CN1017617B

CN1017617B - Method for transformation of synthetic gas with improved cobalt catalyst

Info

Publication number: CN1017617B
Application number: CN88108308A
Authority: CN
Inventors: 查理斯·哈里森·莫尔丁
Original assignee: Exxon Research and Engineering Co
Current assignee: ExxonMobil Technology and Engineering Co
Priority date: 1985-09-12
Filing date: 1988-12-05
Publication date: 1992-07-29
Also published as: CN85107148A; CN1012944B; CN1043307A

Abstract

The present invention relates to a cobalt catalyst which uses rhenium for cocatalysis, particularly to a method for cobalt catalysts to convert synthesis gas into hydrocarbons through the cocatalysis of rhenium and thorium oxide. The method comprises: synthesis gas contacts the catalyst in order to produce the mixture of C10 straight-chain paraffin hydrocarbons and alkene under a reaction condition. The hydrocarbons can be further refined into high-quality distillation fuel and other useful products.

Description

Method for transformation of synthetic gas with improved cobalt catalyst

The invention relates to improved cobalt catalyst, and use this class Catalyst Production hydro carbons with taking in the holder synthetic (Fischen-Tropsch synthesis), especially produce C in methanol conversion ₁₀+ distillate the method for fuel and other useful products of branch.

Methane as with the mixture of other gas in unwanted by product, perhaps the exhaust gas constituents as process unit or unit group usually can obtain from process-stream in a large number.Yet more prior is that gentle Tanaka produces methane in a large number in the oil field as the main component in the Sweet natural gas.The phenomenon that has the storage of methane and Sweet natural gas in a large number, and for producing senior transportation means fuel, especially to producing the needs of midbarrel fuel, the two gives huge hormesis to the processing method (Gas-to-liguids process) of researching and developing new gas commentaries on classics liquid jointly.But, the not photosynthetic this purpose that is suitable for of traditional processing method.The processing method that existing conversion of natural gas is used only produce methyl alcohol, and the sales force of methyl alcohol is restricted at present.Yet, in order to utilize existing process method, just need a kind of method that is suitable for methanol conversion is become high quality transportation means fuel, particularly midbarrel fuel, on the other hand, become the processing method of synthetic gas now ripe Sweet natural gas or methane conversion.And can expense one holder synthesis method (Fischer-Tropsch Synthesis) make synthetic gas be converted into hydro carbons.

Produce the expense one holder synthesis method that hydro carbons is used by carbon monoxide and hydrogen; Known now in technical literature and patent documentation.First industrial expense one holder synthesis technique has used cobalt catalyst, but afterwards again the someone recommend active higher iron catalyst.An impressive progress in taking a fischer-tropsch catalyst field, be the '30s use in early days with the nickel one Thorotrast catalyzer of diatomite as carrier.Within 1 year after this catalyzer comes out, corresponding cobalt catalyst has been proposed, again promptly by weight by 100 parts of Co, 18 parts of ThO ₂Catalyzer with 100 parts of diatomite are formed within after this several years, has proposed again in succession by 100 parts of Co, 18 parts of ThO ₂With the catalyzer of 200 parts of diatomite compositions with by 100 parts of Co, 8 parts of ThO ₂, 8 parts of MgO and 200 parts of catalyzer that diatomite is formed.Base metal iron, cobalt and nickel in the VIII family are used widely in expense one holder reaction so far, and these metals are by catalysis that various other metal helps, and prop up in every way and be held on the various matrixes.The experience that the overwhelming majority is industrial accumulates when using cobalt catalyst and iron catalyst.But cobalt catalyst is in general active low, must use multistage processes, and the through-put of synthetic gas is also low.On the other hand, iron catalyst not exclusively is applicable to conversion of natural gas.This is because the height water-gas shift activity that iron catalyst had causes.Therefore, more synthetic gas is according to reaction: H ₂+ 2CO → (CH ₂) _X+ 2CO ₂Change into carbonic acid gas; And according to the reaction of more wishing (by reaction formula: 2H ₂+ CO → (CH ₂) _X+ H ₂O representative) synthetic gas that changes into hydro carbons and water then very little.

In the art, need a kind of being suitable for methyl alcohol and synthetic gas, under the condition of high conversion and high yield, be converted into senior transportation means fuel, particularly change into C ₁₀+ distillate fuel does not especially produce the processing method of excess carbon dioxide.

