Department of Environmental Energy Engineering, Graduate School of Kyonggi University, 94 San, Iui-dong, Youngtong-ku, Suwon-si, Gyeonggi-do, 16227, Republic of Korea.
Department of Environmental Energy Engineering, Kyonggi University, 94 San, Iui-dong, Youngtong-gu, Suwon-si, Gyeonggi-do, 16227, Republic of Korea.
J Environ Manage. 2018 Jul 15;218:88-94. doi: 10.1016/j.jenvman.2018.04.034. Epub 2018 Apr 16.
Ni-based quaternary disk catalysts were manufactured for low-temperature CO methanation reactions, and the reaction activity was examined with respect to the thermal treatment conditions. By applying varying reduction and combustion treatments, the same catalysts were compared, and the Ni oxidation conditions and physical features were confirmed through X-Ray diffraction, scanning electron microscopy, and energy dispersive X-ray analyses. In addition, oxygen adsorption/desorption changes were measured by temperature-programmed reduction after pre-treating with oxygen and hydrogen. The reduction treatment catalyst showed a conversion of 20% at 280 °C, and the 70% calcined catalyst did not form a NiO crystalloid. The activation of the catalyst increased because of NiO movement on the catalyst surface, which enabled easy transformation to metallic Ni. The prepared catalyst is a highly reactive, yet stable, candidate for practical catalytic CO methanation.
镍基四元盘状催化剂被制备用于低温 CO 甲烷化反应，并针对热处理条件考察了其反应活性。通过施加不同的还原和燃烧处理，对相同的催化剂进行了比较，并通过 X 射线衍射、扫描电子显微镜和能量色散 X 射线分析确认了 Ni 的氧化条件和物理特征。此外，通过在预氧和预氢处理后进行程序升温还原测量了氧吸附/解吸变化。还原处理催化剂在 280°C 时的转化率为 20%，70%煅烧的催化剂没有形成 NiO 微晶。由于 NiO 在催化剂表面的移动，催化剂的活化增加，从而使 Ni 容易转化为金属态 Ni。所制备的催化剂是一种高反应性但稳定的实用催化 CO 甲烷化的候选者。
