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由钙基膨润土直接合成钛柱撑膨润土 被引量:7
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作者 曲济方 赵永杰 +1 位作者 马建新 林裕 《硅酸盐学报》 EI CAS CSCD 北大核心 2007年第8期1103-1109,共7页
以钙基膨润土为原料,未经钠化处理,直接以四氯化钛、丙三醇组成的钛柱撑剂,在水热条件下制备了钛柱撑膨润土(titanium pillared clay,Ti-PILC)。探讨了制备Ti-PILC的工艺参数对其结构性能的影响。筛选出最佳工艺参数为:悬浮液浓度为5%,... 以钙基膨润土为原料,未经钠化处理,直接以四氯化钛、丙三醇组成的钛柱撑剂,在水热条件下制备了钛柱撑膨润土(titanium pillared clay,Ti-PILC)。探讨了制备Ti-PILC的工艺参数对其结构性能的影响。筛选出最佳工艺参数为:悬浮液浓度为5%,钛土比为20mmol/g,140℃水热合成3h。所得Ti-PILC层间距达1.962nm,比表面积186m2/g。在500℃以下具有良好的热稳定性。光催化显示:该Ti-PILC在紫外光照射下能持续稳定地生成羟基自由基,适于低浓度甲基橙的降解,而经钾离子修饰过的催化剂更适于高浓度降解。 展开更多
关键词 钙基膨润土 钛柱撑剂 水热合成 膨润土
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Resistance to SO_2 poisoning of V_2O_5/TiO_2-PILC catalyst for the selective catalytic reduction of NO by NH_3 被引量:4
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作者 臧思淼 张桂臻 +3 位作者 邱文革 宋丽云 张然 何洪 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第6期888-897,共10页
A titania pillared interlayered clay(Ti-PILC) supported vanadia catalyst(V2O5/TiO2-PILC) was prepared by wet impregnation for the selective catalytic reduction(SCR) of NO with ammonia. Compared to the traditiona... A titania pillared interlayered clay(Ti-PILC) supported vanadia catalyst(V2O5/TiO2-PILC) was prepared by wet impregnation for the selective catalytic reduction(SCR) of NO with ammonia. Compared to the traditional V2O5/TiO2 and V2O5-MoO3/TiO2 catalysts, the V2O5/TiO2-PILC catalyst exhibited a higher activity and better SO2 and H2O resistance in the NH3-SCR reaction. Characterization using TPD, in situ DRIFT and XPS showed that surface sulfate and/or sulfite species and ionic SO4^(2-)species were formed on the catalyst in the presence of SO2. The ionic SO4^(2-) species on the catalyst surface was one reason for deactivation of the catalyst in SCR. The formation of the ionic SO4^(2-) species was correlated with the amount of surface adsorbed oxygen species. Less adsorbed oxygen species gave less ionic SO4^(2-) species on the catalyst. 展开更多
关键词 Selective catalytic reduction TiO2-pillared clay Nitrogen oxide Vanadia catalyst In situ diffuse reflectance infrared Fourier transform spectroscopy
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