Commercialization of Hybrid Titania Catalyst for Hydrodesulfurization of Diesel Oil
- Akihiro Muto (Chiyoda Corporation) | Yukitaka Wada (Chiyoda Corporation) | Dai Takeda (Chiyoda Corporation) | Shinichi Inoue (Chiyoda Corporation)
- Document ID
- World Petroleum Congress
- 21st World Petroleum Congress, 15-19 June, Moscow, Russia
- Publication Date
- Document Type
- Conference Paper
- 2014. World Petroleum Council
- Hybrid Titania support, Cobalt molybdenum catalyst, Hydrodesulfurization (HDS), Hydrotreating, Titania support, Hydrodenitrogenation (HDN)
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Alumina supported CoMo has been mainly used as a commercial hydrodesulfurization(HDS) catalyst. On the other hand, since the HDS activity per unit surface area of the titania catalyst is significantly high, the potential of titania as a carrier for the HDS catalyst was considered. However, the titania catalyst has not been industrialized, because it had been technically difficult to boost the specific surface area of the catalyst to the same level as that of the alumina catalyst.
We developed a first generation titania supported CoMo catalyst (titania catalyst), which has a high specific surface area using the original preparation technology. The first generation titania catalyst not only has a high HDS activity, but also a high selectivity for the denitrogenation reaction, moreover, the consumed hydrogen amount during the process was lower in comparison to the alumina catalysts. However, the material cost and compact bulk density of the first generation titania catalyst was higher than the conventional alumina catalysts, therefore, it was not commercialized.
Based on the technology of the first generation titania catalyst, we have successfully developed the Hybrid Titania catalyst by combining the advantages of the titania and alumina carriers. The shortcomings of the first generation titania catalyst were successfully overcome by the Hybrid Titania catalyst, which also exhibited a more significant improvement in the HDS activity.
We have already industrialized the production of the Hybrid Titania catalyst and established the supply system. We have installed it in a commercial HDS unit in a certain refinery in Japan as the first commercial product of this catalyst, and the production of sulfur-free diesel oil from a mixture of straight run gas oil and FCC-LCO began in 2014. The Hybrid Titania catalyst is applicable to HDS processes with a feed of kerosene, thermal cracked oil, vacuum gas oil as well as diesel oil.
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