CN108435206A - A kind of low temperature exhaust gas hydrotreating catalyst and preparation method thereof - Google Patents
A kind of low temperature exhaust gas hydrotreating catalyst and preparation method thereof Download PDFInfo
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Abstract
The present invention discloses a kind of low temperature exhaust gas hydrotreating catalyst and preparation method thereof, wherein the low temperature exhaust gas hydrotreating catalyst, it is composed of the following components：Porous metal oxide, 15 parts by weight molybdenum oxides, 27 parts by weight cobalt oxides, 0.5 1.2 parts by weight lanthanas, 0.6 0.8 parts by weight ruthenium-oxide, 0.3 0.8 parts by weight bismuth oxides, 0.2 0.6 parts by weight palladium oxides and the 0.2 0.4 parts by weight rheium oxides that 80 90 parts by weight grain sizes are 300 500 μm.Preparation method in the present invention can not only improve distribution consistency degree of the active component on carrier, mixing uniformity between active component can also be improved simultaneously, it is less the time required to so that the rate of recovery of the sulfur dioxide in tail gas is reached requirement using the tail gas hydrogenation processing catalyst in the present invention and under same dose and same operating mode.
Description
Technical field
The present invention relates to technical field of sulfur recovery, it is related specifically to a kind of low temperature exhaust gas hydrotreating catalyst and its system
Preparation Method.
Background technology
Increasingly stringent and people's environmental consciousness with environmental regulation further enhances, to PETROLEUM PROCESSING and petrochemical industry
The requirement of sulfur-containing compound discharge standard is also increasingly stringenter in device.In order to meet the requirement of new environmental protection standard, oil plant and
Gas Purification Factory sulfur recovery facility total sulfur recovery must reach 99.70% or more, and in order to meet above-mentioned total sulfur recovery
Rate, most of sulfur recovery unit have been all made of reduction-absorption process.That is sulfuric acid gas is after two level Claus conversion, into adding
Elemental sulfur, sulfur-containing compound in tail gas is added hydrogen or hydrolysis to be vulcanization by hydrogen reactor under the action of hydrogenation catalyst
Then hydrogen uses the selection of amine liquid to absorb, purified tail gas is discharged into air.
Sulfur recovery tail gas hydrogenation catalyst is mainly with CO, MO, Ni, W etc. for active metal component, in order to improve in tail gas
Sulfur dioxide recovery rate also increases the dosage of catalyst and the ratio table of catalyst in addition to extending the hydrogenation reduction time
The modes such as area.And in existing tail gas hydrogenation processing method for preparing catalyst, carrier is put into active component by generally use
Active component is supported on carrier by the mode in maceration extract, but under the influence of the surface tension, the activearm in maceration extract
It is difficult to be evenly distributed on carrier to divide, this just affects the overall performance of catalyst.And it is handled using existing tail gas hydrogenation
It is exactly to improve instead in addition to extending the reaction time to improve the conversion ratio of sulfur dioxide when catalyst carries out tail gas hydrogenation processing
It answers temperature and increases catalyst amount, improve the energy consumption that reaction temperature increases tail gas hydrogenation, increase the tail gas of enterprise
The cost of hydrogenation reaction.
Invention content
In view of this, the purpose of the present invention is to provide a kind of low temperature exhaust gas hydrotreating catalyst and preparation method thereof,
Preparation method in the present invention can not only improve distribution consistency degree of the active component on carrier, can also improve activity simultaneously
Mixing uniformity between component, and under same dose and same operating mode, handled using the tail gas hydrogenation in the present invention
Catalyst makes the rate of recovery of the sulfur dioxide in tail gas reach less the time required to requirement, and in same operating mode, with taking and
With under dosage, in the case where reaching same Sulphur Dioxide rate, low temperature exhaust gas hydrotreating catalyst of the present invention is utilized
The temperature for the reaction being catalyzed is relatively low.
In order to solve the above technical problems, the technical solution adopted by the present invention is as follows：A kind of low temperature exhaust gas hydrorefining catalyst
Agent, it is composed of the following components：80-90 parts by weight grain sizes be 300-500 μm porous metal oxide, 1-5 parts by weight molybdenum oxide,
2-7 parts by weight cobalt oxide, 0.5-1.2 parts by weight lanthana, 0.6-0.8 parts by weight ruthenium-oxide, 0.3-0.8 parts by weight bismuth oxide,
0.2-0.6 parts by weight palladium oxide and 0.2-0.4 parts by weight rheium oxides, the porous metal oxide be load have titanium dioxide,
The porous activated alumina particle of magnesia and zinc oxide.
Above-mentioned low temperature exhaust gas hydrotreating catalyst, the porous metal oxide is by 10-20 parts by weight of titanium dioxide, 5-
10 parts by weight magnesia, 5-10 part by weight of zinc oxide and the parts by weight of activated aluminium oxide compositions of 30-50.
The grain size of above-mentioned low temperature exhaust gas hydrotreating catalyst, titanium dioxide is 5-10 μm, and the grain size of the magnesia is
1-3 μm, the grain size of the zinc oxide is 1-3 μm, and the grain size of activated alumina is 50-75 μm.
The grain size of above-mentioned low temperature exhaust gas hydrotreating catalyst, the molybdenum oxide is 10-50nm, the grain size of the cobalt oxide
For 20-80nm.
