Abstract We have developed a heterogeneous catalyst for the decomposition and removal of dimethyl sulfide used as an odorant in fuels such as city gas in residential fuel cell systems. For the dimethyl sulfide decomposition at 500 °C over various oxides such as γ-Al2O3, TiO2, ZrO2, CeO2, SiO2, and MgO, it was found that adsorption of dimethyl sulfide and other products containing sulfur components, sulfurization of metal oxides, and decomposition of dimethyl sulfide occurred. Namely, dimethyl sulfide could be removed from the reaction gas by several reactions. Furthermore, the loading of the nickel component on γ-Al2O3 as a metal component led to high decomposition performance. Based on the XRD, H2-TPR, and UV–Vis spectra analyses, after the preparation, this catalyst exists in the state of nickel oxide and nickel aluminate supported on γ-Al2O3. However, upon exposure to the dimethyl sulfide or hydrogen sulfide feed, the sulfurization reaction of nickel species proceeds, leading to the transformation of the material to nickel sulfide and the enhancement of the decomposition reaction. Furthermore, based on the results of the optimization of the nickel loading amount, we revealed that the 10 wt% supported catalyst was the best catalyst.

中文翻译：

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用于催化分解二甲硫醚的氧化物负载镍基催化剂的开发

摘要 我们开发了一种用于分解和去除二甲基硫醚的多相催化剂，该催化剂用作住宅燃料电池系统中城市燃气等燃料中的气味剂。对于 γ-Al2O3、TiO2、ZrO2、CeO2、SiO2 和 MgO 等多种氧化物在 500 °C 下的二甲基硫醚分解，发现二甲基硫醚和其他含有硫成分的产物的吸附、金属氧化物的硫化和发生二甲硫分解。即，可以通过几个反应从反应气体中除去二甲硫醚。此外，将镍组分负载在作为金属组分的 γ-Al2O3 上导致高分解性能。基于 XRD、H2-TPR 和 UV-Vis 光谱分析，制备后，该催化剂以负载在 γ-Al2O3 上的氧化镍和铝酸镍的状态存在。然而，当暴露于二甲硫或硫化氢原料时，镍物种的硫化反应进行，导致材料向硫化镍的转化和分解反应的增强。此外，基于镍负载量的优化结果，我们发现 10 wt% 负载的催化剂是最好的催化剂。