Mixed Conducting Membrane for Spontaneous Sulfur Recovery

本研究旨在开发一种钙钛矿膜系统，用于将硫化氢（H2S）转化为水和单质硫。该工艺的起点是在膜的一侧引入H2S。加热系统，使硫化氢气体热分解为氢气（H2）和硫。通过在膜表面沉积催化剂以促进分解，进一步促进该反应。形成的H2将被氧化成氢离子和一个电子，这些带电物质将被传导到膜上。膜的另一端将暴露在空气中，并涂上La0.9Sr0.1 CoO3催化剂。这种催化剂将介导迁移的H+和到达对面的电子与空气中的氧气形成水的反应。该工艺有望成为一种低成本的方法，从煤气化和重油脱硫的产物气体中去除硫化氢，从而使这些废弃气体符合环境排放法规。

This research is aimed at developing a perovskite membrane system for the conversion of hydrogen sulfide (H2S) into water and elemental sulfur. The starting point of the process is the introduction of H2S on one side of the membrane. The system is heated to cause the thermal decomposition of the hydrogen sulfide gas into hydrogen gas (H2) and sulfur. This reaction is further promoted by depositing a catalyst on the face of the membrane to promote the decomposition. The H2 formed will be oxidized to H+ and an electron, and these charged species will be conducted across the membrane. The opposite end of the membrane will be exposed to air and will be coated with a La0.9Sr0.1 CoO3 catalyst. This catalyst will mediate the reaction of the migrating H+ and electron species arriving at the opposite face with oxygen available from the air to form water. The process promises to be a low cost method for removing hydrogen sulfide from the product gases of coal gasification and heavy oil desulfurization, and thereby allowing these reject gases to conform to environmental emission regulations.