CN110404547A - A kind of catalyst and its preparation method and application - Google Patents
A kind of catalyst and its preparation method and application Download PDFInfo
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- CN110404547A CN110404547A CN201910721240.3A CN201910721240A CN110404547A CN 110404547 A CN110404547 A CN 110404547A CN 201910721240 A CN201910721240 A CN 201910721240A CN 110404547 A CN110404547 A CN 110404547A
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- catalyst
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- orthosilicic acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/80—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with zinc, cadmium or mercury
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/03—Precipitation; Co-precipitation
- B01J37/036—Precipitation; Co-precipitation to form a gel or a cogel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/082—Decomposition and pyrolysis
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
- C01B3/323—Catalytic reaction of gaseous or liquid organic compounds other than hydrocarbons with gasifying agents
- C01B3/326—Catalytic reaction of gaseous or liquid organic compounds other than hydrocarbons with gasifying agents characterised by the catalyst
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/02—Processes for making hydrogen or synthesis gas
- C01B2203/0205—Processes for making hydrogen or synthesis gas containing a reforming step
- C01B2203/0227—Processes for making hydrogen or synthesis gas containing a reforming step containing a catalytic reforming step
- C01B2203/0233—Processes for making hydrogen or synthesis gas containing a reforming step containing a catalytic reforming step the reforming step being a steam reforming step
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/10—Catalysts for performing the hydrogen forming reactions
- C01B2203/1041—Composition of the catalyst
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/10—Catalysts for performing the hydrogen forming reactions
- C01B2203/1041—Composition of the catalyst
- C01B2203/1076—Copper or zinc-based catalysts
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/10—Catalysts for performing the hydrogen forming reactions
- C01B2203/1041—Composition of the catalyst
- C01B2203/1082—Composition of support materials
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- Chemical Kinetics & Catalysis (AREA)
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- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Combustion & Propulsion (AREA)
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Abstract
The present invention relates to a kind of catalyst and its preparation method and application.The catalyst includes active constituent and carrier, and the active constituent includes copper ion, aluminium ion and zinc ion, and the carrier is using orthosilicic acid as the gelinite of raw material.The physics appendix in traditional catalyst between catalyst active component and catalyst carrier is converted chemical appendix by catalyst provided by the invention.And optimize active constituent combination and active constituent and carrier ingredient ratio, using the catalytic activity with higher of catalyst prepared by method provided by the present invention, better stability and weatherability.Above-mentioned catalyst has excellent application performance in the reaction of catalysis methanol reformation hydrogen production.
Description
Technical field
The present invention relates to the technical field of improvement of catalyst, more particularly to a kind of catalyst and preparation method thereof and answer
With.
Background technique
Hydrogen production from methanol-steam reforming hydrogen production efficiency with higher, production process cleanliness without any pollution, instrument size can
Control；It is easy to same hydrogenation stations, fuel cell etc. to be integrated.Copper catalyst is that current methanol recapitalization field is most widely used
One of catalyst.However, it can be inactivated in use because of the variation of carrier structure, and then it will cause and reform one in gas
The raising of content of carbon oxide influences its subsequent use.
In addition, currently, used catalyst carrier mostly be by copper catalyst physical attachment on porous material surface,
Poor adhesive force, be unevenly distributed, surface area is opposite to reduce, cause the catalytic efficiency of catalyst to decline.
Summary of the invention
Based on drawbacks described above, the present invention provides a kind of catalyst and its preparation method and application.Specific technical solution is such as
Under:
A kind of catalyst, including active constituent and carrier；Wherein, the active constituent includes copper ion (Cu2+), aluminium from
Son (Al3+) and zinc ion (Zn2+), the carrier is using orthosilicic acid as the gelinite of raw material.
It will be understood by those skilled in the art that metal ion is in active constituent provided by the present invention with the shape of oxide
Formula is adhered on the carrier.
