Electrochemical Utilization of Hydrogen Sulfide

硫化氢的大量来源存在于，例如天然气中，作为石油炼制的产物——脱硫过程的产物。硫化氢是一种毒药和腐蚀剂。将其电化学转化为纯硫可以产生理想的产品和能量。本项目涉及高温燃料电池中硫化氢在不同电极上氧化的电化学研究。该工艺旨在通过使用固体氧化物燃料电池来克服硫化氢的腐蚀性，并通过在足够高的温度下操作来克服单质硫的绝缘性。固体氧化物燃料电池可用于化学合成以及电力生产，其中阳极用于气态反应物的选择性部分氧化。将尝试一系列的氧化催化剂：通过化学气相沉积或溅射应用铂，钙钛矿结构陶瓷作为薄糊状物和硫尖晶石应用。特别令人感兴趣的是，氧化是否能在水和单质硫处停止，还是继续生成二氧化硫。操作条件，以及电极材料，将变化，以引出这种控制。

Substantial sources of hydrogen sulfide exist with, for example natural gas, and as a product of petroleum refining - a product of the desulfurization process. Hydrogen sulfide is a poison and a corrosive agent. Converting it electrochemically to pure sulfur could produce a desirable product as well as energy. This project involves the study of the electrochemistry of hydrogen sulfide oxidation at different electrodes in a high temperature fuel cell. The process is designed to overcome the corrosive nature of hydrogen sulfide by using a solid - oxide fuel cell and the insulating nature of elemental sulfur by operating at high enough temperatures. Solid oxide fuel cells can be used for chemical synthesis as well as power production where the anode is used for selective partial oxidation of gaseous reactants. A series of oxidation catalysts will be tried: platinum applied by chemical vapor deposition or sputtering, perovskite-structure ceramics applied as a thin paste and thiospinels. Of special interest is whether the oxidation can be halted at water and elemental sulfur, or whether it proceeds to sulfur dioxide. Operating conditions, as well as electrode material, will be varied to elicit such control.