Abstract:
Compounds of Group I alkali metals i.e., Na, K, Li, or mixtures thereof are added to the feed to the reaction zone of a partial oxidation synthesis gas generator in order to raise the level of said alkali metals to a value in the range of about 350 to 13,000 parts per million (basis weight of hydrocarbonaceous fuel feed), or more. By this means, the partial oxidation reaction may be improved. Soot formation is reduced or oxygen consumption is decreased, or both. Further, the subject process may be useful for the recovery of naturally-occurring metal values that may be present in the hydrocarbonaceous fuel feed. Thus heavy metal compounds of Ni, V, and Fe in the hydrocarbonaceous fuel may be fluxed with said alkali metals in the reaction zone of the gas generator to facilitate their separation from the process gas stream, and to extend the life of the refractory lining of the reaction zone.
Abstract:
Methane-rich gases are produced from naphtha or kerosene-type feedstocks having an upper boiling point of 250*C. The hydrocarbons are reacted with water vapor at elevated temperatures and pressures of from 15 to 100 atmospheres in the presence of a nickel-based catalyst in two reaction zones. In the first zone, 40-50 percent of preheated vaporized hydrocarbon is mixed and reacted with 80-90 percent of the water vapor required for the overall reaction. The product gas from the first reaction zone is cooled and mixed with the remaining vaporized hydrocarbons and the remaining water vapor and is then fed to the second reaction zone. The reaction conditions in both zones are such that the temperature of the catalyst in both zones is in the range 300*-500*C. The reaction is preferably carried out in the presence of a catalyst which is 50 to 60 weight percent nickel on a magnesium spinel support.
Abstract:
Heavy hydrocarbons are treated with steam in the presence of a non-molten particulate alkali metal containing catalyst to produce a methane-containing vapourous product. At least a portion of the vaporous product is converted to additional methane in a second stage in the presence of the non-molten alkali metal containing catalyst. Each of the stages is operated at pressures above 200 psig and temperatures between about 1,000* and 1,500*F.
Abstract:
NICKEL CATALYSTS, OFTEN SUPPORTED ON ALUMINA, ARE USED IN PRIMARY AND SECONDARY REFORMERS FOR THE STEAM REFORMING OF HYDROCARBONS. IF SUCH CATALYSTS CONTAIN LESS THAN 30 P.P.M. MAXIMUM SODIUM OR POTASSIUM OR BOTH, THE PROBLEM OF THE FOULING OF WASTE HEAT BOILERS IS ALLEVIATED.
Abstract:
APPARATUS FOR PRODUCTION OF SYNTHETIC PIPELINE GAS OF DESIRED HEATING VALUE BY INTEGRATING ASYSTEM OF PRODUCING SYNTHETIC GAS FROM A CARBONACEOUS MATERIAL IN A GAS GENERATOR WITH A SYSTEM OF PROCESSING A LIQUEFIED NATURAL GAS WHEREBY THE LEANER OUTPUT FROM THE GAS GENERATOR IS ADVANTAGEOUSLY COMBINED WITH THE RICHER OUTPUT FROM THE LIQUEFIED NATURAL GAS SYSTEM TO PROVIDE THE DESIRED GAS HEATING VALUE, AND THE COLD TEMPERATURES OF THE LIQUEFIED NATURAL GAS SYSTEM IS ADVANTAGEOUSLY UTILIZED IN THE GAS GENERATOR SYSTEM.
Abstract:
Process for the production of a methane-rich gas stream from a hydrocarbonaceous feedstock with all steps being carried out at or slightly above the desired pressure of delivery. Effluent gas from a free-flow partial-oxidation synthesis-gas generator, and preferably containing from about 10-26 volume percent methane on a dry basis is reacted with steam and without a catalyst at a temperature in the range of 2,800 to 1,500* F. to produce a stream of shifted gases having a mole ratio H2/CO in the range of 1.5 to 4 and preferably about 3. The shifted gases are then processed by the steps of scrubbing with a liquid hydrocarbon to recover particulate carbon, cooling to condense out water and volatile hydrocarbons, purifying by eliminating H2S and CO2 in a separation zone, and catalytically reacting the remaining H2 and CO in the process gas stream to produce a process gas stream comprising at least 45 volume percent methane on a dry basis.
Abstract:
FOR THE CATALYTIC STEAM REFORMING OF HYDROCARBONS, A NOVEL CATALYST COMPOSITION SUBSTANTIALLY FREE OF ALKALI METAL OXIDE AND (A) A CARRIER COMPRISING 70-100% UNCOMBINED MAGNESIA, 0.30% OF A SPINELLE. THE LATTER BEING A PRODUCT OF MAGNESIA COMBINED WITH AN OXIDE OF TRIVALENT METAL, AND 0-15% OF SIO2 IN THE FORM OF AN ALUMINUM SILICATE, AND (B) A CATALYTICALLY ACTIVE METAL SELECTED FROM THE GROUP CONSISTING OF COBALT, NICKEL AND MIXTURES THEREOF. AT LEAST A PORTION OF THE ACTIVE METAL IS IN THE FORM OF A COATING ON THE INTERNAL POROUS SURFACES OF THE CARRIER. THIS CATALYST HAS A LONG LIFE AND IN PARTICULAR DOES NOT LEAD TO CARBON BLACK FORMATION.
Abstract:
A continuous process of steam reforming hydrocarbons with decreased carbon-lay-down is carried out over a substantially alkali-free catalyst comprising nickel or cobalt metal and the dioxide of zirconium on a pre-formed refractory support.