The grain size of above-mentioned low temperature exhaust gas hydrotreating catalyst, the lanthana is 10-20nm, the grain size of the ruthenium-oxide
For 5-10nm, the bismuth oxide grain size is 1-6nm, and the grain size of the palladium oxide is 3-8nm, and the grain size of the rheium oxide is 1-
5nm。
The preparation method of above-mentioned low temperature exhaust gas hydrotreating catalyst, includes the following steps：
(1) prepare raw material：Prepare raw material according to following parts by weight：The porous gold that 80-90 parts by weight grain sizes are 300-500 μm
Belong to oxide, 1-5 parts by weight molybdenum oxide, 2-7 parts by weight cobalt oxide, 0.5-1.2 parts by weight lanthana, 0.6-0.8 parts by weight oxygen
Change ruthenium, 0.3-0.8 parts by weight bismuth oxide, 0.2-0.6 parts by weight palladium oxide and 0.2-0.4 parts by weight rheium oxides, the porous gold
It is the porous activated alumina particle that load has titanium dioxide, magnesia and zinc oxide to belong to oxide；
(2) the load weighted porous metal oxide in step (1) and absolute alcohol are mixed, the porous metals oxygen
Compound is dispersed under sonic oscillation effect in absolute alcohol, and mixed solution is made；
(3) by the load weighted cobalt oxide, the molybdenum oxide, the lanthana, the ruthenium-oxide, institute in step (1)
It states bismuth oxide, the palladium oxide and the rheium oxide to be put into mixed solution made from step (2), sonic oscillation 30-60min,
Catalyst wet mixed feed is made；
(4) by catalyst wet mixed feed vacuum drying 20-30min, drying temperature 80-120 obtained in step (3)
DEG C, catalyst dry blend is made；
(5) catalyst dry blend will be made in step (4) and calcines 20-30min under inert gas protection, calcination temperature is
750-900℃。
The preparation method of above-mentioned low temperature exhaust gas hydrotreating catalyst, the system of porous metal oxide described in step (1)
Preparation Method includes the following steps：
(1.1) prepare raw material：Activated alumina, titanium dioxide, magnesia, zinc oxide, lignocellulosic and grain size are
0.5-5 μm of dry dextrin；
(1.2) dry dextrin is granulated, and the dry dextrin particle that grain size is 15-30 μm is made；
(1.3) by the activated alumina particle got ready in step (1), titanium dioxide and lignocellulosic mixed grinding 20-
Mixture is made in 30min；
(1.4) mixture will be made in dry dextrin particle made from step (1.2) and step (1.3) and obtained do is mixed
Deionized water is added into siccative under conditions of continuing stirring for material, and wet feed is made；Siccative and the mass ratio of deionized water are
20-24:1, the mixing time being added after deionized water is 20-30min,
(1.5) by wet feed obtained freeze-day with constant temperature 30-40min at 100-120 DEG C in step (1.2), then in 900-
15-30min is calcined at 1200 DEG C, then by the solid abrasive after calcining at 300-500 μm of particle；
(1.6) by particles rinsed with water 4-6 times made from step (1.6), the then vacuum drying 30- at 35-50 DEG C
50min is to get the porous metal oxide.
The preparation method of above-mentioned low temperature exhaust gas hydrotreating catalyst is blown with hair-dryer before the milling in step (1.6)
5-10min。
The preparation method of above-mentioned low temperature exhaust gas hydrotreating catalyst, the length 20-30 of lignocellulosic in step (1.1)
μm。
The preparation method of above-mentioned low temperature exhaust gas hydrotreating catalyst, in step (5), calcination temperature is 820-850 DEG C.
Beneficial effects of the present invention are as follows：
1. carrier and absolute alcohol are mixed using sonic oscillation, are conducive to that carrier is discharged by the preparation method in the present invention
The air adsorbed in cavity enters in the cavity of carrier and is supported on to be conducive to active component under the action of sonic oscillation
On hole wall, and then active component can be enable to be uniformly distributed on carrier surface layer, improve the performance uniformity of catalyst.
2. the tail gas hydrogenation in the present invention handles catalyst, magnesia, zinc oxide, lanthana, ruthenium-oxide, oxidation are utilized
Bismuth, palladium oxide and rheium oxide constitute co-catalyst, by magnesia, zinc oxide, lanthana, ruthenium-oxide, bismuth oxide, palladium oxide and
The synergistic effect of rheium oxide improves the catalytic activity of molybdenum oxide and cobalt oxide, thus under same dose and same operating mode,
Using the tail gas hydrogenation processing catalyst in the present invention make the rate of recovery of the sulfur dioxide in tail gas reach the time required to requirement compared with
It is few, and required reaction temperature is relatively low.
3. improving low temperature in the present invention using the synergistic effects of magnesia, zinc oxide and the titanium dioxide in the present invention
Hydrotreating catalyst can make the high conversion rate of organic sulfur up to 99.6% the hydrolysing activity of organic sulfur at 210 DEG C.
Specific implementation mode
In order to illustrate more clearly of the present invention, with reference to preferred embodiment, the present invention is described further.Ability
Field technique personnel should be appreciated that following specifically described content is illustrative and be not restrictive, this should not be limited with this
The protection domain of invention.
Embodiment 1
The present invention provides a kind of low temperature exhaust gas hydrotreating catalyst, composed of the following components：82 parts by weight grain sizes are 420
μm porous metal oxide, 3 parts by weight molybdenum oxides, 6 parts by weight cobalt oxides, 1.2 parts by weight lanthanas, 0.6 parts by weight oxidation
Ruthenium, 0.5 parts by weight bismuth oxide, 0.3 parts by weight palladium oxide and 0.2 parts by weight rheium oxide, wherein the porous metal oxide is
Load has the porous activated alumina particle of titanium dioxide, magnesia and zinc oxide, and the porous metal oxide is by 12 weight
Part titanium dioxide, 9 parts by weight magnesia, 9 part by weight of zinc oxide and 36 parts by weight of activated aluminium oxide compositions, the titanium dioxide
Grain size is 5 μm, and the grain size of the magnesia is 2 μm, and the grain size of the zinc oxide is 1 μm, and the grain size of the activated alumina is
60 μm, the grain size of the molybdenum oxide is 20-30nm, and the grain size of the cobalt oxide is 60-80nm, and the grain size of the lanthana is
The grain size of 10-15nm, the ruthenium-oxide are 5-8nm, and the bismuth oxide grain size is 1-3nm, and the grain size of the palladium oxide is 5-
The grain size of 8nm, the rheium oxide are 3-5nm.
