Mark J. Rood

University of Illinois Urbana-Champaign

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Massoud Rostam‐Abadi

Illinois Archaeological Survey

Sotiria Koloutsou‐Vakakis

University of Illinois Urbana-Champaign

K. James Hay

United States Department of the Army

Zifeng Yan

China University of Petroleum, East China

Byung J. Kim

University of Illinois Urbana-Champaign

Christian M. Carrico

New Mexico Institute of Mining and Technology

Ke Du

University of Calgary

Michael R. Kemme

United States Army

Hamidreza Emamipour

University of Illinois Urbana-Champaign

John D. Atkinson

University at Buffalo, State University of New York

Cooperative Institutions

University of Illinois Urbana-Champaign

111

China University of Petroleum, East China

University of Washington

Chinese Academy of Sciences

National Oceanic and Atmospheric Administration

Illinois Archaeological Survey

United States Geological Survey

China University of Petroleum, Beijing

University of Illinois System

State Key Laboratory of Heavy Oil

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Water adsorption with hysteresis effect onto microporous activated carbon fabrics

Adsorption (2007)

Patrick D. Sullivan Brenton R. Stone Zaher Hashisho Mark J. Rood

Carbon fibers

10.1007/s10450-007-9033-5

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Citations (68)

Adsorption and Electrothermal Desorption of Hazardous Organic Vapors

Journal of Environmental Engineering (2001)

Patrick D. Sullivan Mark J. Rood K. James Hay S. Qi

In 1997, 6.04 × 108 kg of hazardous air pollutants were emitted into the atmosphere from the United States. A bench-scale activated-carbon fiber-cloth adsorption, electrothermal desorption, and condensation system was designed, built, and operated to demonstrate its ability to capture and recover organic hazardous air pollutants from airstreams. The annular-cartridge configuration of the activated-carbon fiber cloth allows low pressure drop and rapid electrothermal regeneration. Adsorption and electrothermal desorption cycling of the system with an airstream containing 1,000 ppmv methyl ethyl ketone (MEK) resulted in closure within 8% by mass. Competitive adsorption between water vapor and MEK reduced MEK adsorption capacity 43% as relative humidity of the gas increased from 4 to 90% at 22°C dry-bulb temperature. Increasing the dry-bulb temperature of the gas stream by 10°C at a constant dew-point temperature resulted in a 37% increase in MEK adsorption compared to the high relative humidity test case, while allowing the water vapor to penetrate the adsorber. The automated system achieves MEK capture efficiency >99.9% by mass while recovering the liquid MEK for reuse.

10.1061/(asce)0733-9372(2001)127:3(217)

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Hygroscopic properties of spray dryer sorbents

Mark J. Rood Terrence K. Boyer

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Equilibrium and Heat of Adsorption for Water Vapor and Activated Carbon

Journal of Environmental Engineering (2000)

Shaoying Qi K. James Hay Mark J. Rood Mark P. Cal

The Qi-Hay-Rood adsorption isotherm equation is shown to provide an improved description of equilibrium water vapor adsorption onto microporous activated carbon between 298 and 373 K and total pressure at 101 kPa, when compared with an existing isotherm model. The influence of temperature on the isotherm equation's parameters is also quantified. An expression for the isosteric heat of adsorption is derived from the Clausius-Clapeyron equation. It is shown that the isosteric heat of adsorption decreases with increasing temperature and increasing adsorption capacity of water vapor. This new isotherm model can be inverted to describe water vapor concentration dependence on adsorption capacity and is therefore well suited for use in dynamic models for activated-carbon adsorption systems.

Sorption isotherm

10.1061/(asce)0733-9372(2000)126:3(267)

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Citations (41)

Open burning and open detonation PM₁₀ mass emission factor measurements with optical remote sensing

Journal of the Air & Waste Management Association (2013)

