CAREER:Bi-Functional Redox Materials with Facilitated Oxygen Transport for Catalytic Conditioning of Biomass-Derived Syngas

项目编号：1254351机构：北卡罗莱纳州立大学标题：双功能氧化还原材料催化调节生物质衍生合成气生物质可以通过气化转化为电力，氢气和液体燃料。然而，去除焦油是生物质气化的一个关键挑战。现有的除焦油催化剂仅在外部氧化剂氧化还原催化剂存在的情况下对焦油重整和/或部分氧化有活性。这个项目将开发一种同时具有氧化剂功能的催化剂。氧化还原催化剂由用于氧存储的初级金属氧化物、用于O2-传输的混合离子-电子导体（MIEC）和用于焦油重整/氧化的催化活性表面组成。包埋的氧通过参与焦油氧化反应使催化剂更有活性。催化剂将在循环氧化还原模式下进行晶格氧补充。该项目将研究(i)氧化还原催化剂中的晶格O2-迁移和MIEC载体对催化剂活性的影响；（二）催化剂表面对其活性的影响及焦油氧化的表面反应方案；(3)氧化还原催化剂优化策略及性能评价。智力优势：该项目将致力于了解独特的氧化还原催化剂的表面反应和O2传导方案，该催化剂可以高效地去除焦油。除了作为活性催化剂外，嵌入的点阵氧可以通过MIEC支架穿梭到催化剂表面进行焦油氧化。即使在低孔隙率下，MIEC支架也可以通过创建固态O2通路来增加催化剂的烧结阻力。晶格氧还可以通过延缓焦炭形成和硫中毒来延长催化剂寿命。该研究对氧化还原催化剂的设计和优化具有重要的指导意义。更广泛的影响：开发一种有效的、强大的焦油去除催化剂可以成为部署基于气化的生物质到液体燃料工艺的关键一步。该项目将为设计优化催化剂提供基础见解。这一独特的概念与精心设计的研究计划相结合，可能会产生一种可行的催化剂，通过气化实现可持续的生物质转化。PI还将把他的研究与教育结合起来。为了激发K12学生对STEM和可持续能源的兴趣，PI将开发并向国内外观众展示一个名为“工程解决全球变暖”的互动模块。一个平行的苹果/安卓应用程序，“全球变暖的工程师工具箱”也将与北卡罗来纳州计算机科学系和阿贡国家实验室合作推出。

PI: Li, FanxingProposal Number: 1254351Institution: North Carolina State UniversityTitle: CAREER:Bi-Functional Redox Materials with Facilitated Oxygen Transport for Catalytic Conditioning of Biomass-Derived SyngasBiomass can be converted into electricity, hydrogen, and liquid fuels through gasification. However, the removal of tars represents a critical challenge to biomass gasification. The existing tar removal catalysts are only active for tar reforming and/or partial oxidation in the presence of an external oxidant, the redox catalyst. This project will develop a catalyst that also functions as a oxidant. The redox catalyst is composed of a primary metal oxide for oxygen storage, a mixed ionic-electronic conductor (MIEC) support for O2- transport, and a catalytically active surface for tar reforming/oxidation. The embedded oxygen can make the catalyst more active by participating in tar oxidation reactions. The catalyst will be operated under a cyclic redox mode for lattice oxygen replenishment. This project will investigate (i) lattice O2- migration in the redox catalyst and the effect of MIEC support on catalyst activity; (ii) the effect of catalyst surface on its activity and the surface reaction scheme for tar oxidation; (iii) redox catalyst optimization strategy and performance evaluations. Intellectual Merit: The project will devote a concerted effort towards understanding the surface reaction and O2- conduction schemes of the unique redox catalyst, which can be highly effective for tar removal. Besides acting as an active catalyst, the embedded lattice oxygen can be shuttled to the catalyst surface, by the MIEC support, for tar oxidation. The MIEC support will also increase the catalyst's sintering resistance by creating a solid-state O2- pathway even at low porosity. The lattice oxygen can also increase the catalyst lifetime by retarding coke formation and sulfur poisoning. The research will provide essential guidance on redox catalyst design and optimization.Broader Impact: Development of an effective and robust tar removal catalyst can be a key enabling step for the deployment of gasification based biomass-to-liquid fuel processes. This project will provide fundamental insights for designing an optimized catalyst. The unique concept coupled with the carefully designed research plan will likely to result in a viable catalyst for sustainable biomass conversion through gasification. The PI will also integrate his research with education. To inspire K12 students' interest in STEM and sustainable energy, the PI will develop and present an interactive module named "Engineering Our Way out of Global Warming" to both national and international audiences. A parallel Apple/Android App, "Engineer's Toolbox for Global Warming" will also be launched in collaboration with NC State Computer Science Department and Argonne National Lab.