A5031901188- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Carbon Dioxide Capture Technologies
- Industrial Gas Emission Control
- Catalytic Processes in Materials Science
- Atmospheric Ozone and Climate
- Gas Sensing Nanomaterials and Sensors
- Air Quality and Health Impacts
- Air Quality Monitoring and Forecasting
- Atmospheric and Environmental Gas Dynamics
- Odor and Emission Control Technologies
- Zeolite Catalysis and Synthesis
- Carbon Nanotubes in Composites
- Adsorption and Cooling Systems
- Vehicle emissions and performance
- Aerosol Filtration and Electrostatic Precipitation
- Wind and Air Flow Studies
- Phase Equilibria and Thermodynamics
- Membrane Separation and Gas Transport
- Supercapacitor Materials and Fabrication
- Plasma Applications and Diagnostics
- Mercury impact and mitigation studies
- Aeolian processes and effects
- Mesoporous Materials and Catalysis
- Nanopore and Nanochannel Transport Studies
University of Illinois Urbana-Champaign
2011-2021
Urbana University
2019-2020
China University of Petroleum, East China
2014-2018
State Key Laboratory of Heavy Oil
2014
U.S. Army Engineer Research and Development Center
2007-2011
Texas A&M University – Kingsville
2011
Construction Engineering Research Laboratory
2000-2008
United States Geological Survey
1998-2006
Illinois Archaeological Survey
1998-2006
University of Tennessee at Knoxville
2006
The Ron Brown cruise during ACE‐Asia (March–April 2001) encountered complex aerosol that at times was dominated by marine, polluted, volcanic, and dust aerosols. Average total light scattering coefficients (σ sp for D p <10 μm, relative humidity (RH) = 19%, λ 550 nm) ranged from 23 (marine) to 181 Mm −1 (dust). Aerosol hygroscopicity deliquescent with hysteresis (marine frequently polluted variably) hygroscopic without (volcanic) nearly hygrophobic (dust‐dominated). deliquescence...
Atmospheric aerosol particles consisting of ammonium sulfate [(NH4)2SO4] or sodium chloride (NaCl) have reasonably well-defined hygroscopic properties compared to other materials in particles, such as organic material. The effect internally mixing compounds with these salts is not clear when considering the resulting including activation clouds. This research describes dodecyl (SDS) and NaCl solute. SDS used a surrogate for soluble atmospheric surfactants. Köhler theory model droplet while...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdsorption characteristics of trace volatile organic compounds in gas streams onto activated carbon fibersK. L. Foster, R. G. Fuerman, J. Economy, S. M. Larson, and RoodCite this: Chem. Mater. 1992, 4, 5, 1068–1073Publication Date (Print):September 1, 1992Publication History Published online1 May 2002Published inissue 1 September 1992https://pubs.acs.org/doi/10.1021/cm00023a026https://doi.org/10.1021/cm00023a026research-articleACS...
Laboratory studies were conducted to determine the role of sulfur functional groups and micropore surface area carbon-based adsorbents on adsorption Hg0 from simulated coal combustion flue gases. In this study, raw activated carbon fibers that are microporous (ACF-20) impregnated with elemental between 250 650 °C. The resulting samples saturated respect content. Total content ACF decreased increasing impregnation temperatures 500 °C then remained constant Results K-edge X-ray absorption...
Measurements during recent field campaigns downwind of the Indian subcontinent, Asia, and northeastern United States reveal a substantial decrease in relative humidity dependence light scattering, f σsp (RH), with increasing mass fraction particulate organic matter (POM) for submicrometer aerosol. Using data from INDOEX (INDian Ocean EXperiment), ACE Asia (Aerosol Characterization Experiment – Asia), ICARTT (International Consortium Atmospheric Research on Transport Transformation), we have...
The removal of SO2 from simulated gas streams (N2/O2/H2O/SO2) is experimentally investigated using a dielectric barrier discharge, and by computer modeling. Conversion to primarily H2SO4 found be limited the generation OH radicals. Increasing concentrations O2 H2O increases radicals results in more streams. Removal efficiencies ≳80% were achieved. Results model suggest that efficient obtained with series short, high E/N current pulses rather than single, low pulse. also uv illumination...
