Gtl Energy Holdings Pty Limited

Gtl Energy, Ltd.

Robert R French

Robert A Reeves

Charles B Benham

Patrick B Auell

The invention provides a method by which high moisture low rank coal or other carbonaceous material may be transformed into a high-energy, water resistant product. The raw feed is comminuted then mechanically compacted by a roller press with rolls of a specified profile to mobilize the inherent moisture and collapse most of the interstitial pore space. The mobilized moisture is then removed by low-temperature drying and the material is sized and shaped to form a product that is resistant to re-absorption of water or other liquids. The present invention will promote the use of low rank coal for liquefaction and gasification.

Roll press

The present invention provides methods of transforming low rank coals into high quality metallurgical coke, and the coke products produced by such methods.

Method of manufacturing coke from low grade coal

Methods of producing water-resistant solid fuels

Elastic ring

The invention provides low-cost, non-thermal methods to transform and beneficiate bulk materials, including low rank coals such as peat, lignite, brown coal, subbituminous coal, other carbonaceous solids or derived feedstock. High pressure compaction and comminution processes are linked to transform the solid materials by eliminating interstitial, capillary, pores, or other voids that are present in the materials and that may contain liquid, air or gases that are detrimental to the quality and performance of the bulk materials, thereby beneficiating the bulk products to provide premium feedstock for industrial or commercial uses, such as electric power generation, gasification, liquefaction, and carbon activation. The handling characteristics, dust mitigation aspects and combustion emissions of the products may also be improved.

Method to transform bulk material

The ash content of raw coals, lignite, and other carbonaceous materials is reduced by leaching the high-ash material with an aqueous acidic waste product produced by a Fischer-Tropsch reaction. The acidic aqueous waste is mixed with coal and process conditions are described. The claim takes advantage of using otherwise uneconomic coal, lignite or other carbonaceous material by upgrading the material to a suitable feedstock for combustion in a power plant or gasifier.

Method to upgrade low rank coal stocks

The invention provides a method by which low-rank coal may be processed to provide a high-energy feedstock for coal gasification and synthesis gas production. Preliminary coal, preparation, which may include washing and drying, is followed by wax-impregnation to produce a high-energy, low-moisture, stable feedstock. The wax is preferably obtained from an on-site Fischer-Tropsch reactor that also produces diesel fuel and naptha.

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Wellington, CO, United States of America

Robert R French