|2001 - Present||University Professor Emeritus, Iowa State University ‐ Department of Chemical and Biological Engineering|
|1994 - 2001||University Professor, Iowa State University ‐ Department of Chemical Engineering|
|1974 - 2001||Associate Scientist, Ames Laboratory|
|1964 - 1994||Professor, Iowa State University ‐ Department of Chemical Engineering|
|1961 - 1964||Associate Professor, Iowa State University ‐ Department of Chemical Engineering|
|1958 - 1961||Assistant Professor, Iowa State University ‐ Department of Chemical Engineering|
|1957 - 1958||Instructor, Iowa State University ‐ Department of Chemical Engineering|
|1951 - 1954||Chemical Engineer, FMC Corporation|
|1949 - 1951||Engineer, Chemical Equipment of California|
Combined catalyst and sorbent for hydrocarbon reforming, Calcium-based sorbent for desulfurizing hot coal gas, Method for regenerating a sulfided calcium-based sorbent, Coal beneficiation process, Coal gasification, Fluidization of sticky materials, Processes for decomposing calcium sulfate, and Electrofluid reactor development
|1958||PhD, PhD in Chemical Engineering, Iowa State University ‐ Department of Chemical Engineering|
|1949||BS, BS in Chemical Engineering, Iowa State University ‐ Department of Chemical Engineering|
Development of a combined catalyst and sorbent for the water gas shift reaction Industrial and Engineering Chemistry Research (2014)
A combined catalyst and sorbent was developed for reacting CO with steam to produce H2 in a single reaction stage at 600 °C by employing the water gas shift (WGS) reaction. The combined material was ...
Improving the stability of a CaO-based sorbent for CO 2 by thermal pretreatment Industrial and Engineering Chemistry Research (2011)
Although the reversible absorption of CO 2 by CaO at high temperature has been proposed as a promising method for capturing and removing CO 2 from hot gas streams produced by the combustion of fossil ...
Application of a combined catalyst and sorbent for steam reforming of methane Industrial and Engineering Chemistry Research (2010)
The performance of a combined catalyst and sorbent material designed for reforming hydrocarbons was evaluated by reacting methane with steam at different temperatures and pressures in a reactor packed with the material. The combined material ...
Development of a CaO-based CO2 sorbent with improved cyclic stability Industrial and Engineering Chemistry Research (2008)
The carbonation of CaO is an attractive method for removing CO2 from hot gas mixtures. However, regeneration and reuse of a CaO-based sorbent causes a gradual decline in absorption capacity, which ultimately limits the life ...
Physical Properties and Composition Effects on the Reactivity of Calcium-Based Sulfur Sorbents Industrial & Engineering Chemistry Research (2007)
A detailed comparison between agglomerated pellets of limestone and commercial-grade plaster of Paris was conducted to test the reactivity of the pellets with H2S over three cycles of sulfidation and regeneration. After multicycle testing with ...
A combined catalyst and sorbent for enhancing hydrogen production from coal or biomass Energy and Fuels (2007)
Future large-scale production of H2 for use as a clean fuel will likely depend upon gasifying coal or biomass followed by steam reforming the resulting gas mixture and separating the CO2 byproduct. The process of ...
Development of a novel combined catalyst and sorbent for hydrocarbon reforming Industrial and Engineering Chemistry Research (2005)
A combined catalyst and sorbent was prepared and utilized for steam reforming methane and propane in laboratory-scale systems. The material was prepared in the form of small spherical pellets having a layered structure such that ...
A Plausible Model for the Sulfidation of a Calcium-Based Core-in-Shell Sorbent Industrial & Engineering Chemistry Research (2003)
A promising reusable sorbent for desulfurizing hot coal gas is being developed in the form of core-in-shell pellets which consist of a highly reactive CaO core encased in a porous protective shell made largely of ...
A Regenerable Calcium-Based Core-in-Shell Sorbent for Desulfurizing Hot Coal Gas Industrial & Engineering Chemistry Research (2002)
A regenerable calcium-based sorbent was prepared by pelletizing either powdered limestone or calcium sulfate hemihydrate and then coating the pellets with an optimum mixture of powdered alumina and limestone. The pellets were subsequently calcined and ...
