CN102836739A - Method for preparing supported oil product hydrodesulphurization catalyst with solvothermal method at normal pressure - Google Patents
Method for preparing supported oil product hydrodesulphurization catalyst with solvothermal method at normal pressure Download PDFInfo
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Abstract
The invention discloses a method for preparing supported oil product hydrodesulphurization catalyst with solvothermal method at normal pressure. The method comprises the following steps: adding acetylacetone nickel, triphenyl phosphine and MCM-41 interface confucius screen to tri-n-octylamine, and evenly stirring a mixture at room temperature; adding slurry obtained in the first step to a normal-pressure stirring reactor, heating the slurry to 330 DEG C with an increment of 2 DEG C per minute in nitrogen flow of 100mL/min; keeping the temperature constantly for 3 hours, and reducing the temperature to the room temperature, finally, passivating the slurry for 1 hour by O2/N2 mixing gas containing 10% of oxygen; filtering the passivated slurry under reduced pressure by a sand-core hopper; washing an obtained filter cake with mixed solution of ethanol and carbon tetrachloride based on volume ratio of 1: 1 at 50 DEG C; and drying the filter cake at 100 DEG C and tabletting the filter cake so as to obtain a catalyst finished product. According to the invention, the prepared supported oil product hydrodesulphurization catalyst disclosed by the invention has the advantages of soft condition, little dependence on equipment, little impurity and high desulphurization rate.
Description
Technical field:
The invention belongs to oil hydrogenation desulphurization catalyst technical field, be specifically related to the method that solvent-thermal method under a kind of normal pressure prepares support type oil hydrogenation desulphurization catalyst.
Background technology:
Along with people's is to the continuous concern of environmental problem, and environmental regulation is more and more stricter to the restriction of the sulfur content in the fuel oil.The fuel desulfuration technology progressively turns to the degree of depth and ultra-deep desulfurization field, and present commercial transient metal sulfide hydrodesulfurization (HDS) catalyst has been difficult to satisfy this requirement.Therefore, improve original sulfide catalyst and seek the focus that new efficient substitute has become the research of nearest researcher.Ni
2A kind of material that P is in recent years to be found with high hydrodesulfurization activity.At identical test condition, Ni
2P/SiO
2Activity of such catalysts compares NiMo/Al
2O
3And CoMo/Al
2O
3All want high, the active order of similar phosphide is: Ni
2P>WP>MoP>CoP>Fe
2P.Ni
2P has higher mechanical strength, heat endurance, electric conductivity, and special crystal structure and excellent HDS catalytic activity, stability, along with low sulfur ", the no sulfuration trend of environmental regulation proposition, with the substitute that most possibly is the commercial sulfur compound catalyst.
The synthetic Ni that is reported at present
2P catalyst method mainly contains temperature-programmed reduction method, pyrolysis hypophosphites method and solvent-thermal method.Temperature programmed reduction synthesizes Ni
2The P catalyst is usually with nickel nitrate (Ni (NO
3)
26H
2O) and diammonium hydrogen phosphate ((NH
4)
2HPO
4) salt-mixture be presoma; Process is simple but need higher reduction temperature (generally at 600～750 ℃); Not only waste lot of energy in the building-up process, and high temperature can cause the reunion of active phase, and the selection of carrier is had higher requirement (like the TiO of anatase
2Carrier just can not bear so high temperature).Pyrolysis hypophosphites method is synthesized Ni
2The P catalyst is usually with nickel chloride (NiCl
26H
2O) and sodium hypophosphite (NaH
2PO
2H
2O) salt-mixture is a presoma, under nitrogen atmosphere, does not need higher temperature to handle and can generate Ni
2P, but synthetic catalyst contains a large amount of phosphate impurities, so the catalyst hydrodesulfurization active of the preparation of this method is not high.Traditional solvent-thermal method is that the alkali condition high pressure at ammoniacal liquor synthesizes, and perhaps adopting expensive trioctylphosphine phosphorus is the phosphorus source, and normal pressure is synthetic under the liquid phase environment of oleyl amine, owing to receive the restriction of cost and reaction condition, is difficult to realize the requirement of large-scale industrial production.
