Abstract:
Gasifying liquid hydrocarbon fuels, and in particular liquid heavy hydrocarbon fuels, at high fuel-to-air equivalence ratios with no significant soot formation comprises the steps of mixing the fuel and heated air in a prevaporization and mixing zone to prevaporize only a portion of the liquid fuel using only the sensible heat in the air, passing the partially vaporized fuel-air mixture through a catalyst zone to catalytically combust at least some of the prevaporized portion of the fuel while simultaneously, without the use of an external heat source, vaporizing and gasifying as-yet unvaporized fuel using the additional heat generated by the catalytic combustion, wherein the length of the catalyst zone, the catalyst configuration, and the fuel flow rate have been preselected to obtain the desired amount of gasification and to sustain continuous gasification with no significant soot formation.
Abstract:
Reducing gas of low CH.sub.4 content is produced by cracking a heavy hydrocarbon having a C/H atomic ratio of more than one at 800.degree.-950.degree. C. in the presence of a catalyst comprising at least one metal selected from K, Ni, Co and Mo or at least oxide of said metal, associated with alumina or a silica-alumina composite.
Abstract:
An apparatus and process for producing a combustible oil gas as a supplement to heating gas from a gas generator comprising a bed of curved elongated refractory bodies composed of silicon carbide material having a high thermal conductivity superimposed upon a layer of refractory grid tile capable of withstanding over 3,000* F., the bed being of a thickness of 0.05-0.5 times the diameter of the shell of the gas generator containing the refractory bed, each body having a curved surface with a diameter between 0.5 to 0.08 times the bed thickness and a length approximately 0.2 to 1.0 times the bed thickness, the bed being directly exposed to form the bottom of a combustion chamber within the gas machine so as to absorb thermal shock and to preserve the conventional refractory brick tile from fusing and spalling and restricting the flow of gas through the refractory bed as well as to maintain a rapid heating oil ignition to avoid explosions within the refractory bed.
Abstract:
A PROCESS FOR THE CONVERSION OF HYDROCARBONS WITH STEAM TO PRODUCE GASEOUS PRODUCT CONTAINING HYDROGEN AND METHANE, OR TOWN''S GAS, WHICH COMPRISES CONTACTING THE HYDROCARBON AND STEAM WITH A PARTICULAR CATALYST AT A TEMPERATURE BETWEEN ABOUT 600*F. AND ABOUT 1000* F. SUCH THAT THERE IS SUBSTANTIALLY NO DELETERIOUS CARBON
DEPOSITION ON THE CATALYST. THE CATALYST EMPLOYED CONTAINS ELEMENTAL NICKEL OR A COMPOUND OF NICKEL, AN OXIDIC REFRACTORY MATERIAL, AND AT LEAST 0.5 WEIGHT PERCENT OF AN ALKALI METAL COMPOUND, EXPRESSED AS ALKALI METAL.
Abstract:
A process of manufacturing a methane-containing gas, which comprises introducing a hydrocarbon feed material containing hydrocarbons having at least 2 carbon atoms per molecule and steam preheated to a temperature in the range of 250.degree.-600.degree. C into a steam reforming reactor (or reactors) packed with a nickel-containing catalyst comprising nickel and magnesia and further containing a copper-chromium mixture in the form of oxide or a copper-chromium-manganese mixture in the form of oxide and effecting steam reforming reaction of said hydrocarbons while maintaining the temperature of the catalyst bed of said reactor(s) in the range of 300.degree. to 600.degree. C.
Abstract:
The compound Ni.sub.5 MgAl.sub.2 (OH).sub.16.sup.. CO.sub.3.sup.. 4H.sub.2 O is precipitated from an aqueous solution containing salts of nickel, magnesium and aluminum with a carbonate or bicarbonate of an alkali metal. After this catalyst precursor has been dried, calcined and reduced with hydrogen a catalyst can be prepared which is suitable for the cracking of hydrocarbons in the presence of steam. In the steam cracking of hydrocarbons the hydrocarbon and the steam may be reacted to form a gas rich in methane in contact with this catalyst at a preheating temperature of less than 300.degree. C.
Abstract:
Methane is produced by reacting a feed gas containing carbon oxides and hydrogen catalytically at an outlet temperature in the range 250-450.degree.C in heat exchange with boiling water generating steam at high pressure or in co-current heat exchange with coal feed gas, whereby heat is continuously removed from the process. By operating such a process in conjunction with a process of reacting hydrocarbons of higher molecular weight than methane with steam a natural gas substitute can be produced very economically.
Abstract:
A unitary, multiple-stage reaction system for countercurrently contacting a fluid reactant stream with catalyst particles movable through the system via gravity-flow. The reaction zones, or stages, are vertically stacked in a single chamber wherein catalyst particles flow from one annular-form bed to the next lower annular-form bed. A first portion of the hydrocarbonaceous charge stock flows downwardly into the lowermost reaction zone, laterally (outward to inward flow) through the annular-form catalyst bed into a center reactant conduit, is admixed with the second portion of the charge stock, flows upwardly through the reactant conduit into the next upper zone and laterally (inward to outward flow) through the annular-form catalyst bed. A preferred embodiment involves three reaction zones within the reaction chamber, with heat-exchange provisions between the middle and upper zones.
Abstract:
A physically durable catalyst composition having high and longlived catalytic activity comprising calcium aluminate and nickel promoted with a barium salt of an organic acid is provided. The catalyst is preferably prepared by impregnating the calcium aluminate support with a nickel salt, reducing the nickel saltimpregnated calcium aluminate and then adding the barium salt, followed by drying prior to use. The catalyst has utility in the steam reforming of hydrocarbons to produce gaseous products rich in methane, fungible with natural gas.