The copper based catalysts, CuO/T-Al2O3, CuO/y-Al2O3-cordierite （Cord） and CuO/Cord, were prepared by impregnation method. The catalytic activity of the catalysts was tested in absence and presence of water vapor,an...The copper based catalysts, CuO/T-Al2O3, CuO/y-Al2O3-cordierite （Cord） and CuO/Cord, were prepared by impregnation method. The catalytic activity of the catalysts was tested in absence and presence of water vapor,and the catalysts were characterized. Temperature program desorption （TPD） experiments or toluene and water on the catalysts were carried out. The influence of water vapor on the activity of the catalysts was discussed. Results showed that addition of the water vapor has a significant negative effect on the catalytic activity of the catalysts.The higher the concentration of the Water vapor in feed steam was, the lower the catalytic activity of the copper based catalysts became, which could be mainly ascribed to the competition of water molecules with toluene molecules for adsorption on the catalyst surfaces. TPD experiments showed that the strength of the interaction between water molecules and three catalysts followed the order： CuO/γ-Al2O3〉CuO/γ-Al2O3-Cord〉CuO/Cord. As a consequence of that, the degree of degradation in the catalytic activity of these three catalysts by the water vapor followed the order： CuO/γ-Al2O3〉CuO/y-Al2O3-Cord〉CuO/Cord. However, the negative effect of the water vapor was reversible.展开更多
In ITER test blanket module design, the elucidation of tritium recovery from solid tritium breeding material is one of critical issues and Li2TiO3 is a candidate of tritium breeding materials. In the present study, in...In ITER test blanket module design, the elucidation of tritium recovery from solid tritium breeding material is one of critical issues and Li2TiO3 is a candidate of tritium breeding materials. In the present study, in order to understand tritium behavior in solid breeding material Li2TiO3, the X-ray photoelectron spectroscopy （XPS） and thermal desorption spectroscopy （TDS） experiments are carried out to elucidate the trapping behavior using 3 keV D2^＋ implanted sample. The Ti-2p XPS spectrum shows that a shoulder appeared at the lower energy side as increasing ion fluence, and it was suggested that Ti^3＋ was formed by the reduction of Ti^4＋.展开更多
基金Supported by the National-Natural Science Foundation of China （20936001）, the Natural Science Foundation of Guangdong Province, and the State Key Lab of Subtropical Building Science, South China University of Technology （x2yj C709028Z）.
文摘The copper based catalysts, CuO/T-Al2O3, CuO/y-Al2O3-cordierite （Cord） and CuO/Cord, were prepared by impregnation method. The catalytic activity of the catalysts was tested in absence and presence of water vapor,and the catalysts were characterized. Temperature program desorption （TPD） experiments or toluene and water on the catalysts were carried out. The influence of water vapor on the activity of the catalysts was discussed. Results showed that addition of the water vapor has a significant negative effect on the catalytic activity of the catalysts.The higher the concentration of the Water vapor in feed steam was, the lower the catalytic activity of the copper based catalysts became, which could be mainly ascribed to the competition of water molecules with toluene molecules for adsorption on the catalyst surfaces. TPD experiments showed that the strength of the interaction between water molecules and three catalysts followed the order： CuO/γ-Al2O3〉CuO/γ-Al2O3-Cord〉CuO/Cord. As a consequence of that, the degree of degradation in the catalytic activity of these three catalysts by the water vapor followed the order： CuO/γ-Al2O3〉CuO/y-Al2O3-Cord〉CuO/Cord. However, the negative effect of the water vapor was reversible.
文摘In ITER test blanket module design, the elucidation of tritium recovery from solid tritium breeding material is one of critical issues and Li2TiO3 is a candidate of tritium breeding materials. In the present study, in order to understand tritium behavior in solid breeding material Li2TiO3, the X-ray photoelectron spectroscopy （XPS） and thermal desorption spectroscopy （TDS） experiments are carried out to elucidate the trapping behavior using 3 keV D2^＋ implanted sample. The Ti-2p XPS spectrum shows that a shoulder appeared at the lower energy side as increasing ion fluence, and it was suggested that Ti^3＋ was formed by the reduction of Ti^4＋.
