共搜索到456条信息，每页显示10条信息，共46页。用时：0小时0分0秒298毫秒
Influences of Platinum Precursors and Solution Acidities on REO-Based Catalysts Performances张爱敏,宁平摘 要:<正>Important effects exist between precious metals and rare earths oxides in three-way catalyst, especially the coordinated effects. These effects were studied by using H2PtCl6, Pt(NH3)2(NO2)2 and Pt(OH)2(C2H5ONH2)2 as Pt precursors, and the mixed......
for flue gas denitrification in glass furnace. Regeneration of the deactivated TiO2-ZrO2-CeO2 /Al2TiO 5 -TiO2-SiO2 (ATS) complex phase ceramics catalysts used for NH3 -SCR of NO x in glass furnace......
adsorption isotherms and NH3 temperature programmed desorption, tetragonal phase of CexZr1–xO2 was proposed as the active phase in which CeO2 and ZrO2 catalyzed synergistically the DIPE hydration......
Novel promoting effects of cerium on the activities of NOx reduction by NH3 over TiO2-SiO2-WO3 monolith catalysts房志涛1,林涛1,徐海迪1,吴干学1,孙萌萌1,陈耀强1,2,31. Key Laboratory of Green Chemistry & Technology... TiO2-SiO2-WO3 and used for the selective catalytic reduction of NOx by NH3. The experimental results showed that the selective catalytic reduction(SCR) performance and SO2-resistant ability of TiO2-SiO2-WO3......
Influence of calcination temperature on selective catalytic reduction of NOx with NH3 over CeO2-ZrO2-WO3 catalyst李军燕1,宋忠贤1,宁平1,张秋林1,刘昕1,李昊1,黄真真21. Faculty of Environmental Science and Engineering... for the selective catalytic reduction(SCR) of NO with NH3 were prepared by hydrothermal method. The influence of calcination temperature on the catalytic activity, microstructure, surface acidity and redox......
以丙三醇为还原剂的沉淀转化法制备超细银粉陈建波,李启厚,李玉虎,刘智勇,刘志宏中南大学冶金与环境学院摘 要:在水-PVP体系中,以氧化银(Ag2O)为前驱体,丙三醇为还原剂,采用沉淀转化法制备超细银粉.借助扫描电镜(SEM),X射线衍射(XRD),激光粒度分析等表征手段,研究氧化银转化生成银粉的机理及银粉的形貌与粒度控制规律.结果表明:银粉形成机理为Ag2O溶解和Ag+还原再结晶,为确保Ag2O完全还原,Ag2O/丙三醇摩尔比应小于或等于3:1;添加氨有利于制备粒度均匀,无团聚的类球形银粉,丙三醇浓度对银粉粒度的影响较大.在温度为80℃,Ag2O与丙三醇摩尔比为2:1,采用NH3·H2O为pH值调节剂,丙三醇浓度为2.4 mol/L,且其加料速度为6 mL/min,PVP添加量为Ag2O质量的1%的条......
="ChDivSummary">Commercial activated carbons were modified by a series of chemical or physical treatments using H2O2, NH3, and heating under N2 flow without notably changing their pore structures. The resultant......
MnOx-FeOy/TiO2-ZrO2-CeO2低温选择性催化还原NOz和抗毒性研究张晴1,贺拴玲1,张铮2,汪莉11. 北京科技大学能源与环境工程学院2. 北京科技大学材料科学与工程学院摘 要:用溶胶凝胶法制备TiO2-ZrO2-CeO2(摩尔比4∶1∶1.25)载体,柠檬酸溶液浸渍法进一步负载MnOx及MnOxFe Oy,进而合成了一种Fe掺杂的新型Mn基复合氧化物催化剂,考察其NH3选择性催化还原NO性能及抗硫性能.它在含硫氛围中有良好的低温选择性催化还原(SCR)能力和抗中毒能力,Fe的引入促进了Mn与TiO2-ZrO2-CeO2载体之间的相互作用,增加了催化剂表面Lewis酸性位点的数量.根据X射线光谱分析,Mn4+,Ce4+和吸附的氧的含量明显增加,对提高催化剂的性能非常有利.根据热重分析......
Preparation and optical properties of Y2O3/SiO2 powderSHEN Xiaoyi and ZHAI Yuchun School of Materials and Metallurgy,Northeastern University,Shenyang 110819,China摘 要:Y(NO3)3 and NH3·H2O were used as a raw materials,and nano-Y2O3 powder was successfully synthesized by a precipitation method.Employing TEOS as a raw material,SiO2 powder was successfully......
钯-硫脲-碘酸钾体系极谱络合吸附波及其应用杜芳艳,张亚,邓保炜,王星榆林学院化学与化工学院摘 要:钯(Ⅱ)-硫脲-碘酸钾络合物在pH8.20 NH3.H2O-NH4Cl缓冲溶液中有一灵敏的吸附波,峰电位在-0.42 V(vs.SCE)左右,该波的二阶导数峰峰电流与钯质量浓度在0.60~2.20μg/L范围内呈线性关系(r=0.998 8),检出限为0.30μg/L.经多种电化学方法证明,该吸附波为络合物吸附波,其电极过程为不可逆过程.考察了多种离子对峰电流Ip’’的影响.当测定0.1μg/L钯溶液时除Mo(......
