CN107983392A - A kind of H2The preparation method of S selective oxidation catalysts - Google Patents
A kind of H2The preparation method of S selective oxidation catalysts Download PDFInfo
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/24—Nitrogen compounds
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8603—Removing sulfur compounds
- B01D53/8612—Hydrogen sulfide
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- C01B17/00—Sulfur; Compounds thereof
- C01B17/02—Preparation of sulfur; Purification
- C01B17/04—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides
- C01B17/0404—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by processes comprising a dry catalytic conversion of hydrogen sulfide-containing gases, e.g. the Claus process
- C01B17/0426—Preparation of sulfur; Purification from gaseous sulfur compounds including gaseous sulfides by processes comprising a dry catalytic conversion of hydrogen sulfide-containing gases, e.g. the Claus process characterised by the catalytic conversion
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Abstract
The invention discloses a kind of H2The preparation method of S selective oxidation catalysts.The catalyst is using F127 as template, and 3 amino phenols and hexamethylenetetramine are presoma, and the flash carbonization in nitrogen atmosphere, obtains after KOH is etched.Catalyst prepared by the present invention has big specific surface area, and N dopings are high, and sample prepared by the present invention is applied to H as catalyst2In the reaction of S selective catalysis.With common H2S catalysts selectives are compared, and prepared catalyst of the present invention shows superpower H2S selective catalysis performances.
Description
Technical field
The present invention relates to a kind of preparation of N doped porous nanos carbon material, and in particular to a kind of H2S selective oxidations are catalyzed
The preparation of agent and its application method, the application can not only eliminate the H of severe toxicity2S gases can also realize the recycling of element sulphur.
Background technology
H2One of the major pollutants of S as air, are a kind of high irritation severe toxicity gas, in aerobic and wet heat condition
Under, it can not only cause equipment and corrosion of piping, catalyst poisoning, but also can serious threat personal safety.With expanding economy,
The enhancing of people's environmental consciousness, the desulphurization problem of tail gas have been to be concerned by more and more people.Country has also formulated corresponding at the same time
Law, regulation, to H2S discharge capacitys have made stringent limitation.Hydrogen sulfide is the accessory substance in many industrial productions.At present, have 70
A variety of occupations can touch hydrogen sulfide.These occupations include mining, oil exploitation is synthesized with refinement, leather manufacture, rubber, coal gas
Produce, staple fibre, papermaking, dyestuff, printing and dyeing, sugaring, food processing etc..In addition, also there is hydrogen sulfide production in organic matter corruption place
It is raw, and easily accumulate in urban sewage pipe, Jiao Jing, septic tank, cesspool, paper pulp pond and the other kinds fermentation of improper ventilation
Pond and vegetables pickling pool when in closing and semi-enclosed facility, container and pipeline or low-lying place therefore when clearing up these places,
Hydrogen sulfide can be contacted.In addition, hydrogen sulfide is water-soluble and methanol, ethanol, explosive mixture is formed with air hybrid energy；Meet bright
Fire, height is led to guide combust to explode.At present, H2The removing of S mainly uses Crouse (Claus methods) technique.The technique needs
First absorb H2Concentrate after S, then elemental sulfur is produced by further catalytic treatment.Removing H can be reached2The purpose of S gases, and can be real
The now wherein recycling of element sulphur.But since thermodynamics limits, the also sulfide containing 3%-5% fails in Claus tail gases
Change into elemental sulfur.Limited as environmental legislation is increasingly stringent, it is necessary to find one kind from thermodynamical equilibrium, can efficient removal
H2S simultaneously realizes the processing method that S simple substance recycles.
In recent years, selective catalytic oxidation H2The method of S attracts widespread attention, and reacts as shown in formula (1).H2S is selected
Selecting property catalytic oxidation limits from thermodynamical equilibrium, theoretical H2S conversion ratios can reach 100 %.And the reaction process
Advanced, process is simple.Because reaction is exothermic reaction, H2Heat credit can be not required in 0.3 more than % of S contents, and energy consumption is low.Cause
This, which has a good application prospect, and realizes that the key of this process is that exploitation has efficient catalytic activity and choosing
The catalyst of selecting property.
