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Title: W-incorporated CoMo/{lambda}-Al{sub 2}O{sub 3} hydrodesulfurization catalyst. I. Catalytic activities

Abstract

The promotional effect of tungsten in the CoMo/{gamma}-Al{sub 2}O{sub 3} catalyst was studied for series of W-incorporated CoMo/{gamma}-Al{sub 2}O{sub 3} catalysts with different content of tungsten. Two series of the catalysts were prepared by changing the impregnation order of cobalt and tungsten onto a base Mo/{gamma}-Al{sub 2}O{sub 3} catalyst. Impregnation of tungsten was achieved under the condition that the pH of an aqueous impregnating solution of W anion was controlled to 9.5. The hydrodesulfurization (HDS) and hydrogenation (HYD) activities of the sulfided catalysts were evaluated by thiophene HDS and ethylene HYD reactions at atmospheric pressure, respectively. Low-temperature O{sub 2} chemisorption at 195 K was conducted for the sulfided catalysts in order to determine the W-incorporation effects on the surface concentration of coordinatively unsaturated sites related to the catalytic activities. The dependence of catalytic activities on tungsten content showed initially an increase and subsequent decrease with increasing tungsten content. The maximum promotion of HDS and HYD activities occurred at a low content of tungsten corresponding to 0.025 in W/(W + Mo) atomic ratio regardless of the impregnation order of tungsten and cobalt. Oxygen uptake correlated well with catalytic activities. In general, the catalysts prepared by impregnating tungsten onto the CoMo/{gamma}-Al{sub 2}O{submore » 3} showed higher activities than the catalysts prepared by impregnating tungsten onto Mo/{gamma}-Al{sub 2}O{sub 3} prior to impregnation of cobalt. 37 refs., 7 figs., 2 tabs.« less

Authors:
;  [1]; ; ;  [2]
  1. Korea Institute of Energy Research, Taejon (Korea, Republic of)
  2. Hanyang Univ., Seoul (Korea, Republic of)
Publication Date:
OSTI Identifier:
263787
Resource Type:
Journal Article
Journal Name:
Journal of Catalysis
Additional Journal Information:
Journal Volume: 159; Journal Issue: 1; Other Information: PBD: Mar 1996
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; 01 COAL, LIGNITE, AND PEAT; TUNGSTEN; CATALYTIC EFFECTS; COBALT; MOLYBDENUM; ALUMINIUM OXIDES; THIOPHENE; DESULFURIZATION; HYDROGENATION; ETHYLENE; CATALYSTS; HETEROGENEOUS CATALYSIS; CONCENTRATION RATIO

Citation Formats

Lee, D K, Lee, I C, Park, S K, Bae, S Y, and Woo, S I. W-incorporated CoMo/{lambda}-Al{sub 2}O{sub 3} hydrodesulfurization catalyst. I. Catalytic activities. United States: N. p., 1996. Web. doi:10.1006/jcat.1996.0080.
Lee, D K, Lee, I C, Park, S K, Bae, S Y, & Woo, S I. W-incorporated CoMo/{lambda}-Al{sub 2}O{sub 3} hydrodesulfurization catalyst. I. Catalytic activities. United States. https://doi.org/10.1006/jcat.1996.0080
Lee, D K, Lee, I C, Park, S K, Bae, S Y, and Woo, S I. 1996. "W-incorporated CoMo/{lambda}-Al{sub 2}O{sub 3} hydrodesulfurization catalyst. I. Catalytic activities". United States. https://doi.org/10.1006/jcat.1996.0080.
@article{osti_263787,
title = {W-incorporated CoMo/{lambda}-Al{sub 2}O{sub 3} hydrodesulfurization catalyst. I. Catalytic activities},
author = {Lee, D K and Lee, I C and Park, S K and Bae, S Y and Woo, S I},
abstractNote = {The promotional effect of tungsten in the CoMo/{gamma}-Al{sub 2}O{sub 3} catalyst was studied for series of W-incorporated CoMo/{gamma}-Al{sub 2}O{sub 3} catalysts with different content of tungsten. Two series of the catalysts were prepared by changing the impregnation order of cobalt and tungsten onto a base Mo/{gamma}-Al{sub 2}O{sub 3} catalyst. Impregnation of tungsten was achieved under the condition that the pH of an aqueous impregnating solution of W anion was controlled to 9.5. The hydrodesulfurization (HDS) and hydrogenation (HYD) activities of the sulfided catalysts were evaluated by thiophene HDS and ethylene HYD reactions at atmospheric pressure, respectively. Low-temperature O{sub 2} chemisorption at 195 K was conducted for the sulfided catalysts in order to determine the W-incorporation effects on the surface concentration of coordinatively unsaturated sites related to the catalytic activities. The dependence of catalytic activities on tungsten content showed initially an increase and subsequent decrease with increasing tungsten content. The maximum promotion of HDS and HYD activities occurred at a low content of tungsten corresponding to 0.025 in W/(W + Mo) atomic ratio regardless of the impregnation order of tungsten and cobalt. Oxygen uptake correlated well with catalytic activities. In general, the catalysts prepared by impregnating tungsten onto the CoMo/{gamma}-Al{sub 2}O{sub 3} showed higher activities than the catalysts prepared by impregnating tungsten onto Mo/{gamma}-Al{sub 2}O{sub 3} prior to impregnation of cobalt. 37 refs., 7 figs., 2 tabs.},
doi = {10.1006/jcat.1996.0080},
url = {https://www.osti.gov/biblio/263787}, journal = {Journal of Catalysis},
number = 1,
volume = 159,
place = {United States},
year = {1996},
month = {3}
}