Ion Conducting Perovskites as Catalytic Membranes for the Oxidative Coupling of Methane

摘要：CTS-9521721研究了全致密（无孔）离子导电钙钛矿作为膜反应器中甲烷氧化偶联催化膜的可行性。这是巴特尔太平洋西北实验室（Battelle Pacific Northwest Laboratories）和华盛顿州立大学（Washington State University）之间的合作成果。巴特尔太平洋西北实验室负责制备和表征这种膜，华盛顿州立大学负责进行反应器研究。将研究两种膜，一种是镧-锶-钴-铁-氧系统，另一种是镧-钡-钴-铁-氧系统。氧渗透和催化选择性的测量是在高压下进行的。动态x射线衍射用于监测膜的稳定性。甲烷氧化偶联是一个将天然气在一个步骤中转化为有价值的化学原料的过程。尽管它具有明显的吸引力，但使用这种方法的成本效益技术一直难以捉摸。这个项目结合了催化科学、反应器设计和新材料的进步来解决这个问题。＊＊＊

ABSTRACT CTS-9521721 This is a study of the feasibility of using fully densified (nonporous) ion-conducting perovskites as catalytic membranes in membrane reactors for the oxidative coupling of methane. It is a collaborative effort between Battelle Pacific Northwest Laboratories, who prepares and characterizes the membranes, and Washington State University, which performs the reactor studies. Two membranes will be studied, one a lanthanum-strontium-cobalt-iron-oxygen system, the other a lanthanum-barium-cobalt-iron-oxygen system. Measurements of oxygen permeation and catalytic selectivity are done at elevated pressures. Dynamic X-ray diffraction is used to monitor the stability of the membrane. Oxidative coupling of methane is a process that converts natural gas to a valuable chemical feedstock in a single step. Despite its obvious attractiveness, a cost-effective technology using this approach has been elusive. This project combines advances in catalytic science, reactor design, and new materials to this problem. ***