Utilization of Sulfur Oxides for the Production of Sodium Sulfate Industrial & Engineering Chemistry Process Design and Development (2002)
The use of coal and other fossil fuels generates large quantities of sulfurous byproducts which could find an outlet in the manufacture of Na2SO4. In this work, the feasibility of converting SO2 and SO3 into ...
Regeneration of Sulfided Calcium-Based Sorbents by a Cyclic Process Energy & Fuels (1996)
A unique process for regenerating calcium-based sorbents which are in the form of calcium sulfide was demonstrated by employing thermogravimetric analysis (TGA). The process converts calcium sulfide to calcium oxide by subjecting particles of the ...
Reductive decomposition of calcium sulfate with carbon monoxide: reaction mechanism Industrial & Engineering Chemistry Process Design and Development (1990)
When CaS04 was treated with a mixture of CO, COz, SOz, and Nz at 1150 "C in thermogravimetric analysis equipment, various reaction stages were identified, and the final product distribution was found to depend on ...
Role of induction time and other properties in the recovery of coal from aqueous suspensions by agglomeration with heptane Energy & Fuels (1989)
The percent recovery of fine coal or graphite particles suspended in water by agglomeration with heptane was highly dependent on the measured induction time, i.e., the gas bubble to particle attachment time of the material. ...
Oil agglomeration of weakly hydrophobic coals and coal/pyrite mixtures Energy & Fuels (1988)
Fine particle suspensions of various materials in water were agglomerated with heptane in a modified blender to determine the agglomeration characteristics of the solids. The materials included Upper Freeport coal, oxidized Upper Freeport coal, two ...
Behavior of Quartz, Kaolinite, and Pyrite during Alkaline Leaching of Coal Mineral Matter and Ash in Coal (1986)
Most of the mineral matter was extracted from Illinois No. 6 coal, a representative bituminous coal, by first leaching it with a hot alkaline solution and then with a dilute mineral acid. The alkalis employed, ...
Chemical Cleaning of Coal with Hot Alkaline Solutions Fossil Fuels Utilization, Environmental Concerns (1986)
Various bituminous coals were demineralized by an experimental two-step leaching process in which the ballmilled coals were first treated with a hot alkaline solution and then with a dilute mineral acid. Different alkalis and acids ...
Resource Recovery from Wastewater Treatment Sludge Containing Gypsum Proceedings of the 1984 National Waste Processing Conference (1984)
The disposal of wastewater treatment sludge generated at the Radford Army Ammunition Plant (RAAP) is a serious problem. The sludge is produced by neutralizing spent acid contained in the wastewater with lime, and consists principally ...
Evaluation of the Removal of Organic Sulfur from Coal New Approaches in Coal Chemistry (1981)
As the removal of sulfur from coal prior to combustion acquires more importance in order to meet evermore stringent antipollution regulations, research on the development of methods for the cleaning of coal continues to expand. ...
The Electrical Resistance of Gas Fluidized Beds Fluidization (1978)
The electrical resistance of fluidized beds of conducting particles is of both theoretical and practical interest. The bed resistance of carbonaceous solids has been measuredinseveral different laboratory systems using a four-point probe technique, It is ...
A Comparison of Coal Beneficiation Methods Coal Desulfurization (1977)
Although iron pyrites and other minerals are removed from coal on an industrial scale almost exclusively by gravity separation methods at the present time, other beneficiation methods are coming into use. Among the developing methods, ...
Desulfurizing Coal with Alkaline Solutions Containing Dissolved Oxygen Coal Desulfurization (1977)
The extraction of pyritic sulfur from coal by leaching the comminuted material with hot aqueous solutions containing dissolved oxygen has been demonstrated in numerous laboratory experiments (1-6). Although acidic solutions have generally been used for ...
Decomposition of Calcium Sulfate in a Two-Zone Reactor Industrial & Engineering Chemistry Process Design and Development (1975)
A new method of decomposing calcium sulfate has been demonstrated with a bench-scale fluidized bed reactor in which two reaction zones were established. A reducing zone was set up in the lower part of the ...
Hydrogen from Coal Char in a Continuous Electrofluid Reactor Industrial & Engineering Chemistry Process Design and Development (1974)
The production of a hydrogen-rich synthesis gas from coal char and steam was investigated in a 12-in. diameter, continuous electrofluid reactor. The reactor has been operated at temperatures approaching 2000°F and using both single and ...