60185 results about "Coal" patented technology

An underground radio communications and personnel tracking system uses a portable communications device worn by a miner when underground in a mine. A cap-lamp transceiver provides voice and text communication on ultra-low frequency (ULF) to ultra-high frequency (UHF) carrier frequencies and modulation adapted by programming of a software defined radio to making selective and agile radio contacts via through-the-earth, conductor/lifeline, coal seam, tunnel, and ionosphere/earth-surface waveguides for transmission of electromagnetic waves. These waveguides comprise layered earth coal and mineral deposits, and manmade mining complex infrastructures which serendipitously form efficient waveguides. Ultra-Low Frequency F1/F1 repeaters are placed underground in the mine, and providing for extended range of communication of the cap-lamp transceiver with radios and tracking devices above ground of the mine.

A method of generating and recovering gas from naturally existing subsurface formations Of coal, carbonaceous shale or organic-rich shales comprising the steps Of: injecting into fracture of the subsurface formation, under substantially anaerobic conditions, a consortia of selected anaerobic, biological microorganisms for in situ conversion of organic compounds in said formation into methane and other compounds; and producing methane through at least one well extending from said subsurface formation to the surfaces.

The present invention relates to catalyst-loaded coal compositions having a moisture content of less than about 6 wt %, a process for the preparation of catalyst-loaded coal compositions, and an integrated process for the gasification of the catalyst-loaded coal compositions. The catalyst-loaded coal compositions can be prepared by a diffusive catalyst loading process that provides for a highly dispersed catalyst that is predominantly associated with the coal matrix, such as by ion-exchange.

A round-shank bit for a coal cutting machine or the like, having a bit head and a bit shank, wherein the bit head has a bit tip, maintained by a base element in a receptacle of the bit head. Starting at the base element, the bit tip tapers in a direction toward the free end of the bit tip, wherein the base element forms a maximum diameter of the bit tip, and wherein the bit tip has recesses on its outer contour. In order to assure good rotational behavior over the entire length of the operating time, the base element has the recesses on an outer circumference forming the maximum diameter.

Particulate compositions are described comprising an intimate mixture of a coal and a gasification catalyst in the presence of steam to yield a plurality of gases including methane and at least one or more of hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and other higher hydrocarbons are formed. Processes are also provided for the preparation of the particulate compositions and converting the particulate composition into a plurality of gaseous products.

Particulate compositions are described comprising an intimate mixture of a coal and a gasification catalyst. The particulate compositions are gasified in the presence of steam to yield a plurality of gases including methane and at least one or more of hydrogen, carbon monoxide, carbon dioxide, hydrogen sulfide, ammonia and other higher hydrocarbons. Processes are also provided for the preparation of the particulate compositions and converting the particulate composition into a plurality of gaseous products.

Production of synthetic liquid hydrocarbon fuel from carbon containing moieties such as biomass, coal, methane, naphtha as a carbon source and hydrogen from a carbon-free energy source is disclosed. The biomass can be fed to a gasifier along with hydrogen, oxygen, steam and recycled carbon dioxide. The synthesis gas from the gasifier exhaust is sent to a liquid hydrocarbon conversion reactor to form liquid hydrocarbon molecules. Unreacted CO & H₂ can be recycled to the gasifier along with CO₂ from the liquid hydrocarbon conversion reactor system. Hydrogen can be obtained from electrolysis of water, thermo-chemical cycles or directly by using energy from carbon-free energy sources.

Bromine-containing compounds, added to the coal, or to the boiler combustion furnace, are used to enhance the oxidation of mercury, thereby enhancing the overall removal of mercury in downstream pollution control devices. The method is applicable to utility power plants equipped with wet FGD systems, as well as those plants equipped with spray dryer absorber FGD systems.

A high-pressure injection proppant system for stimulating coal bed methane production preloads proppant, such as sand, into one or more high-pressure vessels, for delivery into a fluid stream, such a N₂ gas stream. A screw auger arrangement meters the proppant volumes and rates into the fluid stream. Two such vessels operationally mounted in parallel can function separately or concurrently depending on the demand for proppant in a particular formation. The system provides for the injection of surfactants into the fluid stream to enhance the performance of the proppant, to aid in the placement of the proppant into a fracture network, and to demote proppant flowback during production and embedment. The system can be operated manually or by computer automation to aid in the accuracy of the mixing of the fluid stream components.

The invention discloses a road dust suppressant, which is prepared by mixing and blending 0.1-2.0% of water-soluble high molecular polymer, 20-50% of moisture absorption humectant, 1.0-5.0% of preservative, 0.5-5.0% of penetrating agent and the balance water. The road dust suppressant is a dynamic dust-proof and dust-suppressing liquid product which combines functions of wetting, bonding, permeating, adsorbing moisture and the like into a whole and has extremely strong pressurization-resistant function. The road dust suppressant has the advantages of obvious anti-evaporation performance and good water retention hygroscopicity, and dust on the road surface can be coagulated and is unlikely to fly. The road dust suppressant disclosed by the invention not only can be applied to road dust suppressing but also can be simultaneously used for the aspects, such as the mine exploration and transportation environment, storage yards of coal ash, coal and other ores, and the treatments of municipal construction earthwork dust raise.

