Showing papers on "Substitute natural gas published in 1975"

Fuel gas production

Abstract: A process is described for the production of methane from methanol by catalytic dehydration and dehydrogenation providing a high initial methane yield and a final substitute natural gas product of high calorific value. The catalytic dehydration and dehydrogenation steps may be effected simultaneously or in sequence. High efficiency in usage of raw materials and thermal requirements of the process are secured. A preferred catalyst containing both dehydration and dehydrogenation functions consists essentially of a major amount of iron oxide and minor amounts of chromium oxide and phosphate or tungstate ions.

Concurrent production of methanol and synthetic natural gas

Abstract: Methanol and synthetic natural gas are produced concurrently by introducing a carbonaceous material into a gasification zone, and thereafter, passing sequentially the synthesis gas thus formed through a water gas shift conversion zone, a sulfur compound and carbon dioxide removal zone, a methanol synthesis zone and a methanation zone.

Production of substitute natural gas from gasification of coal char

Abstract: A carbonaceous material is converted to a fuel gas which is fungible with natural gas by a combination of steps comprising gasifying the carbonaceous material in the presence of air and carbon dioxide, purifying the effluent stream and separating carbon monoxide therefrom, catalytically reacting steam with the separated carbon monoxide and recovering a methane-rich product gas

Process for producing combustible gases

Abstract: A process for producing a substitute natural gas from methanol, especially seaborne methanol liable to be contaminated with chloride, comprises catalytically reacting methanol vapor in a decomposition stage at an outlet temperature above 550° C, cooling the resulting gas by indirect heat exchange, preferably with water, to 250°-350° C, methanating the cooled gas with an outlet temperature of 500°-650° C, cooling the methanated gas by indirect heat exchange, preferably with methanol, and methanating the resulting gas in at least one further methanation stage. By avoiding the injection of liquid methanol, as had been previously proposed, for cooling the hot gas, the poisoning of catalysts by impurities such as chloride does not take place.

Process for producing synthetic natural gas and high octane motor fuel components

Abstract: Synthetic natural gas and high octane motor fuel blending stock is produced by catalytically reforming naphtha at low severity to maximize production of aromatics and minimize hydrocracking, and then converting the remaining paraffins to methane in a methanation zone. The effluent from the methanation zone is separated into synthetic natural gas and motor fuel blending stock.

Studies of the use of high-temperature nuclear heat from an HTGR for hydrogen production

Abstract: The results of a study which surveyed various methods of hydrogen production using nuclear and fossil energy are presented A description of these methods is provided, and efficiencies are calculated for each case The process designs of systems that utilize the heat from a general atomic high temperature gas cooled reactor with a steam methane reformer and feed the reformer with substitute natural gas manufactured from coal, using reforming temperatures, are presented The capital costs for these systems and the resultant hydrogen production price for these cases are discussed along with a research and development program

Coal gasification will increase supply and pricing problems

Abstract: Although deregulation of the price of natural gas, accelerated drilling and leasing, etc. will temporarily increase gas supplies and the importation of petroleum feedstocks and liquefied natural gas will also increase the near future supplies of natural gas (or its equivalent), there are only temporary solutions and the only long-range answer is the gasification of coal. In terms of efficiency of resource use, seventy percent of the heat in coal can be contained in the product gas, while the principal alternative (conversion to electricity) is only about half as efficient; also, high sulfur coals can be used in the process without causing air pollution (the sulfur may even be recovered as a by-product). Fuel gas derived from coal will cost more than natural gas and many problems may develop in determining the proper price, especially when the product is mixed with natural gas as seems likely in order to use the present distribution system (some of these problems are described briefly). (LTN)

The Direct Production of Methane from Heavy Hydrocarbons and Steam

Abstract: The direct production of methane from heavy hydrocarbons and steam, also known as the single reactor concept, is in its early stages of development. The concept was originated at the University of Wyoming and for the last two years has seen considerable attention at the Babcock and Wilcox Company. The product gas from this reaction contains primarily methane as the combustible constituent, therefore showing promise for use as substitute natural gas (SNG). An economic comparison of this concept, in comparison of other gasification processes currently being developed to produce SNG, shows it to be a more attractive process. The main disadvantage is that the concept has not been shown feasible on a continuous basis. The work carried out at the Babcock and Wilcox Research Center focuses on developing a fully continuous single reactor gasification process. A catalyst survey was conducted to determine what catalyst could be used effectively in the production of methane from hydrogen and carbon monoxide...