method can effectively exchange cation with the proton in zeolite more than liquid phase ion exchange method. The adsorbability tests for surfur adsorption capacity at breakthrough follow the order Cu(I)-Ferrierite < Cu(I)-Mordenite < Cu(I)-CaX < Cu(I)-ZSM-5 < Cu(I)-Beta < Cu(I)-Y. After adsorption, some zeolites have color changed due to polymerization of thiohpene. Besides zeolite, mesoporse SBA-15 was also used to adsorb thiophene but it can not adsorb thiophene.
In the second part of the thesis, the critical role of silica precursors in the synthesis of the cubic SBA-1 mesophase under strongly acidic condition at different synthesis temperatures has been investigated. The present of higher concentration of corresponding alcohol due to the hydrolysis of silica precursors, which effectively serve as cosolvent or as cosolution to interference the surfactant parking parameter, is a key factor for mesoporous to shape up. Further, we also used TMOS as main silica precursor to synthesis SBA-1 and then tested the thermal stability and boiling water stability of it. At the thermal stability part, the heat-resistant of SBA-1 can stand at least 1123K and still have the pore surface 642 m2/g. At the boiling water stability part, TMOS can stand at least four hours and without decrease the intensity of XRD and is better than using TEOS as silica precursor.
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