高钛渣制备钙基沸石载体同步负载高活性Ti-V氧化物催化剂的资源化应用基础研究

项目名称： 高钛渣制备钙基沸石载体同步负载高活性Ti-V氧化物催化剂的资源化应用基础研究

项目编号： No.21207086

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 环境化学

项目作者： 周吉峙

作者单位： 上海大学

项目金额： 25万元

中文摘要： 实现"零废物排放"的清洁生产已经成为高钛渣资源化的发展趋势。基于高钛渣的Ti、Al、Si、Ca、V组分共存可利用性，本课题首次提出在高钛渣体系中调控形成Ca基沸石分子筛，并同步诱导高活性过渡金属氧化物催化剂负载的构想。为此，需要弄清高钛渣含Ti、V等矿相转变形成氧化物的溶解-新相成核-生长原理，研究高钛渣中Ca-Si-Al矿物相形成钙基沸石的化学过程与机制，明确过渡金属氧化物催化剂在Ca基沸石上负载的化学过程，探索得到Ca基沸石负载Ti-V氧化物催化剂的形成控制条件。并通过改变Si/Al组成调节孔径尺寸、表面吸附位提高沸石选择性吸附能力、调控Ca2+组分比例调节沸石表面酸碱位、诱导负载Ti-V氧化物形成高活性物相和表面等控变手段，强化催化剂对NOx污染物的光催化活性。本课题的研究成果对多组分共存的矿渣高附加值资源化利用具有科学参考价值和现实指导意义。

中文关键词： 高钛矿渣；二氧化钛；资源化利用；水热反应；光催化

英文摘要： Achievement of clean production with "zero waste discharging" has been the development trend of high titanium slag recycling. Based on the co-existence and availability of Ti, Si, Al, Ca, V components in the high titanium slag, this proposal for the first time conceives the controlling preparation of Ca-based zeolite with the synchronous induction of high activated metal oxide loading. For this purpose, the following work should be carried out that includes the study on the dissolution-new phase nucleation-growth principle of Ti, V bearing mineral phases transition to oxides in the slag, the investigation on the chemical formation process and mechanism from Ca-Si-Al mineral phase in slag to calcium-based zeolite, and the research on the chemical loading process of transition metal oxide catalyst on Ca-based zeolite. We attempt to obtain the controlling conditions for the preparation of Ca-based zeolite supported Ti-V oxide catalyst. Moreover, the photocatalytic activity of the catalyst to purify NOx contaminate is enhanced through the controlling methods including changing of pore size and surface adsorption site by Si/Al ratio to improve selective adsorption capacity of zeolite, adjusting acid-base site on zeolite surface by Ca2+ composition, and inducing the formation of phase and surface with high activity on

英文关键词： titanium bearing blast furnace slag；titania；recycle；hydrothermal treatment；photocatalysis