The preparation method of low temperature exhaust gas hydrotreating catalyst in the present embodiment, includes the following steps：
(1) prepare raw material：Prepare raw material according to following parts by weight：The porous metals that 82 parts by weight grain sizes are 420 μm aoxidize
Object, 3 parts by weight molybdenum oxides, 6 parts by weight cobalt oxides, 1.2 parts by weight lanthanas, 0.6 parts by weight ruthenium-oxide, the oxidation of 0.5 parts by weight
Bismuth, 0.3 parts by weight palladium oxide and 0.2 parts by weight rheium oxide, wherein the porous metal oxide be load have titanium dioxide,
The porous activated alumina particle of magnesia and zinc oxide, the porous metal oxide is by 12 parts by weight of titanium dioxide, 9 weight
Part magnesia, 9 part by weight of zinc oxide and 36 parts by weight of activated aluminium oxide compositions, the grain size of the titanium dioxide is 5 μm, the oxygen
The grain size for changing magnesium is 2 μm, and the grain size of the zinc oxide is 1 μm, and the grain size of the activated alumina is 60 μm, the molybdenum oxide
Grain size is 20-30nm, and the grain size of the cobalt oxide is 60-80nm, and the grain size of the lanthana is 10-15nm, the ruthenium-oxide
Grain size be 5-8nm, the bismuth oxide grain size is 1-3nm, and the grain size of the palladium oxide is 5-8nm, the grain size of the rheium oxide
For 3-5nm；The porous metal oxide preparation method, includes the following steps：
(1.1) prepare raw material：Activated alumina, titanium dioxide, magnesia, zinc oxide, lignocellulosic and grain size are 3-5
μm dry dextrin, the lignocellulosic length are 20-30 μm；
(1.2) dry dextrin is granulated, and the dry dextrin particle that grain size is 20 μm is made；
(1.3) activated alumina particle, titanium dioxide and lignocellulosic mixed grinding that will be got ready in step (1)
Mixture is made in 20min；
(1.4) mixture will be made in dry dextrin particle made from step (1.2) and step (1.3) and obtained do is mixed
Deionized water is added into siccative under conditions of continuing stirring for material, and wet feed is made；Siccative and the mass ratio of deionized water are
20:1, the mixing time being added after deionized water is 20min,
(1.5) by wet feed obtained freeze-day with constant temperature 40min at 100 DEG C in step (1.2), then at 900-950 DEG C
20min is calcined, the solid abrasive after calcining is then blown into 10min with hair-dryer before the milling at 420 μm of particle；
(1.6) by particles rinsed with water 6 times made from step (1.6), the then vacuum drying 40min at 50 DEG C, i.e.,
Obtain the porous metal oxide；
(2) the load weighted porous metal oxide in step (1) and absolute alcohol are mixed, the porous metals oxygen
Compound is dispersed under sonic oscillation effect in absolute alcohol, and mixed solution is made；
(3) by the load weighted cobalt oxide, the molybdenum oxide, the lanthana, the ruthenium-oxide, institute in step (1)
It states bismuth oxide, the palladium oxide and the rheium oxide to be put into mixed solution made from step (2), sonic oscillation 40min, be made
Catalyst wet mixed feed；
(4) by catalyst wet mixed feed vacuum drying 25min obtained in step (3), drying temperature is 100 DEG C, is made
Catalyst dry blend；
(5) catalyst dry blend will be made in step (4) and calcines 20min, calcination temperature 870 under inert gas protection
℃。
The low temperature exhaust gas hydrotreating catalyst being prepared in the present embodiment is denoted as catalyst 1.
Embodiment 2
The present invention provides a kind of low temperature exhaust gas hydrotreating catalyst, composed of the following components：88 parts by weight grain sizes are 360
μm porous metal oxide, 1 parts by weight molybdenum oxide, 7 parts by weight cobalt oxides, 0.7 parts by weight lanthana, 0.8 parts by weight oxidation
Ruthenium, 0.8 parts by weight bismuth oxide, 0.5 parts by weight palladium oxide and 0.4 parts by weight rheium oxide, wherein the porous metal oxide is
Load has the porous activated alumina particle of titanium dioxide, magnesia and zinc oxide, and the porous metal oxide is by 12 weight
Part titanium dioxide, 6 parts by weight magnesia, 8 part by weight of zinc oxide and 48 parts by weight of activated aluminium oxide compositions, the titanium dioxide
Grain size is 8 μm, and the grain size of the magnesia is 4 μm, and the grain size of the zinc oxide is 2 μm, and the grain size of the activated alumina is
50 μm, the grain size of the molybdenum oxide is 30-50nm, and the grain size of the cobalt oxide is 20-30nm, and the grain size of the lanthana is
The grain size of 15-20nm, the ruthenium-oxide are 8-10nm, and the bismuth oxide grain size is 3-6nm, and the grain size of the palladium oxide is 3-
The grain size of 5nm, the rheium oxide are 1-3nm.