The present invention generally includes:

(A) a kind of cobalt by the catalytic activity amount, the perhaps pellet type catalyst composition that constitutes by cobalt and Thorotrast, add enough rheniums therein, so that under corresponding process condition, with the methanol production hydro carbons time or when producing hydro carbons via carbon monoxide-hydrogen building-up reactions, compare with other the similar catalyst composition that does not contain rhenium, obtain higher activity and stable.An amount of rhenium is added in the cobalt catalyst.Perhaps in cobalt and the Thorotrast catalyzer, its add-on is enough to make the rhenium weight of cobalt ratio that catalyzer had of generation.Be higher than about 0.010: 1, be preferably from about 0.025: 1 to about 0.10: 1.According to the total weight of catalyst composition (butt material), with the rhenium of absolute concentration from about 0.05% to about 30%, preferably from about 0.15% to about 1% rhenium is dispersed in the catalytic activity amount cobalt that is on the carrier.Said carrier is an inorganic oxide carrier, preferentially selects titanium oxide (TiO for use ₂) or contain the carrier of titanium oxide, especially wherein the weight ratio of rutile and anatase octahedrite is not less than about 2: 3 titanium oxide.According to American Standard of Testing Materials (ASTM) D3720-78: " adopting X-ray diffraction method to measure the standard method of anatase octahedrite and the ratio of rutile in the TiO 2 pigment " measures this ratio.According to catalyst composition (butt material) total weight, it is from about 2% to about 25% that the cobalt amount that exists in this composition is converted into absolute concentration, be preferably from about 5% to about 15%, and add the q.s rhenium so as to make rhenium weight of cobalt in the catalyzer of formation than according to the total weight of cobalt contained in this catalyst composition (butt material) and rhenium the time greater than about 0.010: 1, preferably be approximately 0.025: 1 to about 0.10: 1.Certainly such just as previously indicated, for required rhenium cobalt ratio is provided, the absolute concentration of every kind of metal is previously selected.Also Thorotrast can be joined in this composition, be preferably in and be about to be used in the methanol conversion it is added this catalyzer.According to catalyst composition (butt material) total weight, Thorotrast that will from about 0.1% to about 10%, Thorotrast that preferably will from about 0.5% to about 5% is dispersed on the carrier.Thorotrast helps in the catalytic cobalt catalyst, contains The addition of C o and ThO ₂, according to contained Co and ThO in this catalyzer ₂Total weight, Co: ThO ₂This ratio about 20: 1 to about 1: 1.Preferably from about 15: 1 to about 2: 1.It is found that the product that these catalyst compositions are produced mainly is C ₁₀+ straight chain paraffins and alkene, and oxidation hardly.These catalyzer have highly selective, high reactivity and active hold facility in methanol conversion or when carbon monoxide and hydrogen are converted into distillate fuel.Especially carrying out the high temperature air regeneration period for further prolonging catalyst life, these catalyzer also are high stability.

(B) a kind of processing method is wherein made a bed with the pellet type catalyst composition in above-mentioned (A), and this catalyst bed is contacted with methanol feeding.Perhaps contact with the raw material of forming by the mixture of carbon monoxide and hydrogen, perhaps contact with the compound that can decomposition in situ in this produces carbon monoxide and hydrogen, so that produce mainly product, the especially C of the midbarrel fuel quality that constitutes by straight chain paraffins and alkene ₁₀+ straight chain paraffins and the fuel product that constitutes of alkene.

(ⅰ) carrying out methanol conversion when reaction, the dividing potential drop of methyl alcohol in reaction mixture remains on generally speaking and is higher than about 100 poundage (absolute pressure power) is (Psia) per square inch.Preferably be higher than about 200Psia.Preferably add hydrogen with methyl alcohol.The usage quantity of methyl alcohol and hydrogen is wanted suitably, CH ₃OH: H ₂This mol ratio is higher than about 4: 1.Preferably be higher than 8: 1.So that the C in the increase product ₁₀+ hydro carbons concentration.When adopting hydrogen, CH ₃OH ₆H ₂Suitable mol ratio be in from about 4: 1 to about 60: 1 in the scope, preferred mol ratio is in from about 8: 1 to about 30: 1 between methyl alcohol and the hydrogen.The hydrogen partial pressure that enters is preferentially selected for use and is lower than about 80Psia, more preferably selects for use to be lower than about 40Psia; The preferable range of the hydrogen partial pressure that enters is from the extremely about 80Psia of about 5Psia.More preferably select for use from about 10Psia to about 40Psia.Usually it is about 0.1 hour at liquid hourly space velocity ^-1To about 10 hours ^-1, preferably from about 0.2 hour ^-1To 2 hours ^-1In the scope.Temperature is at about 150 ℃ to about 350 ℃, preferably carries out this reaction under the condition from about 180 ℃ to about 250 ℃ of scopes etc.The preferable range of methyl alcohol dividing potential drop is in about 100Psia to about 1000Psia.Preferred scope is to about 700Psia from about 200Psia.