Catalyst of the present invention, in the active constituent, the total moles ratio according to metal ion is 100% meter, institute
State copper ion (Cu2+) molar percentage be 3-90%, aluminium ion (Al3+) molar percentage be 5-80%, zinc ion (Zn2 +) molar percentage be 5-72%；Preferably, the copper ion (Cu2+) molar percentage be 30-90%, aluminium ion
(Al3+) molar percentage be 5-35%, zinc ion (Zn2+) molar percentage be 5-35%.
Catalyst of the present invention, the active constituent is according to the molar amount of metal ion, and the carrier is with former silicon
The ratio between mole of the molar amount of acid, the active constituent and the orthosilicic acid is in 1:(5-100).
Catalyst of the present invention, preferably has the property that
Density is in 0.3-0.8g/cm3Between.Catalyst under above-mentioned density has higher specific surface area and hole
Rate, to have more excellent catalytic performance.
Present invention simultaneously provides the preparation methods of catalyst described in above-mentioned any one technical solution:
To orthosilicic acid solution be added dropwise active ingredient solution, adjust pH value to neutrality after, drying form gel, 250 DEG C-
After 450 DEG C of roastings to obtain the final product；Wherein, the active ingredient solution is to contain copper ion (Cu2+), aluminium ion (Al3+) and zinc ion
(Zn2+) solution.
Preferably, method of the present invention, the orthosilicic acid solution are the aqueous solution of orthosilicic acid, and mass concentration is
Between 5%-30%.
Preferably, in the active ingredient solution, the metal ion is provided in the form of nitrate.Nitrate has
Good dissolubility, in addition, can form oxide in subsequent roasting process, other salt do not have this characteristic.
Method of the present invention, it is preferable that the drying are as follows: not higher than 130 DEG C at a temperature of be dried.
Method of the present invention, it is preferable that active ingredient solution is added dropwise to orthosilicic acid solution, adjusts pH value to neutrality
Afterwards, drying forms gel, after 250 DEG C of -450 DEG C of roastings, further includes the steps that grinding, cleaning and roasts again.
The grinding are as follows: products therefrom after roasting is ground to less than 50 mesh powders；
The cleaning are as follows: by products therefrom after grinding with dust technology washing at least 5 times；
It is described to be roasted to again in 250 DEG C of -450 DEG C of roastings.
Preparation method of the present invention, it is preferable that the step of adjusting pH value is completed in a manner of alkali is added dropwise, more
It is preferred that the alkali is sodium hydroxide.
Present invention simultaneously provides catalyst described in above-mentioned any one technical solution in hydrogen production from methanol-steam reforming
Application.
Since catalyst provided by the present invention is lower through detection density, this represents, and the porosity of catalyst is bigger, table
The increase of area, the solidification of active catalytic atom, are further verified, catalyst provided by the present invention can effectively improve material
The catalytic efficiency of material, so that liquid speed from the 1:1 of traditional catalyst than being promoted to 2:1-3:1.It is capable of the use of effectively save catalysis
The volume of amount and methanol reformer.
To sum up, new catalyst provided by the invention, the catalyst by catalyst active component in traditional catalyst with urge
Physics appendix between agent carrier is converted into chemical appendix.And optimize the combination and active constituent of active constituent
With carrier ingredient ratio, using the catalytic activity with higher of catalyst prepared by method provided by the present invention, more preferable
Stability and weatherability.Above-mentioned catalyst has excellent application performance in the reaction of catalysis methanol reformation hydrogen production.
