化工学报2017，Vol.68Issue(10)：3823-3831,9.DOI:10.11949/j.issn.0438-1157.20170531
一锅法制备高活性高稳定性Ni-Nd-Al三元有序介孔甲烷化催化剂
One-pot synthesis of ternary Ni-Nd-Al ordered mesoporous methanation catalysts with enhanced activity and stability
摘要
Abstract
CO methanation plays an important role in production of synthetic natural gas from coal. Application of Ni-based catalysts was restricted due to poor activity at low temperature, coke forming and Ni particle sintering at high temperature. A series of Nd-decorated Ni-Nd-Al ordered mesoporous methanation catalysts were synthesized by improved solvent evaporation-induced self-assembly method, and their catalytic performances for CO methanation were investigated. N2 adsorption, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (SEM), bright-field transmission electron microscopy (TEM) were used to characterize structure and morphology of both fresh and used catalysts. The results showed that all Ni-Nd-Al catalysts had ordered mesoporous structures, in which Ni particles were anchored but Nd species were dispersed in the ordered mesoporous alumina channels. Addition of appropriate Nd contributed to size reduction and dispersion improvement of Ni particles, and adsorption enhancement of H2, such that catalytic performance was promoted. The confinement effect of ordered mesoporous channels attributed to better anti-coking and anti-sintering properties of catalysts.关键词
Ni基催化剂/介孔结构/制备/CO甲烷化/活性/稳定性Key words
nickel catalyst/mesoporous structure/preparation/CO methanation/reactivity/stability分类
化学化工引用本文复制引用
庄嘉豪,靳国静,古芳娜,贾丽华,苏发兵..一锅法制备高活性高稳定性Ni-Nd-Al三元有序介孔甲烷化催化剂[J].化工学报,2017,68(10):3823-3831,9.基金项目
国家自然科学基金项目(21476238) （21476238）
国家重点基础研究发展计划项目(2014CB744306) （2014CB744306）
多相复杂系统国家重点实验室自主部署课题项目(MPCS-2015-A-06). Foundation item: supported by the National Natural Science Foundation of China (21476238), the National Basic Research Program of China (2014CB744306) and the Fund of State Key Laboratory of Multiphase complex systems (MPCS-2015-A-06). （MPCS-2015-A-06）
