Analysis of Two Lunar Oxygen Production Processes
Frequently, chemical engineers must evaluate processes, design systems, and size equipment based on a chemical or physical reaction without the benefit of laboratory data or previous industrial...
A Modified Sulfate Process to Lunar Oxygen
A modified sulfate process which produces oxygen from iron oxide-bearing minerals in lunar soil is under development. Reaction rates of ilmenite in varying strength sulfuric acid have...
Production of Lunar Oxygen, Iron, Magnesium, and Silicon by Aqueous Hydrofluoric Acid Leaching
Aqueous hydrofluoric acid (HF) processing of lunar regolith offers the versatile options of lunar iron and oxygen production by room temperature electrolysis as well as the extraction...
Evaluation of Processing Options for Lunar Oxygen Production
Recent work on space resource utilization has lead to the identification of certain modifications of previously proposed processes which can be properly characterized as 'second generation'...
Mars Mission Designs: Comparing the Near Term Options
The benefits to be derived from manufacturing chemical rocket propellants from native resources on the Martlan surface are so great that it will almost certainly be a component of any...
Lunar Liquid Oxygen Production Facilities
Production of oxygen beyond Earth's gravity well has been shown to be an economic asset for interplanetary travel using chemical combustion propulsion. Requirements for lunar liquid oxygen...
On the Beneficiation and Comminution of Lunar Regolith
A major concern in the area of planning for future lunar missions and for establishing a lunar base is the selection of a chemical process for liberation of oxygen from lunar regolith...
Space Habitat Contaminant Growth Models?Part II
This paper reports on the continuation of work being done at NASA's Center for Space Environmental Health (CSEH) at the University of Colorado at Boulder on contaminant growth modelling...
Lunar Farside, Mars Polar Cap, and Mercury Polar Cap Neutrino Experiments
Neutrino detection offers unusual Civil Engineering challenges for the inner Solar System, including: outposts and permanent bases on the Moon, a novel development within the polar caps...
Evacuation Modeling Near a Chemical Stockpile Site
Dynamic evacuation modeling was used as an aid in emergency response planning by Tooele County, Utah, location of the United States' largest stockpile of unitary chemical weapons, The...
Modeling the Pathways of Nonconservative Substances in Estuaries
ELAmet is a model for nonconservative chemical transport which solves the advection/dispersion/transformation equation using a modification of Eulerian-Lagrangian methods. In this paper...
Adding Up Admixtures
The importance of preventive maintenance and lifecycle costs has put added emphasis on concrete performance. For many specifiers, chemical admixtures, added to concrete at the batch plant,...
Intersection Air Quality Analysis
Methods of carbon monoxide concentration estimation at or near intersections have recently undergone scrutiny with resulting debate on the proper and accurate ways to make these estimates...
Modeling Guideline for Air Quality Analysis of Intersections
Model evaluations have been performed testing eight different models for the ability to estimate carbon monoxide near intersections. These evaluation results along with the need for updated...
Assessing the Leaching Potential of Herbicides at the Ohio MSEA
The GLEAMS model was used to assess the potential for herbicide leaching at the Ohio MSEA. Input data, typical of the Ohio MSEA, was used in conjunction with precipitation data for the...
Interpreting Dredge Material Bioassay Data?COBIAA
Two types of sediment bioassays may be conducted in the regulatory evaluation of dredged material, toxicity tests and bioaccumulation tests. COBIAA (for the Consequences of Bioaccumulation...
Dual-System Cleanup
Engineers designing a ground water treatment system for a manufacturing plant in northern California, found that two systems are better�and cheaper�than one. Most of the ground water at...
Designing for Corrosion Control
This presentation will discuss designing from several aspects: a. Designing of the item to lessen the affects of corrosion. b. Selection of non-corrosive materials in the designing process...
Determination of Diffusivities of Sorbing and Nonsorbing Species in Rocks
Through-diffusion experiments were performed for the sorbing and nonsorbing species in granites. Determining methods of diffusivities were discussed according to sorption properties of...
Effects of Heterogeneity on Actinide Diffusion Rates in Tuffaceous Rock
The pore structure and mineralogy of Topopah Spring Tuff are heterogeneous on scales less than one cm. This heterogeneity creates spatial variation in transport rates for aqueous actinide...
Return to search