Certainly, implement any of the products of the present invention or method it is not absolutely required at the same reach all the above excellent
Point.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
Embodiment 1
The present embodiment provides a kind of catalyst and preparation method thereof, specifically comprise the following steps:
22.3 grams of nitrate trihydrate copper, 3.75 gram of nine water aluminum nitrate, 2.97 grams of zinc nitrate hexahydrates are dissolved in 50mL deionization
In water, in whipping process, above-mentioned solution is added drop-wise in the orthosilicic acid aqueous solution of 950 gram mass concentration 10% and (is added dropwise within 1 hour
It finishes).It is added dropwise, the sodium hydroxide solution of 1M is added dropwise to neutrality, filtering is considered cake and is dried overnight at 80 DEG C.Then, 350
DEG C high-temperature roasting 3 hours.Above-mentioned baked sample is ground to and is washed 5 times less than after 50 mesh powders with the nitric acid of 0.5M
More than, repeat above-mentioned drying, roasting process 2 times to obtain the final product.
Through detecting, the density of catalyst provided by the present embodiment is 0.61g/cm3。
The catalyst is added to stationary phase catalytic bed, after cremate, temperature is heated to 300 DEG C, reaches 2.3 in liquid speed ratio
When per hour, methanol conversion can achieve 99.7%；Hydrogen content 75.3% in reformation gas, carbon dioxide content 24.6%,
Carbon monoxide content is lower than 0.1%.
Embodiment 2
The present embodiment provides a kind of catalyst and preparation method thereof, specifically comprise the following steps:
22.3 grams of nitrate trihydrate copper, 3.75 gram of nine water aluminum nitrate, 2.97 grams of zinc nitrate hexahydrates are dissolved in 50mL deionization
In water, in whipping process, above-mentioned solution is added drop-wise in the orthosilicic acid aqueous solution of 2000 gram mass concentration 10% and (is added dropwise within 1 hour
It finishes).It is added dropwise, the sodium hydroxide solution of 1M is added dropwise to neutrality, filtering is considered cake and is dried overnight at 80 DEG C.Then, 400
DEG C high-temperature roasting 3 hours.Above-mentioned baked sample is ground to and is washed 5 times less than after 50 mesh powders with the nitric acid of 0.5M
More than, repeat above-mentioned drying, roasting process 2 times to obtain the final product.
Through detecting, the density of catalyst provided by the present embodiment is 0.58g/cm3。
Embodiment 3
The present embodiment provides a kind of catalyst and preparation method thereof, specifically comprise the following steps:
10 grams of nitrate trihydrate copper, 5 grams of aluminum nitrates, 8 grams of zinc nitrate hexahydrates are dissolved in 50mL deionized water, it is stirred
Above-mentioned solution is added drop-wise in 150 grams of orthosilicic acid aqueous solutions and (is added dropwise within 1 hour) by Cheng Zhong.It is added dropwise, the hydrogen of 1M is added dropwise
Sodium hydroxide solution to neutrality, filtering is considered cake and is dried overnight at 120 DEG C.Then, 450 DEG C high-temperature roasting 3 hours.By above-mentioned roasting
The sample burnt, which is ground to, to be washed 5 times or more less than after 50 mesh powders with the nitric acid of 0.5M, is repeated above-mentioned drying, was roasted
Journey to obtain the final product.
Embodiment 4
The present embodiment provides a kind of catalyst and preparation method thereof, specifically comprise the following steps:
2 grams of nitrate trihydrate copper, 6 grams of aluminum nitrates, 10 grams of zinc nitrate hexahydrates are dissolved in 50mL deionized water, it is stirred
Above-mentioned solution is added drop-wise in 200 grams of orthosilicic acid aqueous solutions and (is added dropwise within 1 hour) by Cheng Zhong.It is added dropwise, the hydrogen of 1M is added dropwise
Sodium hydroxide solution to neutrality, filtering is considered cake and is dried overnight at 80 DEG C.Then, 250 DEG C high-temperature roasting 3 hours.By above-mentioned roasting
The sample burnt, which is ground to, to be washed 5 times or more less than after 50 mesh powders with the nitric acid of 0.5M, is repeated above-mentioned drying, was roasted
Journey to obtain the final product.
Comparative example 1
This comparative example provides a kind of catalyst, and the embodiment that compares 1, difference is only that:
Zinc nitrate is replaced with into zinc sulfate.