Summary of the invention:
In order to solve the problem that exists in the background technology; The invention provides the method that solvent-thermal method under a kind of normal pressure prepares support type oil hydrogenation desulphurization catalyst; The present invention has overcome the shortcoming separately of temperature-programmed reduction method, pyrolysis hypophosphites method and the hot method of conventional solvent; Adopting triphenyl phosphorus respectively is the phosphorus source, is liquid-phase reaction system with the tri-n-octyl amine, and required Preparation of Catalyst temperature is about 330 ℃; Be reflected under the normal pressure and carry out, the reduction temperature more required than temperature-programmed reduction method hangs down 300 ℃ at least; The catalyst purity more synthetic than pyrolysis hypophosphites method is high, and is more cheap than traditional solvent-thermal method synthesis condition milder, raw material.In a word, the high and suitable industry popularization of the catalyst desulfurizing performance of this method preparation.
The technical scheme that the present invention adopted is: solvent-thermal method prepares the method for support type oil hydrogenation desulphurization catalyst under a kind of normal pressure:
The first step is equipped with the reaction raw materials slurries:
According to the mesoporous son sieve of nickel acetylacetonate, triphenyl phosphorus and the MCM-41 of certain metering ratio (or TiO
2In carrier) join in the tri-n-octyl amine, at room temperature be stirred to fully and mix.Wherein, the mass ratio of nickel acetylacetonate, triphenyl phosphorus, the mesoporous son sieve of MCM-41, tri-n-octyl amine is 1: (2～10): (0.67～2.60): 32.
Second step, the prepared in reaction catalyst:
The slip that the first step is obtained joins in the normal pressure stirred reactor; Heating rate with 2 ℃ of per minutes in the nitrogen stream of 100 mL/min under stirring condition is heated to 330 ℃; Be cooled to room temperature at constant temperature under this temperature after 3 hours, at last to contain the O of oxygen 10% (V/V)
2/ N
2Gaseous mixture passivation 1 hour.
In the 3rd step, filter, wash and drying:
Slip after the passivation is carried out filtration under diminished pressure with sand core funnel, use ethanol and carbon tetrachloride mixed solution the filter cake (repeat filtration washing 3 time) 50 ℃ following washing and filtering after of volume ratio as 1:1,100 ℃ of down dry back compression moldings are to obtain the catalyst finished product.
This novel beneficial effect that has is: required Preparation of Catalyst temperature is about 330 ℃, is reflected under the normal pressure to carry out, and the reduction temperature more required than temperature-programmed reduction method hangs down 300 ℃ at least; Than the method for pyrolysis hypophosphites, almost there is not phosphate impurity in the synthetic catalysis, the catalytic desulfurhydrogenation performance is high, and synthetic catalyst is more suitable in the theoretical research of doing catalyst of phosphatizing nickel; Littler to the dependence of equipment than traditional solvent-thermal method, raw material is more cheap, is more suitable in commercial production; Active appraisal experiment showed in 120 hours, and the dibenzothiophenes desulfurization degree can remain on about 100 %, and catalyst has demonstrated high activity and stability.
Description of drawings:
Fig. 1 is the XRD analysis result of embodiment 1 sample;
Fig. 2 is that embodiment 1 catalyst sample HDS is active;
Fig. 3 is the XRD analysis result of embodiment 2 samples;
Fig. 4 is that embodiment 2 catalyst sample HDS are active;
Fig. 5 is the XRD analysis result of embodiment 3 samples;
Fig. 6 is that embodiment 3 catalyst sample HDS are active;
The specific embodiment:
Below in conjunction with accompanying drawing the present invention is further specified:
Embodiment 1, synthetic initial Ni/P mol ratio is 1/2 Ni
2The P/MCM-41 catalyst, and catalyst characterized and desulphurizing activated mensuration.
The first step is equipped with the reaction raw materials slurries:
Join in the tri-n-octyl amine according to the mesoporous son sieve of nickel acetylacetonate, triphenyl phosphorus and the MCM-41 of certain metering ratio, at room temperature be stirred to fully and mix.Wherein, the mass ratio of nickel acetylacetonate, triphenyl phosphorus, the mesoporous son sieve of MCM-41, tri-n-octyl amine is 1:2:0.67:32.
