New Particle Formation Experiments: Nucleation and Growth
新的粒子形成实验:成核和生长
基本信息
- 批准号:1761638
- 负责人:
- 金额:$ 38.41万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2018
- 资助国家:美国
- 起止时间:2018-06-01 至 2022-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This project focuses on the formation and growth of new particles in the atmosphere. Laboratory experiments will be conducted to measure changes in the rate of new particle formation and growth with changes in composition, temperature, and relative humidity. The results are expected to lead to improved accuracy in predicting the impacts of new particle formation on climate, health and visibility.Laboratory research includes experiments to: (1) conduct measurements of nucleation rates in the ammonia - H2SO4 system as a function of reagent concentrations and temperature; (2) conduct measurements of the synergistic effect of ammonia on nucleation rates for the amine - H2SO4 system at low H2SO4 concentrations; (3) characterize growth rates using a Photolytic Flow Reactor with growth via H2SO4 and using a second flow reactor with growth agents injected in the vapor phase; (4) measure the nanoparticle size-dependency of the growth capabilities of select organic compounds; (5) estimate absolute growth rates (i.e., uptake efficiency) by incorporating measured gas-phase concentrations into model simulations; and (6) explore the capability of the Photolytic Flow Reactor as a tool for understanding growth via uptake of complex secondary oxidation products such as are produced in photo-oxidation of alpha-pinene.The Principal Investigator (PI) plans to use computational fluid dynamics (CFD) simulations of the flow reactor to bolster the interpretation of the experimental results. The CFD simulations allow for estimates of the free energies of small molecular clusters and extrapolations of the results to conditions in other experiments so that nucleation rates can be compared. The PI intends to compare the results from this project with global atmospheric particle formation measurements from the CERN CLOUD project.The project will help develop undergraduate research capabilities by exposing undergraduates to high-level experimental and computational work that will prepare them for careers in science.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
该项目的重点是大气中新粒子的形成和生长。 将进行实验室实验,以测量随着成分、温度和相对湿度的变化,新颗粒形成和生长速率的变化。 实验室研究包括:(1)测量氨-硫酸体系中的成核速率随反应物浓度和温度的变化;(2)在低H_2SO_4浓度下,测量氨对胺-H_2SO_4体系成核速率的协同效应;(3)使用通过H2SO 4生长的光解流动反应器和使用在气相中注入生长剂的第二流动反应器表征生长速率;(4)测量所选有机化合物的生长能力的纳米颗粒尺寸依赖性;(5)估计绝对增长率(即,吸收效率),将测量的气相浓度纳入模型模拟;及(6)探索光解流动反应器作为理解通过吸收复杂的二次氧化产物(例如在α-蒎烯的光氧化中产生的产物)的生长的工具的能力。首席研究员(PI)计划使用计算流体动力学(CFD)流动反应器的模拟,以支持实验结果的解释。 计算流体力学模拟允许小分子团簇的自由能的估计和外推的结果在其他实验中的条件,使成核率可以比较。 PI打算将该项目的结果与CERN CLOUD项目的全球大气颗粒物形成测量结果进行比较。该项目将通过让本科生接触高浓度的该奖项反映了NSF的法定使命,并被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准。
项目成果
期刊论文数量(5)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Measurement report: Sulfuric acid nucleation and experimental conditions in a photolytic flow reactor
测量报告:光解流反应器中的硫酸成核和实验条件
- DOI:10.5194/acp-21-1987-2021
- 发表时间:2021
- 期刊:
- 影响因子:6.3
- 作者:Hanson, David R.;Menheer, Seakh;Wentzel, Michael;Kunz, Joan
- 通讯作者:Kunz, Joan
H 2 SO 4 and particle production in a photolytic flow reactor: chemical modeling, cluster thermodynamics and contamination issues
H 2 SO 4 和光解流反应器中的颗粒产生:化学建模、团簇热力学和污染问题
- DOI:10.5194/acp-19-8999-2019
- 发表时间:2019
- 期刊:
- 影响因子:6.3
- 作者:Hanson, David R.;Abdullahi, Hussein;Menheer, Seakh;Vences, Joaquin;Alves, Michael R.;Kunz, Joan
- 通讯作者:Kunz, Joan
Effects of Precursor Structure on First-Generation Photo-Oxidation Organic Aerosol Formation
- DOI:10.3389/fenvs.2022.892389
- 发表时间:2022-06
- 期刊:
- 影响因子:0
- 作者:D. Sofio;D. Long;T. Kohls;J. Kunz;M. Wentzel;D. Hanson
- 通讯作者:D. Sofio;D. Long;T. Kohls;J. Kunz;M. Wentzel;D. Hanson
Semiempirical H 2 SO 4 –H 2 O Cluster Standard Gibbs Reaction Energies from Nucleation Experiments: Improved Temperature Dependence
成核实验中的半经验 H 2 SO 4 →H 2 O 簇标准吉布斯反应能量:改进的温度依赖性
- DOI:10.1021/acs.jpca.2c04737
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Hanson, David R.;Case, Amanda S.
- 通讯作者:Case, Amanda S.