The preparation method of low temperature exhaust gas hydrotreating catalyst in the present embodiment, includes the following steps：
(1) prepare raw material：Prepare raw material according to following parts by weight：The porous metals that 88 parts by weight grain sizes are 360 μm aoxidize
Object, 1 parts by weight molybdenum oxide, 7 parts by weight cobalt oxides, 0.7 parts by weight lanthana, 0.8 parts by weight ruthenium-oxide, the oxidation of 0.8 parts by weight
Bismuth, 0.5 parts by weight palladium oxide and 0.4 parts by weight rheium oxide, wherein the porous metal oxide be load have titanium dioxide,
The porous activated alumina particle of magnesia and zinc oxide, the porous metal oxide is by 12 parts by weight of titanium dioxide, 6 weight
Part magnesia, 8 part by weight of zinc oxide and 48 parts by weight of activated aluminium oxide compositions, the grain size of the titanium dioxide is 8 μm, the oxygen
The grain size for changing magnesium is 4 μm, and the grain size of the zinc oxide is 2 μm, and the grain size of the activated alumina is 50 μm, the molybdenum oxide
Grain size is 30-50nm, and the grain size of the cobalt oxide is 20-30nm, and the grain size of the lanthana is 15-20nm, the ruthenium-oxide
Grain size be 8-10nm, the bismuth oxide grain size is 3-6nm, and the grain size of the palladium oxide is 3-5nm, the grain size of the rheium oxide
For 1-3nm；The porous metal oxide preparation method, includes the following steps：
(1.1) prepare raw material：Activated alumina, titanium dioxide, magnesia, zinc oxide, lignocellulosic and grain size are 3-5
μm dry dextrin, the lignocellulosic length are 20-30 μm；
(1.2) dry dextrin is granulated, and the dry dextrin particle that grain size is 30 μm is made；
(1.3) activated alumina particle, titanium dioxide and lignocellulosic mixed grinding that will be got ready in step (1)
Mixture is made in 25min；
(1.4) mixture will be made in dry dextrin particle made from step (1.2) and step (1.3) and obtained do is mixed
Deionized water is added into siccative under conditions of continuing stirring for material, and wet feed is made；Siccative and the mass ratio of deionized water are
23:1, the mixing time being added after deionized water is 30min,
(1.5) by wet feed obtained freeze-day with constant temperature 40min at 100 DEG C in step (1.2), then at 950-1050 DEG C
25min is calcined, the solid abrasive after calcining is then blown into 10min with hair-dryer before the milling at 360 μm of particle；
(1.6) by particles rinsed with water 6 times made from step (1.6), the then vacuum drying 50min at 45 DEG C, i.e.,
Obtain the porous metal oxide；
(2) the load weighted porous metal oxide in step (1) and absolute alcohol are mixed, the porous metals oxygen
Compound is dispersed under sonic oscillation effect in absolute alcohol, and mixed solution is made；
(3) by the load weighted cobalt oxide, the molybdenum oxide, the lanthana, the ruthenium-oxide, institute in step (1)
It states bismuth oxide, the palladium oxide and the rheium oxide to be put into mixed solution made from step (2), sonic oscillation 50min, be made
Catalyst wet mixed feed；
(4) by catalyst wet mixed feed vacuum drying 20min obtained in step (3), drying temperature is 80 DEG C, is made and urges
Agent dry blend；
(5) catalyst dry blend will be made in step (4) and calcines 30min, calcination temperature 820 under inert gas protection
℃。
The low temperature exhaust gas hydrotreating catalyst being prepared in the present embodiment is denoted as catalyst 2.
Embodiment 3
The present invention provides a kind of low temperature exhaust gas hydrotreating catalyst, composed of the following components：80 parts by weight grain sizes are 300
μm porous metal oxide, 4 parts by weight molybdenum oxides, 2 parts by weight cobalt oxides, 1 parts by weight lanthana, 0.7 parts by weight ruthenium-oxide,
0.3 parts by weight bismuth oxide, 0.2 parts by weight palladium oxide and 0.3 parts by weight rheium oxide, wherein the porous metal oxide is negative
It is loaded with the porous activated alumina particle of titanium dioxide, magnesia and zinc oxide, the porous metal oxide is by 20 parts by weight
Titanium dioxide, 5 parts by weight magnesia, 10 part by weight of zinc oxide and 30 parts by weight of activated aluminium oxide compositions, the titanium dioxide
Grain size is 5 μm, and the grain size of the magnesia is 1 μm, and the grain size of the zinc oxide is 1 μm, and the grain size of the activated alumina is
75 μm, the grain size of the molybdenum oxide is 10-20nm, and the grain size of the cobalt oxide is 30-60nm, and the grain size of the lanthana is
The grain size of 10-15nm, the ruthenium-oxide are 5-10nm, and the bismuth oxide grain size is 1-3nm, and the grain size of the palladium oxide is 5-
The grain size of 8nm, the rheium oxide are 1-3nm.
The preparation method of low temperature exhaust gas hydrotreating catalyst in the present embodiment, includes the following steps：
(1) prepare raw material：Prepare raw material according to following parts by weight：The porous metals that 80 parts by weight grain sizes are 300 μm aoxidize
Object, 4 parts by weight molybdenum oxides, 2 parts by weight cobalt oxides, 1 parts by weight lanthana, 0.7 parts by weight ruthenium-oxide, 0.3 parts by weight bismuth oxide,
0.2 parts by weight palladium oxide and 0.3 parts by weight rheium oxide, wherein the porous metal oxide, which is load, titanium dioxide, oxidation
The porous activated alumina particle of magnesium and zinc oxide, the porous metal oxide is by 20 parts by weight of titanium dioxide, 5 parts by weight oxygen
Change magnesium, 10 part by weight of zinc oxide and 30 parts by weight of activated aluminium oxide compositions, the grain size of the titanium dioxide is 5 μm, the oxidation
The grain size of magnesium is 1 μm, and the grain size of the zinc oxide is 1 μm, and the grain size of the activated alumina is 75 μm, the grain of the molybdenum oxide
Diameter is 10-20nm, and the grain size of the cobalt oxide is 30-60nm, and the grain size of the lanthana is 10-15nm, the ruthenium-oxide
Grain size is 5-10nm, and the bismuth oxide grain size is 1-3nm, and the grain size of the palladium oxide is 5-8nm, and the grain size of the rheium oxide is
1-3nm；The porous metal oxide preparation method, includes the following steps：
(1.1) prepare raw material：Activated alumina, titanium dioxide, magnesia, zinc oxide, lignocellulosic and grain size are 3-5
μm dry dextrin, the lignocellulosic length are 20-30 μm；
(1.2) dry dextrin is granulated, and the dry dextrin particle that grain size is 15 μm is made；
(1.3) activated alumina particle, titanium dioxide and lignocellulosic mixed grinding that will be got ready in step (1)
Mixture is made in 30min；
(1.4) mixture will be made in dry dextrin particle made from step (1.2) and step (1.3) and obtained do is mixed
Deionized water is added into siccative under conditions of continuing stirring for material, and wet feed is made；Siccative and the mass ratio of deionized water are
21:1, the mixing time being added after deionized water is 25min,
(1.5) by wet feed obtained freeze-day with constant temperature 30min at 110 DEG C in step (1.2), then at 1100-1200 DEG C
Lower calcining 15min, then blows 10min with hair-dryer before the milling by the solid abrasive after calcining at 300 μm of particle；
(1.6) by particles rinsed with water 6 times made from step (1.6), the then vacuum drying 45min at 45 DEG C, i.e.,
Obtain the porous metal oxide；
(2) the load weighted porous metal oxide in step (1) and absolute alcohol are mixed, the porous metals oxygen
Compound is dispersed under sonic oscillation effect in absolute alcohol, and mixed solution is made；
(3) by the load weighted cobalt oxide, the molybdenum oxide, the lanthana, the ruthenium-oxide, institute in step (1)
It states bismuth oxide, the palladium oxide and the rheium oxide to be put into mixed solution made from step (2), sonic oscillation 60min, be made
Catalyst wet mixed feed；
(4) by catalyst wet mixed feed vacuum drying 30min obtained in step (3), drying temperature is 110 DEG C, is made
Catalyst dry blend；
(5) catalyst dry blend will be made in step (4) and calcines 30min, calcination temperature 850 under inert gas protection
℃。
The low temperature exhaust gas hydrotreating catalyst being prepared in the present embodiment is denoted as catalyst 3.
