Preparation of high-surface-area Ni/alpha-Al2O3 catalysts for improved CO methanation
Preparation of high-surface-area Ni/alpha-Al2O3 catalysts for improved CO methanation
复制标题
用于改善CO甲烷化的高比表面积Ni/α-Al2O3催化剂的制备
DOI：
10.1039/c4ra13634a
复制
发表时间：
2015
期刊：
影响因子：
3.9
通讯作者：
Su Fabing
中科院分区：
文献类型：
--
作者：
Liu Youjun;Gao Jiajian;Liu Qing;Gu Fangna;Lu Xiaopeng;Jia Lihua;Xu Guangwen;Zhong Ziyi;Su Fabing
我们开发了一种简单的方法，通过在炭黑硬模板上沉积-沉淀硝酸铝来制备具有高表面积（AH）（约44 m(2) g(-1)）的α-Al2O3。用Ni前驱体浸渍AH载体，得到Ni/α-Al2O3催化剂(Ni/AH-I)。将上述催化剂制备方法进一步简化，将镍和铝前驱体在碳模板上进行一锅共沉淀，得到AH负载Ni催化剂(Ni/AH-C)。通过氮气吸附、X射线衍射、透射电子显微镜、热重分析、H-2程序升温还原和H2程序升温解吸对样品进行了表征。催化测试结果表明，在常压和高压、重时空速(WHSV)为30 000 mL g(-1) h(-1)下，Ni/AH-I和Ni/AH-C催化剂均比低比表面积α-Al2O3负载的Ni催化剂表现出更高的合成气甲烷化催化性能，并且在极高的50 h高压稳定性测试中表现出良好的稳定性。 WHSV 为 120 000 mL g(-1) h(-1)。加速老化测试表明Ni/AH-C表现出更好的水热稳定性和更强的抗烧结性。这项工作表明，使用炭黑作为硬模板可以高度可行地制备AH，并且适合作为CO甲烷化的Ni催化剂载体。
We have developed a simple approach for the preparation of alpha-Al2O3 with a high surface area (AH) (about 44 m(2) g(-1)) through deposition-precipitation of aluminum nitrate on a carbon black hard template. The AH support was impregnated with a Ni precursor to obtain the Ni/alpha-Al2O3 catalyst (Ni/AH-I). The above catalyst preparation method was further simplified by one-pot co-precipitation of the nickel and aluminum precursors on the carbon template to obtain the AH-supported Ni catalyst (Ni/AH-C). The samples were characterized by nitrogen adsorption, X-ray diffraction, transmission electron microscopy, thermogravimetric analysis, H-2 temperature-programmed reduction and H2 temperature-programmed desorption. The catalytic test results showed that the both Ni/AH-I and Ni/AH-C catalysts exhibited much more enhanced catalytic performance in syngas methanation than a Ni catalyst supported on low-surface-area alpha-Al2O3 at both atmospheric and high pressures, and at a weight hourly space velocity (WHSV) of 30 000 mL g(-1) h(-1), as well as a good stability in a 50 h high-pressure stability test at an extremely high WHSV of 120 000 mL g(-1) h(-1). The test of accelerated aging indicated that Ni/AH-C showed both better hydrothermal stability and stronger resistance to sintering. This work demonstrates AH can be prepared with high feasibility using carbon black as the hard template, and is suitable as a Ni catalyst support for CO methanation.
登录
查看更多内容
影响因子：
3.9
作者：
Jiajian Gao;Chunmiao Jia;Meiju Zhang;Fangna Gu;Guangwen Xu;Z. Zhong;F. Su
通讯作者：
Jiajian Gao;Chunmiao Jia;Meiju Zhang;Fangna Gu;Guangwen Xu;Z. Zhong;F. Su
影响因子：
5.3
作者：
N. Nichio;M. Casella;G. Santori;E. Ponzi;O. Ferretti
通讯作者：
N. Nichio;M. Casella;G. Santori;E. Ponzi;O. Ferretti
影响因子：
7.3
作者：
M. Santiago;J. Groen;J. Pérez–Ramírez
通讯作者：
M. Santiago;J. Groen;J. Pérez–Ramírez
影响因子：
8.6
作者：
L. Pérez;V. Zarubina;H. J. Heeres;I. Melián-Cabrera
通讯作者：
L. Pérez;V. Zarubina;H. J. Heeres;I. Melián-Cabrera
影响因子：
5.5
作者：
Djinovic, Petar;Batista, Jurka;Pintar, Albin
通讯作者：
Pintar, Albin