Second step, the prepared in reaction catalyst:
The slip that the first step is obtained joins in the normal pressure stirred reactor; Heating rate with 2 ℃ of per minutes in the nitrogen stream of 100 mL/min under stirring condition is heated to 330 ℃; Be cooled to room temperature at constant temperature under this temperature after 3 hours, at last to contain the O of oxygen 10% (V/V)
2/ N
2Gaseous mixture passivation 1 hour.
In the 3rd step, filter, wash and drying:
Slip after the passivation is carried out filtration under diminished pressure with sand core funnel, use ethanol and carbon tetrachloride mixed solution the filter cake (repeat filtration washing 3 time) 50 ℃ following washing and filtering after of volume ratio as 1:1,100 ℃ of down dry back compression moldings are to obtain the catalyst finished product.
Activity rating: evaluating catalyst carries out in the fixed bed high-pressure micro-device.The reaction procatalyst is handled 2 h at 500 ℃ of logical hydrogen (80 ml/min), reduces to 340 ℃ of reaction temperatures again.The model compound that adopts is the mixed solution of dibenzothiophenes, dodecane and decahydronaphthalene, and its content is respectively 2 %, 1 % and 97 %.Wherein, decahydronaphthalene is a solvent, and dodecane is an internal standard compound.Reaction condition is, and 340 ℃, 3.0 MPa, hydrogen-oil ratio 500 (V/V), air speed 2.0 h
-1The liquid product analyses that obtains is carried out on the GC-14C type gas chromatograph of day island proper Tianjin company.
Experimental result: the XRD analysis result of catalyst is as shown in Figure 1.The XRD analysis result shows that the degree of crystallization of catalyst activity phase is very high, locates to occur the obvious diffraction peak about 40.7 °, 44.6 °, 47.3 ° of 2 θ, 54.1 ° 54.8 °, 66.1 °, 72.5 ° and 74.5 °, this and Ni
2Main diffraction maximum (PDF:03-0953) unanimity of P phase, the crystalline phase that shows synthetic catalyst is Ni
2P.The Ni that calculates with the Scherrer formula
2The size of P crystal grain is approximately 20 nm.Do not see other peaks of metal phosphorus and nickel in the XRD spectra, show that nickel phosphide thing in the catalyst sample is mutually all with Ni
2The P form exists.That therefore, this method synthesizes is the Ni of MCM-41 load
2The P catalyst.
The Ni of the MCM-41 load that present embodiment is synthetic
2The hydrodesulfurization activity result of P catalyst is as shown in Figure 2, the reaction time less than 12 hours, activity of such catalysts improves along with the increase in reaction time, at 12 hours, desulfurization reached 100%, and the desulfurization degree of rear catalyst is stabilized in about 100%.Thus it is clear that, the support type Ni that synthesizes through this method
2The P catalyst has good hydrodesulfurization activity.
Embodiment 2, synthetic initial Ni/P mol ratio is 1/6 Ni
2The P/MCM-41 catalyst, and catalyst characterized and desulphurizing activated mensuration.
The first step is equipped with the reaction raw materials slurries:
Join in the tri-n-octyl amine according to the mesoporous son sieve of nickel acetylacetonate, triphenyl phosphorus and the MCM-41 of certain metering ratio, at room temperature be stirred to fully and mix.Wherein, the mass ratio of nickel acetylacetonate, triphenyl phosphorus, the mesoporous son sieve of MCM-41, tri-n-octyl amine is 1:6:0.67:32.
Second step, the prepared in reaction catalyst:
The slip that the first step is obtained joins in the normal pressure stirred reactor; Heating rate with 2 ℃ of per minutes in the nitrogen stream of 100 mL/min under stirring condition is heated to 330 ℃; Be cooled to room temperature at constant temperature under this temperature after 3 hours, at last to contain the O of oxygen 10% (V/V)
2/ N
2Gaseous mixture passivation 1 hour.
In the 3rd step, filter, wash and drying:
Slip after the passivation is carried out filtration under diminished pressure with sand core funnel, use ethanol and carbon tetrachloride mixed solution the filter cake (repeat filtration washing 3 time) 50 ℃ following washing and filtering after of volume ratio as 1:1,100 ℃ of down dry back compression moldings are to obtain the catalyst finished product.