Embodiment 4
The present invention provides a kind of low temperature exhaust gas hydrotreating catalyst, composed of the following components：90 parts by weight grain sizes are 480
μm porous metal oxide, 5 parts by weight molybdenum oxides, 4 parts by weight cobalt oxides, 0.5 parts by weight lanthana, 0.64 parts by weight oxidation
Ruthenium, 0.6 parts by weight bismuth oxide, 0.6 parts by weight palladium oxide and 0.24 parts by weight rheium oxide, wherein the porous metal oxide
There is the porous activated alumina particle of titanium dioxide, magnesia and zinc oxide for load, the porous metal oxide is by 10 weights
Measure part titanium dioxide, 6 parts by weight magnesia, 8 part by weight of zinc oxide and 50 parts by weight of activated aluminium oxide compositions, the titanium dioxide
Grain size be 8 μm, the grain size of the magnesia is 3 μm, and the grain size of the zinc oxide is 2 μm, the grain size of the activated alumina
It it is 65 μm, the grain size of the molybdenum oxide is 20-40nm, and the grain size of the cobalt oxide is 20-60nm, and the grain size of the lanthana is
The grain size of 10-20nm, the ruthenium-oxide are 5-10nm, and the bismuth oxide grain size is 2-5nm, and the grain size of the palladium oxide is 3-
The grain size of 6nm, the rheium oxide are 2-4nm.
The preparation method of low temperature exhaust gas hydrotreating catalyst in the present embodiment, includes the following steps：
(1) prepare raw material：Prepare raw material according to following parts by weight：The porous metals that 90 parts by weight grain sizes are 480 μm aoxidize
Object, 5 parts by weight molybdenum oxides, 4 parts by weight cobalt oxides, 0.5 parts by weight lanthana, 0.64 parts by weight ruthenium-oxide, the oxidation of 0.6 parts by weight
Bismuth, 0.6 parts by weight palladium oxide and 0.24 parts by weight rheium oxide, wherein the porous metal oxide be load have titanium dioxide,
The porous activated alumina particle of magnesia and zinc oxide, the porous metal oxide is by 10 parts by weight of titanium dioxide, 6 weight
Part magnesia, 8 part by weight of zinc oxide and 50 parts by weight of activated aluminium oxide compositions, the grain size of the titanium dioxide is 8 μm, the oxygen
The grain size for changing magnesium is 3 μm, and the grain size of the zinc oxide is 2 μm, and the grain size of the activated alumina is 65 μm, the molybdenum oxide
Grain size is 20-40nm, and the grain size of the cobalt oxide is 20-60nm, and the grain size of the lanthana is 10-20nm, the ruthenium-oxide
Grain size be 5-10nm, the bismuth oxide grain size is 2-5nm, and the grain size of the palladium oxide is 3-6nm, the grain size of the rheium oxide
For 2-4nm；The porous metal oxide preparation method, includes the following steps：
(1.1) prepare raw material：Activated alumina, titanium dioxide, magnesia, zinc oxide, lignocellulosic and grain size are 3-5
μm dry dextrin, the lignocellulosic length are 20-30 μm；
(1.2) dry dextrin is granulated, and the dry dextrin particle that grain size is 15 μm is made；
(1.3) activated alumina particle, titanium dioxide and lignocellulosic mixed grinding that will be got ready in step (1)
Mixture is made in 26min；
(1.4) mixture will be made in dry dextrin particle made from step (1.2) and step (1.3) and obtained do is mixed
Deionized water is added into siccative under conditions of continuing stirring for material, and wet feed is made；Siccative and the mass ratio of deionized water are
24:1, the mixing time being added after deionized water is 25min,
(1.5) by wet feed obtained freeze-day with constant temperature 40min at 100 DEG C in step (1.2), then at 950-1050 DEG C
30min is calcined, the solid abrasive after calcining is then blown into 10min with hair-dryer before the milling at 480 μm of particle；
(1.6) by particles rinsed with water 6 times made from step (1.6), the then vacuum drying 35min at 50 DEG C, i.e.,
Obtain the porous metal oxide；
(2) the load weighted porous metal oxide in step (1) and absolute alcohol are mixed, the porous metals oxygen
Compound is dispersed under sonic oscillation effect in absolute alcohol, and mixed solution is made；
(3) by the load weighted cobalt oxide, the molybdenum oxide, the lanthana, the ruthenium-oxide, institute in step (1)
It states bismuth oxide, the palladium oxide and the rheium oxide to be put into mixed solution made from step (2), sonic oscillation 45min, be made
Catalyst wet mixed feed；
(4) by catalyst wet mixed feed vacuum drying 25min obtained in step (3), drying temperature is 120 DEG C, is made
Catalyst dry blend；
(5) catalyst dry blend will be made in step (4) and calcines 25min, calcination temperature 830 under inert gas protection
℃。
The low temperature exhaust gas hydrotreating catalyst being prepared in the present embodiment is denoted as catalyst 4.