(ⅱ) the building-up reactions condition of carrying out normally: H ₂: the CO mol ratio is greater than about 0.5.Preferred H ₂: the CO mol ratio is in from about 0.1 to about 10.More preferably select from about 0.5 to about 4 for use; Gas hourly space velocity be in from about 100V/Hr/V(volume/hour/volume) to about 5000V/Hr/V.Preferred value is from the extremely about 1500V/Hr/V of about 300V/Hr/V; Temperature range is from about 160 ℃ to about 290 ℃, and preferred value is from about 190 ℃ to about 260 ℃; Pressure is higher than about 80 pounds/square inch (gauge pressures) (Psig).Preferred value is in from about 80Psig to about 600Psig.Preferred value is from the extremely about 400Psig of about 140Psig.Under the form that override is selected for use, catalyst bed is by forming from about 5% to about 15% cobalt.Wherein contain the q.s rhenium, make rhenium cobalt ratio contained in the catalyzer be in from about 0.025: 1 to about 0.10: 1 in the scope.And make it to be dispersed in titanium oxide, preferentially be dispersed on high-purity titanium oxide.This catalyst bed is contacted with the gaseous mixture of carbon monoxide and hydrogen, perhaps contact with the compound that can in this, decompose generation carbon monoxide and hydrogen.

In the methanol conversion reaction product or in the building-up reactions product.Usually and preferentially contain 60%.More preferably contain 75% or higher, boiling point be higher than the C of 160 ℃ (320) ₁₀+ liquefied hydrocarbon.

It is found that, be carried on the cobalt and the rhenium on the titanium dioxide carrier of containing of titanium oxide or other, perhaps cobalt, Thorotrast and rhenium provide a kind of catalyst system, and this system demonstrates good methanol conversion characteristic or demonstrate good hydrocarbon composite character in expense one holder reaction.The carrier that contains titanium oxide that in the present invention practice, uses, preferentially select for use surface-area from about 1 to about 120m ²The oxide compound of/gram is more preferably selected for use from about 10 to about 60m ²The oxide compound of/gram.

Rhenium-cobalt/titanium oxide catalyst and rhenium-Thorotrast-cobalt/titanium oxide catalyst.When methanol conversion is hydrocarbon liquid, perhaps with carbon monoxide and hydrogen synthetic hydrocarbon liquid the time, demonstrate very high selectivity.The various catalyzer that in the present invention's practice, use.The known technology preparation that can use when preparing other catalyzer in the art.For example, can or be total to gelling process with gelling process and prepare catalyzer.But, can adopt pickling process.With these metal deposition on the solid support material of making ball shape, sheet shape, particle shape in advance, push or sieving.In preparation during catalyzer, according to the amount of preliminary election these metals are deposited on the carrier from solution, so that the absolute magnitude and the weight ratio of corresponding metal or cobalt, rhenium and Thorotrast are meeted the requirements.By making carrier and containing the compound or the salt of cobalt, the perhaps compound of rhenium-containing or salt, for example solution such as nitrate, carbonate contact combines cobalt and rhenium and carrier.If the adding Thorotrast, then can be in a similar way make Thorotrast and carrier compound with the form of thorium compound or salt, perhaps can at first on carrier, flood thorium, flood cobalt or rhenium then, perhaps flood cobalt and rhenium.On carrier, can at random flood thorium and cobalt, perhaps Thorotrast, cobalt and rhenium jointly.The cobalt, rhenium and the thorium compound that when dipping, use, can be any organometallic compound or the mineral compound that decomposes the oxide compound that generates cobalt, rhenium and thorium when calcining, for example the nitrate of cobalt, rhenium or thorium, acetate, acetylacetonate, ring burn hydrochlorate, carbonyl compound or the like.The amount of used dipping solution should be enough to complete submergence carrier, and according to one or more metal concentrations in the dipping solution, the dipping liquid measure is in 1 to 20 times of scope of carrier bulk usually when by volume calculating.Can under the wide range conditions such as temperature that comprise room temperature and raising, carry out dip treating.Also can add the metal ingredient (the perhaps metal ingredient except that rhenium, cobalt and thorium) except that rhenium and cobalt.Can adopt any method, in any time of preparation catalyzer, for example before making carrier impregnation cobalt and rhenium composition, afterwards or simultaneously, in catalyzer, introduce one or several other metals.Under general operational circumstances, other composition is and cobalt and rhenium perhaps to introduce with cobalt, rhenium and thorium composition.

