Adsorptive Removal of Dimethyl Disulfide in Olefin Rich C4 with Ion-Exchanged Zeolites

Ind. Eng. Chem. Res., 2011, 50 (10), pp 6382–6390

Adsorptive Removal of Dimethyl Disulfide in Olefin Rich C4 with Ion-Exchanged Zeolites

Jieun Lee†, Hee Tae Beum‡, Chang Hyun Ko‡, Sung Youl Park‡, Jong Ho Park*‡, Jong-Nam Kim‡, Byung-Hee Chun†, and Sung Hyun Kim*†

kimsh@korea.ac.kr

jongho@kier.re.kr

† Chemical and Biological Engineering, Korea University, Anam-dong, Sungbuk-gu, Seoul 136-701, Korea

‡ Korea Institute of Energy Research, 102, Gajeong-ro, Yuseong-gu, Daejeon, 305-343, Korea

Abstract

The study investigates the removal of dimethyl disulfide (DMDS) in the olefin rich Fluid Catalytic Cracking (FCC) C4 hydrocarbon mixture with the ion-exchanged ß-zeolite. Effects of Si/Al ratio, metal cations, and the ion exchange level on the removal efficiency have been accessed.

The metal ions used for the preparation of ion exchanged zeolite are Ag(I), Cu(II), Ni(II), Fe(III), and Cu(I). The adsorption characteristics of 1-Butene and DMDS on the adsorbent have been studied through the temperature programmed desorption (TPD).

[EXCERPT]

This means that the electronic density of the d orbital for the Ag ions in the ß-zeolite is lower than that of the Ag(I), which is believed to be responsible for the π-complexation with the olefin

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