Embodiment 5
The present invention provides a kind of low temperature exhaust gas hydrotreating catalyst, composed of the following components：84 parts by weight grain sizes are 500
μm porous metal oxide, 3 parts by weight molybdenum oxides, 6 parts by weight cobalt oxides, 0.8 parts by weight lanthana, 0.72 parts by weight oxidation
Ruthenium, 0.64 parts by weight bismuth oxide, 0.48 parts by weight palladium oxide and 0.36 parts by weight rheium oxide, wherein the porous metals oxidation
Object is the porous activated alumina particle that load has titanium dioxide, magnesia and zinc oxide, and the porous metal oxide is by 16
Parts by weight of titanium dioxide, 6 parts by weight magnesia, 8 part by weight of zinc oxide and 40 parts by weight of activated aluminium oxide compositions, the titanium dioxide
The grain size of titanium is 10 μm, and the grain size of the magnesia is 3 μm, and the grain size of the zinc oxide is 3 μm, the grain of the activated alumina
Diameter is 75 μm, and the grain size of the molybdenum oxide is 20-50nm, and the grain size of the cobalt oxide is 40-80nm, the grain size of the lanthana
Grain size for 10-20nm, the ruthenium-oxide is 5-10nm, and the bismuth oxide grain size is 3-6nm, and the grain size of the palladium oxide is 5-
The grain size of 8nm, the rheium oxide are 1-5nm.
The preparation method of low temperature exhaust gas hydrotreating catalyst in the present embodiment, includes the following steps：
(1) prepare raw material：Prepare raw material according to following parts by weight：The porous metals that 84 parts by weight grain sizes are 500 μm aoxidize
Object, 3 parts by weight molybdenum oxides, 6 parts by weight cobalt oxides, 0.8 parts by weight lanthana, 0.72 parts by weight ruthenium-oxide, 0.64 parts by weight oxygen
Change bismuth, 0.48 parts by weight palladium oxide and 0.36 parts by weight rheium oxide, wherein the porous metal oxide, which is load, titanium dioxide
The porous activated alumina particle of titanium, magnesia and zinc oxide, the porous metal oxide is by 16 parts by weight of titanium dioxide, 6
Parts by weight magnesia, 8 part by weight of zinc oxide and 40 parts by weight of activated aluminium oxide compositions, the grain size of the titanium dioxide is 10 μm,
The grain size of the magnesia is 3 μm, and the grain size of the zinc oxide is 3 μm, and the grain size of the activated alumina is 75 μm, the oxygen
The grain size for changing molybdenum is 20-50nm, and the grain size of the cobalt oxide is 40-80nm, and the grain size of the lanthana is 10-20nm, described
The grain size of ruthenium-oxide is 5-10nm, and the bismuth oxide grain size is 3-6nm, and the grain size of the palladium oxide is 5-8nm, the rheium oxide
Grain size be 1-5nm；The porous metal oxide preparation method, includes the following steps：
(1.1) prepare raw material：Activated alumina, titanium dioxide, magnesia, zinc oxide, lignocellulosic and grain size are 3-5
μm dry dextrin, the lignocellulosic length are 20-30 μm；
(1.2) dry dextrin is granulated, and the dry dextrin particle that grain size is 30 μm is made；
(1.3) activated alumina particle, titanium dioxide and lignocellulosic mixed grinding that will be got ready in step (1)
Mixture is made in 30min；
(1.4) mixture will be made in dry dextrin particle made from step (1.2) and step (1.3) and obtained do is mixed
Deionized water is added into siccative under conditions of continuing stirring for material, and wet feed is made；Siccative and the mass ratio of deionized water are
22.5:1, the mixing time being added after deionized water is 30min,
(1.5) by wet feed obtained freeze-day with constant temperature 40min at 100 DEG C in step (1.2), then at 1030-10800 DEG C
Lower calcining 20min, then blows 10min with hair-dryer before the milling by the solid abrasive after calcining at 500 μm of particle；
(1.6) by particles rinsed with water 6 times made from step (1.6), the then vacuum drying 35min at 50 DEG C, i.e.,
Obtain the porous metal oxide；
(2) the load weighted porous metal oxide in step (1) and absolute alcohol are mixed, the porous metals oxygen
Compound is dispersed under sonic oscillation effect in absolute alcohol, and mixed solution is made；
(3) by the load weighted cobalt oxide, the molybdenum oxide, the lanthana, the ruthenium-oxide, institute in step (1)
It states bismuth oxide, the palladium oxide and the rheium oxide to be put into mixed solution made from step (2), sonic oscillation 50min, be made
Catalyst wet mixed feed；
(4) by catalyst wet mixed feed vacuum drying 25min obtained in step (3), drying temperature is 105 DEG C, is made
Catalyst dry blend；
(5) catalyst dry blend will be made in step (4) and calcines 20min, calcination temperature 835 under inert gas protection
℃。
The low temperature exhaust gas hydrotreating catalyst being prepared in the present embodiment is denoted as catalyst 5.
