Ordered Mesoporous Ni-Fe-Al Catalysts for CO Methanation with Enhanced Activity and Resistance to Deactivation
Ordered Mesoporous Ni-Fe-Al Catalysts for CO Methanation with Enhanced Activity and Resistance to Deactivation
复制标题
具有增强活性和抗失活能力的有序介孔 Ni-Fe-Al 催化剂用于 CO 甲烷化
DOI：
10.1021/acs.iecr.7b02174
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发表时间：
2017-09-06
影响因子：
4.2
通讯作者：
Su, Fabing
中科院分区：
文献类型：
--
作者：
Liu, Qing;Qiao, Yingyun;Su, Fabing
采用一锅蒸发诱导自组装（EISA）法制备了一系列有序介孔Ni-Fe-Al三元氧化物复合材料，并将其应用于CO甲烷化反应制备合成天然气。结果表明，含适量Fe组分（10N1FOMA）的有序介孔Ni-Fe- al催化剂由于Ni弥散性和H-2吸收率较高，其CO转化率和CH4选择性均优于含相同组分、无有序介孔的浸染型10N1FA催化剂。在120 h的常压寿命测试中，有序介孔10N1FOMA催化剂的抗烧结和抗结焦性能较无序介孔10N1FA有显著提高，这主要是由于介孔通道的约束作用、有序介孔氧化铝载体的弱酸性以及Ni粒径较小(
A series of ordered mesoporous Ni-Fe-Al ternary oxide composites were prepared via a one-pot evaporation-induced self-assembly (EISA) method and applied in a CO methanation reaction to produce synthetic natural gas. The results showed that the ordered mesoporous Ni-Fe-Al catalyst with proper amount of Fe species (10N1FOMA) had better both CO conversion and CH4 selectivity than the impregnation-derived 10N1FA catalyst with unordered mesopores and identical component, owing to the higher Ni dispersion and larger H-2 uptake. In a 120 h atmospheric-pressure lifetime test, the ordered mesoporous 10N1FOMA catalyst showed significant enhancement in both antisintering and anticoking properties in comparison with the unordered mesoporous 10N1FA, mainly because of the confinement effect of the mesopore channels, the weak acidity of ordered mesoporous alumina support, and the smaller Ni particle size (