By verifying, the density of the catalyst of this comparative example is 1.3g/cm3。
Comparative example 2
This comparative example provides a kind of catalyst, and the embodiment that compares 1, difference is only that: maturing temperature, specific as follows:
22.3 grams of nitrate trihydrate copper, 3.75 gram of nine water aluminum nitrate, 2.97 grams of zinc nitrate hexahydrates are dissolved in 50mL deionization
In water, in whipping process, above-mentioned solution is added drop-wise in the orthosilicic acid aqueous solution of 950 gram mass concentration 10% and (is added dropwise within 1 hour
It finishes).It is added dropwise, the sodium hydroxide solution of 1M is added dropwise to neutrality, filtering is considered cake and is dried overnight at 80 DEG C.Then, 600
DEG C high-temperature roasting 3 hours.Above-mentioned baked sample is ground to and is washed 5 times less than after 50 mesh powders with the nitric acid of 0.5M
More than, repeat above-mentioned drying, roasting process 2 times to obtain the final product.
Through detecting, the density of catalyst provided by the present embodiment is 1.4g/cm3。
It can be seen that change reaction condition is just unable to get, density is lower, porosity is bigger, specific surface area is even more ideal
Catalyst.
Test example 1
This test example provides application effect of the catalyst provided by embodiment 1-4 in preparing hydrogen by reforming methanol reaction and tests
Card.
Assembled reformer is sealed with screw, is put into water after being passed through argon gas by the air-tightness for first verifying that reformer chamber
In, each contact surface bubble-free appearance of reformer chamber then illustrates that air-tightness is good.Then by catalyst provided by embodiment 1
It is put into reformer chamber, is sealed against after assembling with screw, then start to heat until 350 DEG C reformer chamber, while with wriggling
Pump is passed through water alcohol than the methanol aqueous solution for 1.1:1 with certain flow rate, methanol aqueous solution first gasify in reformer chamber subsequently into
It is placed with the intracavitary of catalyst and carries out catalysis reaction, wherein catalyst needs just carry out methanol by the reduction of methanol 20min
The chemical reaction of reformation hydrogen production, i.e., 20min just has hydrogen generation after the temperature of reformer chamber reaches 240 DEG C.Then pass through row
The speed of water law Self -adaptive gas and then the conversion ratio for calculating methanol survey spectrometer analysis using gas phase and generate CO, H in gas2
Percentage.
It is detected after continuous work 2000 hours, methanol transformation efficiency is undamped；It is detected after cold start-up 1000 times, first
Alcohol transformation efficiency is undamped.
Embodiment 2-4 is detected by the same way, can obtain the zero-decrement result of methanol transformation efficiency.
It can thus be seen that catalyst provided by embodiment 1-4 can effective catalysis methanol reformation hydrogen production reaction, and
Anti- sintering, high recycling rate.
Although above having used general explanation, specific embodiment and test, the present invention is made to retouch in detail
It states, but on the basis of the present invention, it can be made some modifications or improvements, this is aobvious and easy to those skilled in the art
See.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to that the present invention claims guarantors
The range of shield.
Claims (10)
1. a kind of catalyst, including active constituent and carrier, which is characterized in that the active constituent includes copper ion, aluminium ion
And zinc ion, the carrier are using orthosilicic acid as the gelinite of raw material.
2. catalyst according to claim 1, which is characterized in that the total moles ratio according to metal ion is 100% meter, institute
The molar percentage for stating copper ion is 3-90%, and aluminum ions molar percentage is 5-80%, and the molar percentage of zinc ion is
5-72%；Preferably, the molar percentage of the copper ion be 30-90%, aluminum ions molar percentage be 5-35%, zinc from
The molar percentage of son is 5-35%；
And/or
The active constituent according to metal ion molar amount, the carrier with the molar amount of orthosilicic acid, the activity at
Point with the ratio between the mole of the orthosilicic acid in 1:(5-100).