Embodiment 6
Low temperature exhaust gas hydrotreating catalyst in the present embodiment and low temperature exhaust gas hydrotreating catalyst in embodiment 5
Difference lies in：The grain size of the titanium dioxide is 5-10 μm, and the grain size of the magnesia is 1-3 μm, the grain size of the zinc oxide
It it is 1-3 μm, the grain size of the activated alumina is 75 μm, and the grain size of the molybdenum oxide is 10-50nm, the grain size of the cobalt oxide
Grain size for 20-80nm, the lanthana is 10-20nm, and the grain size of the ruthenium-oxide is 5-10nm, and the bismuth oxide grain size is
The grain size of 1-6nm, the palladium oxide are 3-8nm, and the grain size of the rheium oxide is 1-5nm.Low temperature exhaust gas adds hydrogen in the present embodiment
It is identical as the preparation method of low temperature exhaust gas hydrotreating catalyst in embodiment 5 to handle catalyst.
The low temperature exhaust gas hydrotreating catalyst being prepared in the present embodiment is denoted as catalyst 6.
Comparative example
Low temperature exhaust gas hydrotreating catalyst in the present embodiment is composed of the following components：84 parts by weight grain sizes are 500 μm
Porous metal oxide, 3 parts by weight molybdenum oxides and 6 parts by weight molybdenum oxides, wherein the porous metal oxide is by 40 weight
Part activated alumina and 16 parts by weight of titanium dioxide composition.The preparation method of low temperature exhaust gas hydrotreating catalyst in the present embodiment
It is identical as the preparation method of low temperature exhaust gas hydrotreating catalyst in embodiment 5.
The low temperature exhaust gas hydrotreating catalyst being prepared in the present embodiment is denoted as comparative catalyst.
Catalyst performance evaluation
1. catalyst SO2Hydrogenation activity is evaluated
Low temperature exhaust gas hydrotreating recycling catalyst made from embodiment 1-6 and comparative example is respectively crushed into 20-
Then 40 mesh take 5ml to be packed into the stainless steel qualitative response device that internal diameter is 14mm, the quartz sand of top filling same particle sizes is mixed
Close preheating.Reacting furnace uses Electric heating, catalyst layer position approximation isothermal furnace body.Using Japanese Shimadzu GC-14B gas phase colors
H in spectrometer on-line analysis reactor inlet and exit gas2S SO2And CS2Content, using GDX-301 carriers analyze vulcanize
Object, 120 DEG C of column temperature, thermal conductivity detector (TCD), hydrogen are carrier gas, flow velocity 28mL/min after column.
In the present invention, conventional dry presulfurization is carried out to catalyst, conditions of vulcanization is：Pressure is 0.1MPa, volume space velocity
For 1200h-1, vulcanization gas used is the hydrogen sulfide that hydrogen adds 2% volume.
Vulcanisation step：With nitrogen temperature, nitrogen amount is adjusted by air speed, 200 DEG C is warming up to 50 DEG C/h, cuts off nitrogen,
It is switched to vulcanization gas, and adjusts tolerance, is continuously heating to 250 DEG C, constant temperature 3h, after reactor entrance hydrogen sulfide equilibrium, knot
Beam vulcanizes, and is switched to reaction gas.Reaction gas group becomes SO21.0%, H26%, remaining is nitrogen.With 3H2+SO2→H2S+2H2O is
Index is reacted, and the SO of catalyst is investigated2Hydrogenation activity.Gas volume air speed is 1200h-1, reaction temperature be 210 DEG C, 220 DEG C and
240℃.The SO of catalyst is calculated according to the following formula2Hydrogenation activity：
Wherein, M0And M1Respectively represent SO at entrance and exit2Volumetric concentration.
The SO of catalyst 1-6 and comparative catalyst2Hydrogenation activity evaluation result is as shown in table 1.
The SO of 1 different catalyst samples of table2Hydrogenation activity
| Catalyst sample | Catalyst 1 | Catalyst 2 | Catalyst 3 | Catalyst 4 | Catalyst 5 | Catalyst 6 | Comparative catalyst |
| Conversion ratio (210 DEG C) | ≥92 | ≥95 | ≥93 | ≥94 | ≥97 | ≥99 | 68 |
| Conversion ratio (220 DEG C) | ≥95 | ≥99 | ≥96 | ≥98 | 100 | 100 | 82 |
| Conversion ratio (240 DEG C) | 100 | 100 | 100 | 100 | 100 | 100 | ≥95 |
Result can be seen that catalyst of the present invention in 210 DEG C of reaction temperature from table 1, and sulfur dioxide hydrogenation activity is
Up to 92% or more, and in 220 DEG C of reaction temperature, the sulfur dioxide hydrogenation activity of catalyst of the present invention has been up to 95%
More than, the SO in exit2It can not be detected.
2. pair tempreture organic sulphur hydrolysis activity rating
With CS2+2H2O→CO2+2H2S reacts for index, investigates the tempreture organic sulphur hydrolysis activity of catalyst, inlet gas composition
For CS21%, SO21%, O23000ppm、H2030% and surplus N2, gas volume air speed is 2500h-1, reaction temperature 210
DEG C, 240 DEG C, 280 DEG C and 320 DEG C, according to the following formula calculate catalyst CS2Percent hydrolysis：
Wherein, C0And C1Respectively entrance and exit CS2Volumetric concentration.
The hydrolysing activity evaluation result to organic sulfur of catalyst sample 1-6 and comparative catalyst are as shown in table 2.
2 different catalyst samples of table compare the hydrolysing activity of organic sulfur
| Catalyst sample | Catalyst 1 | Catalyst 2 | Catalyst 3 | Catalyst 4 | Catalyst 5 | Catalyst 6 | Comparative catalyst |
| Conversion ratio (210 DEG C) | 91 | 93 | 92 | 93 | 97 | ≥99.6 | 56 |
| Conversion ratio (240 DEG C) | 96 | 100 | 97 | 100 | 100 | 100 | 75 |
| Conversion ratio (280 DEG C) | 100 | 100 | 100 | 100 | 100 | 100 | 97 |
| Conversion ratio (320 DEG C) | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
It is most high to can be seen that tempreture organic sulphur hydrolysis activity of the catalyst in the present invention at 210 DEG C for result from table 2
Up to 100%.
