关键词: 非噻吩类硫化物, 吸附脱硫, 金属改性, 烯烃, 竞争吸附

Abstract: In order to develop high efficiency adsorbents for non-thiophene sulfides, CuY, CrY, CoY and NiY adsorbents were prepared by maceration method, and the effects of different metals on the morphology and acidity of adsorbents were investigated by using relative characterization techniques. The results showed that Cu and Ni could increase the acidity of Lewis and form the S-M bond, so the adsorbent had better adsorption desulfurization effect. However, the metal Ni tended to agglomerate and block the pore of adsorbent, which affected the sulfide diffusion and made the adsorption desulfurization effect weaker than that of CuY. When the mass fraction of Cu was 10%, the sulfur capacity of Cu10/Y was highest (14.24 mg/g). In addition, the effect of olefin on the adsorption and removal of non-thiophene sulfides was also investigated. With the increase of olefin content, the adsorption capacity of the adsorbent decreased. According to the calculation of dipole moment and electrostatic potential, 1-hexene and sulfide could form complexes with metal, which could lead to competitive adsorption and affect the adsorption desulfurization effect.

Key words: non-thiophene sulfides, adsorption desulfurization, metal modification, olefin, competitive adsorption