Titanium oxide uses as carrier, perhaps makes carrier with other material.Methanol conversion or when synthetic gas transforms as the titanium oxide of carrier, preferentially select for use through X-ray diffraction analysis (ASTMD3720-78) and prove that the rutile and the ratio of anatase octahedrite equal about 2: 3 the sort of titanium oxide at least.Transform the titanium oxide of using support of the catalyst as synthetic gas, preferably use the ratio of wherein contained rutile and anatase octahedrite to equal 3: 2 at least, the ratio that is suitable for the contained rutile of titanium oxide that synthetic gas transforms usefulness and anatase octahedrite was preferentially selected for use from about 4: 1 to about 100: 1 or higher from about 3: 2 to about 100: 1.The catalyzer of selecting for use and preferentially selecting for use in the methanol conversion reaction, wherein the rutile of contained titanium oxide is in from about 2: 3 to about 3: 2 in the scope with the ratio of anatase octahedrite.The surface-area of this type titanium oxide is less than about 50 meters ²/ gram.The rutile of this weight has best activity and C usually ₁₀The selectivity of+hydrocarbon and do not produce a large amount of gases and CO ₂

After the dipping, be higher than under about 30 ℃ of temperature, preferential under the temperature between 30 ℃ and 125 ℃, in the presence of ammonia or oxygen, ammonia and oxygen or air, in air-flow or under vacuum, come dry catalyst by heating.Before using, must make cobalt-titanium oxide catalyst, perhaps make Thorotrast help catalytic cobalt-titanium oxide catalyst activation.Being preferably in is enough to change into CO for cobalt oxidation ₃O ₄Temperature under, this catalyzer is contacted with oxygen, air or other oxygenous gas.Temperature is higher than about 150 ℃, preferably is higher than about 200 ℃, is enough to for cobalt changes into oxide compound, and still admissible generally speaking temperature is up to about 500 ℃, and this temperature for example may be used when producing the catalyzer of serious inactivation again.The suitable oxidizing temperature of cobalt is between about 150 ℃ to about 300 ℃.Then, make cobalt contained in the catalyzer, perhaps cobalt and rhenium reduction.Be higher than under about 250 ℃ of temperature, preferably be higher than under about 300 ℃, contacting with reducing gas by making catalyzer (no matter whether passing through prior oxidation), preferably the method that contacts with hydrogen stream or hydrogenous air-flow is reduced.The optimal temperature of this catalyzer of reducing is in from about 250 ℃ to about 500 ℃, and preferably from about 300 ℃ to about 450 ℃, reduction was from about 0.5 to 24 hour under from normal atmosphere to about 40 atmospheric pressure conditions.Using hydrogen or contain hydrogen and the gaseous mixture of inert fraction reduces, is gratifying.

If must from catalyzer, remove coke, this catalyzer is contacted with rare oxygen-containing gas, be lower than under the controlled temperature of this sintering of catalyst burn off coke from this catalyzer.The incendiary temperature is controlled with the method for control oxygen concentration and gasinlet temperature, considers amount of coke and the required time of perfect combustion desiring to remove simultaneously.In the ordinary course of things, at least equal the gas of about 0.1 pound/square inch (Psi) with oxygen partial pressure, the most handy oxygen partial pressure is the gas of about 0.3Psi to about 2.0Psi, handle this catalyzer (being preferably under the dynamic condition) under static state or the dynamic condition, so that make temperature reach about 300 ℃ to about 550 ℃, the treatment time is enough to remove deposits of coke.The method that can finish the coke burn off is, at first only feeds the oxygen that is enough to make the burning beginning, makes temperature remain on the downside of this temperature range simultaneously, sprays into more oxygen then, and along with the rising of crest of flame, temperature increases gradually, till temperature reaches optimum value.In this way, can remove most coke easily.As handling raw catalyst,, make catalyzer reactivate, reduce then, prepare then to use with hydrogen or hydrogenous gas processing.

By with reference to following experiment and embodiment, can understand the present invention more fully, these experiments and the embodiment more comparative data of notable feature of the present invention that furnishes an explanation.Unless otherwise indicated, otherwise all umber all refers to parts by weight.Feed composition is represented with the mol ratio of composition.

