摘要:
Iron/carbon (Fe/C) nanocomposite catalysts are prepared for Fischer-Tropsch synthesis reaction. A preparation method includes steps of mixing iron hydrate salts and a mesoporous carbon support to form a mixture, infiltrating the iron hydrate salts into the carbon support through melt infiltration of the mixture near a melting point of the iron hydrate salts, forming iron-carbide particles infiltrated into the carbon support through calcination of the iron hydrate salts infiltrated into the carbon support under a first atmosphere, and vacuum-drying the iron-carbide particles after passivation using ethanol. Using such catalysts, liquid hydrocarbons are produced.
摘要:
Iron/carbon (Fe/C) nanocomposite catalysts are prepared for Fischer-Tropsch synthesis reaction. A preparation method includes steps of mixing iron hydrate salts and a mesoporous carbon support to form a mixture, infiltrating the iron hydrate salts into the carbon support through melt infiltration of the mixture near a melting point of the iron hydrate salts, forming iron-carbide particles infiltrated into the carbon support through calcination of the iron hydrate salts infiltrated into the carbon support under a first atmosphere, and vacuum-drying the iron-carbide particles after passivation using ethanol. Using such catalysts, liquid hydrocarbons are produced.
摘要:
The invention relates to the integration of a dehydroaromatization process with the processes for the utilization of associated gas; gases comprising methane and higher hydrocarbons, and/or liquefied natural gas (LNG) production or usage.
摘要:
The invention relates to the integration of a dehydroaromatization process with the processes for the utilization of associated gas; gases comprising methane and higher hydrocarbons, and/or liquefied natural gas (LNG) production or usage.
摘要:
Process for preparing a compound having a nonaromatic CnullC double or triple bond (compound A) from another compound or a mixture of other compounds having a nonaromatic CnullC double or triple bond (compound B), which comprises bringing the compound (B) into contact with a heterogeneous catalyst comprising carbides or oxycarbides of a transition element at from 50 to 500null C.
摘要:
An eta phase composition in powder form, prepared in the absence of sulfur or sulfur bearing compounds, having a surface area greater than about 2m.sup.2 /g and consisting of X.sub.6 Y.sub.6 Z.sub.a wherein X is at least one element selected from the group consiting of Mo and W, Y is at least one element selected from the group consisting of Fe, Co. Ni, Mo and W, Z is at least one element selected from the group consisting of C, N and combinations thereof such that when Z is N, a is greater than or equal to 1 but less than or equal to 2 and when Z is C, a is greater than 1 but less than or equal to 2 except when Z is C and Y is Fe, then a is greater than or equal to 1 but less than or equal to 2. The eta phase may be a carbide, nitride or carbonitride. A method for producing the eta-phase composition includes providing a precursor compound including at least two eta-phase forming metals, and a ligand containing carbon, nitrogen or combinations thereof. The precursor compound is thermally decomposed in a nonoxidizing atmosphere, free of sulfur or sulfur bearing compounds, and reacts with carbon or nitrogen derived from the decomposition of the ligand with the metals to form the eta-phase. The eta phase forming metals are at lest two of the metals tungsten, molybdenum, nickel, cobalt and iron. These eta-phase composition may be used for producing or converting hydrocarbons or alcohols. This includes hydrogenation of CO (to produce at least one hydrocarbon or at least one alcohol and hydrogenation of unsaturated hydrocarbons, aromatic hydrocarbons and olefinic hydrocarbons), isomerization and dehydrogenation.
摘要:
Disclosed is a continuous catalytic process for the production of higher molecular weight hydrocarbons from methane in which a methane-containing gas is contacted in a reaction zone with a higher molecular weight hydrocarbon synthesis catalyst under C.sub.2 +hydrocarbon synthesis conditions, the improvement comprising adding a C.sub.2 to C.sub.4 hydrocarbon and hydrogen to said gas thereby forming a reaction gas wherein said C.sub.2 to C.sub.4 hydrocarbon comprises 0.1 to 10 volume percent of said reaction gas and said hydrogen comprises 1 to 25 volume percent of said reaction gas, said synthesis conditions including a temperature greater than 1000.degree. C. and a gas hourly space velocity of greater than 3200 hr.sup.31 1.
摘要:
This invention relates to a finely divided iron carbide-first row transition metal-based catalyst which is produced by a gas phase pyrolytic decomposition reaction driven by a laser. The catalysts may be used to produce various hydrocarbons, including olefins, from CO.sub.2 and H.sub.2.
摘要:
A hydrocarbon conversion process and catalyst, the latter comprising a transition metal, or other hydrogenationdehydrogenation component of said metal, composited with a nonstoichiometric titanium carbide support, particularly a support wherein the titanium carbide is an interstitial solid solution that possesses a stable phase over the stoichiometric range TiC0.52 to TiC0.99, and preferably within a range of TiC0.70 to TiC0.95. Such catalysts are useful for such hydrocarbon conversion processes as hydrogenationdehydrogenation, hydrofining, hydrodesulfurization and reforming. By varying the stoichiometry of the titanium carbide support within the limits described, an interaction is created between the hydrogenation-dehydrogenation component and the support, and the activity and selectivity of the reactions can be controlled and optimized.