592 results about "Fischer–Tropsch process" patented technology

A catalyst and method for producing hydrocarbons using a catalyst support having an improved hydrothermal stability, such as under Fischer-Tropsch synthesis conditions. The stabilized support is made by a method comprising treating a boehmite material in contact with at least one structural stabilizer. Contacting the boehmite with at least one structural stabilizer can include forming a mixture comprising the boehmite material and at the least one structural stabilizer. The mixture can be a sol or a slurry. The treating preferably includes drying or spray drying the mixture, and calcining in an oxidizing atmosphere to obtain the stabilized support. Preferred structural stabilizers can include an element, such as cobalt, magnesium, zirconium, boron, aluminum, barium, silicon, lanthanum, oxides thereof, or combinations thereof; or can include precipitated oxides, such as a co-precipitated silica-alumina.

A hydrothermally-stable catalyst, method for making the same, and process for producing hydrocarbon, wherein the catalyst is used in synthesis gas conversion to hydrocarbons. In one embodiment, the method comprises depositing a compound of a catalytic metal selected from Groups 8, 9, and 10 of the Periodic Table on a support material comprising boehmite to form a composite material; and calcining the composite material to form the catalyst. In other embodiments, the support material comprises synthetic boehmite, natural boehmite, pseudo-boehmite, or combinations thereof.

The invention discloses a reduction method for an iron-based catalyst for Fischer-Tropsch synthesis in a fixed bed. The method comprises the following steps: adding the iron-based catalyst into a fixed bed reactor; and introducing gaseous hydrocarbon or mixed gas of hydrogen and gaseous hydrocarbon into the fixed bed reactor for reduction reaction to reduce the iron-based catalyst. The reduction method has the advantages that (1) the reduced catalyst has a little carbon deposit, so the catalyst has high activity and stability; (2) the product selectivity of the catalyst can be effectively modulated, and the selectivity for C5-30 in products is high; and (3) the reduced catalyst has a little carburization, so the catalyst has high wear resistance.

A Fe-base catalyst with high antiwear performance, activity and stability for the Fischer-Tropsch synthesis contains Fe, Zn, Cu, K and SiO2. It is prepared through proportionally mixing sodium carbonate solution as precipitant with the mixed solution of iron nitrate, zinc nitrate and copper acetate, depositing to obtain deposit slurry, adding the mixed solution of potassium silicate and silicon sol, spray drying and calcining.

The invention relates to a fischer-tropsch cobalt-based catalyst composed of an active component and a carrier, wherein, the metal cobalt accounts for 5-35 percent, and the carrier accounts for 65-95 percent of the catalyst which is made by a method of impregnation. The fischer-tropsch cobalt-based catalyst has the advantages of improving the reactivity of the catalyst and optimizing the distribution of products as well as increasing the selectivity for C5<+>; besides, the fischer-tropsch cobalt-based catalyst has simple process and is suitable for mass industrial production.

A catalyst for Fischer-Tropsch synthesis consists of Co 10.0-80.0 wt%, zirconia 15.0-85.0 wt% and other metal oxide 0-5.0 wt%, and is prepared by the codeposition process or soaking process. The catalyst has excellent stability, high reduction degree and high metal dispersivity.

The invention pertains to a lean process for the production of hydrocarbons in which a tail gas is subjected to shift conversion, carbon dioxide removal, and then to purification in a PSA to obtain a hydrogen stream comprising more than 99 vol % hydrogen. The Fischer Tropsch process is a single-stage process. The hydrogen stream can be used to upgrade the Fischer-Tropsch hydrocarbons.

The invention provides a compression ignition engine fuel derived from a Fischer-Tropsch process, which fuel has a generally increasing iso:n paraffins ratio with increasing paraffin carbon number at least between C₉ to C₁₈, less than 0.05% m/m sulphur, and less than 10% by mass aromatics. The fuel may have on average more than 0.9 alkyl branches per paraffinic molecule as measured by H⁺ NMR analysis. The invention also provides a method for operating a compression ignition engine to produce low particulates emissions, which method comprises combusting the fuel with oxygen or an oxygen containing gas in the engine. Yet further the invention provides a method of improving the conversion efficiency of oxidation catalysts used in conjunction with compression ignition engines, said method including combusting the fuel in the compression ignition engine in the presence of said oxidation catalysts and in oxygen or an oxygen containing gas.

The invention relates to a precipitated iron catalyst for Fischer-Tropsch synthesis reaction, and a preparation method and application thereof. The preparation method comprises the following steps of: (a) feeding ferric salt solution, aid saline solution, the solution of precipitator and a small amount of solution of silicon compounds in a form of concurrent flow into a precipitation reactor; (b)performing coprecipitation reaction on the mixture under certain process conditions in the reactor, and fast cooling, filtering and rinsing pulp obtained after the precipitation reaction is finished;(c) adding a silicon compound binder into a filter cake obtained after the rinsing, adding a nitric acid into the filter cake to adjust pH and performing secondary filtration; (d) performing secondary pulping on the obtained filter cake with de-ionized water or the mixed solution of the de-ionized water and the required aid saline solution; and (e) performing spray-drying molding and baking on the obtained catalyst pulp. The catalyst prepared by the method of the invention has high specific surface area, proper pore volume, high wear strength, high sphericity and smooth surface.

