Ni based catalyst supported on KIT-6 silica for CO methanation: Confinement effect of three dimensional channel on NiO and Ni particles
Ni based catalyst supported on KIT-6 silica for CO methanation: Confinement effect of three dimensional channel on NiO and Ni particles
复制标题
KIT-6二氧化硅负载镍基催化剂用于CO甲烷化：三维通道对NiO和Ni颗粒的限制作用
DOI：
10.1016/j.micromeso.2017.06.022
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发表时间：
2018-05
影响因子：
5.2
通讯作者：
Zhicheng Bian
中科院分区：
文献类型：
--
作者：
Yuhao Lv;Zhong Xin;Xin Meng;Miao Tao;Zhicheng Bian
采用等体积浸渍法制备了以SiO_2 KIT-6为载体的几种镍催化剂，并在连续流动固定床反应器中考察了它们在CO甲烷化反应中的催化性能。介孔二氧化硅KIT-6具有三维骨架和较大的比表面积，可以为金属的分散提供足够的位置。镍负载量对金属表面积和镍颗粒在载体上的分散度有显著影响。镍负载量较高的催化剂具有较好的CO甲烷化活性。与Al_2O_3、SiO_2甚至介孔SBA-15相比，KIT-6 SiO_2在不同焙烧温度下，由于NiO颗粒的大小保持一致，对NiO颗粒有明显的限制作用。然而，在较高的温度下，金属镍颗粒由于Ostwald熟化效应而烧结，导致载体的孔堵塞，进而导致催化剂失活。
Several nickel catalysts supported on silica KIT-6 were synthesized via the incipient wetness impregnation method and the performance of the catalysts in CO methanation were investigated in a continuous flow fixed bed reactor. The mesoporous silica KIT-6 has three dimensional framework and large surface area, which can offer adequate sites for the metal to disperse. The amount of nickel loading has significantly affected the metal surface area and dispersion of nickel particles on the support. The catalysts with higher Ni loading exhibited better activity in CO methanation. It was also found that, compared with Al2O3, SiO2and even meseporous SBA-15, KIT-6 silica has an obvious confinement effect to NiO particles as the size of NiO particles maintained consistent under different calcination temperature. However, at higher temperature, metallic nickel particles sintered due to the Ostwald ripening effect, which caused the pore blocking of the support and further led to the deactivation of the catalysts.
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影响因子：
4.2
作者：
Jiaying Zhang;Z. Xin;Xin Meng;Yuhao Lv;M. Tao
通讯作者：
Jiaying Zhang;Z. Xin;Xin Meng;Yuhao Lv;M. Tao
影响因子：
7.2
作者：
Yan, Xiaoliang;Liu, Yuan;Liu, Chang-jun
通讯作者：
Liu, Chang-jun
影响因子：
5.5
作者：
Li, GH;Hu, LJ;Hill, JM
通讯作者：
Hill, JM
影响因子：
7.3
作者：
S. Simonsen;I. Chorkendorff;S. Dahl;M. Skoglundh;J. Sehested;S. Helveg
通讯作者：
S. Simonsen;I. Chorkendorff;S. Dahl;M. Skoglundh;J. Sehested;S. Helveg
碳化硅负载镍催化剂上 CO 加氢合成天然气
影响因子：
7.5
作者：
Yu Yue;Jin Guoqiang;Wang Yingyong;Guo Xiangyun
通讯作者：
Guo Xiangyun