| 项目编号: | 1351384
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| 项目名称: | CAREER: Surface Crystallization of Reactive Oxygen Permeable Hydroxyapatite-based Membranes for Direct Methane Oxidative Conversion |
| 作者: | Dongxia Liu
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| 承担单位: | University of Maryland College Park
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| 批准年: | 2013
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| 开始日期: | 2014-08-01
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| 结束日期: | 2019-07-31
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| 资助金额: | USD400000
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Engineering - Chemical, Bioengineering, Environmental, and Transport Systems
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| 英文关键词: | ocm
; surface crystallization
; membrane nanostructure
; student
; catalysis
; research
; membrane material
; methane
; pb-hap-co3
; reactive oxygen permeable hydroxyapatite-based membrane
; oxygen transport kinetics
; dense membrane
; oxygen permeable property
; reactive oxygen
; career goal
; sufficient methane activation
; solid oxide membrane
; low cost methane
; reactive-oxygen permeable membrane
; membrane technology
; efficient ocm membrane reactor
; energy
; selective chemical conversion
; methane gas
; catalytic conversion
; pb-hap-co3 membrane
; direct methane oxidative conversionthe pi
; hap-based membrane
; methane reaction
; catalytic membrane reactor
; membrane reactor
; challenge
; energy conversion
|
| 英文摘要: | 1351384 - Liu
Abstract
CAREER: Surface Crystallization of Reactive Oxygen Permeable Hydroxyapatite-based Membranes for Direct Methane Oxidative Conversion
The PI's career goal is to create innovative catalyst and membrane technologies that enable active and selective chemical conversions with particular focus on the catalytic conversion of C1 and biomass feedstock. The objective is to establish reactive oxygen (O2) permeable hydroxyapatite (HAP)-based membranes for oxidative coupling of methane (OCM) to C2 hydrocarbons. While the field of catalytic membrane reactors has emerged solid oxide membranes for OCM, attaining high C2 yield, which intimately depends on the harmonization between the catalytic and O2 permeable properties of the membrane materials has remained a challenge. The unique approach of surface crystallization in controlling the membrane nanostructures (composition and constitution) will enable thin and dense membranes possessing sufficient methane activation and O2 permeation properties for OCM. Lead and carbonate substituted HAP (Pb-HAP-CO3) is the focus on the HAP-based membranes because Pb2+ and CO32-, respectively, endow a single HAP with good catalytic properties for OCM and high permeance for O2 transport. The rationale of this research is to systematically manipulate the composition (Pb2+ and CO32- concentration) and constitution (thickness and crystal orientation) of the Pb-HAP-CO3 membranes to tune their catalysis and transport properties, and thus, to achieve cooperative CH4 activation and O2 permeation in OCM for C2 production. The compelling aspect of this research is that it offers a specific strategy to create new and potentially transformative ways of converting low cost methane to value-added fuels and chemicals.
The PI?s educational goal is to provide learning experiences for students that will lead to success in educating the next generation of scientists and engineers, particularly in the fields of materials synthesis, catalysis, and energy. The research incorporates broad training in materials science and chemical engineering into research experiences and education programs for students at all levels. Particularly, this includes: (i) a new course development for educating undergraduates and graduates based on the PI?s research interests in materials, catalysis, separation, and energy; (ii) research experiences for students at all levels; and (iii) outreach programs for K-12 students and general public audiences. These educational activities are already in progress, and are well aligned with the goals of the PI's department and college.
Intellectual Merit: The underlying challenge in attaining high C2 yield from OCM reactions in membrane reactors is the scarcity of membrane materials with harmonized catalytic and oxygen permeable properties. This project will focus on fundamental studies to enable the emergence of reactive-oxygen permeable membranes for efficient OCM processes. The research activities will advance the understanding of (i) manipulation of membrane nanostructures by controlled surface crystallization approach, (ii) effects of membrane nanostructures on methane reaction and oxygen transport kinetics in tubular reactors, and (iii) predictive correlations of materials synthesis-structure- function for OCM performance. The fundamental concepts and technologies obtained from this work will stimulate and open new avenues of material discovery and technique development that can impact future energy and chemical supplies of the world.
Broader Impact: The processing of methane to derive highly value-added chemicals and fuels is one of the enormous challenges faced by science and society. The development of efficient OCM membrane reactors will lead to new thermochemical processes to meet the demand for high-energy density and fungible fuels/chemicals from methane gas to address this challenge. The proposed program integrates research on materials science and chemical engineering with an education and outreach component designed to highlight the importance of these disciplines in the area of energy conversion. Education will be enhanced by developing a new course based on the research interests in materials, catalysis, separation, and energy, by recruiting and mentoring students from under-represented communities in research activities, and by outreach programs for K-12 students and general public audience in Prince George's County, MD (where UMD is located). |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/96075
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Dongxia Liu. CAREER: Surface Crystallization of Reactive Oxygen Permeable Hydroxyapatite-based Membranes for Direct Methane Oxidative Conversion. 2013-01-01.
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