Development of nickel catalyst supported on MgO–TiO2 composite oxide for DIR-MCFC
Development of nickel catalyst supported on MgO–TiO2 composite oxide for DIR-MCFC
复制标题
MgO-TiO2复合氧化物负载镍催化剂的开发用于DIR-MCFC
DOI：
10.1016/j.cattod.2004.06.004
复制
发表时间：
2004
期刊：
影响因子：
5.3
通讯作者：
Ho
中科院分区：
文献类型：
--
作者：
Jae;H. Kwon;T. Lim;Seong;Ho
为了制备抗Li中毒的负载型Ni重整催化剂，实现直接内重整熔融碳酸盐燃料电池（DIR-MCFC）的商业化，制备了一系列不同Mg/Ti比的MgO-TiO 2复合氧化物负载型Ni重整催化剂。在无Li条件下，负载型Ni重整催化剂无论Mg/Ti比如何都具有活性，但Li的引入使催化剂的活性不同程度地丧失。程序升温还原（TPR）和X射线衍射（XRD）结果表明，在NiO/MgO催化剂体系中加入相对少量的TiO 2可以有效地阻止NixMg 1 −xO固溶体的形成，并提高抗Li中毒的能力。结果表明，Mg/Ti比为2-7的复合氧化物负载的Ni催化剂比其它Mg/Ti比的催化剂具有更好的抗Li中毒能力，即使在苛刻的碳酸锂条件下，活性仍保持在原来的60%左右。
As an effort to synthesize supported Ni reforming catalysts resistant to Li poisoning, which is essential in commercializing the direct internal reforming molten carbonate fuel cells (DIR-MCFC), a series of Ni catalysts supported on MgO–TiO2composite oxides with varying ratio of Mg to Ti were prepared. Under the Li-free condition, the supported Ni reforming catalysts were active regardless of the ratio of Mg to Ti; however, when Li was introduced to the catalysts, the catalysts lost their activities with different degrees. Temperature-programmed reduction (TPR) and X-ray diffraction (XRD) results indicated that the addition of relatively small fraction of TiO2into the NiO/MgO catalyst system was effective in obstructing the formation of NixMg1−xO solid solution and in increasing resistance to Li poisoning. The Ni catalysts supported on the composite oxides with Mg/Ti ratios of 2–7 turned out to be far more resistant to Li poisoning, showing approximately 60% of their original activities even under severe lithium carbonate condition, than the ones with other Mg/Ti ratios.