During the Asian Pacific Regional Aerosol Characterization Experiment (ACE‐Asia) intensive field campaign conducted in spring of 2001, aerosol properties were measured on board R/V Ronald H. Brown to study effects atmospheric chemistry and climate downwind regions. marine boundary layer included chemical composition; number size distribution; light scattering, hemispheric backscattering, absorption coefficients. In addition, optical depth vertical profiles 180° backscatter measured. within...
Sodium-ion batteries (SIBs) attract more attention because of sodium's abundant availability, affordable price, and potential to be an effective anode material. Meanwhile, carbon-based materials provide the most promising materials. Because large radius sodium ions, SIBs do not exhibit favorable electrochemical performance. Introducing heteroatoms into carbon-lattice is strategy enlarge interlayer space which can improve carbon's In addition, with a surface-induced capacitive process enhance...
The objective of this work is to investigate the surface acidity γ-Al2O3 after modification and its application in reducing coke formation fluid catalytic cracking (FCC) process. with rich Brönsted acid sites reduced Lewis was prepared by sol–gel method using NH4BF4 as a modifier develop new functional material adjust acidity. N2 sorption, powder X-ray diffraction (XRD), 27Al magic angle spinning nuclear magnetic resonance (27Al MAS NMR) spectroscopy, photoelectron spectroscopy (XPS),...
Compressible and ultralight all-carbon materials are promising candidates for piezoresistive pressure sensors. Although several fabrication methods have been developed, the required elasticity fatigue resistance of yet to be satisfied as a result energy loss structure-derived failure. Herein, we present two-stage solvothermal freeze-casting approach fabricate aerogel [modified graphene (MGA)] with multi-arched structure, which is enabled by in-depth reduction oxide unidirectional ice-crystal...
Large uncertainties remain in understanding the effects of ambient aerosols on climate. As part First Aerosol Characterization Experiment (ACE 1, November 15 to December 15, 1995), total light scattering and backscattering coefficients by particles (σ sp σ bsp ) were measured at Cape Grim, Tasmania. Such measurements made characterize aerosol radiative forcing relevant climate change a southern hemisphere site. A controlled relative humidity (RH) nephelometry system (humidograph) was used...
Aerosol light scattering and absorption properties relevant to climate change were measured as part of the Characterization Experiment 2 (ACE-2, 15 June 25 July 1997) at Sagres, Portugal, a site receiving anthropogenically perturbed air masses from Europe. A controlled relative humidity (RH) nephelometry system dependence total backscattering coefficients by particles (σsp σbsp , respectively) upon increasing decreasing RH, maximum particle diameter (Dp) size cut, wavelength scattered (λ)....
A procedure, combining molecular simulation, Raman spectroscopy, and standard nitrogen adsorption, is developed for structural characterization of single-walled carbon nanotube (SWNT) samples. Grand canonical Monte Carlo simulations adsorption are performed on the external internal sites homogeneous arrays SWNTs diameters previously determined by spectroscopy sample. The results show importance peripheral grooves a bundle at low relative pressure insensitivity diameter toward surface higher...
Carbonaceous and noncarbonaceous adsorbents were impregnated with elemental sulfur to evaluate the chemical physical properties of their equilibrium mercury adsorption capacities. Simulated coal combustion flue gas conditions used determine capacities for Hg0 HgCl2 gases better understand how remove from streams generated by coal-fired utility power plants. Sulfur was deposited onto monolayer surface deposition or volume pore filling. impregnation increased total content decreased micropore...
Hexane adsorption on single-walled carbon nanotube (SWNT) bundles is studied by both simulation and experimentally using a previously developed computer-aided methodology, which employed smaller physisorbed probe molecule, nitrogen, to explore the porosity of samples. Configurational-bias grand canonical Monte Carlo hexane localized sites carried out predict their external surface in internal sites. These isotherms are then combined into global isotherm for given sample knowledge its...