H2S + 1/2O2 → (1/n) Sn + H2O (1)
It is applied to H at present2The catalyst in S selective catalytic oxidations field mainly has traditional carbon material, molecular sieve and metal oxidation
Thing.But from document, above catalyst still suffers from shortcoming.For example, activated carbon, molecular screen material are because of its specific surface area
Greatly, duct, which is enriched, accelerates its mass transport process and the product sulfur desorption rate, but the material autocatalysis center is few, it is necessary to load
Active component just has catalytic performance after being modified, thus cumbersome there are preparation process and active component easily flows in the reaction
The problems such as mistake；Metal oxide itself has active site, and stability is higher, but specific surface area is smaller, limits
It is to H2The absorption of S, and sulphur covering activated centre easily occurs in the reaction, catalyst performance is greatly reduced.Therefore,
In addition to modified on original carrier, the efficient H of Development of Novel2S selective oxidation catalysts are very necessary.
Research finds that large specific surface area and substantial amounts of avtive spot, are conducive to hydrogen sulfide adsorption and are carried out in avtive spot
Reaction.The problem of for appearing above, we are using organic carbon source as presoma, high in nitrogen atmosphere using F127 as template
Temperature carbonization, then prepares large surface and the micropore carbon ball of high nitrogen content using KOH etchings.With other documents and patent report
Similar material compares, and the N doped porous carbon materials prepared in this way have bigger serface, nitrogen high uniformity point
Dissipate and have the advantages of high nitrogen content, this is also that the material is applied to H as catalyst2It is critically important on S selective catalytic oxidations
A bit.
The content of the invention
It is an object of the invention to for the deficiency in current material, develop a kind of superior H of catalytic performance2S selectivity
Catalyst for catalytic oxidation.Using 3- amino phenols and hexamethylenetetramine as presoma, F127 is template, by nitrogen atmosphere
High-temperature heat treatment, then the micropore carbon ball for having synthesized N doping is etched by KOH.Can also be by regulating and controlling heat during synthesis
The temperature of processing, to obtain the micropore carbon ball of different content N doping, prepared sample is in H2S selective catalytic oxidations are answered
Fabulous catalytic performance is shown in.The micropore carbon materials for the high-ratio surface high nitrogen content that the invention is first prepared this method
Material, uses in H as catalyst2In the application of S selective catalytic oxidations, this designs new and effective H for exploitation2S is selectively urged
Change oxidation catalyst and new approaches are provided.
To achieve these goals, the present invention adopts the following technical scheme that:
A kind of N doping carbon materials H2The preparation of S selective oxidation catalysts, using F127 as template, before organic carbon source is
Body is driven, carbonization treatment obtains the micropore carbon ball of N doping in high temperature nitrogen atmosphere, and sample is made after KOH etches high-temperature heat treatment,
Reactivity site is to mix exposed N element, 30 ~ 41wt% of doping of N.
It is concretely comprised the following steps：
（1）0.654g 3- amino phenols and 0.42gHMTA are dissolved in 75ml deionized waters, it is molten that stirring and dissolving forms clarification mixing
Liquid A；Then 0.47g F127 are dissolved in the deionized water of 5ml, dissolving forms settled solution B；Will be molten during stirring
Liquid A is slowly added into and homogeneous mixed solution is formed in solution B, and when stirring 12 ~ 24 is small under the conditions of 50 DEG C of oil bath, completes
Solution is transferred in the polytetrafluoroethyllining lining of cleaning afterwards and fills kettle, and when 95 DEG C of reactions 10 ~ 16 is small in constant temperature oven, treat from
Filtering, washing, dry collection obtain sample after being so cooled to room temperature.
（2）Will（1）In obtained sample be contained in porcelain Noah's ark, 250 DEG C of pre-oxidation 1 ~ 3 in the tube furnace of air atmosphere
Hour.After the completion of when 360 DEG C of roastings 1 ~ 3 are small in nitrogen atmosphere, the flash carbonization 15 ~ 25 in 700 ~ 900 DEG C of high temperature at once
Minute, room temperature is then naturally cooled in nitrogen atmosphere and collects sample.
（3）Will（2）In obtained sample with mass ratio 1:1 and mass fraction be 10 ~ 15% KOH/methanol solution mix,
After being thoroughly mixed, mixed liquor is transferred to rotate in Rotary Evaporators and is done, will then rotated dry sample and be contained in porcelain Noah's ark
It is placed in tube furnace, when heat treatment 1 ~ 3 is small in 700 ~ 900 DEG C of nitrogen atmosphere.Then by the sample concentration after processing
Wherein excessive KOH is neutralized for the dilute hydrochloric acid of 0.5 ~ 0.6mol/L, sample is washed to neutrality with distilled water, is finally dried to obtain
The micropore carbon ball of N doping.
