Effect of cyclohexene on thiophene adsorption over NaY and LaNaY zeolites

Ultra-deep adsorptive removal of thiophenic sulfur compounds from FCC gasoline over the specific active sites of CeHY zeolite

“…As reported in the literatures, the catalytic reactions can occur once thiophene molecules are adsorbed on the protonic or metal cations modified zeolite adsorbents at ambient temperature [34][35][36][37][38][39][40][41] . Guisnet et al have found thiophene dimers and trimers as the main products on HFAU zeolites with different molar ratios of Si and Al by employing GC-MS detected method [34] .…”

“…Guisnet et al have found thiophene dimers and trimers as the main products on HFAU zeolites with different molar ratios of Si and Al by employing GC-MS detected method [34] . Tian et al have detected that bulkier alkylthiophenes molecules are formed on LaNaY zeolite by exploiting the mixtures with cyclohexene and thiophene as the researching object [41] . Besides, a similar conclusion is also acquired in our work by using REY zeolites [34,36,39,40] .…”

Adsorption desulfurization and weak competitive behavior from 1-hexene over cesium-exchanged Y zeolites (CsY)

“…But the band at 1396 cm −1 , which was associated to be 13 cm −1 shifted to lower wavenumbers, was assigned to the perturbed fundamental ring stretching vibration ( ν5). The red shift of the stretching vibration of C = C arose from a decrease in the electron density of the entire thiophene ring, indicating that the ring of the adsorbed thiophene molecule is parallel to the surface of CsY zeolite [24] . Thus, the thiophene molecule is adsorbed molecularly on CsY through π -complexation, suggesting that no protonization or oligomerization reaction of thiophene occurred in the process.…”

“…Simultaneously, the acidity of adsorbents could also affect the selective adsorption of sulfur compounds. Researchers [16] http://dx.doi.org/10.1016/j.jechem.2017.04.006 2095-4956/© 2017 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press.…”

Optimization of sulfur adsorption over Ag-zeolite nanoadsorbent by experimental design method

“…The IR analysis demonstrated that the impregnating Ag ion on synthesized X-zeolite has little effect on the zeolite chemical structure. The FT-IR spectra of the NaX, AgX- (b, d) which is assigned to the C-H stretching vibration of saturated CH 3 and CH 2 , indicating some of the adsorbed thiophene can undergo the opening of its thiophenic ring in adsorption processes, the change on the molecular structure has taken place Shi et al 2013;Balkus and Ly 1991).…”