Activity rating: evaluating catalyst carries out in the fixed bed high-pressure micro-device.The reaction procatalyst is handled 2 h at 500 ℃ of logical hydrogen (80 ml/min), reduces to 340 ℃ of reaction temperatures again.The model compound that adopts is the mixed solution of dibenzothiophenes, dodecane and decahydronaphthalene, and its content is respectively 2 %, 1 % and 97 %.Wherein, decahydronaphthalene is a solvent, and dodecane is an internal standard compound.Reaction condition is, and 340 ℃, 3.0 MPa, hydrogen-oil ratio 500 (V/V), air speed 2.0 h
-1The liquid product analyses that obtains is carried out on the GC-14C type gas chromatograph of day island proper Tianjin company.
Experimental result: the XRD analysis result of catalyst is as shown in Figure 3.The XRD analysis result shows that the degree of crystallization of catalyst activity phase is very high, locates to occur the obvious diffraction peak about 40.7 °, 44.6 °, 47.3 ° of 2 θ, 54.1 ° 54.8 °, 66.1 °, 72.5 ° and 74.5 °, this and Ni
2Main diffraction maximum (PDF:03-0953) unanimity of P phase, the crystalline phase that shows synthetic catalyst is Ni
2P.The Ni that calculates with the Scherrer formula
2The size of P crystal grain is approximately 16 nm.Do not see other peaks of metal phosphorus and nickel in the XRD spectra, show that nickel phosphide thing in the catalyst sample is mutually all with Ni
2The P form exists.That therefore, this method synthesizes is the Ni of MCM-41 load
2The P catalyst.
The Ni of the MCM-41 load that present embodiment is synthetic
2The hydrodesulfurization activity result of P catalyst is as shown in Figure 4, the reaction time less than 12 hours, activity of such catalysts improves along with the increase in reaction time, at 12 hours, desulfurization reached 100%, and the desulfurization degree of rear catalyst is stabilized in about 100%.Thus it is clear that, the support type Ni that synthesizes through this method
2The P catalyst has good hydrodesulfurization activity.
Embodiment 3,Synthetic initial Ni/P mol ratio is 1/10 Ni
2The P/MCM-41 catalyst, and catalyst characterized and desulphurizing activated mensuration.
The first step is equipped with the reaction raw materials slurries:
Join in the tri-n-octyl amine according to the mesoporous son sieve of nickel acetylacetonate, triphenyl phosphorus and the MCM-41 of certain metering ratio, at room temperature be stirred to fully and mix.Wherein, the mass ratio of nickel acetylacetonate, triphenyl phosphorus, the mesoporous son sieve of MCM-41, tri-n-octyl amine is 1:10:0.67:32.
Second step, the prepared in reaction catalyst:
The slip that the first step is obtained joins in the normal pressure stirred reactor; Heating rate with 2 ℃ of per minutes in the nitrogen stream of 100 mL/min under stirring condition is heated to 330 ℃; Be cooled to room temperature at constant temperature under this temperature after 3 hours, at last with the O2/N2 gaseous mixture passivation that contains oxygen 10% (V/V) 1 hour.
In the 3rd step, filter, wash and drying:
Slip after the passivation is carried out filtration under diminished pressure with sand core funnel, use ethanol and carbon tetrachloride mixed solution the filter cake (repeat filtration washing 3 time) 50 ℃ following washing and filtering after of volume ratio as 1:1,100 ℃ of down dry back compression moldings are to obtain the catalyst finished product.
Activity rating: evaluating catalyst carries out in the fixed bed high-pressure micro-device.The reaction procatalyst is handled 2 h at 500 ℃ of logical hydrogen (80 ml/min), reduces to 340 ℃ of reaction temperatures again.The model compound that adopts is the mixed solution of dibenzothiophenes, dodecane and decahydronaphthalene, and its content is respectively 2 %, 1 % and 97 %.Wherein, decahydronaphthalene is a solvent, and dodecane is an internal standard compound.Reaction condition is, and 340 ℃, 3.0 MPa, hydrogen-oil ratio 500 (V/V), air speed 2.0 h
-1The liquid product analyses that obtains is carried out on the GC-14C type gas chromatograph of day island proper Tianjin company.
