چكيده فارسي :
Sulfur organic compounds comprise the bulk of the content of sulfur crude oil. sulfurOrganic compounds in crude oil content in Iran between 0.25 to 3.23 weight percent is estimated, so Iran is among the countries with the highest amount of Sulfur organic compounds in its oil reserves. Combustion of fuels get from petroleum like diesel and gasoline produced and emissions from sulfur oxides that cause to environmental pollution and acid rains and are chemical catalyst deactivation. Also acid rain causing to solve construction materials, toxic lake and loss of jungles ]1[. ODS is considered as one of the leading processes to reduce the total sulfur content of fuels due to its potential advantages over HDS. First, it requires no hydrogen, and, second, this process can be carried out at relatively mild conditions (usually 313-373 K and 0.1-0.2 MPa). In fact, the ODS is a kind of desulfurization technology in which oxidants oxidize organic sulfur and the reaction products are eliminated by absorption or extraction ]2[. ODS is conducted at atmospheric pressure where temperature is usually below 100ºC. Regarding the recent studies, oxidative desulfurization can reduce the sulfur content of diesel and gasoline with 1500 ppm to less than 5 ppm while its cost is less that of traditional hydrotreater plants ] 3 [.M41S is the generic term for the various types of MCM (Mobil Composition of Matter) materials in the mesoporous rang. MCM-41 is the most widely studied M41S material [4].This is due to thesimplicity and ease in its preparation with negligible pore-networkingand pore-blocking effects [5].It consists of an amorphous( alumino, metallo)-silicate framework forming hexagonalpores. MCM-41 has high surface areas of up to 1200 m2/g and largepore volumes. The pores are very uniform causing narrow pore sizedistributions]6[.Inthis study, a kind of ternary acidic solid catalysts that include POM / MoO3 / MCM - 41 is used. Using this nano-catalysis POM / MoO3 / MCM- 41 is in desulfurization. The advantage of using this nano-catalysts is having a relatively large surface area and volume, which is a good alternative to Theconventional catalysts. The required Tests to prove Nanvshdn such as Sem, FT-IR, XRD and The BET test to obtain specific surface area of the catalyst weredone. Then optimizing parameters such as molar ratio of O / S, temperature, time and catalysts to achieve maximum conversion rate rate was done.
