Effect of γ-alumina nanorods on CO hydrogenation to higher alcohols over lithium-promoted CuZn-based catalysts
- Authors
- Choi, SuMin; Kang, YoungJong; Kim, SangWoo
- Issue Date
- Jan-2018
- Publisher
- ELSEVIER
- Keywords
- Cu-Zn-Al catalyst; Alumina nanorods; CO hydrogenation; Higher alcohols; Li-Promoter; Syngas
- Citation
- APPLIED CATALYSIS A-GENERAL, v.549, pp.188 - 196
- Indexed
- SCIE
SCOPUS
- Journal Title
- APPLIED CATALYSIS A-GENERAL
- Volume
- 549
- Start Page
- 188
- End Page
- 196
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/150749
- DOI
- 10.1016/j.apcata.2017.10.001
- ISSN
- 0926-860X
- Abstract
- To achieve high catalytic activities and long-term stability to produce higher alcohols via CO hydrogenation, the catalytic activities were tuned by controlling the loading amounts of gamma-alumina nanorods and Al3+ ions added to modify Cu-Zn catalysts promoted with Li. The selectivity of higher alcohols and the CO conversion to higher alcohols over a Li-modified Cu0.45Zn0.45Al0.1 catalyst supported on 10% nanorods were 1.8 and 2.7 times higher than those with a Cu-Zn catalyst without nanorods and Al3+ ions, respectively. The introduction of the thermally and chemically stable gamma-Al2O3 nanorod support and of Al3+ to the modified catalysts improves the catalytic activities by decreasing the crystalline size of CuO and increasing the total basicity. Along with the nanorods, a refractory CuAl2O4 formed by the thermal reaction of CuO and Al3+ enhances the long-term stability by increasing the resistance to sintering of the catalyst.
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