" Shu Erci-Fo Luoliaerfa " (" Schulz-Flory Al-pha ") is described in a kind of currently known methods that product distributes in the expense one holder building-up reactions.Shu Erci-Fo Luoliaerfa is that rate of chain growth adds the ratio that stops speed with chainpropagation, and it is by l _n(W _n/ n)-n figure described, W wherein _nBe that carbonatoms is the product weight mark of n.In following examples, the A Erfa value is the C by product ₁₀/ C ₂₀Part derives.Therefore the A Erfa value is that catalyzer is selected when representing with synthetic gas production heavy hydrocarbon, and is C in the product ₁₀The sign of the approximate content of+hydro carbons.For example, Shu-Fo Aerfa value equals at 0.80 o'clock, is equivalent to contain about 35(weight in the product) C of % ₁₀+ hydro carbons, this is acceptable C ₁₀+ hydrocarbon content level.Shu-Fo Aerfa value is 0.85 o'clock, and promptly preferred A Erfa value is equivalent to contain in the product about 54(weight) %C ₁₀+ hydro carbons, and Shu-Fo Aerfa value is 0.90 o'clock, promptly preferred A Erfa value is equivalent to contain in the product about 74(weight) %C ₁₀+ hydro carbons.

Following data show, at Co-TiO ₂Add a small amount of rhenium in the catalyzer.Keep cobalt to be in the high dispersing state, and make catalyzer stable during the air handling at high temperature.Therefore, rhenium keeps the very high reactivity of catalyzer, it is characterized in that making cobalt good dispersion in TiO.CO-Re-TiO ₂High activity can be converted into C at synthetic gas so at low temperatures with high conversion work ₁₀During+hydro carbons, can obtain good selectivity.

Embodiment 1

With titanium oxide (Degussa P-25 TiO ₂) with Sterotex(as a kind of vegetable stearin of lubricant, Ohio, Columbus.The product of city, capital Products Co., Ltd) mix after, through after make ball, grinding and screen to 60-150 order or 16-20 order (Taylor).Use the carrier of this material as whole catalyzer.By making part TiO ₂In 500 ℃ and 600 ℃ of following air, calcine respectively and spend the night.Preparation TiO ₂Two kinds of variants.The TiO that this method makes ₂Carrier has following performance (seeing Table A).

Granularity is that 16-20 purpose catalyzer is by these material preparations of part of selecting, its method is: with the acetone soln that contains colbaltous nitrate or perrhenic acid, perhaps simply flood this carrier with the acetone soln that contains colbaltous nitrate and perrhenic acid, use rotary evaporator 150 ℃ of dryings in vacuum drying oven, in silica tube under the airflow with this catalyst calcination 3 hours.Catalyzer with secondary series in the table I indicates adds in the reactor, at H ₂In in 450 ℃ of reduction 1 hour, be 1000 and H at 200 ℃, 280Psig, gas hourly space velocity then ₂: make it under the conditions such as CO=2.15 and synthesis gas reaction at least 16 hours.With traditional gas chromatography.Use neon to make interior mark (in reinforced, containing 4%) and monitor each catalyst performance.These screening of catalysts result and dynamic O ₂The chemisorption data are listed in the table I.Also with reference to Fig. 1, Fig. 1 describes to use CO transformation efficiency (%) to TiO by cutting off the data that these catalyzer of big portion are obtained with image simultaneously ₂Rutile content (%) contained in the carrier is mapped.Rutile is all represented with rutile content % in table I and Fig. 1 with the ratio of anatase octahedrite, so that drawing.(seeing Table I)

