Preparation of cerium-loaded Y-zeolites for removal of organic sulfur compounds from hydrodesulfurizated gasoline and diesel oil.
Preparation of cerium-loaded Y-zeolites for removal of organic sulfur compounds from hydrodesulfurizated gasoline and diesel oil.
复制标题
DOI：
10.1016/j.jcis.2005.12.051
复制
发表时间：
2006-06
影响因子：
9.9
通讯作者：
M. Xue;R. Chitrakar;K. Sakane;T. Hirotsu;K. Ooi;Y. Yoshimura;M. Toba;Q. Feng
中科院分区：
文献类型：
--
作者：
M. Xue;R. Chitrakar;K. Sakane;T. Hirotsu;K. Ooi;Y. Yoshimura;M. Toba;Q. Feng
制备负载 Ce(IV) 的 Y 沸石 (CeY)，用于选择性去除加氢脱硫 (HDS) 处理的柴油中的痕量有机硫化合物。 CeY 样品可以使用液相离子交换和固态离子交换方法从 NH4-Y-沸石 (NH4Y) 中获得。使用 XRD、IR、XPS、TEM 和 GC 硫分析仪研究了 CeY 样品的离子交换反应、结构和有机硫化合物的选择性吸附。有机硫化合物的吸收很大程度上取决于沸石结构中 Ce 的量和价态。 Ce(IV)的吸附能力比Ce(III)高得多。通过 NH4Y 和 Ce(NO3)3 的固态离子交换反应（Ce/NH4 摩尔比为 0.63）在 250°C 制备的 CeY-S 样品显示，从含有噻吩的 HDS 处理的汽油模型溶液中吸收了最大硫 [S=5ppm (ppm = mg/L)]。研究了使用 CeY-S 和 CuO 吸附剂的组合，通过间歇法去除含有机硫化合物 (S=1.87ppm) 和 H2S (S=0.73ppm) 的 HDS 处理柴油中的 H2S。硫含量首次降至0.01 ppm以下。该方法为制备燃料电池清洁燃料提供了一种有前景的脱硫工艺。
Ce(IV)-loaded Y-zeolites (CeY) were prepared for selective removal of the trace amount of organic sulfur compounds from hydrodesulfurization (HDS)-treated diesel oil. The CeY samples can be obtained from NH4–Y-zeolite (NH4Y) using liquid-phase ion-exchange and solid-state ion-exchange methods. The ion-exchange reactions, structures, and selective adsorptions of organic sulfur compounds of the CeY samples were investigated using XRD, IR, XPS, TEM, and GC sulfur analyzer. The organic sulfur compound uptakes strongly depend on the amount and the valency of Ce in the zeolite structure. Ce(IV) shows much higher adsorptive ability than Ce(III). A CeY–S sample prepared by solid-state ion-exchange reaction of NH4Y and Ce(NO3)3with Ce/NH4mole ratio of 0.63 at 250 °C showed a maximum sulfur uptake from a model solution of HDS-treated gasoline containing thiophene [S=5ppm (ppm = mg/L)]. A desulfurization from a HDS-treated diesel oil containing organic sulfur compounds (S=1.87ppm) and H2S (S=0.73ppm) was investigated with a combination of the CeY–S and a CuO adsorbent for removal of H2S by a batch method. The sulfur content was reduced to below 0.01 ppm for the first time. This method provides a promising desulfurization process to prepare a clean fuel for fuel cells.