1、 Applied Catalysis B: Environmental 70 (2007) 542547 Reactivity of olens in the hydrodesulfurization of FCC gasoline over CoMo sulde catalyst 加氢脱硫过程中烯烃的反应活性 Makoto Toba *, YasuoMiki, Takashi Matsui, Masaru Harada, Yuji Yoshimura National Institute of Advanced Industrial Science and Technology, Tsuk
2、uba Central -5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan Available online 21 June 2006 Abstract To achieve selective hydrodesulfurization (HDS) of uid catalytic-cracked (FCC) gasoline for producing sulfur-free gasoline (S R1R2C CH2 R1CH CHR2 R1R2C CHR3. It is evident that the structure of ole
3、ns inuences the hydrogenat i on activit y. For HDS conversi on above 93%, the conversion of internal olens abruptly increased. These phenomena suggest that it is possible to depress olen hydrogenation by steric inhibition of the olen molecules approach to the active site on the HDS catalyst. Table 4
4、 shows the effect of sulfur content of feedstock on C6 olen conversions contained in heavy FCC gasoline. Except for linear R1CH CHR2 type C6 olens, most C6 olen conver- sions increased with increasing sulfur content in the feedstock. Owens and Amberg reported that both thiophene and butene Total acy
5、clic C6 olens Terminal olens RCH CH2 1-Hexene 3-Methyl-1-pentene 4-Methyl-1-pentene R1R2C CH2 2-Methyl-1-pentene 2,3-Dimethyl-1-butene Internal olens R1CH CHR2 trans-2-Hexene cis-2-Hexene trans-3-Hexene cis-3-Hexene trans-4-Methyl-2-pentene cis-4-Methyl-2-pentene R1R2C CHR3 2-Methyl-2-pentene trans-
6、3-Methyl-2-pentene cis-3-Methyl-2-pentene 18.9 51.3 57.0 38.1 42.6 31.3 36.5 4.8 16.3 9.7 28.5 11.4 35.0 6.9 20.4 13.1 21.8 7.0 6.8 19.9 54.8 59.2 44.2 48.9 33.9 38.8 9.1 15.7 8.2 28.8 9.3 34.0 11.3 23.9 14.9 24.0 8.5 8.4 hydrogenation are retarded by H2S 8. Hatanaka et al. reported that H2S retarded the hydrogenation of 1-octene and 1-hexene and accelerat ed the hydrogenation of 2,4,4-trimethyl -2 -pent ene 1. Our results obtained usin
