UNS: Collaborative Research: Multiple-Scale Investigation of Chemical Looping with Oxygen Carrier Uncoupling

UNS：合作研究：载氧体解偶联化学循环的多尺度研究

• 批准号: 1510900
• 负责人: Fanxing Li
• 金额: $ 30.92万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-05-01 至 2020-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1510900&HistoricalAwards=false
• 关键词: UNS; Collaborative; Research; Multiple; Scale

Collaborative Proposals#1511818 / P.I.: Tian, Hanjiang#1510900 / P.I.: Li, FanxingThis research is expected to provide fundamental knowledge and scientific foundation for addressing CO2 capture and sequestration (CCS) from coal combustion, one of the most crucial areas of environmental sustainability. Among various CCS technologies, CLOU, a CLC scheme optimized for solid-fuel combustion (e.g., coal), represents one of the most promising options. Enabled by metal-oxide-based oxygen carriers capable of oxygen release and uptake under varying oxygen partial pressures, CLOU indirectly converts coal into separate streams of sequestration-ready CO2- and N2-rich flue gas via cyclic reactions. Consequently, the energy penalty associated with CO2 separation is inherently avoided. Compared to oxy-fuel combustion, the energy-intensive cryogenic oxygen separation is replaced by facile oxygen transfer enabled by the oxygen carrier, leading to significant improvement of carbon-capture efficiency. To date, most research in this area follows a trial-and-error approach due to lack of scientific understanding on the mechanism of coal-oxygen carrier interaction. Such an inefficient approach not only introduces potential uncertainties in technology and economics, but it also limits the progress of the development and implementation of CLC. The research is driven by the urgent needs for developing new scientific understanding and innovative tools and methodologies to investigate coal-oxygen carrier interaction and kinetics, oxygen-carrier optimization, and reactor and process simulations. The research will establish a solid theoretical groundwork for CLOU development from atomic level to reactor and process scales. These fundamental studies also are expected to lead to exciting discovery of novel catalytic-system and reactor configurations benefiting other research areas such as novel schemes for oxygen production, biomass combustion, coal/biomass gasification, and SOx/NOx emission control. Chemical Looping Combustion with Oxygen Carrier Uncoupling, a.k.a. CLOU, represents a unique combustion scheme that is directly related yet notably different from conventional combustion processes. It allows efficient fossil fuel combustion with minimal energy penalty for CO2 separation. Initiated by six leading U.S./Chinese research groups in the areas of both conventional and Chemical Looping Combustion (CLC), this multidisciplinary team brings together top chemical engineers, thermal engineers, mechanical engineers, and catalysis scientists to answer critical, interrelated scientific questions in combustion kinetics, surface reactions, oxygen-carrier development, thermal engineering, and reactor/process modeling, spanning from atomic level to reactor and process scales. Fundamental findings obtained from the proposed research are expected to significantly accelerate the development and deployment of CLOU for efficient coal combustion with integrated CO2 capture. The fundamental research focuses on four aspects: 1) lattice oxygen diffusion, surface reaction, and gas-phase combustion kinetics in a metal-oxide-assisted char/volatile oxidation scheme; 2) oxygen-carrier interactions with coal ash and impurities; 3) oxygen-carrier stability and performance evaluation in circulating fluidized bed CLC reactors, and 4) reactor and process modeling.These collaborative grants are co-funded by the Global Venture Fund (GVF) of NSF's International Science and Engineering section (ISE) and the CBET/ENG Combustion and Fire and Environmental Sustainability programs.

合作提案＃1511818 / P.I。：汉江＃1510900 / p.i。：LI，fanxingthis This Research预计将为解决CO2捕获和隔离（CCS）提供基本知识和科学基础，以解决来自煤炭燃烧的co2捕获和隔离（CCS），这是环境可持续性最重要的领域之一。在各种CCS技术中，Clou是一种针对固体燃料燃烧（例如煤炭）优化的CLC方案，代表了最有希望的选择之一。通过金属氧化物氧载体能够在不同的氧部分压力下释放和吸收氧气，Clou通过环状反应间接地将煤转化为单独的可隔离二氧化碳和富含N2的烟气的流。因此，与二氧化碳分离相关的能量惩罚是固有避免的。与氧燃料燃烧相比，能源密集型的低温氧分离被氧载体启用的轻松氧转移所取代，从而显着提高了碳捕获效率。迄今为止，由于对煤氧载体相互作用的机制缺乏科学了解，因此该领域的大多数研究都遵循试验方法。这种低效的方法不仅引入了技术和经济学的潜在不确定性，而且还限制了CLC的开发和实施进展。这项研究是由开发新的科学理解和创新工具和方法的迫切需求驱动的，以研究煤氧载体相互作用和动力学，氧气载体优化以及反应器和过程模拟。这项研究将为Clou从原子水平到反应器和过程量表建立坚实的理论基础。这些基本研究还有望导致对新颖的催化系统和反应堆构型的令人兴奋的发现，从而使其他研究领域（例如用于氧气生产，生物质燃烧，煤炭/生物质气化以及SOX/NOX排放控制的新方案）。用氧载体解偶联的化学循环燃烧又称Clou是一种独特的燃烧方案，该方案直接相关，但与常规燃烧过程截然不同。它允许有效的化石燃料燃烧，而二氧化碳分离的能量损失最少。该多学科团队由常规和化学循环燃烧区域（CLC）领域的六个领先的美国/中国研究小组发起，将顶级的化学工程师，热工程师，机械工程师和催化科学家汇集在一起​​，回答关键，在燃烧动力学，氧气反应，氧化范围和反应器中，以及反应器，反应器和反应器，反应器，并相互关联的科学问题过程量表。预计从拟议的研究中获得的基本发现将显着加速Clou的开发和部署，以通过综合二氧化碳捕获有效地加速煤炭燃烧。基本研究的重点是四个方面：1）在金属氧化物辅助的CHAR/挥发性氧化方案中，晶格氧扩散，表面反应和气相燃烧动力学； 2）氧气载体与煤灰和杂质的相互作用； 3）氧气载体稳定性和循环流动性床CLC反应器中的绩效评估，以及4）反应器和过程建模。这些协作赠款由NSF的国际科学与工程科（ISE）的全球风险基金（GVF）共同资助，以及CBET/ENG燃烧和环境和环境可持续性。