Using the size grading of raw material in embodiment in the present invention 6, the active component in raw material can be made with active oxidation
Aluminium is that core is evenly dispersed, the phenomenon that reunion without active component, effectively increases the catalytic efficiency of catalyst.
The above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be to the present invention
The restriction of embodiment can also make on the basis of the above description for those of ordinary skill in the art
Other various forms of variations or variation here can not be exhaustive all embodiments, every skill for belonging to the present invention
Row of the obvious changes or variations that art scheme is extended out still in protection scope of the present invention.
Claims (10)
1. a kind of low temperature exhaust gas hydrotreating catalyst, which is characterized in that composed of the following components：80-90 parts by weight grain sizes are
300-500 μm of porous metal oxide, 1-5 parts by weight molybdenum oxide, 2-7 parts by weight cobalt oxide, the oxidation of 0.5-1.2 parts by weight
Lanthanum, 0.6-0.8 parts by weight ruthenium-oxide, 0.3-0.8 parts by weight bismuth oxide, 0.2-0.6 parts by weight palladium oxide and 0.2-0.4 parts by weight
Rheium oxide, the porous metal oxide are the porous activated alumina particle that load has titanium dioxide, magnesia and zinc oxide.
2. low temperature exhaust gas hydrotreating catalyst according to claim 1, which is characterized in that the porous metal oxide
By 10-20 parts by weight of titanium dioxide, 5-10 parts by weight magnesia, 5-10 part by weight of zinc oxide and the parts by weight of activated oxidations of 30-50
Aluminium forms.
3. low temperature exhaust gas hydrotreating catalyst according to claim 2, which is characterized in that the grain size of titanium dioxide is 5-
10 μm, the grain size of the magnesia is 1-3 μm, and the grain size of the zinc oxide is 1-3 μm, and the grain size of activated alumina is 50-75 μ
m。
4. low temperature exhaust gas hydrotreating catalyst according to claim 1, which is characterized in that the grain size of the molybdenum oxide is
The grain size of 10-50nm, the cobalt oxide are 20-80nm.
5. according to any low temperature exhaust gas hydrotreating catalysts of claim 1-4, which is characterized in that the lanthana
Grain size is 10-20nm, and the grain size of the ruthenium-oxide is 5-10nm, and the bismuth oxide grain size is 1-6nm, the grain size of the palladium oxide
Grain size for 3-8nm, the rheium oxide is 1-5nm.
6. the preparation method of any low temperature exhaust gas hydrotreating catalysts of claim 1-5, which is characterized in that including such as
Lower step：
(1) prepare raw material：Prepare raw material according to following parts by weight：The porous metals oxygen that 80-90 parts by weight grain sizes are 300-500 μm
Compound, 1-5 parts by weight molybdenum oxide, 2-7 parts by weight cobalt oxide, 0.5-1.2 parts by weight lanthana, 0.6-0.8 parts by weight ruthenium-oxide,
0.3-0.8 parts by weight bismuth oxide, 0.2-0.6 parts by weight palladium oxide and 0.2-0.4 parts by weight rheium oxides, the porous metals oxidation
Object is the porous activated alumina particle that load has titanium dioxide, magnesia and zinc oxide；
(2) the load weighted porous metal oxide in step (1) and absolute alcohol are mixed, the porous metal oxide
It is dispersed in absolute alcohol under sonic oscillation effect, mixed solution is made；
(3) by the load weighted cobalt oxide, the molybdenum oxide, the lanthana, the ruthenium-oxide, the oxygen in step (1)
Change bismuth, the palladium oxide and the rheium oxide to be put into mixed solution made from step (2), sonic oscillation 30-60min is made
Catalyst wet mixed feed；
(4) by catalyst wet mixed feed vacuum drying 20-30min obtained in step (3), drying temperature is 80-120 DEG C, system
Obtain catalyst dry blend；
(5) catalyst dry blend will be made in step (4) and calcines 20-30min, calcination temperature 750- under inert gas protection
900℃。
7. the preparation method of low temperature exhaust gas hydrotreating catalyst according to claim 6, which is characterized in that step (1)
Described in the preparation method of porous metal oxide include the following steps：
(1.1) prepare raw material：Activated alumina, titanium dioxide, magnesia, zinc oxide, lignocellulosic and grain size are 0.5-5 μm
Dry dextrin；
(1.2) dry dextrin is granulated, and the dry dextrin particle that grain size is 15-30 μm is made；
(1.3) by the activated alumina particle got ready in step (1), titanium dioxide and lignocellulosic mixed grinding 20-30min
Mixture is made；
(1.4) mixture will be made in dry dextrin particle made from step (1.2) and step (1.3) and obtained siccative is mixed,
Deionized water is added into siccative under conditions of continuing stirring, wet feed is made；Siccative and the mass ratio of deionized water are 20-
24:1, the mixing time being added after deionized water is 20-30min,
(1.5) by wet feed obtained freeze-day with constant temperature 30-40min at 100-120 DEG C in step (1.2), then in 900-1200
15-30min is calcined at DEG C, then by the solid abrasive after calcining at 300-500 μm of particle；
(1.6) by particles rinsed with water 4-6 times made from step (1.6), the then vacuum drying 30- at 35-50 DEG C
50min is to get the porous metal oxide.
8. the preparation method of low temperature exhaust gas hydrotreating catalyst according to claim 7, which is characterized in that in step
(1.6) in, 5-10min is blown with hair-dryer before the milling.
9. the preparation method of low temperature exhaust gas hydrotreating catalyst according to claim 8, which is characterized in that step
(1.1) 20-30 μm of the length of lignocellulosic in.
10. the preparation method of low temperature exhaust gas hydrotreating catalyst according to claim 9, which is characterized in that step (5)
In, calcination temperature is 820-850 DEG C.
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