The invention relates to a method for processing Fischer-Tropsch synthesis tail gas, which comprises the steps of decarburization, membrane separation, low temperature oil washing, tail gas conversion and pressure swing adsorption(PSA). The method is characterized in that tail gas from a Fischer-Tropsch synthesis apparatus is passed through a decarburization unit for removing CO2 component; decarburization tail gas is sent to a membrane separation unit for recovering hydrogen, membrane separation penetration gas with rich hydrogen is boosted and then sent to a PSA unit for hydrogen production, also can be returned to the Fischer-Tropsch synthesis apparatus after boosting, the membrane separation unit can be returned to the Fischer-Tropsch synthesis apparatus according to the required gas with any H2/CO proportion, membrane separation non-penetration gas can be passed through a low temperature oil washing unit for recovering liquefied gas component and then sending to a tail gas conversion unit, and also can be sent to the tail gas conversion unit directly for hydrogen production; in the tail gas conversion unit, oil washing dry gas or membrane separation non-penetration gas are conversed, methane and hydrocarbons components are conversed to crude synthetic gas; the conversed crude synthetic gas converses CO and H2O to CO2 and H2, the conversed gas after decarburization removes CO2 to obtain hydrogen rich gas, the hydrogen rich gas is passed through the PSA unit for recovering hydrogen, hydrogen in the PSA unit can be used for whole plant, the analytic gas can be used as fuel gas.

The invention relates to method and equipment system for separating and recovering organic oxygen-containing compounds in a Fischer-Tropsch synthesis water phase. The equipment system is integrated by adopting twelve towers including a mixed acid cutting tower, an acetaldehyde rectifying tower, a methanol/ethanol dividing tower, a methanol extraction rectifying tower, a methanol rectifying tower, an acetaldehyde removing tower, an ethanol tower, a propanol concentration extracting tower, a propanol intermittent azeotropic distillation tower, a carboxylic acid extraction tower, a carboxylic acid intermittent rectifying tower and an extraction agent recovering tower matched with the carboxylic acid extraction tower for use. By applying the method and equipment system disclosed by the invention, more than ten kinds of organic oxygen-containing compounds such as acetaldehyde, acetone, methanol, ethanol, normal propyl alcohol, normal butanol, acetic acid, metacetonic acid, butyric acid, butanone and the like can be separated from raw materials; and the products can respectively reach the industrial purity. The method and equipment provided by the invention are economic, effective and reasonable; and according to the method and equipment, efficiency of Fischer-Tropsch synthesis industrial enterprises can be greatly increased, production cost is reduced and goal of clean production can be achieved.

The invention relates to a Fischer-Tropsch synthesis catalyst, its preparation and application. The catalyst contains a carrier and an active metal component that is loaded on the carrier and is selected from iron and/or cobalt. The catalyst is characterized in that, the carrier is a surface modified porous heatproof inorganic oxide molded carrier composed of silicon and one or more divalent metal components selected from the IIA group, the VIII group, the IB group and the IIB group. In terms of elements and based on the carrier, the content of silicon is 0.3-3.5 wt%, and the content of the divalent metal components is 0.2-2.0 wt%. Compared with the prior art, the catalyst provided in the invention has high wear resistance, and also has high activity and selectivity at the same time.

The present invention relates to a stable, low sulfur, olefinic distillate fuel blend component derived from a Fischer-Tropsch process and a process for producing this stable, low sulfur, olefinic distillate fuel blend component. The stable, low sulfur, olefinic distillate fuel comprises olefins in an amount of 2 to 80 weight percent, non-olefins in an amount of 20 to 98 weight percent wherein the non-olefins are predominantly paraffins, oxygenates in an amount of less than 1 weight percent, and sulfur in an amount of less than 10 ppm by weight. A distillate fuel comprising the above blend component forms less than 5 ppm peroxides after storage at 60° C. for four weeks.

The invention relates to a process for producing middle distillates from a paraffinic feedstock produced by Fischer-Tropsch synthesis, implementing a hydrocracking/hydroisomerisation catalyst comprising at least one hydro-dehydrogenating metal selected from the group formed by the metals from group VIB and from group VIII of the periodic table and a substrate comprising at least one crystallised IZM-2 solid having a chemical composition, expressed on an anhydrous base, in terms of oxide moles, by the following general formula: XO₂:aY₂O₃:bM_2/nO, wherein X represents at least one tetravalent element, Y represents at least one trivalent element and M is at least one alkali metal and/or an alkaline earth metal of valency n, a and b representing respectively the number of moles of Y₂O₃ and M_2/nO and a is between 0 and 0.5 and b is between 0 and 1.

