| 项目编号: | 1438004
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| 项目名称: | Temporal Resolution in Fast Pyrolysis of Lignocellulosic Biomass |
| 作者: | Young-Jin Lee
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| 承担单位: | Iowa State University
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| 批准年: | 2013
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| 开始日期: | 2014-09-01
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| 结束日期: | 2018-08-31
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| 资助金额: | USD300000
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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: | cellulose pyrolysis
; pyrolysis
; lignin pyrolysis
; molten phase pyrolysis
; solid biomass material
; fast pyrolysis
; pyrolysis initiaty
; high-resolution mass spectrometer
; project
; technical descriptionpyrolysis
; high temporal resolution
; processing plant biomass
; pyrolysis process
; lignocellulosic biomass
; sub-second temporal resolution
; solid surface pyrolysis
; measure pyrolysis product
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| 英文摘要: | Principal Investigator: Young-Jin Lee
Number: 1438004
Biomass from plants is a feedstock for the production of biofuels. One route for processing plant biomass into liquid transportation fuels is to rapidly heat up the solid biomass material in the absence of air, a process called pyrolysis. Pyrolysis initiaties a series of complicated decomposition reactions to produce a complex mixture of liquid hydrocarbons, gases, and carbon-rich char. This research project will use a novel apparatus to study the complicated reactions of pyrolysis in real time and measure pyrolysis products very accurately at reaction times of under one second. From this fundamental information, detailed reaction models will be developed, which can be used to improve the performance of pyrolysis processes to produce liquid hydrocarbon fuels, guide chemical reactor design and scale-up, and accellerate process development leading to commercialization. Education and broadening participation activities provided through this project feature a summer academy for middle school science teachers on the subject of biorenewables and the bioeconomy.
Technical Description
Pyrolysis is a process for conversion of biomass to a complex mixture of hydrocarbon liquids, gases, and carbon-rich char where solid biomass material is rapidly heated in the absence of air to initiate a series of thermal decomposition reactions. The goal of this project is to study the product distribution in fast pyrolysis of lignocellulosic biomass in real time. This research will be enabled by a unique micro reactor where a fast-scanning, high-resolution mass spectrometer is attached to a drop-tube micro-furnace pyrolyzer. This configuration is capable of monitoring the fate of each molecular product with sub-second temporal resolution. The research will characterize the molecular kinetics for fast pyrolysis of glucose-based carbohydrates, investigate molten phase and conduction effect in cellulose pyrolysis, and explore lignin pyrolysis in high temporal resolution. It is hypothesized that cellulose pyrolysis occurs in two distinct time steps, one narrow-time profile and one broad profile, which are attributed to solid surface pyrolysis and molten phase pyrolysis, respectively. The pure reaction kinetics of cellulose and lignin pyrolysis on extremely thin film where molten phase reaction is can be ignored will be investigated. Details of elementary chemical reactions in cellulose pyrolysis will be further explored by systematically studying the pyrolysis of glucose-based carbohydrates for various chain lengths and glycosidic bondage types. A wide range of film thicknesses will be studied in order to monitor the transition from isothermal kinetics to conduction-limited kinetics. This will also reveal how molten phase pyrolysis is influenced by sample size and how it contributes to the final product distributions.
Education and broadening participation activities provided through this project feature a summer academy for middle school science teachers on the subject of biorenewables and the bioeconomy, sponsored by the NSF Engineering Research Center for Biorenewable Chemicals (CBiRC) and the NSF EPSCoR program at Iowa State University. This project will support and closely collaborate with one of the participating teachers in the preparation of classroom materials about bio-oils. College and high school students will be exposed to the biorenewables technology through this project, including under-represented minority students in Science Bound program. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/95918
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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: | |
Young-Jin Lee. Temporal Resolution in Fast Pyrolysis of Lignocellulosic Biomass. 2013-01-01.
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