Li Yufeng, Wang Junwen, Ding Chuanmin, Ma Lichao, Xue Yanan, Guo Jing, Wang Shunqiang, Meng Yuanyuan, Zhang Kan, Liu Ping
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.
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%。
