Chemical Looping Beyond Combustion: Syngas Production From Methane in a Periodically Operated Fixed-Bed Reactor
燃烧之外的化学循环:在定期运行的固定床反应器中利用甲烷生产合成气
基本信息
- 批准号:1159853
- 负责人:
- 金额:$ 34万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2012
- 资助国家:美国
- 起止时间:2012-05-15 至 2016-04-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Intellectual Merit: Periodically operated fixed-bed reactors are an emerging type of catalytic reactors with increasing application in energy and environmental applications. The present project aims to demonstrate the application of chemical looping, an emerging combustion technology, to the partial oxidation of methane to synthesis gas in a periodically operated fixed-bed reactor configuration. The resulting process has significant practical advantages (alleviating safety concerns in methane partial oxidation by avoiding direct contact between methane and oxygen, and allowing direct utilization of air without diluting the syngas with nitrogen), and will at the same time allow the investigation of the dynamics of coupled endothermal/exothermal gas-solid reactions in periodic fixed-bed reactors. The project team will furthermore extend the chemical looping principle onto a fully multifunctional reactor design by integrating desulfurization of the product stream, resulting in a strongly intensified, highly scalable, and efficient syngas process.The approach builds on a combination of materials synthesis, reactor design and experimentation, and reactor modeling, and involves specifically the following steps:- Design and construction of a fixed-bed reactor with high-resolution in-situ measurement of kinetics and spatio-temporal reactor dynamics;- Synthesis, characterization, and evaluation of high-performance nanostructured materials as oxygen carriers and partial oxidation catalysts;- Detailed reactor experimentation, including evaluation of key reactor operating parameters (co- and counter-current flow pattern, periodicity, etc.) on reactor dynamics and process efficiency;- Integration of S-capture and separation, and- Reactor modeling and detailed reactor simulation.Overall, the main objectives of this research are (1) to advance our understanding of the dynamics of periodically operated fixed-bed reactors with heat-integration (specifically for gas-solid reactions) through a combination of experiments and reactor modeling; (2) to demonstrate the great potential of chemical looping (CL) beyond combustion (including integrated contaminant separation) and further establish the advantages of fixed-bed CL processes; and (3) to highlight the exciting possibilities of state-of-the-art nanomaterials as ?enablers? for advanced reactor engineering concepts .The project will advance our knowledge and current understanding of periodically operated of fixed-bed reactors, specifically for gas-solid reactions, an area with importance well beyond chemical looping. It will furthermore highlight the enabling role that emerging nanomaterials can play in the realization of advanced reactor concepts. Finally, it will help to further establish and broaden ?chemical looping? applications by demonstrating the simultaneous use of chemical looping for a partial oxidation reaction combined with contaminants removal, and, through thorough experimental and model based analysis, lay the groundwork for extending the concept onto a broad range of new applications.Broader Impact: Demonstration of a novel, compact, efficient, and safe reactor concept for natural gas utilization could have broad impact at a time where proven domestic gas reserves in the US are seeing explosive growth. Furthermore, this technology could enable the use of small-scale distributed sources, such as landfill gas and agricultural waste gas, resulting in tangible environmental benefits. The project will contribute to the education of graduate and undergraduate students, and involve outreach to high school students from underrepresented groups. Finally, active distribution of the developed methodologies and tools through collaborations, publications and conference contributions will help to foster partnerships and make the advances available to the scientific community at large.
智力优势:定期操作的固定床反应器是一种新兴的催化反应器类型,在能源和环境应用中的应用越来越多。本项目的目的是展示化学链这一新兴燃烧技术在定期操作的固定床反应器配置中将甲烷部分氧化为合成气的应用。所得到的方法具有显着的实际优势(缓解甲烷部分氧化的安全问题,避免甲烷和氧气之间的直接接触,并允许直接利用空气,而不稀释的合成气与氮气),并将在同一时间允许耦合吸热/放热气-固反应的动力学的定期固定床反应器的调查。该项目团队还将通过整合产品流的脱硫,将化学循环原理扩展到全功能反应器设计中,从而实现高度强化、高度可扩展和高效的合成气工艺。该方法建立在材料合成、反应器设计和实验以及反应器建模的基础上,具体包括以下步骤:- 设计和建造固定床反应器,具有动力学和时空反应器动力学的高分辨率原位测量;-作为氧载体和部分氧化催化剂的高性能纳米结构材料的合成、表征和评估;- 详细的反应堆实验,包括关键反应堆运行参数的评估(同向和逆流流动模式、周期性等)本研究的主要目的是:(1)提高我们对具有热集成的周期性操作固定床反应器的动力学的理解(特别是对于气固反应)通过实验和反应器建模的组合;(2)证明化学循环(CL)超越燃烧(包括综合污染物分离)的巨大潜力,并进一步建立固定床CL工艺的优势;(3)强调最先进的纳米材料作为?推动者?先进的反应器工程概念。该项目将推进我们的知识和目前的理解定期操作的固定床反应器,特别是气固反应,一个领域的重要性远远超出化学循环。它还将强调新兴纳米材料在实现先进反应堆概念方面可以发挥的促进作用。最后,它将有助于进一步建立和扩大?化学循环?通过展示同时使用化学循环进行部分氧化反应和污染物去除,为应用提供了新的思路,并通过全面的实验和基于模型的分析,为将这一概念扩展到广泛的新应用奠定了基础。展示了一种新颖、紧凑、高效、在美国国内已探明天然气储量爆炸性增长的情况下,天然气利用的安全反应堆概念可能会产生广泛的影响。此外,这项技术还可以利用小规模的分布式来源,如垃圾填埋气和农业废气,从而产生切实的环境效益。该项目将促进研究生和本科生的教育,并涉及向代表性不足群体的高中生开展外联活动。最后,通过合作、出版物和会议捐款积极传播所开发的方法和工具,将有助于促进伙伴关系,并向广大科学界提供所取得的进展。
项目成果
期刊论文数量(0)
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科研奖励数量(0)
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Goetz Veser其他文献
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Towards Assessing and Mitigating the Toxicity of Metal Nanoparticles
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- 批准号:
1236258 - 财政年份:2013
- 资助金额:
$ 34万 - 项目类别:
Standard Grant
Towards Understanding Nanocomposite Materials: Multiscale Tailoring for Thermally Stable and Accessible Nanoparticles
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0553365 - 财政年份:2006
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$ 34万 - 项目类别:
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- 批准号:
0448147 - 财政年份:2005
- 资助金额:
$ 34万 - 项目类别:
Standard Grant
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