Xue Mei, Chitrakar Ramesh, Sakane Kohji, Hirotsu Takahiro, Ooi Kenta, Yoshimura Yuji, Feng Qi, Sumida Naoto
Research Institute for Environmental Management Technology, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi, Takamatsu, 761-0395, Japan.
J Colloid Interface Sci. 2005 May 15;285(2):487-92. doi: 10.1016/j.jcis.2004.12.031.
Adsorption of the organic sulfur compounds thiophene (TP) and 1-benzothiophene (1-BTP) in an organic model solution of hydrodesulfurizated gasoline (heptane with 1 wt% toluene and 0.156 mM (5 ppmw as sulfur) TP or 1-BTP) was studied by a batch method at 80 degrees C using metal-ion-exchanged Y-zeolites. Although NaY-zeolite or its acid-treated material rarely adsorbed the organic sulfur compounds, NaY-zeolites exchanged with Ag+, Cu2+, and Ce3+ ions and NH(4)Y-zeolites exchanged with Ce3+ ions showed markedly high adsorptive capacities for TP and 1-BTP. The sulfur uptake increased in the order CuY-zeolite(Na)<AgY-zeolite(Na)<CeY-zeolite(Na) for both the organic sulfur compounds. The adsorption isotherms for TP and 1-BTP followed the Langmuir's relationship and the saturation capacities by CeY-zeolite(Na) were calculated as 0.022 and 0.033 mmol/g, respectively. The mole ratios of TP/Ce and 1-BTP/Ce were 0.031 and 0.047, respectively. CeY-zeolite(NH4) which was prepared from NH4Y-zeolite showed less uptake of TP and 1-BTP than CeY-zeolite(Na), probably due to its lower cerium content.
采用间歇法，在80℃下，使用金属离子交换Y型沸石，研究了有机硫化物噻吩（TP）和1-苯并噻吩（1-BTP）在加氢脱硫汽油有机模型溶液（含1 wt%甲苯和0.156 mM（5 ppmw硫）TP或1-BTP的庚烷）中的吸附情况。尽管NaY沸石或其酸处理材料很少吸附有机硫化物，但与Ag⁺、Cu²⁺和Ce³⁺离子交换的NaY沸石以及与Ce³⁺离子交换的NH₄Y沸石对TP和1-BTP表现出明显较高的吸附容量。对于这两种有机硫化物，硫吸附量按CuY沸石（Na）＜AgY沸石（Na）＜CeY沸石（Na）的顺序增加。TP和1-BTP的吸附等温线符合朗缪尔关系，CeY沸石（Na）的饱和容量分别计算为0.022和0.033 mmol/g。TP/Ce和1-BTP/Ce的摩尔比分别为0.031和0.047。由NH₄Y沸石制备的CeY沸石（NH₄）对TP和1-BTP的吸附量比CeY沸石（Na）少，这可能是由于其铈含量较低。