Wangki Yuen David L. Johnsen Sotiria Koloutsou‐Vakakis Mark J. Rood Byung J. Kim

Emission factors (EFs) of particulate matter with aerodynamic diameter ≤10 µm (PM10) from the open burning/open detonation (OB/OD) of energetic materials were measured using a hybrid-optical remote sensing (hybrid-ORS) method. This method is based on the measurement of range-resolved PM backscattering values with a micropulse light detection and ranging (LIDAR; MPL) device. Field measurements were completed during March 2010 at Tooele Army Depot, Utah, which is an arid continental site. PM10 EFs were quantified for OB of M1 propellant and OD of 2,4,6-trinitrotoluene (TNT). EFs from this study are compared with previous OB/OD measurements reported in the literature that have been determined with point measurements either in enclosed or ambient environments, and with concurrent airborne point measurements. PM10 mass EFs, determined with the hybrid-ORS method, were 7.8 × 10−3 kg PM10/kg M1 from OB of M1 propellant, and 0.20 kg PM10/kg TNT from OD of TNT. Compared with previous results reported in the literature, the hybrid-ORS method EFs were 13% larger for OB and 174% larger for OD. Compared with the concurrent airborne measurements, EF values from the hybrid-ORS method were 37% larger for OB and 54% larger for OD. For TNT, no statistically significant differences were observed for the EFs measured during the detonation of 22.7 and 45.4 kg of TNT, supporting that the total amount of detonated mass in this mass range does not have an effect on the EFs for OD of TNT.

Mass concentration (chemistry)

Trinitrotoluene

10.1080/10962247.2013.851045

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Citations (3)

Editor's Note

Journal of Environmental Engineering (2003)

Mark J. Rood

10.1061/(asce)0733-9372(2003)129:8(683)

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Natural gas storage with activated carbon from a bituminous coal

Gas Separation & Purification (1996)

Jian Sun Mark J. Rood Massoud Rostam‐Abadi A.A. Lizzio

Bituminous coal

Carbon fibers

Specific surface area

BET theory

10.1016/0950-4214(96)00009-6

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Citations (40)

Adsorbed Natural Gas Storage with Activated Carbons Made from Illinois Coals and Scrap Tires

Energy & Fuels (1997)

Jian Sun T.A. Brady Mark J. Rood C. Lehmann Massoud Rostam‐Abadi

Activated carbons for natural gas storage were produced from Illinois bituminous coals (IBC-102 and IBC-106) and scrap tires by physical activation with steam or CO2 and by chemical activation with KOH, H3PO4, or ZnCl2. The products were characterized for N2-BET area, micropore volume, bulk density, pore size distribution, and volumetric methane storage capacity (Vm/Vs). Vm/Vs values for Illinois coal-derived carbons ranged from 54 to 83 cm3/cm3, which are 35−55% of a target value of 150 cm3/cm3. Both granular and pelletized carbons made with preoxidized Illinois coal gave higher micropore volumes and larger Vm/Vs values than those made without preoxidation. This confirmed that preoxidation is a desirable step in the production of carbons from caking materials. Pelletization of preoxidized IBC-106 coal, followed by steam activation, resulted in the highest Vm/Vs value. With roughly the same micropore volume, pelletization alone increased Vm/Vs of coal carbon by 10%. Tire-derived carbons had Vm/Vs values ranging from 44 to 53 cm3/cm3, lower than those of coal carbons due to their lower bulk densities. Pelletization of the tire carbons increased bulk density up to 160%. However, this increase was offset by a decrease in micropore volume of the pelletized materials, presumably due to the pellet binder. As a result, Vm/Vs values were about the same for granular and pelletized tire carbons. Compared with coal carbons, tire carbons had a higher percentage of mesopores and macropores.

Pelletizing

Caking

Bituminous coal

Corncob

Scrap

Carbon fibers

10.1021/ef960201h

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Citations (56)

Editor's Note

Journal of Environmental Engineering (2003)

Mark J. Rood

10.1061/(asce)0733-9372(2003)129:4(283)

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Adsorption in single-walled carbon nanotubes by experiments and molecular simulation I: Determining fraction of open-ended Nanotubes in samples

05AIChE: 2005 AIChE Annual Meeting and Fall Showcase (2005)

Sandeep Agnihotri José P. B. Mota Massoud Rostam‐Abadi Mark J. Rood

This study describes a procedure of using grand canonical Monte Carlo simulations for structural characterization of single-walled carbon nanotube (SWNT) samples. Simulations of nitrogen adsorption were performed on the external and internal surface of homogenous arrays of SWNTs of diameters previously determined from Raman spectroscopy of the samples. The results showed the importance of peripheral grooves on a nanotube bundle and the insensitivity of nanotube diameter towards adsorption on the external surface of a bundle. Simulations also revealed that samples containing thin nanotubes would have less internal and more external adsorption than those comprising of large diameter nanotubes. The total adsorption inside nanotubes could be adjusted by a parameter (between 0 and 1) that resulted in a near perfect fit between simulated and experimental values. This parameter can be interpreted as the fraction of open-ended nanotubes in the sample.

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