Using：The N micropore carbon balls adulterated are applied to selective catalytic oxidation H2S is sulphur simple substance and the catalytic reaction of water
In, reaction temperature is 90 DEG C ~ 210 DEG C, and unstripped gas is 5000 ppm H2S, 2500 ppm O2, N2For three components of Balance Air
Gas, feed gas flow rates V are 20 mLmin-1, tube inner diameter is 5 mm.
Catalyst described in step is used in H2In the reaction of S selective catalytic oxidations, its performance evaluation formula is as follows：
In order to overcome existing H2Insufficient existing for S selective oxidation catalysts, it is superior that we develop a kind of catalytic performance
H2S selective oxidation catalysts.Using 3- amino phenols and hexamethylenetetramine as presoma, F127 is template, by
Different high-temperature heat treatments in nitrogen atmosphere, then a series of microporous carbon sphere catalyst for having synthesized N doping is etched by KOH, obtain
Catalyst there is following advantage：
（1）Synthetic method that the present invention uses is simple and practicable to be conducive to promote on a large scale, has universality；
（2）Catalyst prepared by the present invention is the same as conventional H2S catalyst for catalytic oxidation compares with big specific surface area
（1500-2300 m2/g）, substantial amounts of avtive spot, without further supporting catalytic active phase；
（3）The present invention is applied to H2The catalyst of S catalysis oxidations has very high N dopings（30~41wt%）, show excellent
Catalytic performance.
Brief description of the drawings
Fig. 1 carries out H for embodiment 1-4 and comparative example2H in S catalysis oxidation catalytic performance tests2S conversion ratios are with temperature
Spend the curve map of change；
Fig. 2 carries out H for embodiment 1-4 and comparative example2S in S catalysis oxidation catalytic performance tests selectively becomes with temperature
The curve map of change；
Fig. 3 carries out H for embodiment 1-4 and comparative example2H in S catalysis oxidation catalytic performance tests2S sulphur yield with temperature
The curve map of change；
Fig. 4 is the electron microscopic picture of the catalyst S1 prepared by embodiment 1.
Embodiment
In order to make the content of the present invention more clearly understood, the specific embodiment below according to the present invention and combination
Attached drawing, the present invention is described in further detail：
Embodiment 1：
Weigh 0.654g 3- amino phenols, 0.42g HMTA（Hexamethylenetetramine）, it is dissolved in 75ml deionized waters, treats completely
Dissolving forms the solution A of clarification；Weigh 0.47g F127 templates to be dissolved in 5ml deionized waters, wait to be completely dissolved to form clarification
Solution B；Then solution A is slowly added into solution B in whipping process and forms mixed solution C, then will mixed molten
Liquid C stirred in 50 DEG C of oil baths 16 it is small when, 16 it is small when after by mixture be transferred to cleaning polytetrafluoroethyllining lining in fill kettle, and
It is placed in baking oven when 95 DEG C of holdings 12 are small, takes out reaction kettle when room temperature is naturally cooled to, filtered, washed, drying receipts
Collect sample.The sample that previous step is collected is contained in porcelain Noah's ark, and is put into tube furnace, it is pre- in 250 DEG C of air atmosphere
2h is aoxidized, heating rate is 1 DEG C/min.Sample after pre-oxidation is put into the tube furnace of nitrogen atmosphere, first at 360 DEG C
2h is roasted, then the flash carbonization 20min at a high temperature of 700 DEG C, the flow into tube furnace nitrogen are 50ml/min at once, are risen
Warm speed is 1 DEG C/min.After the completion of, it is to be cooled to room temperature when collect sample, by the sample gathered using mass ratio as 1:1 ratio
Example and the KOH/methanol solution that concentration is 10wt% mix, and mixed liquor is transferred to rotate in Rotary Evaporators and is done, then will rotation
The sample being evaporated is contained in porcelain Noah's ark and is put into the tube furnace of nitrogen atmosphere, and 2h is roasted at a high temperature of 700 DEG C.After burning-out
With KOH excessive in the dilute hydrochloric acid that concentration is 0.5 ~ 0.6mol/L and in sample, then filter, washed sample with deionized water
To neutrality, target sample is obtained after collecting sample drying, is denoted as catalyst S1.
