Showing papers on "Substitute natural gas published in 1984"

Production of synthetic natural gas from coal gasification liquid by-products

Abstract: In coal gasification processes for the production of synthetic natural gas by the reaction of coal with steam and oxygen under pressure to form a gasifier synthesis gas and a liquid hydrocarbon by-product, the liquid hydrocarbon by-product is treated for solids and metal removal and is then passed to a catalytic partial oxidation zone containing a monolithic platinum-palladium catalyst. The hydrocarbon by-product liquids are converted to secondary synthesis gas by being reacted with steam and oxygen. Optionally, the effluent from the catalytic partial oxidation zone may be passed through a second, steam reforming catalyst to react residual hydrocarbons with water to produce hydrogen and carbon oxides. The gasifier and secondary synthesis gases may be treated to remove acid gases therefrom and then methanated to provide a product synthetic natural gas.

Process for the production of substitute natural gas

Abstract: The invention relates to a process for the production of substitute natural gas from coke oven gas or other hydrogen- and methane-containing starting gases. For simpler and more economical processing it is proposed that the starting gas, purified or unpurified, is separated by selection of the molecular sieve in a PSA unit in such a manner that the flushing gas of the PSA unit can achieve substitute gas quality.

Preparation of gas with high calorific value from coke oven gas

Abstract: PURPOSE:To prepare hydrocarbon gas with a high calorific value, by mixing coke oven gas obtained by dry distillation of coal with producer gas obtained by gasification of a carbonaceous material and then reacting H2 with CO and/ or CO2 in the mixed gas. CONSTITUTION:Raw material coal is fed into a coke oven 1 for dry distillation. The resultant coke oven gas and producer gas obtained by gasification of a carbonaceous material (e.g. coke) in a producer 3 with separately supplied steam an oxygen or air, are led into a gas producer 2 for mixing, condensation, removal of tar, desulfurization, removal of ammonia and naphthalene, etc. to obtain a raw material gas. The raw material gas is fed into substitute natural gas producing equipment 6, where the pressure is raised to above 5 atm with a pressurizing device 7, and is introduced into a reaction tower 9 via a gas purifier 8 for interaction of H2 and CO and/or CO2 in the mixed gas in the presence of a catalyst (e.g. Co supported by silica) to produce hydrocarbon.

Synthetic natural gas from coal by the Exxon catalytic coal gasification process

Abstract: Description du procede Exxon de conversion de charbon en GNS par gazeification catalytique. Analyse thermodynamique simplifiee de celui-ci. Analyse economique previsionnelle d'une installation produisant 64760 millions de kcal/jour

Industrial coal gasification: technology, applications and economics

Abstract: Conversion of coal into low Btu gas is a viable alternative to fuel oil and natural gas. The conversion of coal into a low BTU gas is becoming a more attractive alternative to natural gas and fuel oil in the industrial community. With the time proven technology of fixed bed gasifiers, the wide range of applications and the large fuel cost savings available, industrial coal gasification has much to offer American industry. This technology, the numerous applications of producer gas being used today, and the economics that favorably impact these low BTU gas users are discussed.

Process for the catalytic reforming of pyrolysates from solid fuels and organic wastes

Abstract: For refining pyrolysis products into marketable products such as synthetic natural gas, gasoline, diesel and raw materials for the chemical industry, the pyrolysis of solid fuels and organic wastes is coupled with the catalytic reforming of the pyrolysate in one process step. Acidic mineral catalysts (for example aluminosilicates) are either directly mixed with the fuel or arranged spatially separately in the reaction space. Depending on the composition of the starting products and the desired end products, extraneous steam is fed for reforming.

Molten carbonate fuel cells for coal and natural gas fuels

Abstract: System designs of molten carbonate fuel cell power plants are described for central stations using coal and on-site generators operating on natural gas. Fuel-to-busbar efficiencies are near 50% in coal based systems with turbine bottoming and in simple gas based systems. Coal based systems with more advanced but not fully developed components, and more complex gas based systems approach 60% efficiency.

Biothermal conversion of biomass and wastes to methane

Abstract: This paper describes the BIOTHERMGAS process for conversion of biomass and wastes to substitute natural gas (SNG) and/or medium-Btu gas. This process combines biological and thermochemical unit operations into a scheme that can efficiently convert the full spectrum of biomass or waste feedstocks (regardless of moisture and nutrient contents) to methane or other fuel products with minimum process residues. The BIOTHERMGAS process employs biogasification followed by thermochemical gasification of dewatered refractory digester residues. Nitrogen and other inorganic nutrients are recycled from the thermal process effluent to the biogasification unit. The product gas from the thermochemical gasifier can be converted to methane either by catalytic methanation or by biomethanation. The waste heat from thermal product gases is used to supply the heat requirement of the bioconversion component. The preliminary systems analyses were conducted on five applications of the BIOTHERMGAS process: three using biomass (Bermuda grass) and two using municipal wastes as feedstocks. Results indicate that this process is technically superior to either biological or thermochemical processes. The results of preliminary economic analyses and laboratory studies also show this process to be economically and technically feasible.