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We preface this dispatch, concerning the efficient capture and separation of Carbon Dioxide from the flue gas of industrial processes that combust hydrocarbon fuel, especially Coal, by attempting to address the question of:
When technologies such as disclosed, for example, in our reports of:
Efficient Capture of Atmospheric CO2 | Research & Development; concerning: "United States Patent 7,993,432 - Air Collector ... for Capturing Ambient CO2; 2011; Kilimanjaro Energy, Inc.; Abstract: An apparatus for capture of CO2 from the atmosphere";
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No matter how we convert our abundant Coal into more versatile hydrocarbons, no matter how completely we utilize it's carbon content, there will, just as when we combust Coal for power generation, remain behind an inorganic mineral residue.
That residue is most often referred to and known most commonly as "fly ash", which most think of as settling out of exhaust gases, but larger and heavier agglomerations, "slag" and "clinker", are also formed.
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http://www.pre.ethz.ch/
In a number of previous reports, we've documented that Oxygen, concentrated to at least some extent, as opposed to unpurified air, is preferred for use in gasification procedures intended to produce, primarily, a blend of Carbon Monoxide and Hydrogen, a hydrocarbon synthesis gas, from Coal.
The use of purified Oxygen efficiently promotes exothermic reactions with Coal which enable the inclusion of other co-reactants, such as Steam and/or Carbon Dioxide, whose breakdown into their elemental constituents consumes a great deal of thermal energy; and, it does so without promoting or enabling the wasteful formation of Nitrogen Oxide pollutants, as would be the case if unpurified air were to be used.
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Energy Citations Database (ECD) - - Document #804531
The documents we enclose in this dispatch are further evidence that our own United States Department of Energy knows one heck of a lot about the conversion, the recycling, of Carbon Dioxide into hydrocarbon fuels; but, that they are, or at least were, trying to avoid talking too much about it.
The initial link in this dispatch takes you to a "Progress Report" concerning the course of a research project, undertaken for the USDOE by the University of Oklahoma, focused on the production of synthesis gas, suitable for catalytic condensation into liquid hydrocarbons, by reacting Methane with Carbon Dioxide.
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We've made numerous reports concerning the operation of a Coal liquefaction pilot plant, and the conduct of associated research activities, by the old Union Carbide Corporation in South Charleston, West Virginia.
Those good works, as seen, for just two examples, in:
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