Deactivation of hydrotreatment catalysts used for coal liquids [electronic resource] : Semi-annual report, November 12, 1988--May 11, 1989.
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| Online Access: |
Online Access (via OSTI) |
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| Corporate Author: | |
| Format: | Government Document Electronic eBook |
| Language: | English |
| Published: |
Morgantown, W.Va. : Oak Ridge, Tenn. :
West Virginia University ; distributed by the Office of Scientific and Technical Information, U.S. Department of Energy,
1989.
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| Subjects: |
| Abstract: | Coal liquid hydrotreatment catalysts deactivate rapidly due to deposition of coke and metals inside the pores of the catalyst particles. The deactivation can be due to the gradual choking of the catalyst pores and/or due to the suppression of active sites on the catalyst. The objective of the proposed work is to determine which of these two mechanisms of deactivation is predominant, and this is done by using the Constant Deactivation Arrhenius Plot (CDAP) technique. The inertness of the solvent (m-Xylene) was checked over Co-Mo/Al/sub 2/O/sub 3/ (Houdry HR-801) and Ni-Mo/Al/sub 2/O/sub 3/ (Shell 324M) catalyst. This test was carried out at or near extreme conditions to be employed for further experiments. In order to test the accuracy of the results obtained from the continuous flow reactor unit, rate constants obtained for the HDS of thiophene over fresh Co-Mo/Al/sub 2/O/sub 3/ (Houdry HR-801) were compared with those obtained by Froment et al. over Co-Mo/Al/sub 2/O/sub 3/ catalyst (Procatalyse HR 306) under the same reaction conditions. Tests were also carried out to determine if the catalyst needed to be pre-sulfided before every reaction run at each temperature or if it was sufficient to pre-sulfide the catalyst only once. 1 ref., 3 figs., 7 tabs. |
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| Item Description: | Published through SciTech Connect. 01/01/1989. "doe/pc/79808-t1" "DE89013513" Dadyburjor, D. B. |
| Physical Description: | Pages: 12 : digital, PDF file. |