With reference to the intermediary curve that draws on Fig. 1, the data that obtain in this curve representative test 1 and 2, it is not helped catalytic 12%Co catalyzer (used TiO in the representative table I yet ₂The rutile of carrier is 1.1 with the ratio of anatase octahedrite: 1(contains 53% rutile)) and another do not helped the data of catalytic 12%Co catalyzer (ratio of the rutile of its carrier and anatase octahedrite for greater than 30: 1).Such just as proposed.Ratio with rutile and anatase octahedrite among Fig. 1 is expressed as percentage ratio.Draw so that express or be convenient to.These two kinds of catalyzer of on curve, all representing with small circle.Be 250 ℃ of following incinerating in air.Use the TiO of high-rutile content ₂The catalyzer of carrier obviously is good catalyzer.The Co transformation efficiency is 79% to use the TiO than low rutile content ₂The Co transformation efficiency that catalyzer obtained of carrier is 67%.Referring now to the curve of bottom among Fig. 1, the represented figure of this curve representative is by test 3 and 4 data that obtain, promptly with not catalytic by helping, respectively with test 1 and 2 in the similarly test done of catalyzer.Dissimilarity is that two kinds of catalyzer are 500 ℃ of following incinerating in air in test 3 and 4.On curve, also use small circle to represent this two kinds of catalyzer.Two kinds of not stabilized cobalt catalyst (as by to test catalyst system therefor in 3 and 4 active with test 1 and 2 in the active contrast of catalyst system therefor back seen like that) all show active reduction.This be since in air 500 ℃ down during calcining cobalt sintering or forfeiture cobalt dispersiveness cause.With high-rutile content TiO ₂Carrier is made cobalt catalyst.Obviously be good catalyzer.Because cobalt dispersive on high-rutile content carrier is better.

Now once more referring to Fig. 1.Be figure (representing) for test 5,6 and 8 with stain.Obtained the top curve data in graph form.12%Co-3%Re-TiO is used in test 5,6 and 8 respectively ₂(56% rutile), 12%Co-0.5%Re-TiO ₂(100% rutile) and 12%Co-0.5%Re-TiO ₂(56% rutile).These three kinds of catalyzer all are 500 ℃ of following incinerating in air.These data clearly illustrate that.Rhenium is suitable for making the cobalt stabilization, can prevent sintering of catalyst, can prevent that again the cobalt forfeiture is dispersed.0.5% rhenium is enough to make 12% cobalt catalyst stabilization, prevents cobalt forfeiture dispersed (test 6 and 8), it is found that rhenium helps catalytic cobalt catalyst (test 5,6 or 8) and the TiO that cobalt is dispersed in 100% ₂Do not helped catalytic cobalt catalyst to compare on the rutile matrix, at least quite or better.

At least the catalyzer (indicated as data) that contains 0.5%Re, how its rutile content all has high reactivity after the calcining down at 500 ℃.Add more volume rhenium, can not obtain significant benefit usually.But 0.1(weight) the %Re 12%Co catalyzer that can not adequately protect.Notice that rhenium helps catalytic Co catalyzer, promptly 12%Co-0.1%Re catalyzer (test 7) contacts the rear section sintering down in 500 ℃ with air.

These activity datas also can be expressed as pseudo-first-order velocity constant K, and K is expressed from the next:

In the formula, X=CO transforms mark, gas hourly space velocity under envrionment temperature (T) and pressure (D) of P=reactor pressure (normal atmosphere), CHSV=(hour ^-1).K is to traditional dynamic O ₂The UmolO that chemiadsorption records ₂Graph of a relation between the/gram catalyzer is with reference to Fig. 2.Note, for the Co-Re catalyzer, from total chemisorption value, deduction Re-O ₂After the chemisorption share, obtained the chemisorption value of cobalt composition.These data drop on the linear relation, thereby show all dispersed proportional with cobalt of these activity of such catalysts.Rhenium helps catalytic catalyzer to demonstrate the highest activity.Because they have the highest cobalt dispersiveness.This catalyzer is quite stable also.And it is high to have the agglomerating of inhibition ability when calcining down for 500 ℃.

Embodiment 2

By for the 12%Co-0.5%Re-TiO among the embodiment 1 ₂Catalyzer (100% rutile TiO ₂) and a kind of known highly active Re-TiO that has ₂Catalyzer compares.Further prove Co-Re-TiO ₂Catalyzer has astonishing high reactivity.

With 60-150 purpose particulate state 12%Co-0.5%Re-TiO ₂(100% rutile) catalyzer is packed in the reactor.Be to make it under 1000 the condition and H wherein at 200 ℃, 280psig and gas hourly space velocity ₂: CO is no more than for some time of 190 hours than the synthetic gas contact that is approximately 2-2.15.For relatively, use 80-150 purpose particulate state 1%Ru-TiO then ₂(73% rutile, perhaps rutile is 2.7: 1 with the ratio of anatase octahedrite) catalyzer carries out similar test.Do the measurement record at interval by certain hour.And the analysed preparation logistics is so that determine CO transformation efficiency (weight %) and for CH ₄, CO ₂, C ₂+ selectivity (mol%) and Shu-Fo Aerfa value.Referring to the table II.

