Abstract: A method of removing polluting noxious substances from a flow of flue-gas including sulfur dioxide, nitric oxides and heavy metals is disclosed. The method consists of passing the flue-gas material through sized-reduced leonardite to assure that it will have a high display of adsorption capacities. The Leonardite is superior to commercially available carbonized char products such as activated carbon, as well as the traditional lignite coke material.
Type:
Grant
Filed:
July 2, 1993
Date of Patent:
April 11, 1995
Assignee:
University of North Dakota Energy and Environmental Research Center Foundation
Abstract: A process of preparing lignite (low rank) coal filter material, suitable for use in lieu of more expensive activated carbon filter materials, is disclosed. The process comprises size reducing Leonardite coal material to a suitable filtering effective size, and thereafter heating the size reduced Leonardite preferably to at least 750.degree. C. in the presence of a flow of an inert gas.
Type:
Grant
Filed:
August 3, 1992
Date of Patent:
October 19, 1993
Assignee:
University of North Dakota Energy and Environment Research Center Foundation
Abstract: A selectively-sized, raw, low-rank coal is processed to produce a low ash and relative water-free agglomerate with an enhanced heating value and a hardness sufficient to produce a non-decrepitating, shippable fuel. The low-rank coal is treated, under high shear conditions, in the first stage to cause ash reduction and subsequent surface modification which is necessary to facilitate agglomerate formation. In the second stage the treated low-rank coal is contacted with bridging and binding oils under low shear conditions to produce agglomerates of selected size. The bridging and binding oils may be coal or petroleum derived. The process incorporates a thermal deoiling step whereby the bridging oil may be completely or partially recovered from the agglomerate; whereas, partial recovery of the bridging oil functions to leave as an agglomerate binder, the heavy constituents of the bridging oil. The recovered oil is suitable for recycling to the agglomeration step or can serve as a value-added product.
Type:
Grant
Filed:
July 12, 1991
Date of Patent:
November 10, 1992
Assignee:
University of North Dakota School of Engineering & Mines Foundation (UND-SEM Foundation)
Inventors:
Curtis L. Knudson, Ronald C. Timpe, Todd A. Potas, Raymond A. DeWall, Mark A. Musich
Abstract: A method of improving control of atmospheric emission of particulate matter from the emission stack of coal combustion facilities which employ baghouse particle controllers is disclosed. The method involves injecting upstream of the baghouse a small but conditioning effective amount of ammonia gas and sulfur trioxide in sequence. When this is done, the pressure drop across the baghouse is less and the amount of particulate matter in the smoke stack emissions is reduced by significant amounts.
Type:
Grant
Filed:
May 23, 1990
Date of Patent:
July 23, 1991
Assignee:
The University of North Dakota School of Engineering & Mines Foundation (UND-SEM Foundation)
Abstract: A low-rank coal oil agglomeration process. High mineral content, a high ash content subbituminous coals are effectively agglomerated with a bridging oil which is partially water soluble and capable of entering the pore structure, and usually coal derived.
Type:
Grant
Filed:
September 28, 1989
Date of Patent:
July 16, 1991
Assignee:
The University of North Dakota School of Engineering & Mines Foundation (UNDSEM Foundation)
Abstract: A method of preparing C-5 substituted nucleotides by reacting a C-5 posit mercurated nucleoside with an alkyl or aryl disulfide in the presence of palladium(II) ion. The resulting new method for attaching linker arms to nucleic acids (DNA,RNA) provides a wide ranging reaction far more useful than those heretofore developed, and allows preparation of modified components with linking reactive functionality that allows usefulness as probes, therapeutics, and for DNA sequencing.
Type:
Grant
Filed:
April 11, 1988
Date of Patent:
January 8, 1991
Assignee:
University of North Dakota School of Engineering & Mines Foundation
Abstract: A method of improving control of atmospheric emission of particulate matter from the emission stack of coal combustion facilities which employ baghouse particle controllers is disclosed. The method involves injecting upstream of the baghouse a small but effective amount of ammonia gas and sulfur trioxide. When this is done, the pressure drop across the baghouse is less and the amount of particulate matter in the smoke stack emissions is reduced by significant amounts.
Type:
Grant
Filed:
July 3, 1989
Date of Patent:
June 5, 1990
Assignee:
The University of North Dakota School of Engineering & Mines Foundation