摘要
以锐钛矿型纳米TiO_2为载体,浸渍负载过渡金属氧化物,制备NiO/TiO_2催化剂,并考察其脱硝性能。以计算量的Ni(NO_3)_2和Fe(NO_3)_3混合溶液浸渍纳米TiO_2粉末,室温下搅拌30 min至混合均匀,放入旋转蒸发器,70℃和0.08 MPa条件下至水分蒸干。在空气中,以不同的温度和时间焙烧,得到负载质量分数均为10%的NiO/TiO_2脱硝催化剂。XRD和TPR研究表明,高温会使锐钛矿型TiO_2向金红石型转化,NiO也会与TiO_2反应生成固熔体;而焙烧时间对催化剂结构影响不大。各催化剂样品对NO+CO反应都有较高的活性。
NiO/TiO2 catalyst was prepared by using anatase nanometer TiO2 as the supporter and being impregnated with transition metal oxides, and its denitrogenation properties was investigated using CO as the reducer. Nanometer TiO2 powder was dipped in mixed impregnation solution of Ni （NO3 ）2 and Fe（ NO3 ）3. The impregnation solution with TiO2 powder was stirred for 30 min at room temperature, and evaporated to dryness in rotatory evaporator at 70 ℃ and 0.08 MPa. A series of 10% NiO/TiO2 catalysts were obtained at different calcination temperature and calcination time in the air. The results of XRD and TPR characterization showed that anatase TiO2 could be transformed into rutile at high temperature;solid solution was formed owing to the reaction of NiO and TiO2. Calcination time had little effect on the catalyst structure. All of the catalyst samples exhibited high activity for the NO ＋ CO reaction.
出处
《工业催化》
CAS
2011年第1期23-26,共4页
Industrial Catalysis
基金
国家自然科学基金(21076025)