Indicated as these data, at 200 ℃ of following and 1%Ru-TiO ₂Catalyzer is compared, 12%Co-0.5%Re-TiO ₂Activity of such catalysts is much higher.And by low CH ₄And CO ₂By-product yields and Gao Shu-Fo Aerfa value indicated like that, have high CO transformation efficiency and for the highly selective of heavy hydrocarbon.

The result of the test in continuous 190 hours that provides in the table II is provided.The very hydrocarbon product of heavy is produced in the test of this high conversion, and this product is belonged to by straight chain mainly that hydrocarbon constitutes.Wherein contain some normal olefines and branched-chain component.Its Shu-Fo Aerfa value is 0.92.This show contain about 80(weight in the product) C of % ₁₀+ hydro carbons.

During long run test, change gas hourly space velocity so that obtain data under the different CO transform levels.That illustrate in Fig. 4 and Fig. 5 is Co-Re-TiO ₂Catalyzer and Ru-TiO ₂The comparative result of catalyzer.Just as shown in Figure 4.At 200 ℃ of following 12%Co-0.5%Re-TiO ₂Activity of such catalysts.Compare 1%Ru-TiO ₂Catalyzer is much higher.This is determined by transformation efficiency higher under given space velocity.Fig. 5 is illustrated as reference, and these two kinds of catalyzer are for CH ₄And CO ₂Selectivity all quite low.

Embodiment 3

Rhenium helps catalytic cobalt catalyst, is that the activity of hydro carbons also is very high for making methanol conversion.For the purpose of illustrating, a series of tests have been done with three kinds of cobalt catalyst.These three kinds of cobalt catalyst are (1) 12%Co-2%ThO ₂/ TiO ₂, (2) 12%Co-2%ThO ₂-0.5%Re/TiO ₂(3) 12%Co-0.5%Re/TiO ₂These catalyzer are with 16-20 order TiO ₂The method of (56% rutile) dipping is made.Every kind of catalyzer is added in the reactor, under 500 ℃, carry out air calcination.At the trial, be 500 and CH at 230 ℃, 400psig, gas hourly space velocity ₃Make methyl alcohol pass through every kind of catalyzer under the conditions such as OH/Ar=4 with argon.Test-results is listed in the table III.

These data clearly illustrate that, Co-Re-TiO ₂Catalyzer and Co-ThO ₂-Re-TiO ₂Catalyzer and does not help catalytic Co-ThO-TiO ₂Catalyzer is compared has high-caliber transformation efficiency.Though because the CO that produces ₂Many and make these two kinds of catalyzer to C ₂The selectivity of+hydro carbons reduces to a certain extent.But remain a kind of preferred catalyzer.When using raw material of synthetic gas, do not observe this high water-gas shift activity of using methyl alcohol.

Below data show, transform in order to make synthetic gas, by using catalyzer to transform the method that synthetic gas utilizes the reduction cobalt before as hydro carbons, cobalt catalyst is activated.

Embodiment 4

Under conditions of similarity, with several parts of Co-TiO ₂Catalyzer (12%Co-0.5%Re/TiO ₂(100% rutile)) done a series of tests.Before the test respectively under 200 ℃, 235 ℃, 300 ℃ and 450 ℃ with hydrogen with different piece catalyst pretreatment 3 hours.These tests are undertaken in each test by following condition.In 200 ℃, 280psig, gas hourly space velocity is 1000 and H ₂: under the conditions such as CO=2.15.These catalyzer are contacted with the synthetic gas of being made up of the mixture of hydrogen and carbon monoxide.Test-results is listed among the table IV.

These results show, in order to make the catalyst activation that transforms synthetic gas.High temperature reduction is necessary.Must be higher than under about 250 ℃.Be preferably in and be higher than reduction cobalt under about 300 ℃.Carrying out the reductive suitable condition is: from about 250 ℃ to about 500 ℃ of temperature.Preferably from about 300 ℃ to about 450 ℃ of temperature with hydrogen or with the gas reduction that contains hydrogen.