3. catalyst according to claim 1 or 2, which is characterized in that the density of the catalyst is in 0.3-0.8g/cm3It
Between.
4. a kind of method for preparing the described in any item catalyst of claim 1-3, which is characterized in that be added dropwise to orthosilicic acid solution
Active ingredient solution, after adjusting pH value to neutrality, drying forms gel, after 250 DEG C of -450 DEG C of roastings to obtain the final product；Wherein, described
Active ingredient solution is the solution containing copper ion, aluminium ion and zinc ion.
5. according to the method described in claim 4, it is characterized in that, the orthosilicic acid solution is the aqueous solution of orthosilicic acid, quality
Concentration is between 5%-30%.
6. method according to claim 4 or 5, which is characterized in that in the active ingredient solution, the metal ion with
The form of nitrate provides.
7. according to the described in any item methods of claim 4-6, which is characterized in that the drying are as follows: be not higher than 130 DEG C of temperature
It is dried under degree.
8. according to the described in any item methods of claim 4-7, which is characterized in that it is molten that active constituent is added dropwise to orthosilicic acid solution
Liquid, after adjusting pH value to neutrality, drying forms gel, after 250 DEG C of -450 DEG C of roastings, further includes grinding, cleans and roast again
The step of burning.
9. according to the method described in claim 8, it is characterized in that, the grinding are as follows: be ground to products therefrom after roasting small
In 50 mesh powders；
And/or the cleaning are as follows: by products therefrom after grinding with dust technology washing at least 5 times；
And/or described be roasted to again roasts at 250 DEG C -450 DEG C.
10. application of the described in any item catalyst of claim 1-3 in hydrogen production from methanol-steam reforming.
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Citations (6)
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|---|---|---|---|---|
| JP2001046872A (en) * | 1999-08-11 | 2001-02-20 | Mitsubishi Heavy Ind Ltd | Methanol reforming catalyst, its production thereof and methanol reforming method |
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| CN102139213A (en) * | 2010-02-03 | 2011-08-03 | 中国科学院福建物质结构研究所 | Preparation method for synthesizing catalyst of ethylene glycol by sol-gel method and operation method |
| CN105776134A (en) * | 2014-12-24 | 2016-07-20 | 高化学株式会社 | Hydrogen production method by methanol-steam reforming |
| CN106492810A (en) * | 2016-10-10 | 2017-03-15 | 天津大学 | Zinc modification copper-based catalysts and preparation method for dimethyl ether-steam reforming hydrogen manufacturing |
| CN109908908A (en) * | 2019-02-18 | 2019-06-21 | 厦门大学 | A kind of base metal preparing hydrogen by reforming methanol catalyst and preparation method thereof |
-
2019
- 2019-08-06 CN CN201910721240.3A patent/CN110404547A/en active Pending
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| JP2001046872A (en) * | 1999-08-11 | 2001-02-20 | Mitsubishi Heavy Ind Ltd | Methanol reforming catalyst, its production thereof and methanol reforming method |
| KR20070082822A (en) * | 2006-02-18 | 2007-08-22 | 삼성에스디아이 주식회사 | Hydrocarbon reforming catalyst, method for manufacturing the same and a fuel treatment device comprising the same |
| CN102139213A (en) * | 2010-02-03 | 2011-08-03 | 中国科学院福建物质结构研究所 | Preparation method for synthesizing catalyst of ethylene glycol by sol-gel method and operation method |
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| CN106492810A (en) * | 2016-10-10 | 2017-03-15 | 天津大学 | Zinc modification copper-based catalysts and preparation method for dimethyl ether-steam reforming hydrogen manufacturing |
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| Title |
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| TAHER YOUSEFI AMIRI ET AL.: "Cogeled copper-silica aerogel as a catalyst in hydrogen production from methanol steam reforming", 《INTERNATIONAL JOURNAL OF HYDRONGEN ENERGY》 * |
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