Embodiment 2：
Weigh 3.27g 3- amino phenols, 2.2g HMTA（Hexamethylenetetramine）, it is dissolved in 375ml deionized waters, treats completely molten
Solution forms the solution A of clarification；Weigh 2.35g F127 templates to be dissolved in 25ml deionized waters, wait to be completely dissolved to form clarification
Solution B；Then solution A is slowly added into solution B in whipping process and forms mixed solution C, then by mixed solution C
When stirring 16 is small in 50 DEG C of oil baths, 16 it is small when after mixture be transferred in the polytetrafluoroethyllining lining of cleaning fill kettle, and
In baking oven when 95 DEG C of holdings 12 are small, reaction kettle is taken out when room temperature is naturally cooled to, is filtered, washed, dried and collect sample
Product.The sample that previous step is collected is contained in porcelain Noah's ark, and is put into tube furnace, 2 are pre-oxidized in 250 DEG C of air atmosphere
Hour, heating rate is 1 DEG C/min.Sample after pre-oxidation is put into the tube furnace of nitrogen atmosphere, is roasted first at 360 DEG C
2h is burnt, and then the flash carbonization 20min at a high temperature of 700 DEG C, the flow into tube furnace nitrogen are 50ml/min, heating speed
Rate is 1 DEG C/min.After the completion of, it is to be cooled to room temperature when collect sample, by the sample gathered using mass ratio as 1:1 ratio and
Concentration is that the KOH/methanol solution of 10wt% mixes, and mixed liquor is transferred to rotate in Rotary Evaporators and is done, then does revolving
Sample be contained in porcelain Noah's ark and be put into the tube furnace of nitrogen atmosphere, at a high temperature of 700 DEG C roasting 2 it is small when, access tube
The nitrogen flow of formula stove is 50ml/min, and heating rate is 1 DEG C/min.With the dilute hydrochloric acid that concentration is 0.5 ~ 0.6mol/L after burning-out
KOH excessive in sample is neutralized, is then filtered, sample is washed to neutrality with deionized water, mesh is obtained after collecting sample drying
Standard specimen product, are denoted as catalyst S2.
Embodiment 3（Most preferred embodiment）：
Weigh 0.654g 3- amino phenols, 0.42g HMTA（Hexamethylenetetramine）, it is dissolved in 75ml deionized waters, treats completely
Dissolving forms the solution A of clarification；Weigh 0.47g F127 templates to be dissolved in 5ml deionized waters, wait to be completely dissolved to form clarification
Solution B；Then solution A is slowly added into solution B in whipping process and forms mixed solution C, then will mixed molten
Liquid C stirred in 50 DEG C of oil baths 16 it is small when, 16 it is small when after by mixture be transferred to cleaning polytetrafluoroethyllining lining in fill kettle, and
When 95 DEG C of reactions 12 are small in constant temperature oven, reaction kettle is taken out when room temperature is naturally cooled to, is filtered, washed, drying receipts
Collect sample.The sample that previous step is collected is contained in porcelain Noah's ark, and is put into tube furnace, it is pre- in 250 DEG C of air atmosphere
2h is aoxidized, heating rate is 1 DEG C/min.Sample after pre-oxidation is put into the tube furnace of nitrogen atmosphere, first at 360 DEG C
2h is roasted, then the flash carbonization 20min at a high temperature of 800 DEG C, the flow into tube furnace nitrogen are 50ml/min at once, are risen
Warm speed is 1 DEG C/min.After the completion of, it is to be cooled to room temperature when collect sample, by the sample gathered using mass ratio as 1:1 ratio
Example and the KOH/methanol solution that concentration is 10wt% mix, and mixed liquor is transferred to rotate in Rotary Evaporators and is done, then will rotation
The sample being evaporated is contained in porcelain Noah's ark and is put into the tube furnace of nitrogen atmosphere, and 2h is roasted at a high temperature of 800 DEG C.After burning-out
With KOH excessive in the dilute hydrochloric acid that concentration is 0.5 ~ 0.6mol/L and in sample, then filter, washed sample with deionized water
To neutrality, target sample is obtained after collecting sample drying, is denoted as catalyst S3.
