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Removal of mercaptans from oil by hollow fiber membrane-based extraction

journal contribution
posted on 2008-01-01, 00:00 authored by Xing YangXing Yang, Zhong-ru Xiao, Yi-ming Cao, Quan Yuan
A hollow fiber membrane contactor consisted of highly hydrophilic asymmetric cellulose ultra-filtration membrane was used to remove the mercaptan (RSH) from simulated gasoline (RSH/n-octane system) via extraction. Effects of operation conditions including extractant species, its flowrate and concentration, feed flowrate and volume ratio of feed to extractant (0.5~3) on RSH removal efficiency and overall mass transfer coefficient were investigated. The experiment results indicate that the oil film resistance controls the overall mass transfer process when 3%(wt) NaOH solution is employed as extractant. Furthermore, the overall mass transfer coefficient increases with increasing extractant concentration and feed flowrate, while remains constantly with increasing extractant flowrate and volume ratio of feed to extractant. After treated with above membrane-based extraction, a high RSH removal efficiency over 99% could be achieved with almost no oil loss; the sulfur content in the mercaptan removed simulated gasoline is less than 10 ug•g^(-1). Finally, the operation process of the fiber membrane contactor shows excellent stability.

History

Journal

Journal of Chemical Engineering of Chinese Universities (Gaodeng Xuexiao Huaxue Gongcheng Xuebao)

Issue

5

Article number

5

Pagination

762 - 767

Publisher

Zhejiang University, College of Materials Science and Chemical Engineering (Zhejiang Daxue Cailiao yu Huaxue Gongcheng Xueyuan)

Location

Hangzhou, China

ISSN

1003-9015

Language

chi

Publication classification

CN.1 Other journal article

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