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Indian Journal of Chemistry -Section A (IJC-A) >
IJC-A Vol.51A [2012] >
IJC-A Vol.51A(12) [December 2012] >
| Title: | Catalytic activity of liquid phase prepared Cu-Zn-Al catalyst for CO hydrogenation in a fixed bed reactor |
| Authors: | Luan, Chunhui
Zhang, Anrong
Wang, Xiaodong
Huang, Wei
Yin, Lihua |
| Keywords: | Catalysts
Liquid phase catalysts
Fixed bed reactor
Carbon monoxide hydrogenation
Copper
Zinc
Aluminium |
| Issue Date: | 8-Dec-2012 |
| Abstract: | Cu-Zn-Al catalyst prepared by a complete
liquid phase technology for CO hydrogenation has been investigated in a fixed
bed reactor in terms of catalytic performance and
compared with catalysts prepared by a traditional method such as
co-precipitation. The catalysts are characterized by XRD, NH3-TPD, H2-TPR
and XPS. Results show that the activity of the liquid phase prepared
catalyst is much lower in fixed bed reactor than in a slurry reactor. It was
also much lower than that of the catalyst prepared by co-precipitation,
although its stability is higher. XPS and XRD characterization
reveal that there are obvious differences in the structure, morphology and
surface state of the catalysts prepared by the two methods. In the catalyst
prepared by liquid phase technology, Cu exists in the form of metallic Cu even
though the catalyst is unreduced and there are more acid
sites and more carbon on its surface than on the surface of the
co-precipitation catalyst. It is concluded that there is a surface carbon film
covering the liquid phase catalyst, and the carbon film is an important reason for
the low activity when the catalyst is applied to fixed bed reactor. Coke
burning off, an effective way for removing the surface carbon, improves the
catalyst activity in a fixed reactor. |
| Page(s): | 1663-1668 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Source: | IJC-A Vol.51A(12) [December 2012]
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