The invention discloses a method for preparing a long-life cobalt-based catalyst for Fischer-Tropsch synthesis. The method comprises the following steps of: performing surface modification on a silica gel carrier; and loading a metal aid and an active ingredient Co by adopting an immersion method, wherein the surface modification method for the silica gel carrier is to perform immersion treatmentby using acid solution of sugar. Compared with similar catalysts, the catalyst for Fischer-Tropsch synthesis prepared by the method has the advantages of reducing the reaction between the carrier andthe active ingredient in the processes of preparing and using the catalyst, and showing better stability in the reaction process, along with long service life.

This invention relates to a synthesis method of fischer-tropsch. Its preparation includes (a) Synthesis gas material enters into the first fischer-tropsch synthesis reactor to conduct fischer-tropsch synthesis reaction under the action of accelerant, (b) Segregating the first grade reaction product and letting parts of end gas return to the first fischer-tropsch reactor for recycling, and then letting C1-C4 alkanes containing in other surplus end gas to transform into synthetic gas.(c) Mixing the end gas transformed at step (b) and the second fischer-tropsch synthesis reaction circulation gas, and then entering the second fischer-tropsch synthesis reactor to conduct fischer-tropsch synthesis reaction under accelerant. (d) Segregating the second fischer-tropsch synthesis reaction product, and most of the gas returning to the second fischer-tropsch synthesis reactor for circulating reaction, and then evacuating other end gas. The transformation efficiency of CO+H2 is higher than 96% and the yield of methyl hydride is lower than 3%, and the yield of unit space-time of accelerant reaches 185 g/kg*h.

A hydrocarbon synthesis (HCS) process wherein a Fischer-Tropsch reactor is operated to maximize the selectivity to 371.degree. C.+ boiling fraction while minimizing the production of less valuable products such as light gases (C.sub.1 -C.sub.4), naphtha and diesel fractions. Inventive modes of operation to offset the effects of catalyst deactivation and maximize selectivity to 371.degree. C.+ boiling fraction are utilized including (a) reducing gas inlet velocity to maintain an optimal CO conversion level, (b) introducing additional active catalyst until a maximum loading is reached, and (c) increasing reactor temperature until productivity reaches a predetermined cut-off level.

The invention relates to a catalyst for hydrogenation of Fischer-Tropsch synthesis oil, which is characterized in that lanthanide metal lanthanum and/or cerium, and/or non-metallic element phosphorus and/or boron and/or fluorine which are used as cocatalysts are added into active component nickel and tungsten and/or molybdenum, and the catalyst comprises the following components in percentage by weight: 10-18% of nickel oxide, 1-20% of tungsten oxide or molybdenum oxide, 0-15% of silicon oxide and/or titanium oxide; 0-10% of lanthanum oxide and/or cerium oxide; 0-10% of phosphorus pentoxide and/or boron oxide and/or fluorine oxide and 35-89% of aluminum oxide. The preparation method of the catalyst comprises the steps of preparing carriers, soaking active components and adding cocatalyst components. The catalyst of the invention is suitable for the hydrogenation process of oil products having high olefin content and containing a certain amount of oxygen compounds, is especially suitable for hydrogenation of Fischer-Tropsch synthesis oil products, and has the advantages of high hydrogenation activity, good catalyst stability and the like.

The invention discloses hydrodeoxygenation catalyst for Fischer Tropsch synthesis oil. The catalyst consists of one or more of Mo, W and Ni which are used as main catalytic reactive metal components, a carrier and IIIA-group, VA-group, VIII-group or lanthanide-series and other acid catalytic active components, wherein the carrier is an acid modified alumina carrier, a compounded carrier containing a molecular sieve and alumina or a solid acid carrier or a combination of more of the acid modified alumina carrier, the compounded containing the molecular sieve and alumina and the solid acid carrier. The invention also discloses a preparation method for the catalyst and the application of the catalyst to a hydrodeoxygenation process of the Fischer Tropsch synthesis oil; by using the catalyst, organic oxygenated chemicals in the Fischer Tropsch synthesis oil can be effectively subjected to hydro-conversion under the conditions that the reaction temperature is 150 to 350 DEG C, pressure is 2 to 10 MPa, weight hourly space velocity (WHSV) is 0.3 to 5.0h<-1>, and the volume ratio of hydrogen to oil is 300 to 2,000; the removal rate of the organic oxygenated chemicals is more than 96.0 percent, and a product is low in acid value and high in chromaticity; and compared with the conventional catalyst, the catalyst has the advantages of obviously reducing the reaction temperature and reducing energy consumption.

A microspherical Fe-base catalyst for slurry-bed Fischer-Tropsch synthesis contains Fe, Ce, Cu, K and SiO2. Its preparing process includes such steps as preparing the deposit slurry from the mixed solution of iron nitrate, cerium nitrate, copper acetate, and sodium carbonate, adding the mixed solution of K2C2O4 and silica sol, spray drying, and calcining.