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¹§Ï²Ä㣬ÊÕ¼ÁË£¬ÈçÏ Title: Photochemical oxidation of thiophene by O-2 in an organic two-phase liquid-liquid extraction system Author(s): Zhao D (Zhao, D.), Li F (Li, F.), Han J (Han, J.), Li H (Li, H.) Source: PETROLEUM CHEMISTRY 47 (6): 448-451 NOV 2007 Document Type: Article Language: English Cited References: 8 Times Cited: 0 Abstract: Photochemical oxidation products and the kinetics of thiophene in an n-octane/acetonitrile extraction system using O-2 as an oxidant was studied. The results could be used as a reference for the oxidative desulfurization of gasoline because thiophene is one of the main components containing sulfur in a fluid catalytic cracking (FCC) gasoline. Thiophene dissolved in n-octane was photodecomposed and removed into the water phase at an ambient temperature and atmospheric pressure. A 500-W high-pressure mercury lamp (main wavelength 365 nm, 0.22 kW m(-2)) was used as the light source for irradiation and air was introduced by a gas pump to supply O-2. Thiophene could be photooxidized to SO42- and CO2. The desulfurization yield of thiophene in n-octane is 65.2% for a 5-h photoirradiation under the conditions of air flow at 150 m min(-1) and V(n-octane): V(acetonitrile) = 1 : 1. It can be improved to 96.5% by adding 1.5 g L-1 artificial zeolite, which is an absorbent for O-2. Under such conditions, the photooxidation kinetics of thiophene with O-2 is of the first order with an apparent rate constant of 0.6297 h(-1) and a half time of 1.10 h. The sulfur content can be depressed from 800 to 28 ppm. KeyWords Plus: LIGHT OIL; DESULFURIZATION PROCESS Addresses: Zhao D (reprint author), Tianjin Univ, Sch Chem Engn, Tianjin 300072, Peoples R China Tianjin Univ, Sch Chem Engn, Tianjin 300072, Peoples R China Hebei Univ Sci & Technol, Coll Chem & Pharmaceut Engn, Shijiazhuang 050018, Peoples R China Hebei Univ Sci & Technol, Coll Sci, Shijiazhuang 050018, Peoples R China E-mail Addresses: dishunzhao@yahoo.com.cn Publisher: MAIK NAUKA/INTERPERIODICA/SPRINGER, 233 SPRING ST, NEW YORK, NY 10013-1578 USA Subject Category: Chemistry, Organic; Chemistry, Physical; Energy & Fuels; Engineering, Chemical; Engineering, Petroleum IDS Number: 239EF ISSN: 0965-5441 |

2Â¥2008-01-17 09:29:34
touchingsoil
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3Â¥2008-01-17 09:42:28
jql1314
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4Â¥2008-01-17 19:57:18













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