Improved Perovskite Membranes for the Stable and Selective Oxidative Coupling of Methane

改进的钙钛矿膜用于甲烷的稳定和选择性氧化偶联

• 批准号: 9812380
• 负责人: William Thomson
• 金额: $ 18.37万
• 依托单位: Washington State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-04-01 至 2002-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9812380&HistoricalAwards=false
• 关键词: Improved; Perovskite; Membranes; Stable; Selective

Professor William J. Thomson, of Washington State University, will continue prior research to develop the stability and selectivity of perovskite membranes for the oxidative coupling of methane. This research is warranted because the efficient conversion of methane can lead to a chemical industry based upon natural gas. The La, Sr, Co, Fe-perovskite membrane will be evaluated for stability and activity under low concentration of oxygen. To increase the membrane activity, the perovskite will be partially reduced, or it will be coated with standard Sm, Y, Ba, Li-doped MgO catalyst. The selectivity will be managed by means of the low concentration of oxygen afforded by the ionic conductivity of the perovskite. The kinetics of reaction will be measured under high pressure in an in-situ XRD cell, coupled with gas-phase analysis. The necessary characterization of solid and surface will be performed by collaborators at Pacific Northwest National Laboratory. This grant is given by the Kinetics, Catalysis and Molecular Processes program.

华盛顿州立大学的威廉·J·汤姆森教授将继续进行先前的研究，以开发用于甲烷氧化偶联的钙钛矿膜的稳定性和选择性。这项研究是有必要的，因为甲烷的高效转化可以导致以天然气为基础的化学工业。对La、Sr、Co、Fe钙钛矿膜在低氧浓度下的稳定性和活性进行了评价。为了提高膜的活性，可以对钙钛矿进行部分还原，或者在其表面包覆一层标准的Sm，Y，Ba，Li掺杂的氧化镁催化剂。选择性将通过钙钛矿的离子导电性提供的低浓度氧来管理。反应动力学将在高压下在原位X射线衍射池中测量，并结合气相分析。太平洋西北国家实验室的合作者将对固体和表面进行必要的表征。这项资助是由动力学、催化和分子过程计划提供的。