添加钴对用于甲烷部分氧化制合成气的Ni-MCM-41结构和性能的影响。
Effect of cobalt addition on the structure and properties of Ni-MCM-41 for the partial oxidation of methane to syngas.
作者信息
Li Yufeng, Wang Junwen, Ding Chuanmin, Ma Lichao, Xue Yanan, Guo Jing, Wang Shunqiang, Meng Yuanyuan, Zhang Kan, Liu Ping
机构信息
College of Chemistry & Chemical Engineering, Taiyuan University of Technology Taiyuan 030024 PR China
Institute of Coal Chemistry, Chinese Academy of Sciences Taiyuan 030001 PR China.
出版信息
RSC Adv. 2019 Aug 15;9(44):25508-25517. doi: 10.1039/c9ra03534f. eCollection 2019 Aug 13.
A one-step hydrothermal crystallization method was used to synthesize Co-Ni-MCM-41 catalysts for the partial oxidation of methane to syngas reaction. Co was added as an assistant in the synthesis process. The formation of a Ni-Co alloy decreased the damage of Ni ions to the framework of MCM-41. The Ni-Co alloy introduced more Ni into the channel exposing more active sites. The properties of the synthesized catalysts were characterized by XRD, N adsorption-desorption, TEM, ICP, FT-IR, H-TPR, XPS and TGA techniques. Co-Ni-MCM-41 catalysts showed superior catalytic performance and sintering resistance than Ni-MCM-41 catalyst without Co. The Ni-Co alloy inhibited the formation of the NiO, thus reducing the sintering of the catalyst. The result was attributed to higher metal dispersion and more regular pore structure of the Co-Ni-MCM-41 catalysts. When the Co content was 1%, a conversion of 88% and selectivity of 87% was achieved.
采用一步水热结晶法合成了用于甲烷部分氧化制合成气反应的Co-Ni-MCM-41催化剂。在合成过程中添加Co作为助剂。Ni-Co合金的形成降低了Ni离子对MCM-41骨架的破坏。Ni-Co合金将更多的Ni引入孔道，暴露出更多的活性位点。采用XRD、N吸附-脱附、TEM、ICP、FT-IR、H-TPR、XPS和TGA技术对合成催化剂的性能进行了表征。Co-Ni-MCM-41催化剂比不含Co的Ni-MCM-41催化剂表现出更优异的催化性能和抗烧结性能。Ni-Co合金抑制了NiO的形成，从而减少了催化剂的烧结。结果归因于Co-Ni-MCM-41催化剂具有更高的金属分散度和更规整的孔结构。当Co含量为1%时，转化率达到88%，选择性达到87%。
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