Compositions and methods for forming hydrocarbon products from triglycerides are disclosed. In one aspect, the methods involve the thermal decomposition of fatty acids, which can be derived from the hydrolysis of triglycerides. The thermal decomposition products can be combined with low molecular weight olefins, such as Fischer-Tropsch synthesis products, and subjected to molecular averaging reactions. Alternatively, the products can be subjected to hydrocracking reactions, isomerization reactions, and the like. The products can be isolated in the gasoline, jet and/or diesel fuel ranges. Thus, vegetable oils and/or animal fats can be converted using water, catalysts, and heat, into conventional products in the gasoline, jet and/or diesel fuel ranges. These products are virtually indistinguishable from those derived from their petroleum-based analogs, except that they can have virtually no aromatic, sulfur or nitrogen content, they are derived, in whole or in part, from renewable resources, and can also be derived from domestically available coal and/or natural gas.

Disclosed herein, without limitation, are activated carbon honeycomb catalyst beds and systems for removing mercury and other toxic metals from a process stream, i.e, from flue gas of a coal combustion system. The activated carbon honeycomb can for example remove greater than 90% mercury from flue gas with a simple design and without adding material to the flue gas. Also disclosed herein, and without limitation, are methods for manufacturing and using the disclosed honeycomb catalyst beds and systems.

The invention relates to a hydraulic fracturing anti-reflection technology for pumping and exploring gas by drilling a hole in a coal mine well, comprising the following steps sequentially: (1) selecting a fracturing location; (2) determining the pressure type according to observed coal type, laneway arrangement and construction development degree, and ways of top soleplate bedding plane borehole hydraulic fracturing, top soleplate translamellar borehole hydraulic fracturing, the coal bed bedding plane borehole hydraulic fracturing or the coal bed translamellar borehole hydraulic fracturing can be adopted; (3) determining borehole parameters for constructing drilling, wherein, the borehole parameters include borehole length, borehole height, aperture, obliquity angle and azimuth angle; (4) designing the hydraulic fracturing, including injected water volume and injection pressure; (5) borehole washing; (6) draining; (7) examining the fracturing effect, if the fracturing effect is in accordance with the requirement, the following step is carried out, if not, turning to step (4); and (8) entering a pipeline for pumping and discharging. The technology enhances the air permeability of the coal bed, reduces the gas emission rate of an excavation working face, and obviously promotes the pumping and exploring capability and the pumping and exploring effect of the single borehole. The pumping and discharging efficiency is improved, the pumping and discharging time is shortened and the damage of the gas is maximally eliminated.

Processes and compositions are provided for decreasing emissions of mercury upon combustion of fuels such as coal. Various sorbent compositions are provided that contain components that reduce the level of mercury and/or sulfur emitted into the atmosphere upon burning of coal. In various embodiments, the sorbent compositions are added directly to the fuel before combustion; are added partially to the fuel before combustion and partially into the flue gas post combustion zone; or are added completely into the flue gas post combustion zone. In preferred embodiments, the sorbent compositions comprise a source of halogen and preferably a source of calcium. Among the halogens, iodine and bromine are preferred. In various embodiments, inorganic bromides make up a part of the sorbent compositions.

A method of making metallic iron in which a compact, containing iron oxide such as iron ore or the like and a carbonaceous reductant such as coal or the like, is used as material, and the iron oxide is reduced through the application of heat, thereby making metallic iron. In the course of this reduction, a shell composed of metallic iron is generated and grown on the surface of the compact, and slag aggregates inside the shell. This reduction continues until substantially no iron oxide is present within the metallic iron shell. Subsequently, heating is further performed to melt the metallic iron and slag. Molten metallic iron and molten slag are separated one from the other, thereby obtaining metallic iron with a relatively high metallization ratio. Through the employment of an apparatus for making metallic iron of the present invention, the above-described method is efficiently carried out, and metallic iron having a high iron purity can be made continuously as well as productively not only from iron oxide having a high iron content but also from iron oxide having a relatively low iron content.

This invention relates to systems and methods for converting biomass into highly inert carbon. Specifically, some embodiments densify the carbon into anthracite-style carbon aggregations and store it in geologically stable underground deposits. The use of certain embodiments yield a net effect of removing atmospheric carbon via the process of photosynthesis and converting it into hard coal, which can be stored in underground beds that mimic existing coal deposits which are known to be stable for thousands of years.