Particle Formation from Photooxidation of αpinene, Limonene, and Myrcene
α蒎烯、柠檬烯和月桂烯的光氧化形成颗粒
- DOI:10.1021/acs.jpca.1c08427
- 发表时间:2022
- 期刊:
- 影响因子:0
- 作者:Hanson, David R.;Sawyer, Adam;Long, Darlene;Sofio, Dominick;Kunz, Joan;Wentzel, Michael
- 通讯作者:Wentzel, Michael
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David Hanson其他文献
Scientists need professional development to practice meaningful public engagement
科学家需要专业发展来实践有意义的公众参与
- DOI:
- 发表时间:
2022 - 期刊:
- 影响因子:3.9
- 作者:
K. Stofer;David Hanson;Kirsten Hecht - 通讯作者:
Kirsten Hecht
U.S. Gets Its Way on Approval of New Chemicals: International organization bows to U.S. pressure and allows nations to set their own rules for approving new chemicals for marketing
美国在批准新化学品方面如愿以偿:国际组织屈服于美国的压力,允许各国制定自己的规则来批准新化学品上市
- DOI:
10.1021/cen-v061n004.p035 - 发表时间:
1983 - 期刊:
- 影响因子:1.5
- 作者:
David Hanson - 通讯作者:
David Hanson
Quantum ghost imaging of undisturbed live plants
未受干扰的活植物的量子鬼成像
- DOI:
- 发表时间:
2024 - 期刊:
- 影响因子:0
- 作者:
Duncan P. Ryan;Kristina Meier;R. Sandoval;David Thompson;David Palmer;Raymond Newell;Kati Seitz;Demosthenes P. Morales;David Hanson;James H. Werner - 通讯作者:
James H. Werner
P50 Evaluating the Utilization of School Gardens in Florida Through a Teacher Survey
- DOI:
10.1016/j.jneb.2020.04.095 - 发表时间:
2020-07-01 - 期刊:
- 影响因子:
- 作者:
Crystal Almond;Michael Swain;David Hanson;Victoria Hunter Gibney;Karla Shelnutt - 通讯作者:
Karla Shelnutt
Challenges and opportunities for the built environment in a carbon-constrained world for the next 100 years and beyond
未来 100 年及以后碳约束世界中建筑环境的挑战和机遇
- DOI:
- 发表时间:
2024 - 期刊:
- 影响因子:3.4
- 作者:
Ah;Jonah M. Williams;Julio Friedmann;David Hanson;S. Kawashima;Volker Sick;Mahmoud Reda Taha;Jennifer Wilcox - 通讯作者:
Jennifer Wilcox
David Hanson的其他文献
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{{ truncateString('David Hanson', 18)}}的其他基金
NSF Engines Development Award: Leveraging innovations for water and energy security (NM, TX)
NSF 发动机开发奖:利用创新实现水和能源安全(新墨西哥、德克萨斯州)
- 批准号:
2315274 - 财政年份:2024
- 资助金额:
$ 38.41万 - 项目类别:
Cooperative Agreement
Atmospheric Particle Formation in Two Systems: Sulfuric Acid (H2SO4)/Water (H2O) plus Ammonia (NH3) and/or Amines, and Oxidation Products from Organic Compounds
两个系统中大气颗粒的形成:硫酸 (H2SO4)/水 (H2O) 加氨 (NH3) 和/或胺,以及有机化合物的氧化产物
- 批准号:
2232189 - 财政年份:2022
- 资助金额:
$ 38.41万 - 项目类别:
Standard Grant
Dimensions: Collaborative Research: Genome structure and adaptive evolution in peatmosses (Sphagnum): ecosystem engineers
维度:合作研究:泥炭藓(Sphagnum)的基因组结构和适应性进化:生态系统工程师
- 批准号:
1737951 - 财政年份:2017
- 资助金额:
$ 38.41万 - 项目类别:
Standard Grant
Collaborative Research: Recalibrating CO2 and water diffusion through leaves to improve models of photosynthetic responses to the environment
合作研究:重新校准二氧化碳和水通过叶子的扩散,以改进光合作用对环境的响应模型
- 批准号:
1658951 - 财政年份:2017
- 资助金额:
$ 38.41万 - 项目类别:
Continuing Grant
Nucleation Studies with Sulfuric Acid (H2SO4) and Nitrogenous Bases
硫酸 (H2SO4) 和含氮碱的成核研究
- 批准号:
1338706 - 财政年份:2014
- 资助金额:
$ 38.41万 - 项目类别:
Continuing Grant
RUI: Laboratory Studies of Particle Nucleation--Homogeneous Nucleation Involving Sulfuric Acid (H2SO4), Water (H2O), and Ammonia (NH3) Vapors
RUI:粒子成核的实验室研究——涉及硫酸 (H2SO4)、水 (H2O) 和氨 (NH3) 蒸气的均质成核
- 批准号:
0943721 - 财政年份:2010
- 资助金额:
$ 38.41万 - 项目类别:
Continuing Grant
Collaborative Research: Development of POGIL-IC Modules for General Chemistry
合作研究:普通化学 POGIL-IC 模块的开发
- 批准号:
0632957 - 财政年份:2007
- 资助金额:
$ 38.41万 - 项目类别:
Standard Grant
Collaborative Research: Light Enhanced 13C Enrichment of Dark Respired CO2: Implications for Leaf Internal CO2 Conductance and Respiration in the Light
合作研究:光增强暗呼吸 CO2 的 13C 富集:对叶片内部 CO2 电导和光呼吸的影响
- 批准号:
0719118 - 财政年份:2007
- 资助金额:
$ 38.41万 - 项目类别:
Standard Grant
STTR Phase I: An Actuated Skin for Robotic Facial Expressions
STTR 第一阶段:用于机器人面部表情的驱动皮肤
- 批准号:
0539852 - 财政年份:2006
- 资助金额:
$ 38.41万 - 项目类别:
Standard Grant
Development and Field Assessment of Web-Based Activities for General Chemistry
普通化学网络活动的开发和现场评估
- 批准号:
0341485 - 财政年份:2004
- 资助金额:
$ 38.41万 - 项目类别:
Standard Grant
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