Experimental result: the XRD analysis result of catalyst is as shown in Figure 5.The XRD analysis result shows that the degree of crystallization of catalyst activity phase is very high, locates to occur the obvious diffraction peak about 40.7 °, 44.6 °, 47.3 ° of 2 θ, 54.1 ° 54.8 °, 66.1 °, 72.5 ° and 74.5 °, this and Ni
2Main diffraction maximum (PDF:03-0953) unanimity of P phase, the crystalline phase that shows synthetic catalyst is Ni
2P.The Ni that calculates with the Scherrer formula
2The size of P crystal grain is approximately 14 nm.Do not see other peaks of metal phosphorus and nickel in the XRD spectra, show that nickel phosphide thing in the catalyst sample is mutually all with Ni
2The P form exists.That therefore, this method synthesizes is the Ni of MCM-41 load
2The P catalyst.
The Ni of the MCM-41 load that present embodiment is synthetic
2The hydrodesulfurization activity result of P catalyst is as shown in Figure 6, the reaction time less than 12 hours, activity of such catalysts improves along with the increase in reaction time, at 12 hours, desulfurization reached 100%, and the desulfurization degree of rear catalyst is stabilized in about 100%.Thus it is clear that, the support type Ni that synthesizes through this method
2The P catalyst has good hydrodesulfurization activity.
Claims (3)
1. solvent-thermal method prepares the method for support type oil hydrogenation desulphurization catalyst under the normal pressure, comprises the following steps:
The first step is equipped with the reaction raw materials slurries:
According to the mesoporous son sieve of nickel acetylacetonate, triphenyl phosphorus and the MCM-41 of certain metering ratio (or TiO
2In carrier) join in the tri-n-octyl amine, at room temperature be stirred to fully and mix.
2. wherein, by the nickel acetylacetonate of quality: the mesoporous son sieve of triphenyl phosphorus: MCM-41 (or TiO
2): in the tri-n-octyl amine=1: (2～10): (0.67～2.60): 32,
Second step, the prepared in reaction catalyst
The slip that the first step is obtained joins in the normal pressure stirred reactor; Heating rate with 2 ℃ of per minutes in the nitrogen stream of 100 mL/min under stirring condition is heated to 330 ℃; Be cooled to room temperature at constant temperature under this temperature after 3 hours, at last to contain the O of oxygen 10% (V/V)
2/ N
2Gaseous mixture passivation 1 hour.
3. three, filter, washing and dry
Slip after the passivation is carried out filtration under diminished pressure with sand core funnel, use ethanol and carbon tetrachloride mixed solution the filter cake (repeat filtration washing 3 time) 50 ℃ following washing and filtering after of volume ratio as 1:1,100 ℃ of down dry back compression moldings are to obtain the catalyst finished product.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103861625A (en) * | 2014-02-28 | 2014-06-18 | 天津大学 | Preparation method of supported Ni2P catalyst |
| CN104117382A (en) * | 2013-04-26 | 2014-10-29 | 中国石油天然气股份有限公司 | Hydrothermal synthesis method for preparation of loaded type nickel phosphide catalyst |
| CN107088432A (en) * | 2017-04-12 | 2017-08-25 | 南京师范大学 | A kind of two-dimentional Ru doping Ni2P plate-like nano flakes and its preparation method and application |
| CN113426463A (en) * | 2021-07-01 | 2021-09-24 | 中国石油大学(华东) | In-situ preparation and application of high-efficiency non-supported porous sulfurized nickel-molybdenum catalyst |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104117382A (en) * | 2013-04-26 | 2014-10-29 | 中国石油天然气股份有限公司 | Hydrothermal synthesis method for preparation of loaded type nickel phosphide catalyst |
| CN103861625A (en) * | 2014-02-28 | 2014-06-18 | 天津大学 | Preparation method of supported Ni2P catalyst |
| CN107088432A (en) * | 2017-04-12 | 2017-08-25 | 南京师范大学 | A kind of two-dimentional Ru doping Ni2P plate-like nano flakes and its preparation method and application |
| CN107088432B (en) * | 2017-04-12 | 2019-09-06 | 南京师范大学 | A kind of two dimension Ru doping Ni2P plate-like nano flake and its preparation method and application |
| CN113426463A (en) * | 2021-07-01 | 2021-09-24 | 中国石油大学(华东) | In-situ preparation and application of high-efficiency non-supported porous sulfurized nickel-molybdenum catalyst |
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