Desulfurization system for hydrocarbon fuel

Catalyst – solid sorbent – or support therefor: product or process – Zeolite or clay – including gallium analogs – And additional al or si containing component

Reexamination Certificate

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Details

C502S060000, C502S063000, C502S067000, C502S069000, C502S079000, C502S407000, C502S414000, C502S517000, C423S244020, C423S244040, C208S246000, C208S248000, C585S820000

Reexamination Certificate

active

08043989

ABSTRACT:
A system is provided for desulfurizing a hydrocarbon fuel containing a light amount of methanol and a slight amount of water. The desulfurization system uses a Y-type zeolite-based desulfurizing agent containing at least copper arranged upstream of the system and an X-type zeolite-based desulfurizing agent containing at least silver arranged downstream of the system and thus can maintain desulfurization effect for a long period of time.

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S. Kasaoka et al.; “Adsorption of Dimethyl Sulfide with Various Ion-exchanged Y-type Zeolites”; The Chemical Society of Japan; vol. 12; pp. 1945-1950; (1981).
EP Supplemental Search Report issued Apr. 13, 2011 in counterpart EP Application No. 08 82 5881.

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