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

PI：Li，范兴提议编号：1254351机构：北卡罗来纳州立大学标题：Career：用于生物质合成气催化调节的双功能氧传输氧化还原材料生物质可通过气化转化为电能、氢气和液体燃料。然而，焦油的去除是生物质气化的一个关键挑战。现有的焦油脱除催化剂只有在外部氧化剂氧化还原催化剂存在的情况下才能对焦油重整和/或部分氧化起作用。该项目将开发一种兼具氧化剂功能的催化剂。氧化还原催化剂由用于储氧的初级金属氧化物、用于O2-传输的混合离子-电子导体(MIEC)载体和用于焦油重整/氧化的催化活性表面组成。嵌入的氧可以通过参与焦油氧化反应而使催化剂更具活性。催化剂将在循环氧化还原模式下运行，以补充晶格氧。本项目将研究(I)氧化还原催化剂中晶格O2-的迁移和MIEC载体对催化剂活性的影响；(Ii)催化剂表面对其活性的影响和焦油氧化的表面反应方案；(Iii)氧化还原催化剂的优化策略和性能评估。智力优势：该项目将致力于共同努力了解独特的氧化还原催化剂的表面反应和O2-传导机制，这种催化剂可以非常有效地去除焦油。嵌入的晶格氧除了作为活性催化剂外，还可以通过MIEC载体穿梭到催化剂表面，用于焦油的氧化。MIEC载体还将提高催化剂的耐烧结性，因为即使在低孔隙率的情况下，也会产生固态O2-途径。晶格氧还可以延缓结焦和硫中毒，从而延长催化剂的寿命。这项研究将为氧化还原催化剂的设计和优化提供必要的指导。广泛的影响：开发有效和坚固的焦油脱除催化剂可能是部署基于气化的生物质转化为液体燃料过程的关键一步。该项目将为优化催化剂的设计提供基本的见解。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将开发并向国内和国际观众展示一个名为“我们走出全球变暖的道路”的互动模块。此外，还将与北卡罗来纳州计算机科学部和阿贡国家实验室合作推出苹果/安卓并行应用程序--“全球变暖工程师工具箱”。

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.