【摘要】 制备了载钯的超稳Y型（USY）分子筛材料Pd/USY,并组合其它贱金属进行改性,得到系列二元与多元改性Pd/USY;利用N₂物理吸附仪、高分辨透射电子显微镜（TEM）、热重分析（TG）仪、化学吸附仪和X射线衍射（XRD）仪等,表征分析了系列改性Pd/USY分子筛对甲苯的吸附与脱附性能。结果表明,改性后的Pd-Ce-Zr/USY分子筛吸附性能最好,甲苯饱和吸附量高达290.7 mg/g,甲苯高温脱附温度范围为290～360℃,其最佳改性条件为钯负载质量分数为1%,pH值调节至8,煅烧温度为450℃。更多还原

【Abstract】 The palladium-loaded ultrastable Y molecular sieve, Pd/USY and binary and multi-component modified Pd/USY by introducing other base metals were prepared. The adsorption and desorption of toluene on the modified Pd/USY molecular sieves was characterized by N₂ physical adsorption, high resolution transmission electron microscopy（TEM）, thermo gravimetric analysis（TG）, chemical adsorption and X-ray diffraction（XRD）. The results showed that the modified molecular sieve Pd-Ce-Zr/USY had the highest adsorption capacity, and that its saturated adsorption capacity of toluene was up to 290.7 mg/g. The high temperature desorption temperature range of toluene was 290 to 360℃. The optimum modification conditions are: 1% of palladium loading, a pH of 8, and 450℃ of calcination temperature.更多还原