Preparation and Characterization of BaTiO3-BaAl2O4-Al2O3 Composite Support and Catalytic Performance of Its Nickel-Based Catalyst for CO2 Reforming of Methane
Preparation and Characterization of BaTiO3-BaAl2O4-Al2O3 Composite Support and Catalytic Performance of Its Nickel-Based Catalyst for CO2 Reforming of Methane
复制标题
BaTiO3-BaAl2O4-Al2O3复合载体的制备、表征及其镍基催化剂对甲烷CO2重整的催化性能
DOI：
10.3724/sp.j.1088.2012.10505
复制
发表时间：
2013-01
影响因子：
16.5
通讯作者：
Yang Chunyan
中科院分区：
文献类型：
--
作者：
Hu Quanhong;Li Xiancai;Yang Aijun;Yang Chunyan
以BaTiO_3为载体的镍基催化剂对二氧化碳甲烷重整反应具有较高的初活性。然而，BaTiO_3载体的比表面积太小，限制了其作为催化剂载体的应用。以十六烷基三甲基溴化铵为结构模板，采用溶胶-凝胶法制备了BaTiO_3-BaAl_2O_4-Al_2O_3复合载体。用X射线衍射仪、红外光谱、氮气吸附-脱附、透射电子显微镜和氢气程序升温还原等方法对BaTiO3-BaAl2O4-Al_2O_3复合材料进行了表征。考察了Ni/BaTiO_3-BaAl_2O_4-Al_2O_3催化剂在二氧化碳重整甲烷反应中的催化性能。结果表明，BaTiO_3-BaAl_2O_4-Al_2O_3复合载体具有多孔织构和高比表面积，在复合载体的内、外表面均存在BaTiO_3和BaAl_2O_4相，晶粒度在20~50 nm之间。复合载体的微孔尺寸为10~20 nm，复合载体表面同时存在BaTiO_3和BaAl_2O_4相，削弱了Ni/BaTiO_3-BaAl_2O_4-Al_2O_3催化剂中镍物种与γ-Al_2O_3之间的强相互作用，降低了形成尖晶石的可能性。在Ni/BaTiO_3-BaAl_2O_4-Al_2O_3催化剂上，当Ba含量为17.33%时，甲烷与CO_2重整制合成气的活性最高，稳定性最好。
Nickel-based catalyst supported on BaTiO3 possesses higher initial activity for carbon dioxide reforming of methane. However, the specific surface area of the BaTiO3 support is too small, and this restricts its application as a catalyst support. A BaTiO3-BaAl2O4-Al2O3 composite support was prepared by the sol-gel method using hexadecyltrimethylammonium bromide as the structure template. The Ba-TiO3-BaAl2O4-Al2O3 composite was characterized by X-ray diffraction, infrared spectroscopy, N2 adsorption-desorption, transmission electron microscopy, and H2 temperature-programmed reduction. The catalytic performance of the Ni/BaTiO3-BaAl2O4-Al2O3 catalyst was investigated by CO2 reforming of CH4. The results showed that the BaTiO3-BaAl2O4-Al2O3 composite support owns a porous texture and high specific surface area, the BaTiO3 and BaAl2O4 phases, whose crystalline size is in the range of 20–50 nm, exist on the inside and outside surface of the composite support in the form of crystalline particles. The size of micropores of the composite support is 10–20 nm, The presence of both BaTiO3 and BaAl2O4 phases on the surface of the composite support weakens the strong interaction between the nickel species and γ-Al2O3 of the Ni/BaTiO3-BaAl2O4-Al2O3 catalyst, and the possibility of the formation of NiAl2O4 spinel is decreased. The Ni/BaTiO3-BaAl2O4-Al2O3 catalyst with 17.33% Ba content shows the highest activity and excellent stability for CH4 reforming with CO2 to synthesis gas.
登录
查看更多内容
影响因子：
5.5
作者：
Luna, Adolfo E. Castro;Iriarte, Maria E.
通讯作者：
Iriarte, Maria E.
影响因子：
--
作者：
S. Soloviev;A. Kapran;S. Orlyk;E. V. Gubareni
通讯作者：
S. Soloviev;A. Kapran;S. Orlyk;E. V. Gubareni
影响因子：
--
作者：
Jian Huang;R. Ma;Tao Huang;A. Zhang;Wei Huang
通讯作者：
Jian Huang;R. Ma;Tao Huang;A. Zhang;Wei Huang
影响因子：
5.5
作者：
Bradford, MCJ;Vannice, MA
通讯作者：
Vannice, MA
影响因子：
7.3
作者：
ROSTRUPNIELSEN, JR;HANSEN, JHB
通讯作者：
HANSEN, JHB