Embodiment 4：
Weigh 0.654g 3- amino phenols, 0.42g HMTA（Hexamethylenetetramine）, it is dissolved in 75ml deionized waters, treats completely
Dissolving forms the solution A of clarification；Weigh 0.47g F127 templates to be dissolved in 5ml deionized waters, wait to be completely dissolved to form clarification
Solution B；Then solution A is slowly added into solution B in whipping process and forms mixed solution C, then will mixed molten
Liquid C stirs 16h in 50 DEG C of oil baths, 1 and then mixture is transferred in the polytetrafluoroethyllining lining of cleaning fills kettle, and in baking oven
In 95 DEG C keep 12 it is small when, take out reaction kettle when room temperature is naturally cooled to, filtered, washed, dry collection sample.Will
The sample that previous step is collected is contained in porcelain Noah's ark, and is put into tube furnace, and 2h is pre-oxidized in 250 DEG C of air atmosphere, is risen
Warm speed is 1 DEG C/min.Sample after pre-oxidation is put into the tube furnace of nitrogen atmosphere, 2h is roasted at 360 DEG C first, connects
The flash carbonization 20min at a high temperature of 900 DEG C at once, the flow into tube furnace nitrogen is 50ml/min, heating rate 1
℃/min.After the completion of, it is to be cooled to room temperature when collect sample, by the sample gathered using mass ratio as 1:1 ratio and concentration
Mixed for 10% KOH/methanol solution, mixed liquor is transferred in Rotary Evaporators and rotates dry, then to do revolving sample
It is contained in porcelain Noah's ark and is put into the tube furnace of nitrogen atmosphere, 2h is roasted at a high temperature of 900 DEG C.It is with concentration after burning-out
Excessive KOH, then filters, is washed sample to neutrality with deionized water in the dilute hydrochloric acid of 0.5 ~ 0.6mol/L and in sample,
Target sample is obtained after collecting sample drying, is denoted as catalyst S4.
Comparative example 1：
By 3 ~ 5g starch dissolutions in 45 mL deionized waters, after stirring evenly, solution is moved into the stainless steel that volume is 50 mL
In the liner of reaction kettle, 4 ~ 20 h of constant temperature in 160 ~ 200 DEG C of electric heating constant-temperature blowing drying box is finally placed in.After reaction,
Solution slightly has the smell of burning in muddy black or rufous.After being repeated with absolute ethyl alcohol, rinsing 3 times, it is dispersed in water, 80
Dried at DEG C, obtain catalyst D1.
Comparative example 2：
3 ~ 5 g glucose are dissolved in 45 mL deionized waters, after stirring evenly, it is the stainless of 50 mL that solution is moved to volume
In the liner of steel reaction kettle, 4 ~ 20 h of constant temperature in 160 ~ 200 DEG C of electric heating constant-temperature blowing drying box is finally placed in.Reaction terminates
Afterwards, solution slightly has the smell of burning in muddy black or rufous.After being repeated with absolute ethyl alcohol, rinsing 3 times, it is dispersed in water,
Dried at 80 DEG C, obtain catalyst D2.
Comparative example 3：
3 ~ 5 g sucrose are dissolved in 45 mL deionized waters, after stirring evenly, solution is moved into the stainless steel that volume is 50 mL
In the liner of reaction kettle, 4 ~ 20 h of constant temperature in 160 ~ 200 DEG C of electric heating constant-temperature blowing drying box is finally placed in.After reaction,
Solution slightly has the smell of burning in muddy black or rufous.After being repeated with absolute ethyl alcohol, rinsing 3 times, it is dispersed in water, 80
Dried at DEG C, obtain catalyst D3.
Evaluate example
The characterization parameter of the physical property of sample and comparative example of the table 1 prepared by embodiment 1 ~ 4, can be bright from table 1
Aobvious finds out, the catalyst prepared by the present invention has the specific surface area of super large, but also possesses high N dopings, this incite somebody to action this
The sample prepared is invented as H2One of important feature of S catalyst for catalytic oxidation.