Table A

Calcining temperature rutile and sharp titanium surface-area pore volume

Weight ratio (l) m in ℃ ore deposit ²/ gram milliliter/gram

500 1.2∶1-1∶1 30-36 0.28-0.40

600 ＞30∶1 10-16 0.11-0.15

The table I

280 ℃, 280Psig, gas hourly space velocity=1000, H ₂: CO=215

Test is at 16-20 order TiO ₂TiO ₂Middle air handling O ₂Chemistry inhale CO and change

Attached μ molo ₂Change rate (%)

Metal on number (weight) % rutile % temperature ℃ (3 hours)/gram catalyzer

1 12Co 53（1） 250 213 67

2 12Co 100（2） 250 265 79

3 12Co 56（3） 500 178 54

4 12Co 100（2） 500 202 67

5 12Co-3Re 56（3） 500 399 81

6 12Co-0.5Re 100（2） 500 285 82

7 12Co-0.1Re 100（2） 500 145 67

8 12Co-0.5Re 56（3） 500 343 85

3Re 56（3） 500 149 ＜1

(1) rutile: anatase octahedrite=1.1: 1.

(2) rutile: anatase octahedrite＞30: 1.

(3) rutile: anatase octahedrite=1.3: 1

The table II

200 ℃, 280psig, gas hourly space velocity=1000, H ₂/ CO=2.0-2.15

12% Co-0.5% Re-TiO ₂1% Ru-TiO ₂

The 60-150 order

Through 500 ℃ of calcining 80-150 orders

Time in logistics

(hours) 15 75 190 4 162

CO transformation efficiency (weight %) 98 86 78 45 22

Selectivity (mol%)

CH ₄4.5 3.5 3.3 2.3 5.2

CO ₂2.3 0.6 0.3 2.3 0.1

O ₂93.2 95.9 96.4 95.4 94.7

Shu Er-Fo Luoli

A Erfa value-0.92 0.92--

The table IV

The 12%Co-0.5%Re-rutile, the 60-150 order was through 500 ℃ of calcinings 3 hours.200 ℃, 280psig, air during gas=1000, H ₂/ CO=2.15

Reduction temperature, ℃ CO transformation efficiency

200 0

235 8

300 98

450 99

The table III

Methanol conversion

230 ℃, 400psig, gas hourly space velocity=500, CH ₃OH/Ar=4

(16-20 order catalyzer is through 500 ℃ of calcinings down)

12%Co- 12%Co-2%ThO ₂12%Co-

2%ThO ₂-0.5%Re 0.5%Re

Methanol conversion 49 100 87

Carbon products distributes, weight %

CO 6 2 2

CO ₂14 28 22

CH ₄6 14 9

C ₂₊74 56 67

Claims

1, a kind of method that makes raw material of synthetic gas be converted into hydro carbons, it is characterized in that under reaction conditions, this raw material being contacted with a kind of catalyzer, this catalyzer contains cobalt and the rhenium with inorganic oxide carrier compound from about 2% to about 25%, and the weight ratio of rhenium and cobalt was greater than about 0.010: 1.

2, according to the method for claim 1, it is characterized in that calculating according to said total catalyst weight, said catalyzer contains the Thorotrast that is dispersed in from about 0.1% to about 10% on the said carrier in addition.

3, according to the method for claim 1 or 2, its feature also is to calculate by said catalyst weight, contains from about 5% to about 15% cobalt in the said catalyzer.

4, according to the method for claim 2, its feature is that also the ratio of cobalt and Thorotrast is in from about 20: 1 to about 1: 1 in the scope in the catalyzer.

5, according to the method for claim 2, its feature is that also the weight ratio of rhenium and cobalt is in from about 0.025: 1 to about 0.1: 1 in the scope in the catalyzer, and cobalt is in from about 15: 1 to about 2: 1 in the scope with the ratio of Thorotrast.

6, according to the method for claim 2, its feature is that also said catalyzer contains from about 0.5% to about 5% Thorotrast.

7, according to the method for claim 1, its feature is that also the inorganic oxide carrier in the catalyzer is titanium oxide or the carrier that contains titanium oxide.

8, according to the method for claim 1, its feature is that also the carrier in the catalyzer is titanium oxide or the carrier that contains titanium oxide, and rutile was at least about 3: 2 with the ratio of anatase octahedrite content in the said titanium oxide.

9, according to the method for claim 1, its feature is that also the carrier in the catalyzer is titanium oxide or the carrier that contains titanium oxide, and the ratio of rutile and anatase octahedrite amount is in from about 3: 2 to about 100: 1 or in the higher scope in the said titanium oxide.

10, according to the method for claim 1, its feature is that also said raw material is the mixture of carbon monoxide and hydrogen, and said reaction conditions is defined in the following scope:

H ₂: CO mole was than about 0.5: 1 to 4: 1

Gas hourly space velocity, V/Hr/V about 100 to 5000

Temperature, ℃ about 160 to 290

Total pressure, psig about 80 to 600