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Message: An Ecological Friendly Utility for the 21st Century

An Ecological Friendly Utility for the 21st Century

posted on Jan 27, 2010 11:13PM

I also copied this article from an earlier Silvewrado website.

H2 POWER THE CREATION OF HYDROGEN TO GENERATE ELECTRICITY AND FUEL FUTURE CARS WITHOUT RELEASING SULFUR & NITROGEN GASES & PARTICLES TO THE ENVIRONMENT

THE UTILITY OF THE FUTURE WILL BE POWERED BY LOW-RANK COAL, America’s lowest cost energy resource and with reserves measured in centuries, not years or even decades, its most abundant natural energy resource. By utilizing technology developed by private industry as part of the US DOE’s Clean Coal Technology Program and Clean Coal Power Initiative, tomorrow’s utility will meet the most stringent air, water, and solid byproduct standards ever promulgated by the US Environmental Protection Agency. Furthermore, this utility will not contribute to global climate change by releasing any green house gases, since the only fuel produced will be H2, which will produce water when combusted in a gas turbine or used in a fuel cell. All the CO produced while making H2 from coal, air, and steam will be sequestered in underground reservoirs while enhancing oil recovery from declining oil fields.

The coal conversion and power generation process consists of the following unit operations. As soon as bulk low-rank coal enters into the Ecoplex the environmental drawbacks associated with the use of “dirty coal,” that is dust generation and tendency towards spontaneous combustion are eliminated. LRC is ground, mixed with water, most of which is recycled from the process, hydrothermally treated, and formulated into a concentrated, stable liquid fuel that is a low cost, non-hazardous alternative to oil. From this point forward the coal in low-rank coal-water fuel (LRCWF) is used sight unseen just like oil.

LRCWF is then fed at elevated pressures to an advanced high temperature slagging gasifier originally developed by Texaco and now available from GE. During gasification the C and H O in LRCWF is reacted with oxygen to produce carbon monoxide (CO) and hydrogen (H2). Here O rather than air is used in order to maintain temperatures above the melting point of the ash, most of which is removed as a molten slag. The slag is recovered as an inert glassy frit that will be sold for use in roadbeds and or high strength concrete. Small quantities of impurities such as sulfur and nitrogen oxides (SO and NO ) and particulates from coal ash (ROx) can be efficiently removed from the hot product gas by commercial processes, since the volume of gas is not diluted by a factor of four as it would be if air rather than oxygen was used as the gasifying agent.

In the next unit operation, synthesis gas (CO + H2) is reacted with water via the water gas shift reaction to generate additional H2, (CO + H2 + HO CO + 2 H2). The carbon dioxide can be separated efficiently from the hydrogen fuel via commercial processes and sold for use in enhanced oil recovery processes. The CO will be used to repressurize oil fields to increase oil production from declining US oil fields and remain sequestered in the underground formation.

In the last step H2 is the resultant fuel and can be used in an advanced GE gas turbine where it is burned in air to generate power and water. It could also be used to generate power in one of the advanced fuel cells now under development. In either case power is generated without the production of any greenhouse gases that could contribute to climate change. In addition to generating power cleanly from America’s most abundant natural energy resource this process would help to decrease dependence on imported oil, not only by the power generation, but by increasing production from our dwindling indigenous oil resources by means of pressurizing of oil wells with the CO which is a recovered saleable by-product of our process.

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