Table 1 is embodiment 1-4 and comparative example specific surface area, the characterization parameter of particle size range and N content
Sample prepared by embodiment 1 ~ 4 and the sample of comparative example are subjected to H2S catalysis oxidation catalytic performance tests, Fig. 1 are to urge
Change H in performance evaluation2S conversion ratio variation with temperature curves, from figure we can see that using urging prepared by the present invention
The H of agent2Conventional carbon catalyst of the S conversion ratios substantially all than comparative example is higher by very much, and wherein most preferred embodiment catalyst is 120
DEG C when, H2S conversion ratios can reach 100%, show excellent catalytic performance.Fig. 2 is S selectivity in catalytic performance test
Variation with temperature curve, as can be seen from the figure the S selectivity of the catalyst prepared by the present invention is all higher than the catalysis of common carbon
Agent；Fig. 3 is the change curve of S yield with temperature, and as can be seen from the figure the S yields of the catalyst prepared by the present invention are all higher than
Common C catalyst, the catalysis prepared by the present invention is sufficiently shown from these data, and to surpass Large ratio surface, high leaded wastewater excellent
Characteristic, and by H2The application of S selective catalytic oxidations into S simple substance above shows the catalytic more powerful than traditional catalyst
Energy.
Obviously, the above embodiments are merely examples for clarifying the description, and the restriction not to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in the protection domain of the invention.
Claims (5)
- A kind of 1. H2The preparation method of S selective oxidation catalysts, it is characterised in that：The H2S selective catalytic oxidations Catalyst is using organic matter as presoma, and F127 is template, in nitrogen atmosphere high temperature flash carbonization, the shape after KOH is etched Into N doping microporous carbon sphere catalyst, wherein, 30 ~ 41wt% of doping of N.
- 2. preparation method according to claim 1, it is characterised in that：Carburizing temperature in nitrogen atmosphere is 700 ~ 900 ℃。
- 3. preparation method according to claim 1, it is characterised in that specifically comprise the following steps：（1）By 3- amino phenols and hexamethylenetetramine in mass ratio 1:1~2:1 is dissolved in deionized water, wait to be completely dissolved to be formed it is clear Clear mixed solution A；Template F127 is dissolved in deionized water, the solution B of clarification is formed after being completely dissolved；（2）During stirring, by step（1）In the mixed solution A that is made into be slowly added into solution B, continue to stir into Uniform solution C；（3）By step（2）In solution C continue in 50 DEG C of oil bath pan stirring 12 ~ 24 it is small when, after the completion of stirring solution dress Enter the inside lining filling kettle of polytetrafluoroethylene (PTFE), the reaction was continued in 95 DEG C of constant temperature oven 10 ~ 16 it is small when, after the completion of product was carried out Filter washing is dried；（4）By step（3）In obtained product in air atmosphere, 250 DEG C calcining 1 ~ 3 it is small when；After the completion of, the production that will obtain Thing calcined in 360 DEG C of nitrogen atmospheres 1 ~ 3 it is small when, flash carbonization 15 ~ 25 minutes is then carried out at a high temperature of 700 ~ 900 DEG C, Then after naturally cool to collecting sample after room temperature；（5）By step（4）Obtained sample is with mass ratio 1:1 mixes with 10 ~ 15wt%KOH methanol solutions, and uses Rotary Evaporators It is contained in after revolving is dry in porcelain Noah's ark, porcelain Noah's ark is put into tube furnace, calcine 1 in the nitrogen atmosphere of 700 ~ 900 DEG C of high temperature ~ 3 it is small when, after the completion of the KOH in sample is neutralized with the hydrochloric acid of 0.5 ~ 0.6mol/L, finally with deionized water by sample wash to Neutrality, obtains the microporous carbon sphere catalyst of N doping after drying.
- A kind of 4. H made from preparation method as claimed in claim 12The application of S selective oxidation catalysts, its feature It is：The microporous carbon sphere catalyst of the N doping is used for H2The selective catalytic oxidation reaction of S.
- 5. application according to claim 4, it is characterised in that：The microporous carbon sphere catalyst of N doping is applied to selectivity Catalysis oxidation H2S is in sulphur simple substance and the catalytic reaction of water, and reaction temperature is 90 DEG C ~ 210 DEG C, and unstripped gas is 5000 ppm H2S, 2500 ppm O2, N2For three component gas of Balance Air, feed gas flow rates are 20 mLmin-1, tube inner diameter 5 mm。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110026228A (en) * | 2019-05-22 | 2019-07-19 | 福州大学 | A kind of preparation of nitrogenous porous carbon materials and its H2S selective catalytic oxidation application |
| CN110694659A (en) * | 2019-10-09 | 2020-01-17 | 福州大学 | Layered porous nitrogen-doped carbon material and preparation method and application thereof |
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